Performance Test Engineer

About the Role

We’re looking for a Performance Test Engineer to design, build, and own our performance testing solution. You’ll work on a scalable performance framework, simulate real-world workloads, identify system bottlenecks, and integrate performance validation into the engineering lifecycle.

What You’ll Do

• Design and maintain performance test harnesses and load-simulation solutions from scratch.
• Build load, stress, endurance, scalability, and concurrency tests for complex web applications and backend services.
• Create realistic multi-user and high-scale scenarios using synthetic traffic and multi-client orchestration.
• Define performance baselines, SLOs, regression thresholds, and automated quality gates in CI/CD pipelines.
• Integrate performance testing with analytics and observability platforms to provide actionable insights.
• Analyze metrics, logs, traces, CPU, heap, and memory profiles to identify bottlenecks.
• Work with engineering teams to drive performance improvements and turn findings into permanent regression coverage.

What We’re Looking For

Required

• 4+ years of experience building automated test infrastructure or performance and reliability tooling for production systems with TypeScript and Node.js strongly preferred.
• Experience designing load, stress, or concurrency test harnesses from scratch, including synthetic traffic generation, multi-client orchestration, and result analysis.
• Experience with sharded or parallelized performance test execution.
• Solid understanding of web performance, including rendering and interaction latency, main-thread and event-loop contention, memory and garbage collection behavior, and the use of Chrome DevTools or V8 profilers to localize bottlenecks.
• Experience testing distributed, service-oriented backends, including gRPC microservices, PostgreSQL, and Redis or Valkey caching, and reasoning about latency under concurrent load.
• Experience using Playwright to drive real end-to-end user journeys.
• Experience with sharded or parallelized performance test execution.
• A strong quality mindset that treats flaky and non-reproducible tests as bugs and turns performance findings into permanent regression coverage.
• Experience working in a monorepo environment, ideally with Bazel.
• Hands-on experience using AI coding tools such as Claude Code, Cursor, or similar tools.
• English: Upper-intermediate (B2) +

Nice to Have

• Experience testing spreadsheet, formula, query, or reactive dependency-graph systems.
• Experience testing real-time collaboration systems using Operational Transform or CRDT.
• Experience testing rules, automation, or trigger-action workflow engines.
• Experience with performance testing tools such as k6, Gatling, Locust, or Artillery.
• Experience with observability tools such as Grafana, VictoriaMetrics, Tempo, Prometheus, or Datadog.

We offer:

• Flexible & remote job
• Paid vacation and sick leave
• Development opportunities in any IT direction
• Personal professional growth
• Up to 100% reimbursement of the participation in core courses and conferences