Senior Software Engineer
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Job Description
Senior AI Engineer at PubNub designing AI systems for real-time use cases. Building integrated AI features for a global data network with high scale.
Responsibilities:
- Design, build, and maintain AI-powered services integrated into PubNub’s platform
- Architect low-latency ML and LLM pipelines processing millions of messages per minute
- Build internal frameworks, APIs, and tooling for AI feature adoption
- Train, fine-tune, and operate models in production
- Develop and maintain infrastructure for running LLMs at scale
- Extend existing backend and client systems to support AI features
- Collaborate with product and engineering teams on system design and trade-offs
- Improve developer experience through clean APIs, SDKs, and documentation
Requirements:
- 5+ years of software engineering experience
- 1+ year of hands-on experience with AI/ML systems in production
- Experience shipping customer-facing AI features
- Experience deploying and scaling LLMs in production
- Experience working with high-throughput systems (millions of messages/minute)
- Strong knowledge of TypeScript, Python, or Rust
- Solid system design and backend development skills
- Regular use of AI-assisted development tools (Copilot, Cursor, Claude, etc.)
- Fluent English
Benefits:
- Open paid time off
- Stock options
- Optional office in central Katowice
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