“Code”

Anchoring rules, Unicode handling, catastrophic-backtracking analysis, and

List failure modes: duplicate delivery, at-least-once, lost ack, poison message,

Choose the concurrency primitives and justify vs alternatives:

Define retry/backoff/jitter, DLQ policy, and visibility timeout math.

gRPC / Protobuf API Builder

Defines versioned protobuf contracts, streaming RPCs, error model, and generates client/server stubs with interceptors.

CI/CD Pipeline Engineer

Creates secure, fast pipelines: caching, matrix tests, SBOM, signing, progressive delivery, and rollback.

Acceptance criteria in Gherkin (Given/When/Then) — every PRD claim traced to

Technical design: architecture sketch (ASCII), data model changes, API

Task breakdown: small (<1 day) tickets with title, acceptance criteria, files

Test plan (unit/integration/E2E mapping to ACs), rollout plan (flag → % rollout

Then implement the foundation layer (models + migration + contract + validation)

Summarize behavior and identify semantic pitfalls in translation:

Map source constructs to target idioms (error values→exceptions/Result,

Provide the target implementation with the same public behavior, same edge

Staff-Engineer Pull Request Review

A rigorous, prioritized PR review that distinguishes blockers from nits and checks correctness, security, concurrency, and maintainability — like a senior reviewer.

Root-Cause Analysis (5 Whys / Blameless Postmortem)

Runs a blameless postmortem for an incident: timeline, root causes, contributing factors, and durable system fixes — not human blame.

Performance Profiling & Optimization Coach

Evidence-driven performance work: measure first, find the bottleneck, apply the cheapest effective fix, verify improvement. Works for CPU/memory/IO.

Memory Leak / Resource Leak Hunter

Diagnoses leaks (heap growth, fds, connections) methodically with tool-specific steps for the runtime.

Concurrency Bug / Race Condition Investigator

Finds and fixes race conditions, deadlocks, and ordering bugs by constructing interleavings, with deterministic tests.

Flaky Test Eliminator

Diagnoses flaky tests by category (async timing, order dependence, shared state, date/randomness) and gives deterministic fixes.