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AI Engineer

TechTree's client
Seed
Salary
£100k – £200k
Work mode
Remote
London, United KingdomRemotePosted 11 weeks ago

What we're looking for

  • Experience building production systems
  • Experience with AI and backend systems in Python
  • Experience with LLM-powered systems
  • Hands-on experience training models
  • Ability to operate in ambiguity and translate goals into systems

About the role

You will build the systems that make this company's product meaningfully useful to lawyers: agents, extraction tools, and controllers that automate repetitive work and reliably execute delegated tasks. At a high level, we are building a Cursor-like experience for legal documents and legal research, where an agent can search, reason over sources, and propose or apply edits while the lawyer stays in control. This is an engineering-first applied AI role. To succeed, you’ll need to understand the full product surface (editor, retrieval, dashboard workflows), so you can spot where an agent should be given control and ship it end-to-end.

What you’ll build:
- Document editing: An agent proposes changes and generates/applies patches to DOCX documents, built for legal reality: multiple collaborators, tracked changes, strict formatting, and high expectations for correctness.
- Search & retrieval: When a lawyer asks “search legislation” or “find similar contracts in our database,” the agent decomposes that into targeted queries, retrieves the right sources, and grounds outputs with citations.
- Deep research workflows: Solving legal problems requires iterative investigation, where agents make progress step by step while keeping their active context focused and manageable.
- Training models: Fine-tuning models becomes a necessity to optimize the above workflows. As internal data matures, the agent can learn from past interactions to become more intelligent.

Compensation & benefits

Competitive salary
Meaningful equity
Unlimited budget for AI coding agents and tools
Annual company offsite in Mallorca
Regular team gatherings in offices
Remote work between GMT-5 and GMT+1. You can also choose to work from offices in London or New York.

Equity details

Type: equity
Details: Meaningful ownership: Competitive salary and meaningful equity, with real responsibility and impact from day one.

About TechTree's client

This company is building the next generation of legal services. They’re an AI-native law firm, built from day one around AI and data. Legal is a trillion-dollar global industry that still operates as if software never happened. Lawyers spend too much time on low-leverage work and too little on judgment, reasoning, and outcomes. AI is now rapidly realigning what’s possible. They believe AI doesn’t replace legal judgment - it replaces the operating model around it. Firms that rebuild around this shift will define the next era of legal services; others will struggle to justify their costs as AI reshapes client expectations. They started in April 2025 and raised a $2M pre-seed followed by an $7M seed led by a tier-1 US VC. Their product is used daily by their own lawyers on real cases, creating a tight feedback loop between product and practice. With early customers and a world-class engineering team taking shape, it’s still day one - come build with them.

Seed

Funding

Total funding: $9M
Last round: $7M · seed

Investors

tier-1 US VC

Team

  • founders
  • a small group of senior engineers

Ready to apply?

Submit your application today.

AI Engineer
£100k – £200k