Founding SDET - Test Infrastructure

Responsibilities:

• Design and build end-to-end test infrastructure for zaimler's backend services, APIs, and data pipelines.
• Own performance and load testing: define benchmarks, build harnesses, and establish baselines for latency, throughput, and resource consumption under production-realistic conditions.
• Build and maintain integration test suites that validate correctness across the full stack, from data ingestion through knowledge graph construction to inference endpoints.
• Develop automated regression and smoke test pipelines integrated into CI/CD, ensuring every deploy is validated before it reaches enterprise customers.
• Identify reliability risks early by instrumenting systems, analyzing failure modes, and building chaos/fault-injection tests for critical paths.
• Collaborate directly with infrastructure and ML engineers to define testability requirements for new systems before they're built, not after.

Requirements:

• 4+ years of experience in software engineering, test engineering, or a related role.
• Strong software engineering fundamentals: you write production-grade code, not just test scripts.
• Deep experience with backend and API testing: REST/gRPC, async workflows, distributed systems.
• Hands-on experience building performance and load testing frameworks (e. g., Locust, k6 Gatling, or custom tooling).
• Proficiency in Python; familiarity with Go or Java is a plus.
• Experience with CI/CD pipelines (GitHub Actions, Jenkins, or similar) and containerized environments (Docker, Kubernetes).
• Understanding of data pipeline testing, validating correctness, consistency, and completeness across ETL or streaming systems.

Nice-to-haves:

• Experience testing graph databases, knowledge graphs, or semantic/ML inference systems.
• Familiarity with observability tooling (Prometheus, Grafana, Datadog) and using metrics to drive test strategy.
• Background in infrastructure-as-code and environment provisioning for test environments.
• Experience at a startup or early-stage company where you built testing practices from scratch.