Domain
Performance Engineering
Skill Profile
Throughput optimization: concurrency, batching, async I/O, scaling
Roles
6
where this skill appears
Levels
5
structured growth path
Mandatory requirements
15
the other 15 optional
Performance Engineering
Optimization
3/17/2026
Choose your current level and compare expectations. The items below show what to cover to advance to the next level.
The table shows how skill depth grows from Junior to Principal. Click a row to see details.
| Role | Required | Description |
|---|---|---|
| Backend Developer (Rust) | 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). | |
| Compiler Engineer | Knows basic throughput optimization concepts for compiler engineering and can apply them in common tasks. Uses standard tools and follows established team practices. Understands when and why this approach is used. | |
| Game Server Developer | Measures basic server throughput metrics such as tick rate and messages processed per second. Identifies obvious bottlenecks in player message handling loops. Uses profiling tools to detect frame budget overruns and applies simple batching for entity state updates to reduce per-tick overhead. | |
| Performance Testing Engineer | Measures throughput: RPS per endpoint, transactions per second. Finds saturation point through ramp-up tests. Understands the relationship between throughput and latency. | |
| Systems Programmer (C/C++) | Measures system throughput using standard benchmarking tools and identifies basic I/O bottlenecks. Understands the difference between blocking and non-blocking I/O patterns. Applies simple batch processing techniques to reduce syscall overhead and experiments with buffer sizing to improve data transfer rates in straightforward pipeline scenarios. | |
| Telecom Developer | Monitors basic call processing rate metrics and signaling message throughput using standard telecom monitoring tools. Identifies simple bottlenecks in SIP message handling and media stream setup paths. Applies configuration tuning for thread pools and connection limits to improve call setup rates under normal traffic conditions. |
| Role | Required | Description |
|---|---|---|
| Backend Developer (Rust) | 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. | |
| Compiler Engineer | Confidently applies throughput optimization for compiler engineering in non-standard tasks. Independently selects optimal approach and tools. Analyzes trade-offs and suggests improvements to existing solutions. | |
| Game Server Developer | Optimizes game server tick rate by restructuring entity update pipelines and implementing efficient message batching for player state synchronization. Profiles and reduces per-tick allocation pressure. Designs prioritized message queues that maximize player update throughput while maintaining consistent frame timing under moderate player loads. | |
| Performance Testing Engineer | Optimizes throughput: horizontal scaling validation, batching effectiveness, connection pool sizing. Tests: saturation point, throughput under degradation. | |
| Systems Programmer (C/C++) | Implements zero-copy I/O techniques and lock-free data structures to eliminate contention in high-throughput data paths. Profiles kernel-to-userspace transitions and reduces syscall frequency through batching. Tunes NUMA-aware memory allocation and applies ring buffer patterns to achieve predictable throughput under sustained load across multiple processing cores. | |
| Telecom Developer | Optimizes signaling message throughput by implementing efficient SIP transaction state machines and reducing per-message memory allocations. Tunes media stream capacity by configuring RTP multiplexing and jitter buffer strategies. Profiles call processing pipelines to eliminate redundant codec negotiations and achieves higher concurrent call density per server instance. |
| Role | Required | Description |
|---|---|---|
| Backend Developer (Rust) | Required | 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. |
| Compiler Engineer | Expertly applies throughput optimization for compiler engineering in designing complex systems. Optimizes existing solutions and prevents architectural mistakes. Conducts code reviews and trains colleagues on best practices. | |
| Game Server Developer | Required | Architects high-throughput game server systems capable of processing thousands of player messages per tick with minimal latency. Implements spatial partitioning and interest management to reduce entity update volumes. Designs adaptive tick rate systems and delta compression schemes that scale linearly with player count while preserving gameplay responsiveness. |
| Performance Testing Engineer | Required | Designs throughput testing: capacity benchmarking, scalability testing (linear vs sublinear), cost-per-transaction analysis. Models throughput growth. |
| Systems Programmer (C/C++) | Required | Designs kernel-bypass architectures using DPDK or io_uring for line-rate packet processing. Builds lock-free queue systems that scale across NUMA nodes with minimal cache-line bouncing. Implements custom batch processing engines with adaptive coalescing that dynamically balance latency against throughput based on load profiles and hardware topology constraints. |
| Telecom Developer | Required | Architects high-capacity call processing systems handling tens of thousands of concurrent sessions with sub-millisecond signaling latency. Designs sharded signaling architectures that distribute SIP transaction load across clusters. Implements media stream optimization with hardware-accelerated transcoding and adaptive bitrate management to maximize channel capacity per chassis. |
| Role | Required | Description |
|---|---|---|
| Backend Developer (Rust) | Required | 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. |
| Compiler Engineer | Establishes throughput optimization standards for the compiler engineering team and makes architectural decisions. Defines technical roadmap considering this skill. Mentors senior engineers and influences practices of adjacent teams. | |
| Game Server Developer | Required | Defines server throughput targets and SLAs for tick rate stability across game modes. Leads design of distributed entity update architectures that scale horizontally. Establishes performance budgets per system, drives adoption of message batching and compression standards across teams, and mentors engineers on profiling methodologies for sustained high-throughput operation. |
| Performance Testing Engineer | Required | Defines throughput standards: capacity targets, scaling efficiency metrics, cost budgets. Coordinates capacity planning with infrastructure. |
| Systems Programmer (C/C++) | Required | Defines Throughput Optimization strategy at team/product level. Establishes standards and best practices. Conducts reviews. |
| Telecom Developer | Required | Establishes call processing rate targets and signaling throughput SLAs aligned with carrier-grade requirements. Leads capacity planning for signaling and media planes, driving adoption of optimized protocol stacks across teams. Defines performance testing frameworks that validate throughput under realistic traffic models and mentors engineers on telecom-specific profiling techniques. |
| Role | Required | Description |
|---|---|---|
| Backend Developer (Rust) | Required | Shapes organizational throughput scaling strategy: data-intensive system architecture on Rust, LMAX Disruptor patterns. Defines capacity management standards, automated auto-scaling and architecture for processing millions of RPS through sharding and partitioning. |
| Compiler Engineer | Shapes throughput optimization strategy for compiler engineering at the organizational level. Defines best practices and influences technology choices beyond their own team. Is a recognized expert in this area. | |
| Game Server Developer | Required | Sets the technical vision for server throughput across the entire game platform, balancing tick rate guarantees with infrastructure cost. Drives innovation in entity update architectures, evaluates custom networking protocols, and influences industry approaches to massive-scale player message processing. Aligns throughput strategy with product roadmap and player experience goals. |
| Performance Testing Engineer | Required | Designs throughput optimization strategy: scalability architecture patterns, capacity prediction models, cost-efficient scaling. Defines throughput governance. |
| Systems Programmer (C/C++) | Required | Defines Throughput Optimization strategy at organizational level. Establishes enterprise approaches. Mentors leads and architects. |
| Telecom Developer | Required | Defines the long-term throughput strategy for telecom platforms, balancing call processing capacity with infrastructure economics at carrier scale. Evaluates emerging standards like SIP-over-QUIC for throughput gains. Drives cross-organization alignment on signaling architecture evolution and media plane modernization to support next-generation network capacity demands. |