Founding Engineer — Stealth AI Startup

TechTree; Greater London; On-site; GBP 70,000 - 120,000; Full time

Benefits offered by this job

Equity

Job summary

TechTree is seeking a Founding Engineer to build end-to-end features in London, joining an in-office team shaping an AI-driven recruitment platform. You’ll own major components from concept to production and collaborate directly with the founders.

You’ll work across frontend, backend, and infrastructure, taking ownership in a fast-paced startup. Competitive base salary plus meaningful equity is offered for a hands-on builder ready to shape early-stage products.

Qualifications

• Experience shipping end-to-end features in a product environment.
• Demonstrated ownership of large features or products.
• Proven ability across frontend, backend, and infrastructure in a startup setting.

Responsibilities

• Ship product end to end, not just tickets.
• Make architectural decisions and own features from idea to production.
• Work across frontend, backend, and infrastructure as needed.

Skills

End-to-end delivery

Ownership

Full-stack development

Startup experience

Job description

TechTree is an AI-driven recruitment platform working with high-growth companies.

When you apply, our AI Agent matches you not just to this role, but to other relevant opportunities across our network, so one application can unlock multiple roles.

Founding Engineer — build end to end, own features from idea to production. London (in-office).

Our client is a stealth AI startup building the agent layer that fixes commercial insurance — already working with 3 of the top 10 global brokers, backed by 7-figure funding from top European and American investors.

You’ll build across the stack — frontend, backend, infrastructure — and work directly with the founders.

What You’ll Do

• Ship product end to end, not just pick tickets
• Make architectural decisions and own features from idea to production
• Work across frontend, backend, and infrastructure as needed

What We’re Looking For

• Full stack engineers who’ve built real things — any language or stack
• Ownership in early-stage or resource‑constrained environments
• Startup DNA — domain knowledge is taught, figuring things out isn’t

£70,000–£120,000 base plus meaningful equity. Fully in‑office in London.

What is TechTree?

TechTree combines AI agents with a human support team to give candidates a better, more transparent hiring experience.

Our AI Agent

gets to know your background, experience, and what you’re optimising for. It continuously matches you to live roles across our network where there’s genuine alignment, not just keyword overlap.

Our Human Team

is there to support you through the process — answering questions, adding context, and making sure you’re never left guessing or ghosted.

We only post real jobs. Every role on TechTree is a live, active hire.