🚀 AI Research Engineer – LLMs & AI Agents
📍 London – Hybrid (3 days onsite, 2 days WFH)
📅 Contract until December 2025 – possible extension based on performance
We’re looking for an AI Research Engineer to join a world-leading social technology company known for building cutting-edge open-source large language models used by millions every day.
You’ll work on next-gen AI assistants — improving prompts, testing agent behavior, and fine-tuning performance — while diving deep into Python codebases and AI frameworks.
What you’ll do:
* Create, refine, and test prompts to guide AI agents toward ideal behavior
* Evaluate AI agent responses and identify failure points
* Implement and debug AI agent tool calls in a Python/PHP software stack
* Build and maintain internal benchmarks for AI agent performance
* Collaborate with researchers and engineers to improve LLM-powered agents
* Analyze results and report findings for model improvement initiatives
You bring:
* Strong Python skills (can read/write multi-file codebases)
* Working with LLM frameworks (LangChain, MCP)
* Experienced with Leetcode
* Experience with AI/ML, NLP, or generative AI research
* Curiosity, problem-solving mindset, and attention to detail
Tech Stack needed -
Languages: Python (Advanced, LeetCode-level), PHP (basic familiarity)
Databases: SQL (basic–intermediate querying & analysis)
AI/LLM Frameworks: LangChain, Model Context Protocol (MCP)
Tools: Git / source control
Concepts: Large Language Models (LLMs), prompt engineering, AI agent development
💡 This is your chance to work on AI that’s shaping the future — at a scale few companies in the world can match.