/Founding Fullstack Engineer (React/Python/LLM)

Founding Fullstack Engineer (React/Python/LLM)

LondonRemotegbvia direct
// Job Type
Full Time
// Salary
GBP 100,000 - 120,000/year
// Salary Range
100,000–120,000 GBP / year
// Posted
9 months ago
// Work Mode
hybrid

About the Role

<p><strong>Founding Full-Stack Engineer</strong></p> <p>London | Hybrid | Backed by Tier 1 SF Investors</p> <p><strong>React, Typescript, Python, Django, FastAPI, ML, LLM, AI Agents</strong></p> <p>Neulinx is proud to be exclusively partnered with a cutting-edge AI startup that’s just secured a major funding round, backed by <strong>Tier 1 investors in San Francisco</strong>. With clients already signed across industries—including one of the UK’s fastest-growing challenger banks and other household names in financial services—this team is building something truly foundational.</p> <p>Now a tight-knit team of 10 and growing, they’re hiring <strong>two Founding Full-Stack Engineers</strong> to help shape the future of how humans and AI work together.</p> <p><strong>What they’re building</strong></p> <p>This isn’t just another SaaS tool. They’re building the operating system for hybrid human–AI workflows—a platform that enables teams to scale by orchestrating tasks across people and AI agents.</p> <p>You&#8217;ll be joining at the most exciting stage: full ownership, zero legacy tech, and the opportunity to architect something with real-world impact.</p> <p><strong>What you’ll do</strong></p> <ul> <li><strong>Own full-stack delivery</strong> – Build and ship across the stack, from polished interfaces to scalable backend orchestration.</li> <li><strong>Architect core systems</strong> – Work closely with the CTO to design infrastructure that can scale intelligently.</li> <li><strong>Embed AI into workflows</strong> – Collaborate with the ML team to bring human-AI interaction to life.</li> <li><strong>Drive product and tech strategy</strong> – As a founding engineer, your voice will shape roadmap, tech stack, and team culture.</li> <li><strong>Move fast, with autonomy</strong> – You’ll take ideas from 0 to live in weeks, not months.</li> </ul> <p><strong>What you bring</strong></p> <p><strong>Front-end:</strong></p> <ul> <li>Strong React experience (must-have), plus exposure to another framework (Vue, Typescript, etc.)</li> <li>Understanding of UX, responsive design, and frontend performance tuning</li> </ul> <p><strong>Back-end:</strong></p> <ul> <li>Python (with Django and/or FastAPI)</li> <li>Experience building and securing REST APIs</li> <li>SQL and NoSQL databases</li> <li>Cloud infrastructure and deployment experience (AWS, GCP, etc.)</li> </ul> <p><strong>Bonus:</strong></p> <ul> <li>Exposure to ML, LLMs, or agent-based systems</li> <li>Strong JavaScript/TypeScript skills across the stack</li> <li>DevOps and CI/CD understanding</li> <li>Startup/early-stage product delivery experience</li> </ul> <p><strong>Preferred (not essential):</strong></p> <ul> <li>BSc/MSc in Computer Science, Engineering, Physics, or related</li> <li>Prior experience in high-ownership technical roles</li> </ul> <p><strong>What’s on offer</strong></p> <ul> <li><strong>£100,000–£120,000</strong> depending on experience</li> <li><strong>Exceptional equity package</strong> – meaningful ownership</li> <li><strong>Private medical insurance</strong></li> <li><strong>32 days holiday + bank holidays</strong></li> <li><strong>Hybrid working</strong> – 2 days a week at their office by Liverpool Street (flexibility available for the right person)</li> </ul> <p><strong>Why this matters</strong></p> <p>This is a rare opportunity to join a high-growth, venture-backed startup at ground level—building the infrastructure layer for how companies scale in the AI era. You won’t just be writing code. You’ll be crafting a product that redefines work itself.</p> <p><strong>Ready to join?</strong></p> <p>If you&#8217;re an experienced Full-Stack Engineer, excited about transforming the future of the workplace with AI and keen to be part of a forward-thinking founding team, we’d love to hear from you. Please upload a copy of your latest CV.</p>

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