Software Development Engineer in Test

We're looking for a Senior SDET (Software Development Engineer in Test) with strong Go expertise to significantly scale our test automation coverage and build out our tooling infrastructure.

Requirements

• 3+ years of hands-on Go experience, writing clean, maintainable, idiomatic code.

• Strong understanding of Go concurrency, including building with goroutines, channels, and synchronization primitives, as well as reasoning about race conditions, deadlocks, and graceful shutdowns.

• Solid grasp of modern Go idioms, including context.Context, generics, proper error handling, and structured logging.

• Experience with gRPC, particularly streaming RPCs.

• Solid understanding of networking fundamentals, including TCP, UDP, HTTP/2, and TLS.

• Strong testing expertise, including table-driven tests, the race detector, fuzzing, and deterministic testing of concurrent code (testing/synctest).

• Performance-oriented mindset. A key goal of the test suite is to serve as a load generator capable of driving a large number of concurrent streams from a single instance, so the ability to write efficient, low-overhead Go code that performs reliably under heavy load is essential.

• Hands-on experience with profiling and performance tuning using pprof, benchmarks, and the execution tracer—not just familiarity with the concepts.

• Familiarity with Prometheus metrics and instrumentation.

• Hands-on experience using AI tools in day-to-day software development.

Nice to Have

• Experience designing and maintaining public SDKs or libraries, including Go modules, semantic versioning, and backward compatibility.

• Experience with audio stream processing.

• Familiarity with SIP and telephony systems.

Responsibilities

• Develop and maintain end-to-end automated tests using the existing Go-based framework

• Extend and improve the internal test automation framework

• Automate load testing and validation pipelines

• Contribute to and maintain the Go SDK (the library other teams and customers build against) and test suite built on top of that SDK - including load test scripts, healthchecks, etc

• In the longer term - provide automation tooling (e2e tests framework too) that can be used directly by backend developers, managers, QA, etc

• Ultimately automate everything related to testing - turning manual and ad-hoc QA work (functional, load, healthchecks, etc) into automated, CI/CD-integrated coverage

What we offer

• The team has built award-winning AI products for tech corporations — devices, voice assistants, products that are actually in the world 

• Cutting-edge tech stack: Speech Technologies, NLP, Generative AI (LLMs, diffusion models), voice-first agentic architecture with privacy-first and on-premises deployment

• High engineering bar and real ownership — the team cares about what actually works in production, not what looks good in a demo, and you'll see the impact of your work directly 

• Fast career progression — a senior-heavy team and a high volume of real problems means you grow faster than you would anywhere else 

• Startup pace with enterprise stability — real clients, real revenue, no bureaucracy 

• Fully remote across Europe

• 21 vacation days + public holidays + 5 sick days 

• Private English lessons via Preply

• Participation in Employee Stock Ownership Plan (ESOP)