Roles · Telecom Developer · Lead

What a Lead } should know

43 core skills, 58 in total. Expectations per skill, and what changes at the next level.

This page lists what a Lead } is expected to know and do, skill by skill. Core skills are the ones a manager and peers assess in a review cycle; the rest count only in self-assessment. Main areas: Programming Fundamentals, Backend Development, Database Management.

43core skills
15additional skills
12skill areas
100%at Advanced or Expert
Assess myself as Lead Full role matrix

Core skills for a Lead

Grouped by area. The label on the right is the expected depth: Awareness, Working, Advanced or Expert.

Programming Fundamentals · 7

Defines algorithmic standards for telecom team: call routing algorithm evaluation, QoS scheduling strategy reviews, protocol processing optimization criteria. Conducts reviews of algorithmic decisions in carrier-grade real-time systems.

Defines async programming standards for telecom team: non-blocking protocol processing guidelines, async call handling architecture reviews, concurrent signaling patterns. Establishes best practices for async patterns in carrier-grade telecom systems.

Defines code quality standards for telecom development team: protocol implementation conventions, real-time code review practices, signaling module architecture guidelines. Conducts reviews of carrier-grade reliability requirements. Establishes quality gates for standards compliance.

Defines data structure standards for telecom team: protocol data unit format conventions, call session state structures, network routing table designs. Conducts reviews of telecom data architecture. Establishes team guidelines for real-time data structures in carrier-grade systems.

Defines design pattern standards for telecom teams: establishes architectural review practices for protocol and signaling patterns, creates guidelines for pattern selection in real-time telecom contexts, conducts training on telecom-specific patterns for multi-standard implementations.

Defines multithreading standards for telecom teams: establishes guidelines for concurrent call processing architectures, conducts reviews of real-time signaling system designs, creates training materials on lock-free programming for telecom protocol implementations.

Defines OOP/SOLID standards for telecom team: protocol state machine class hierarchy guidelines, codec interface contracts, signaling module architecture patterns. Conducts reviews of class design decisions in carrier-grade real-time telecom systems.

Backend Development · 2

Apache Kafka Expert

Defines Kafka strategy for telecom platform: carrier-grade event processing standards, event schema governance for network data, and Kafka cluster architecture for telecom workloads. Conducts architecture reviews for event-driven telecom services. Drives adoption of event streaming for network analytics and automation.

Redis Expert

Defines Redis caching strategy for telecom service platforms — establishes standards for subscriber session state management, CDR buffering policies, and network topology cache refresh. Conducts design reviews and defines technical roadmap for carrier-grade caching infrastructure.

Database Management · 1

PostgreSQL Expert

Defines PostgreSQL data strategy for telecom products: establishes standards for CDR storage and subscriber data management, designs database architecture for telecom platform scaling, drives adoption of PostgreSQL best practices for telecommunications workloads.

API & Integration · 3

Defines gRPC API strategy for telecom network management platforms — establishes proto governance for 3GPP-aligned service contracts, designs versioning policies for network function APIs, and coordinates standardized streaming patterns for telemetry and configuration services.

Defines API strategy for telecom platforms at product level: carrier-grade API standards, telecom service API governance, real-time notification API policies. Conducts API architecture reviews for telecom platform services.

Defines WebSocket strategy for telecom platform. Establishes carrier-grade connection management standards, telecom protocol integration requirements, and SLA targets for real-time services. Conducts architecture reviews for WebSocket-based telecom services. Drives adoption of WebSocket for modern telecom APIs (CAMARA, Network-as-a-Service).

Cloud & Infrastructure · 3

Docker Expert

Defines Docker infrastructure strategy for telecom: carrier-grade container orchestration standards, real-time networking container governance, telecom service container lifecycle policies. Conducts architecture reviews for containerized telecom infrastructure and optimizes FinOps for telecom workloads.

Defines Kubernetes infrastructure strategy for telecom-grade network function deployments across 5G and edge environments. Establishes IaC standards for CNF lifecycle management, carrier-grade high availability, and multi-vendor interoperability. Conducts architecture reviews and optimizes FinOps for telecom compute infrastructure.

Defines network infrastructure strategy for carrier-grade telecom platforms spanning 5G, IMS, and enterprise services. Establishes IaC standards for network function deployment, traffic engineering, and service chain orchestration. Conducts architecture reviews of network designs and optimizes FinOps for telecom network infrastructure.

Testing & QA · 3

Defines integration testing strategy for carrier-grade telecom platforms spanning network functions and service orchestration layers. Establishes quality standards for inter-operator interface testing and regulatory compliance verification. Implements shift-left testing culture with early protocol specification validation and automated interoperability testing across vendor equipment.

Load Testing Expert

Defines load testing strategy for telecom platform. Establishes carrier-grade performance validation standards, certification test requirements, and capacity planning governance. Conducts reviews of telecom performance testing approaches. Drives adoption of automated performance validation for telecom services.

Unit Testing Expert

Defines testing strategy at product level for telecom systems: protocol conformance testing standards, carrier-grade reliability testing governance, load testing frameworks for call processing. Establishes shift-left testing culture with automated quality gates for telecom software releases.

Security · 1

Leads network security strategy for the telecom development team: defines security standards for all network protocol implementations, establishes secure-by-default configurations for SBC and firewall deployments, and coordinates with NOC on incident response procedures. Drives team adoption of automated network security testing and ensures compliance with telecom security regulations (3GPP, GSMA).

AI-Assisted Development · 2

Defines ChatGPT/Claude adoption strategy for telecom development teams. Establishes standards for AI-assisted protocol implementation, automated conformance testing, and prompt engineering for network function development. Conducts reviews of AI integration patterns ensuring carrier-grade quality and regulatory compliance.

Defines GitHub Copilot strategy for telecom teams: establishes guidelines for AI-assisted protocol implementation, designs compliance validation for AI-generated telecom code against standards, drives Copilot adoption with focus on specification accuracy and certification requirements.

Observability & Monitoring · 4

OpenTelemetry Expert

Defines product observability strategy for carrier-grade telecom platforms with OpenTelemetry. Establishes SLO-based approach for five-nines service availability. Coordinates network incident management with NOC teams. Optimizes MTTD/MTTR for carrier-scale service disruptions.

Defines observability strategy for telecom products with Prometheus & Grafana: establishes SLO-based approach for telecom service quality metrics, coordinates telecom incident management, optimizes MTTD/MTTR for signaling and media processing incidents.

Defines product observability strategy for carrier-grade telecom platforms — establishes SLO-based approach for five-nines service availability, coordinates network incident management with NOC teams, and optimizes MTTD/MTTR for carrier-scale service disruptions. Drives carrier-grade reliability culture.

Defines observability strategy for telecom products: establishes SLO-based approach for telecom service quality (call completion, latency), coordinates incident management for telecom platform outages, optimizes MTTD/MTTR for signaling and media processing incidents.

Version Control & Collaboration · 2

Code Review Expert

Defines code review strategy for telecom team: protocol compliance review standards, real-time code review governance, carrier-grade reliability review practices. Establishes review culture for telecom code quality and standards compliance.

Git Advanced Expert

Defines Git strategy for telecom development teams: establishes branching standards for multi-standard protocol development with certification tracking, designs repository architecture for regulatory compliance artifacts, drives adoption of Git-based release management for telecom platform components.

Networking & Telecom · 13

Defines 5G Core Network strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

Defines BGP / OSPF Routing strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

DNS Deep Dive Expert

Defines DNS Deep Dive strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

Defines HTTP/2 and HTTP/3 QUIC strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

Defines Load Balancer Deep Dive L4/L7 strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

Defines Signaling Protocols strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

Defines Software-Defined Networking strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

Defines TCP/IP Deep Dive strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

Defines Telecom Billing Systems strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

Defines VoIP / SIP Protocol strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

WebRTC Expert

Defines WebRTC strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

Performance Engineering · 2

Defines latency optimization strategy for telecom platform. Establishes latency SLA targets aligned with 3GPP/ITU-T standards. Conducts architectural reviews of signaling and media processing paths. Creates performance testing frameworks for carrier-grade latency validation and compliance certification.

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.

Additional skills

Not assessed by the team, but part of the self-assessment and the development plan.

API DocumentationAWSCursor IDEDatabase IndexingE2E TestingGitHub Actions / GitLab CIGraphQL DesignJWT / OAuth2 / OIDCOWASP & Application SecurityPrompt Engineering for CodeQuery OptimizationSecure Coding PracticesSystem Design FundamentalsTerraformType Safety & Type Systems

What changes at Principal

0 skills get a higher expectation or become core when moving from Lead to Principal. The biggest jumps first.

See the Principal page →
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} in the open competency matrix: 58 skills across 5 levels. The matrix is free for individuals and stays free.