Role Description 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. Qualifications - 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, with the ability to write efficient, low-overhead Go code that performs reliably under heavy load. - Hands-on experience with profiling and performance tuning using pprof, benchmarks, and the execution tracer. - Familiarity with Prometheus metrics and instrumentation. - Hands-on experience using AI tools in day-to-day software development. Requirements - 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. - Provide automation tooling (e2e tests framework too) that can be used directly by backend developers, managers, QA, etc. - Automate everything related to testing - turning manual and ad-hoc QA work (functional, load, healthchecks, etc) into automated, CI/CD-integrated coverage. Benefits - 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).

• Plan, analyze, design, develop, execute, and maintain manual and automated test scenarios, with a strong emphasis on mobile automation. • Review and analyze technical and functional specifications to ensure comprehensive coverage for mobile, web, and API applications. • Design, implement, and execute automated tests for mobile (iOS & Android), web, and API applications. • Define and evolve mobile automation strategies, ensuring scalability, stability, and cross-platform compatibility. • Configure and execute customer-focused test scenarios aligned with business and mobile user experience requirements. • Identify, document, track, and report defects clearly and effectively, partnering with development teams for resolution. • Ensure overall product stability, reliability, and performance, particularly in mobile environments. • Collaborate closely with Product Managers, Developers, and QA team members throughout the SDLC. • Actively support and lead test automation initiatives, including mentoring and technical guidance for other QA engineers. • Monitor test execution progress, results, and exit criteria (Definition of Done). • Support mobile automation execution in CI/CD pipelines, with and without device farms. • Automate the generation and delivery of test progress, quality metrics, and summary reports. • Define, track, and analyze quality metrics to continuously improve testing effectiveness. • Contribute to the continuous improvement of QA processes, standards, and best practices, with a strong focus on mobile quality.

• Develop and maintain automated unit, integration, and end-to-end tests. • Improve test coverage and identify quality risks across existing applications. • Leverage AI tools (e.g., Claude, Copilot) to accelerate test development and maintenance. • Troubleshoot and resolve test failures across application, infrastructure, and data layers. • Reduce flaky tests and improve CI/CD pipeline reliability. • Collaborate with engineering teams to enhance testability and confidence in production systems. • Establish scalable testing standards, tools, and best practices across multiple products.

• Develop and maintain automated unit, integration, and end-to-end tests. • Improve test coverage and identify quality risks across existing applications. • Leverage AI tools (e.g., Claude, Copilot) to accelerate test development and maintenance. • Troubleshoot and resolve test failures across application, infrastructure, and data layers. • Reduce flaky tests and improve CI/CD pipeline reliability. • Collaborate with engineering teams to enhance testability and confidence in production systems. • Establish scalable testing standards, tools, and best practices across multiple products.