AI Coding Assistants 1
▼
Uses GitHub Copilot for writing basic Rust code: function autocompletion, generating struct definitions with derive macros. Understands when Copilot suggestions violate ownership rules and corrects the proposed code.
Applies Copilot to accelerate Rust development: generating impl blocks for traits, writing unit tests through #[test], working with error handling (thiserror/anyhow). Critically verifies suggestions for correct lifetime annotations and async patterns.
Optimizes Copilot usage in Rust projects: workspace context configuration for accurate suggestions, generating complex generic constructs and macro_rules. Reviews AI suggestions for unsafe correctness, performance implications and Rust code idiomaticity.
Defines AI assistant usage policy in Rust development: guidelines for Copilot considering license compliance (cargo-deny), restrictions on generating unsafe code. Implements best practices for code review of AI-generated Rust code focusing on memory safety and security.
Algorithms & Data Structures 2
▼
Understands the fundamentals of Algorithms & Complexity at a basic level. Applies simple concepts in work tasks using Rust. Follows recommendations from senior developers when solving problems.
Independently applies algorithmic thinking in Rust: selects iterator-based algorithms for zero-copy processing, understands ownership model impact on algorithm design, evaluates concurrent algorithm patterns with atomics and channels. Analyzes complexity of data processing in systems-level Rust code.
Applies algorithmic expertise in Rust development: zero-copy algorithm design for high-throughput data processing, SIMD-optimized algorithms for computational workloads, lock-free concurrent algorithms using atomics. Designs memory-efficient algorithms leveraging Rust's ownership model for predictable performance.
Designs algorithmic solutions for high-load Rust services applying zero-cost abstractions and iterator chains. Analyzes complexity considering allocator specifics and CPU cache lines, profiling through criterion and flamegraph.
Understands the fundamentals of Data Structures at a basic level. Applies simple concepts in work tasks using Rust. Follows recommendations from senior developers when solving problems.
Independently selects appropriate data structures in Rust: Vec vs VecDeque for sequential data, HashMap vs BTreeMap for keyed lookups, Arc<Mutex> vs channels for shared state. Understands trade-offs between ownership patterns and data structure borrowing semantics.
Selects optimal data structures for Rust applications: BTreeMap for cache-friendly ordered access, arena allocators for graph structures, crossbeam queues for lock-free concurrent patterns. Optimizes memory layout using repr(C) and packed structs. Designs zero-copy data structures with proper lifetime bounds and Pin semantics.
Develops specialized data structures in Rust considering ownership model, using types from std::collections and external crates (im, dashmap). Ensures lock-free access through crossbeam and atomic types for concurrent scenarios.
API Management 2
▼
Documents REST API of Rust services through utoipa attributes (#[utoipa::path]) on Axum/Actix-web endpoints. Describes request/response schemas through derive(ToSchema) and generates Swagger UI through utoipa-swagger-ui middleware.
Develops comprehensive API documentation for Rust services: OpenAPI 3.0 through utoipa with examples, authentication description (SecurityScheme), grouping by tags. Configures automated documentation generation in CI and publishing through Swagger UI/Redoc.
Designs API documentation strategy for Rust services: automated specification compliance tests through spectral, changelog generation on proto/OpenAPI changes. Implements documentation-as-code approach with rustdoc for internal APIs and utoipa for public ones.
Defines API documentation standards for Rust platform: mandatory utoipa annotations in code review, automated publishing to developer portal. Develops CI checks for documentation completeness and examples for each endpoint with cargo test integration.
Understands API versioning principles in Rust services: URL-based (/v1/, /v2/), header-based approaches. Implements basic versioning through separate route modules in Axum/Actix-web and maintains compatibility when adding new fields through Option<T>.
Implements API versioning in Rust services through Axum middleware or Actix-web guards, supporting multiple versions simultaneously. Applies serde with #[serde(default)] and #[serde(skip_serializing_if)] for backward-compatible JSON schema evolution.
Designs versioning strategy for Rust microservices: content negotiation through Accept headers, Protobuf schema versioning through reserved fields. Implements adapter layers between API versions with compile-time verification through From/Into traits.
Defines API versioning standards for Rust platform: semantic versioning for gRPC contracts, automated breaking change detection in CI. Develops deprecation workflow with sunset headers and usage metrics for deprecated versions.
API Protocols 1
▼
Understands gRPC fundamentals in Rust: proto file definitions, code generation with tonic-build, and basic unary calls. Follows team patterns for implementing gRPC services with tonic framework and type-safe protobuf message handling.
Develops gRPC services in Rust with tonic: implements streaming RPC with tokio-stream, configures Tower middleware for interceptors, uses tonic-health for health checking. Applies Rust type system for compile-time guarantees of correct gRPC interactions.
Designs high-performance gRPC services in Rust: optimizes through custom allocators and zero-copy deserialization, configures TLS through rustls, implements connection pooling with Tower balance. Benchmarks and profiles gRPC services for maximum throughput.
Defines gRPC architecture for Rust ecosystem: creates procedural macros to simplify gRPC service implementation, designs integration with async runtime (tokio/async-std), standardizes error handling through thiserror and custom Status codes. Mentors team on idiomatic Rust for gRPC.
Application Security 1
▼
Applies basic secure coding practices in Rust: using Result instead of panic, input validation through validator, integer overflow protection through checked arithmetic. Understands how Rust's ownership model prevents memory-safety vulnerabilities.
Develops secure Rust code: secret protection through secrecy crate (Secret<String>), constant-time comparisons, zeroize for memory clearing. Applies principle of least privilege through the type system, restricting operations through newtype patterns and sealed traits.
Designs security architecture for Rust services: cryptography through ring/rustcrypto, TLS through rustls (memory-safe TLS), audit trail through structured logging. Conducts code reviews focusing on unsafe blocks, FFI boundaries and race conditions, applying MIRI for verification.
Defines secure coding standards for Rust platform: mandatory unsafe review, fuzzing policy for parsers, secrets management through HashiCorp Vault. Develops security linting through custom clippy rules and implements SBOM generation through cargo-cyclonedx.
Caching 2
▼
Uses caching strategies at a basic level in actix-web/axum. Performs simple tasks using established templates. Understands basic concepts and follows team practices.
Independently implements tasks with caching strategies in actix-web/axum. Understands internals and optimizes performance. Writes tests with cargo test.
Implements caching strategies in Rust services: in-memory through moka/cached with TTL and LRU policies, HTTP caching through tower-http middleware. Applies cache-aside pattern with type-safe wrapper structs and cache stampede handling through probabilistic early expiration.
Designs multi-level cache architecture for Rust services: L1 (thread-local), L2 (shared moka), L3 (Redis) with write-through/write-behind strategies. Develops generic cache trait with support for invalidation, warming and hit-rate monitoring through Prometheus metrics.
Uses Redis at a basic level in actix-web/axum. Performs simple tasks using established templates. Understands basic concepts and follows team practices.
Independently implements tasks with Redis in actix-web/axum. Understands internals and optimizes performance. Writes tests with cargo test.
Integrates Redis into Rust services through redis crate with connection pooling support (deadpool-redis) and async commands on Tokio. Implements caching with TTL, pub/sub for invalidation and data serialization through serde_json/bincode for optimal performance.
Designs Redis caching layer for Rust microservices: cluster configurations, Lua scripts through redis::Script, distributed locks with Redlock algorithm. Develops type-safe cache abstractions with generic trait Cache<K,V> and automatic serialization through serde.
CI/CD 1
▼
Sets up basic CI pipeline for Rust projects in GitHub Actions: cargo check, cargo test, cargo clippy and rustfmt --check. Understands dependency caching through actions/cache for ~/.cargo and target/ directories to speed up builds.
Develops CI/CD pipeline for Rust services: testing matrix on stable/nightly, cargo-tarpaulin for coverage, cargo-audit for vulnerabilities. Configures Docker builds through multi-stage, image publishing and deployment through ArgoCD/Flux.
Designs CI/CD infrastructure for Rust monorepo: incremental builds through cargo-hakari, parallel jobs for workspace crates, release automation through cargo-release. Optimizes build time through sccache, self-hosted runners and Docker layer caching.
Defines CI/CD standards for Rust platform: mandatory checks (clippy, deny, audit, MSRV), deployment gates with canary and smoke tests. Develops reusable workflows for cross-team standardization and integrates security scanning (cargo-vet, cargo-deny) into the merge process.
Clean Code & Refactoring 1
▼
Understands the fundamentals of Code Quality & Refactoring at a basic level. Applies simple concepts in work tasks using Rust. Follows recommendations from senior developers when solving problems.
Independently applies code quality practices in Rust development. Writes clean code with clear ownership semantics, proper error types, and ergonomic APIs. Understands trade-offs between generics complexity and API usability. Reviews code for unsafe usage, lifetime correctness, and trait design clarity.
Designs code quality standards for Rust projects: Clippy lint configurations, unsafe code review policies, ownership pattern guidelines. Refactors complex lifetime hierarchies and trait implementations for clarity. Establishes review practices for memory safety, zero-cost abstractions, and macro hygiene.
Implements comprehensive Rust code quality system: strict clippy lints (#![deny(clippy::all)]), rustfmt configuration, cargo-audit for dependencies. Configures CI pipelines with MSRV checks, miri for undefined behavior and cargo-deny for licenses.
Cloud Providers 1
▼
Uses basic AWS services for Rust applications: EC2/ECS for deployment, S3 via aws-sdk-s3, RDS PostgreSQL. Understands IAM roles, security groups and configures AWS CLI for local development with aws-sdk-rust.
Integrates AWS services in Rust through aws-sdk: SQS/SNS for messaging, DynamoDB through serde integration, Lambda through cargo-lambda. Configures ECS Fargate for Rust containers with task definitions, service discovery and CloudWatch logging through tracing.
Designs AWS infrastructure for Rust services: EKS with Karpenter, ElastiCache Redis, Aurora PostgreSQL. Optimizes Lambda cold start for Rust (minimal runtime, AL2023), implements infrastructure-as-code through CDK/Terraform and configures VPC architecture.
Defines AWS architecture for Rust platform: multi-account strategy, PrivateLink for services, cost optimization through Graviton (ARM compilation). Develops Terraform modules for standardized provisioning and implements FinOps practices with automated cost alerting.
Concurrency & Parallelism 2
▼
Understands the fundamentals of Async Programming at a basic level. Applies simple concepts in work tasks using Rust. Follows recommendations from senior developers when solving problems.
Independently applies async programming in Rust: tokio/async-std runtime, Future composition with async/await, pinning and lifetime management in async contexts. Understands trade-offs between sync and async Rust, task spawning vs structured concurrency.
Designs async architectures in Rust: tokio runtime tuning, custom Future implementations, async trait patterns and pinning strategies. Mentors team on Rust async performance optimization and choosing between sync/async boundaries.
Designs complex asynchronous systems on Tokio/async-std with backpressure management, graceful shutdown and structured concurrency. Configures runtime (work-stealing, current-thread), manages spawn strategies and debugs async code through tokio-console.
Understands the fundamentals of Multithreading at a basic level. Applies simple concepts in work tasks using Rust. Follows recommendations from senior developers when solving problems.
Independently applies multithreading in Rust: Send/Sync trait system for thread safety guarantees, Arc<Mutex> for shared state, tokio runtime for async concurrency, crossbeam for lock-free data structures. Explains Rust ownership model advantages for concurrent code in review.
Has deep expertise in Rust concurrency: designs zero-cost concurrent abstractions leveraging ownership system, implements custom async runtimes and lock-free data structures, optimizes tokio runtime tuning for high-throughput services. Mentors team on advanced Rust concurrency patterns for systems programming.
Designs multi-threaded Rust systems with Send/Sync guarantees using Arc<Mutex>, RwLock and crossbeam channels. Applies Rayon for data parallelism, configures thread pools and profiles contention through flamegraph and perf.
Data Modeling 2
▼
Designs simple data models for Rust applications, creating struct definitions with derive(sqlx::FromRow) or Diesel schemas. Understands mapping between Rust types and PostgreSQL, uses Option<T> for nullable fields and enum types through sqlx::Type.
Independently designs schemas and optimizes queries with data modeling and schema design. Understands indexing and query execution plans. Uses diesel/sea-orm effectively.
Develops domain data models for Rust services with separation into persistence and domain layers. Applies newtype patterns for ID types (UserId(Uuid)), JSONB for flexible attributes through serde, and designs normalized schemas considering query patterns.
Designs data models for Rust microservice platform: bounded contexts with separate schemas, event sourcing through append-only tables. Develops shared domain type libraries (domain-primitives crate) and serialization standards through serde for inter-service exchange.
Creates basic migrations for Rust projects through refinery or sqlx migrate, understanding schema versioning principles. Writes idempotent UP/DOWN migrations, adds tables and columns with proper data types and constraints.
Independently designs schemas and optimizes queries with database migrations. Understands indexing and query execution plans. Uses diesel/sea-orm effectively.
Develops complex migrations for Rust services: zero-downtime ALTER through adding nullable columns, backfill scripts in Rust through SQLx, separating migrations into deploy-safe and post-deploy. Ensures backward compatibility between schema and application versions.
Designs migration strategy for Rust microservice platform: unified tooling (refinery vs sqlx migrate vs diesel_migrations), migration testing in CI. Develops workflow for coordinating schema changes between teams with automated backward compatibility verification.
Database Optimization 3
▼
Understands connection pooling in Rust: knows deadpool and bb8 crates for async connection pooling, can configure pool size through builder pattern. Understands how Rust ownership ensures safe connection return to pool.
Optimizes connection pooling in Rust: configures sqlx pool with connection lifecycle management, implements health checking through deadpool Manager trait, applies connection recycle policies. Monitors pool utilization through tracing spans and custom metrics.
Designs connection management for Rust services: implements read/write pool separation with custom routing, optimizes pool for high-concurrency through lock-free checkout, designs connection warming and graceful drain. Benchmarks pool overhead for minimal latency impact.
Standardizes connection management for Rust platform: creates internal crate with standard pool setup, designs connection proxy for multi-database routing. Defines pool sizing strategy based on tokio runtime threads and database capabilities.
Creates basic PostgreSQL indexes for Rust applications, understanding the connection between query types in SQLx/Diesel and required indexes. Uses EXPLAIN to analyze query plans and adds B-tree indexes for frequently used WHERE conditions.
Independently designs schemas and optimizes queries with database indexing. Understands indexing and query execution plans. Uses diesel/sea-orm effectively.
Designs indexing strategy for Rust services: partial indexes for filtered queries, GIN for JSONB fields (serialized through serde), covering indexes for frequently queried column sets. Analyzes performance through pg_stat_user_indexes and criterion benchmarks.
Develops PostgreSQL indexing standards for Rust platform: automated analysis through custom Rust CLI utilities, monitoring unused indexes. Defines indexing strategies for high-load tables considering write amplification and VACUUM processes.
Optimizes simple SQL queries in Rust applications by analyzing EXPLAIN output and avoiding N+1 problems when loading related data. Uses batch queries through SQLx query_as instead of loop calls and adds pagination through LIMIT/OFFSET.
Independently designs schemas and optimizes queries with query optimization. Understands indexing and query execution plans. Uses diesel/sea-orm effectively.
Optimizes complex PostgreSQL queries in Rust services: CTEs for readability, window functions, lateral joins. Profiles execution time through SQLx tracing integration, applies prepared statements and optimizes result deserialization through zero-copy where possible.
Designs query optimization strategy for Rust platform: query builder abstractions with automatic EXPLAIN logging, materialized views for aggregations. Develops custom SQLx middleware for slow query tracing and automated alerting.
Distributed Tracing 1
▼
Integrates OpenTelemetry into Rust services through opentelemetry-rust SDK: basic tracer setup, sending traces through OTLP exporter. Understands span and trace context concepts and linking traces with tracing crate through tracing-opentelemetry.
Configures OpenTelemetry for Rust microservices: automatic HTTP instrumentation through tower middleware, distributed tracing with context propagation (W3C TraceContext). Configures OTLP export to Jaeger/Tempo, sets up sampling strategies and span attributes.
Designs observability architecture on OpenTelemetry for Rust services: unified traces/metrics/logs through OTel SDK, custom instrumentation for business operations. Optimizes overhead through tail-based sampling, configures OTel Collector pipeline and integrates with service map visualization.
Defines OpenTelemetry standards for Rust platform: mandatory instrumentation for all services, shared otel crate with auto-configuration. Develops semantic conventions for business domains, configures OTel Collector fleet and defines data pipeline for traces/metrics.
gRPC 1
▼
Implements basic gRPC services in Rust through tonic, defining .proto files and using Rust code auto-generation through prost. Understands Protobuf message structure, unary RPC calls and proto type mapping to Rust structs.
Develops gRPC services on tonic with server/client streaming, interceptors for authentication and request metadata. Configures tonic-build for code generation, implements error mapping through tonic::Status and connects reflection service for grpcurl.
Designs gRPC architecture for Rust services: bidirectional streaming for real-time data, health checking through tonic-health, load balancing with tower. Optimizes serialization through prost with custom codecs and implements graceful shutdown for streaming connections.
Defines gRPC communication standards for Rust platform: schema registry for .proto files, backwards-compatible message evolution, shared crates with generated code. Develops tower middleware stack for tracing, metrics and circuit breaking in gRPC calls.
Logging 1
▼
Configures basic logging in Rust services through tracing crate: #[instrument] for functions, tracing::info!/error! for events. Understands log levels and formatting through tracing-subscriber with JSON output for production.
Implements structured logging through tracing with span hierarchy for request tracking. Configures tracing-subscriber layers: JSON for production (tracing-bunyan-formatter), pretty for dev, filtering through EnvFilter and OpenTelemetry integration.
Designs logging architecture for Rust services: custom tracing layers for sensitive data masking, dynamic log levels through tower-http, log correlation between services through trace-id. Optimizes logging performance considering zero-cost nature of tracing with disabled spans.
Defines logging standards for Rust platform: mandatory span attributes (request_id, user_id), standard format and structure, retention policies. Develops shared tracing-layer crate with automatic context enrichment and ELK/Loki integration.
Memory Management 2
▼
Understands the fundamentals of Memory Management at a basic level. Applies simple concepts in work tasks using Rust. Follows recommendations from senior developers when solving problems.
Applies Rust ownership model effectively: understands move semantics, borrowing rules, and lifetime annotations. Uses Box, Rc, Arc appropriately for heap allocation patterns. Handles interior mutability with RefCell and Mutex. Understands stack vs heap allocation trade-offs and when to use references vs owned values.
Designs zero-cost abstraction patterns in Rust: custom allocators for arena-based systems, lock-free data structures, and efficient memory layouts for cache-friendly access. Implements unsafe code safely when performance requires bypassing borrow checker. Optimizes memory footprint through enum size reduction, bitfields, and compact data representations. Mentors team on advanced ownership patterns and lifetime management.
Designs systems with optimal use of Rust ownership model: minimizing clones through lifetime annotations, Cow for lazy copying, Arc for shared ownership. Defines team standards for working with Box, Rc, Pin and managing lifetime annotations.
Understands the fundamentals of Memory Profiling at a basic level. Applies simple concepts in work tasks using Rust. Follows recommendations from senior developers when solving problems.
Independently uses DHAT, heaptrack, and Valgrind/Massif to profile Rust application memory. Understands how ownership patterns and borrow checker semantics affect allocation behavior and chooses profiling strategies accordingly.
Has deep expertise in Rust memory profiling with DHAT, heaptrack, and Massif. Optimizes allocation patterns by leveraging ownership semantics, eliminates unnecessary heap usage, and tunes borrow checker-friendly designs for production throughput.
Profiles memory consumption of Rust services through Valgrind/DHAT, jemalloc statistics and custom allocator wrappers. Analyzes allocation patterns through tracing-allocator, identifies leaks through Rc cycles and optimizes struct layout through repr(C) and field reordering.
Message Queues & Event Streaming 1
▼
Uses Apache Kafka at a basic level in actix-web/axum. Performs simple tasks using established templates. Understands basic concepts and follows team practices.
Independently implements tasks with Apache Kafka in actix-web/axum. Understands internals and optimizes performance. Writes tests with cargo test.
Implements Kafka integration through rdkafka (librdkafka binding) in Rust services, configuring producers and consumers with serde serialization. Ensures exactly-once semantics, handles errors through Result<T,E> and manages offset commits in async Tokio runtime.
Designs event-driven architecture for Rust services with Kafka: Avro/Protobuf schemas through prost, consumer groups with graceful shutdown, dead letter queues. Develops abstractions over rdkafka with type-safe message envelopes and automatic deserialization through serde.
Networking 1
▼
Understands basic networking concepts for Rust backend services — TCP/UDP socket programming, HTTP/HTTPS with hyper/reqwest, and DNS resolution. Follows team guidelines for configuring TLS in Rust services and debugging connection issues with tokio network primitives.
Works with network protocols in Rust services: TLS through rustls/native-tls, HTTP/2 through hyper, WebSocket through tokio-tungstenite. Configures connection pooling, timeouts and retry logic in reqwest/hyper clients considering backpressure.
Designs network architecture for Rust microservices: service mesh integration, mTLS between services through rustls, custom protocols on Tokio. Optimizes network performance: TCP settings (SO_REUSEPORT, TCP_NODELAY), epoll/io_uring through tokio-uring.
OOP & Design Patterns 2
▼
Understands the fundamentals of Design Patterns at a basic level. Applies simple concepts in work tasks using Rust. Follows recommendations from senior developers when solving problems.
Independently applies design patterns for Rust: trait-based strategy and visitor patterns, builder for complex struct construction, newtype pattern for type safety, state machine pattern with enums. Explains Rust-specific pattern choices considering ownership and lifetimes.
Has deep expertise in design patterns for Rust: designs zero-cost abstractions with trait objects and generics, implements type-safe state machines and builder patterns, optimizes pattern usage considering ownership and borrow checker. Mentors team on Rust-idiomatic patterns for systems programming.
Adapts classic patterns to Rust ownership model: Builder through consuming self, Strategy through trait objects (Box<dyn Trait>), Observer through Tokio channels. Forms team's library of idiomatic patterns including typestate pattern and newtype idiom.
Understands the fundamentals of OOP & SOLID Principles at a basic level. Applies simple concepts in work tasks using Rust. Follows recommendations from senior developers when solving problems.
Independently applies SOLID principles in Rust: trait-based polymorphism instead of inheritance, single responsibility in module/crate design, dependency inversion through trait objects and generics. Understands Rust-specific OOP trade-offs — composition over inheritance, trait coherence rules, zero-cost abstractions.
Applies SOLID principles in Rust's trait-based design: interface segregation with focused traits, dependency inversion through trait bounds and generics, single responsibility in module organization. Designs clean Rust architectures using trait objects for runtime polymorphism, associated types for compile-time abstraction, and newtype pattern for domain modeling.
Transforms OOP approaches into idiomatic Rust: composition over inheritance through trait composition, polymorphism through enum dispatch and trait objects. Defines standards for using generics with trait bounds vs dynamic dispatch for the team.
Optimization 2
▼
Measures Rust service latency through basic metrics: response time through tracing, P50/P95/P99 through prometheus histograms. Understands latency sources (network calls, DB queries) and applies basic optimizations (connection pooling, indexes).
Optimizes Rust service latency: minimizing allocations through stack-based buffers (SmallVec, ArrayVec), async I/O without blocking operations. Profiles through tokio-console for task scheduling analysis, optimizes serialization through zero-copy (bytes, rkyv).
Designs low-latency architecture in Rust: pre-allocated buffers through object pools, TCP tuning (TCP_NODELAY, SO_REUSEPORT), io_uring through tokio-uring. Applies lock-free data structures (crossbeam), CPU pinning for Tokio runtime and optimizes GC-free memory usage.
Defines latency optimization standards for Rust platform: SLO-based performance budgets, mandatory latency benchmarks in CI. Develops architectural guidelines for latency-sensitive services: pre-warming, connection pooling strategies and async patterns for minimal overhead.
Measures Rust service throughput through basic load testing (wrk, hey) and RPS metrics. Understands the relationship between concurrency and throughput in Tokio runtime and applies basic optimizations (batch processing, connection pooling).
Optimizes Rust service throughput: configuring Tokio worker threads, batch processing through Stream API, connection multiplexing. Applies Rayon for CPU parallelism, optimizes serialization through simd-json and configures backpressure through bounded channels.
Designs high-throughput architecture in Rust: pipeline patterns through async streams, partition-based parallelism, zero-copy I/O through splice/sendfile. Optimizes runtime: multi-runtime strategies (IO-runtime + CPU-runtime), custom task schedulers and memory-mapped I/O.
Defines throughput optimization standards for Rust platform: capacity planning based on benchmarks, automated load testing in CI through k6/gatling. Develops architectural guidelines for high-throughput services and horizontal scaling standards.
Profiling 1
▼
Uses basic CPU profiling tools for Rust: cargo bench with criterion for performance measurement, perf stat for general metrics. Understands the impact of release vs debug compilation and interprets basic benchmark results.
Profiles CPU performance of Rust services: flamegraph through cargo-flamegraph, perf record/report for hotspot analysis. Applies criterion for micro-benchmarks with statistical significance, analyzes inlining through #[inline] and optimizes hot paths.
Designs CPU profiling strategy for Rust services: continuous profiling through pprof-rs in production, DHAT for heap analysis, cachegrind for cache-miss optimization. Applies PGO (Profile-Guided Optimization) through cargo-pgo and analyzes LLVM IR for critical section optimization.
Defines performance profiling standards for Rust platform: mandatory criterion benchmarks for critical paths in CI, regression detection through cargo-bench-cmp. Develops continuous profiling infrastructure and performance budgets for latency-sensitive services.
Relational Databases 1
▼
Performs basic CRUD operations with PostgreSQL from Rust through SQLx or Diesel using type-safe queries with compile-time verification. Understands Rust type mapping to SQL types (String->TEXT, i32->INTEGER) and works with connection pools through sqlx::PgPool.
Independently designs schemas and optimizes queries with PostgreSQL. Understands indexing and query execution plans. Uses diesel/sea-orm effectively.
Develops complex PostgreSQL queries in Rust services using SQLx macros (sqlx::query_as!) for compile-time SQL validation. Configures connection pooling through deadpool-postgres, implements transactions with proper error handling and JSONB operations through serde.
Designs PostgreSQL access layer for Rust platform: choosing between Diesel (compile-time DSL) and SQLx (raw SQL with verification), migration strategies through refinery. Develops repository abstractions with generic trait Repository<T> and optimizes connection pool settings for Tokio runtime.
REST API 1
▼
Implements basic REST endpoints on Actix-web or Axum using extractors for request parsing and serde for JSON serialization. Understands HTTP methods, status codes and routing structure in Rust web frameworks.
Develops REST API on Axum/Actix-web with middleware layers (tower layers), validation through validator crate and structured error responses. Implements pagination, filtering and HATEOAS links with type-safe response structures.
Designs REST API for Rust services with idempotency, rate limiting through tower-governor and content negotiation. Implements hypermedia-driven API, configures CORS through tower-http and ensures backward compatibility with versioning through Accept headers.
Defines REST API standards for Rust platform: unified error handling through thiserror/anyhow, common tower middleware stack, OpenAPI generation through utoipa. Develops shared crates with request/response types and automated contract validation in CI.
Test Strategy 1
▼
Understands the fundamentals of property-based testing with proptest and quickcheck crates. Writes basic property tests leveraging Rust's type system for input generation. Follows team guidelines for strategy composition.
Applies property-based testing in Rust through proptest crate: generating random input data with Strategy, verifying business logic invariants. Writes shrinkable strategies for domain types and uses prop_assert! for property verification.
Develops comprehensive proptest strategies for Rust services: strategy composition for complex domain objects, stateful testing through prop_state_machine. Integrates fuzzing through cargo-fuzz and AFL for discovering unstable paths and testing unsafe code.
Defines property-based testing standards for Rust platform: mandatory proptest suites for critical business logic, CI integration with regression files. Develops shared strategy libraries for domain types and fuzzing coverage standards for unsafe code.
Type Systems 2
▼
Understands the fundamentals of Generics & Parametric Polymorphism at a basic level. Applies simple concepts in work tasks using Rust. Follows recommendations from senior developers when solving problems.
Implements Rust generics with trait bounds: writes generic functions and structs with where clauses and multiple trait bounds. Understands monomorphization and its impact on binary size vs runtime performance. Applies lifetime parameters in generic contexts ('a), combines generics with trait objects (dyn Trait) when dynamic dispatch is needed. Uses PhantomData for zero-cost type-level markers.
Designs advanced Rust generic architectures: implements GATs (Generic Associated Types) for lending iterators and async trait patterns. Builds generic type-state machines with zero-runtime-cost transitions enforced by the type system. Applies const generics for compile-time validated dimensions and buffer sizes. Designs generic trait hierarchies with supertraits and blanket implementations, optimizes trait bound complexity to maintain reasonable compile times in large generic codebases.
Designs generic APIs with complex trait bounds using where clauses, associated types and GAT (Generic Associated Types). Develops generic middleware layers for tower services and typed builder patterns with compile-time validation.
Understands the fundamentals of Type Safety & Type Systems at a basic level. Applies simple concepts in work tasks using Rust. Follows recommendations from senior developers when solving problems.
Independently applies Rust's type system for backend services — leveraging ownership and borrowing for memory safety, using enums with associated data for state machines, and applying trait bounds for generic service abstractions. Understands trade-offs between dynamic dispatch and monomorphization. Explains lifetime annotations and type-level programming to colleagues.
Has deep expertise in Rust type system — designs zero-cost abstractions with associated types and GATs, encodes business invariants using newtype patterns and typestate programming, and leverages const generics for compile-time computation. Architects type-safe async service layers with tower middleware. Mentors team on advanced lifetime patterns, unsafe code auditing, and macro-based type generation.
Designs APIs with maximum type safety: newtype patterns for domain types, phantom types for compile-time invariants, exhaustive enums instead of string constants. Implements typestate pattern for guaranteeing protocol correctness at the type level.
Web Frameworks 1
▼
Uses Rust Web Frameworks at a basic level in actix-web/axum. Performs simple tasks using established templates. Understands basic concepts and follows team practices.
Independently implements tasks with Rust Web Frameworks in actix-web/axum. Understands internals and optimizes performance. Writes tests with cargo test.
Designs solutions based on Rust Web Frameworks for production systems. Optimizes performance and scalability. Chooses between alternative approaches. Mentors the team.
Defines architectural decisions for Rust Web Frameworks at product level. Establishes standards. Conducts design reviews and defines technical roadmap.