Senior Backend Developer

Description We are now expanding our team and are looking for a skilled, goal-oriented backend developer to help us grow. You'll work on services, APIs, databases, and integrations with external systems, collaborating closely with a small, hands-on, technically strong team that moves fast and makes decisions without unnecessary bureaucracy. Requirements 6+ years of production experience with Python At least 2 years of hands-on experience with async Python (FastAPI, aiohttp, or similar frameworks) in production Ability to debug issues across service boundaries Comfortable working with partially defined tasks and evolving requirements Ready to work in a fast-changing, high-uncertainty environment Open to using AI tools in daily development and troubleshooting Nice to have: experience with AI Tracing Tools like LangSmith Responsibilities Develop and maintain the internal LLM agent framework with focus on scalability, processing, and parallelism Ensure system observability and reliability using metrics, tracing and monitoring tools Adapt the framework for specific customer use cases and collaborate closely with ML/NLP teams Build and support automated LLM evaluation pipelines Design backend services using Python () and modern cloud-native architecture. 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 Company-paid subscriptions to top AI tools (ChatGPT, Claude, Cursor, and others)