TechTree · Senior Software Engineer · London

One application. Five-plus roles. Best UK engineers only.

Apply once, matched across small London teams with senior scope.

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What these roles look like

Recent placements

Founding Product EngineerHelmGuard
Lead Data Platform EngineerRelativity
Senior Backend EngineerKick

Open roles

HelmGuard — Founding Product Engineer

On-site · London (King's Cross)Top-decile London pay + EMI equityEF / Sequoia Scout backed

Seed-stage AI security startup. Founders ex-Palantir, Oxford, Stanford, ETH. You own the whole product surface — UI, API, and the AI-agent features between.

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6+ yrs small fast team, TS preferreddecided/built/shipped track recordClaude Code daily

Shipped-and-used work over years; daily AI-coding-tool use expected, not a bonus.


Dominus — Senior Software Engineer

Hybrid · London£75K–£110K~£3bn portfolio, first eng seat

AI-driven real estate developer. First proper engineering hire — take internal MVPs to production and weave LLMs/agents into real business processes.

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4–6 yrs production, ideally startupfull-stack (SQL, backend, frontend)LLMs/agents in real workflows

First proper engineering hire — high autonomy, AI woven into real processes, not experiments.


Model ML — Senior Backend Engineer

On-site · London£140K–£170K + equity~$75M raised · YC + top-tier VCs

AI-native workspace for investment banking, PE, consultancies and asset managers — "Cursor for finance." Repeat-YC-exit founders; New York, London and Hong Kong.

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7+ yrs backendexpert Python + FastAPIPostgreSQL, Azure/AWS/GCP

Reports to the founders; 7+ years is the bar; financial data at scale a strong plus.


Model ML — Full-Stack Engineer

On-site · London£100K–£175K + equitySecond role, same company

Same company as above, two open roles. Own features end to end across the stack of an AI-native product live at major financial institutions.

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5+ yrsReact/Next.js + PythonDocker/K8s, CI/CD, Redis

Product-minded full-stackers who ship; repeat-YC-exit founders.


Looking for something more frontend? If you've worked at a design-led, product-first company before, this next one's for you — different location, same bundle.

Wordware — Senior Frontend Developer

Not London
On-site · San Francisco$180K–$240K + equity$30M seed · Spark, Felicis, YC

AI-native team building a personal AI assistant for knowledge workers — "Cursor for knowledge work." 12–14 people. Own the whole frontend surface.

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4+ yrs frontendportfolio of shipped production appsUS work auth or O-1 eligible

Portfolio and shipped craft over years. For someone with real design sense tired of waiting on a design queue.


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