Senior Backend Developer

speedapp

📍 Warsaw, Masovian Voivodeship, Poland

Full-time Computer Occupations Posted February 22, 2026

Job Description

You’ll join as a Senior Full-Stack Engineer with hands-on experience building products powered by LLMs, contributing directly to the development of our AgentSee AI platform.

RESPONSIBILITIES



  • Design, build, and scale AI-driven systems that power our virtual agent capabilities (conversational reasoning, retrieval, and automation flows)

  • Develop backend services and data pipelines that integrate multiple APIs (Amadeus, Sabre, internal systems) to support real-time decision-making

  • Collaborate with other teams to ship LLM-based features that deliver measurable impact

  • Own architecture decisions for distributed, high-performance AI applications

  • Continuously improve model performance, reliability, and monitoring frameworks

  • Help define our engineering best practices, guide technical decisions, and mentor other developers within the team

REQUIREMENTS