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Zealous Agency

Full Stack Engineer

Actively Reviewing

Zealous Agency

2–4 yrs exp Posted 3 weeks ago  · Apply by Aug 19, 2026

Mid-Level Full Stack Developer

Up to £70,000 - £90,000 + Equity

London (Hybrid - 2 days in office)


Redefining an industry that’s ripe for disruption is the aim of this legal tech startup. You’ll have the chance to join a core team and help scale an AI-powered platform that streamlines workflows.


The emphasis on this role is blending solid full stack capabilities with the chance to work directly on cutting-edge AI engineering. You’ll own features from the database to the UI, getting your ideas implemented on a product that is gaining massive traction.


It's an early-stage venture raising their seed round with an impressive leadership team. If you are a strong full-stack engineer looking to transition deeper into AI, this role offers the perfect platform to build production-grade LLM applications, work with RAG pipelines, and develop agentic workflows alongside the founders.


Key Skills & Experience:


  • Core Stack: Strong production experience with Node.js, Python, Next.js, and React
  • Databases: MongoDB and exposure to or interest in Vector databases (Pinecone, Weaviate, etc.)
  • AI & LLMs: Hands-on experience integrating LLM APIs (OpenAI, Anthropic) or building initial prototypes
  • Concepts: A solid understanding of RAG pipelines, prompt engineering, or tool usage/function calling
  • Any experience with document processing, OCR technologies, or data parsing


If you think this is the right role for you, then apply with a copy of your CV or get in touch with Ben Greensmith.