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September 17, 2026
Senior/Lead Backend Engineer (AI / HR Tech)
Senior • Hybrid • Remote
54,000 - 72,000 EUR/yr
Bratislava, Slovakia
Apply now
Quick Facts
Role: Senior/Lead Backend Engineer (AI / HR Tech)
Work style: Full-time, remote-first
Focus: AI intelligence layer backend for HR workflows
Description
You’ll design and build the Python/FastAPI backend behind an AI-assisted HR intelligence layer that runs in production. The work includes integrating LLM-powered agents (OpenAI/Anthropic), experimenting with MCP integrations, and turning model capabilities into reliable product features with strong performance and failure handling. You’ll also design APIs that connect the intelligence layer with core HR data services and the frontend.
Responsibilities
Build the core Python/FastAPI backend that powers AI-assisted HR workflows
Put LLM APIs into production with reliable behavior, evaluation, and latency/token-budget controls
Design APIs linking the intelligence layer, HR platform, data services, and frontend
Collaborate with product and design to ship features that make HR work faster
Define standards for clean code, performance, and data security as the system scales
Requirements
Deep Python expertise; experience with async frameworks such as FastAPI or Flask
Strong PostgreSQL experience, including designing/evolving production data models
Experience building RESTful APIs that power real, used products
Interest in AI agent design, prompt orchestration, and workflow automation (not just prompt glue)
Clean architecture mindset and ability to think about system evolution
Proactive ownership and strong communication in a fast-moving environment
Not a match for candidates whose AI experience is only demos/prompt glue or for ML researchers seeking a research-only role
Benefits
Autonomy, visibility, and meaningful product impact with a small senior team
Time for learning, innovation, and career growth
Remote work, home office support, flexible hours, sick days, extra holiday
Education budget, team-building, and supportive team culture
Tools provided (laptop) and additional perks (e.g., Multisport card)
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