[Hiring] Senior Backend Engineer @PubNub

Role Description

This role involves developing and integrating AI-powered features into production.

• Ship AI-powered features into production
• Integrate LLM inference, build evaluation and observability tooling, and own the full lifecycle of AI services — from quality metrics and tracing to cost and reliability
• Work with providers like OpenAI, AWS Bedrock, Azure, or open-source models
• Build & operate AI services at scale
• Design low-latency inference pipelines for high-throughput message streams
• Implement model routing, prompt and retrieval patterns (RAG), caching, batching, and fallbacks
• Enable other teams by building internal frameworks, APIs/SDKs, and tooling
• Partner with product and engineering on trade-offs between latency, cost, accuracy, and privacy
• Communicate clearly in English

Qualifications

• Experience with TypeScript, Python, or Rust
• Open to learning new programming languages

Requirements

• Experience with modern AI-assisted tools (Copilot, Cursor, Claude, etc.)

Benefits

• Long-term B2B collaboration (full-time engagement)
• Competitive monthly compensation: 26,000 – 35,000 PLN + VAT
• Remote-first within Poland
• Flexible time management focused on outcomes
• Access to modern tools and infrastructure required to perform the role effectively
• Equity participation opportunity
• Optional access to our centrally located Katowice office