Senior Full-Stack Product Engineer (AI/ML) – Series A Startup

sr2 • United Kingdom

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AI Summary

Join a fast-growing AI startup as a Senior Full-Stack Product Engineer to design, build, and scale an AI-powered platform. Own end-to-end development from concept to production, integrating LLMs, AI agents, and ML solutions while shaping technical direction and solving complex business problems. Collaborate closely with founders, engineers, and product teams in a high-impact, high-growth environment.

Key Highlights

End-to-end ownership of full-stack product development, including frontend, backend, and AI/ML integration

Work at the forefront of applied AI, solving real-world business-critical problems for enterprise clients

Direct collaboration with founders and product teams to shape technical decisions and product direction

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Key Responsibilities

Design, build, and ship full-stack product features with end-to-end ownership from concept to production

Develop scalable backend services and APIs using Node.js, ensuring reliability, performance, and maintainability

Integrate large language models, AI agents, and machine learning capabilities into real-world product workflows

Solve challenging AI problems involving document processing, computer vision, data extraction, and intelligent automation

Develop systems for evaluating and improving AI performance, including prompt optimization, model fine-tuning, and automated testing

Collaborate with founders, product teams, and engineers to translate customer problems into technical solutions

Contribute to architectural decisions, infrastructure, CI/CD pipelines, and engineering best practices as the platform scales

Continuously explore emerging AI technologies to enhance product capabilities, accuracy, and performance

Technical Skills Required

TypeScript React Node.js

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Benefits & Perks

£80,000 - £130,000 annual salary + equity

Visa sponsorship available

Hybrid work model (4 days in office)

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Nice to Have

Experience with prompt engineering

Model evaluation and fine-tuning

Computer vision applications

Exposure to B2B SaaS or high-growth startup environments

Job Description

Full-Stack Product Engineer | Series A AI Startup

Central London (4 days in office

£80,000 - £130,000 + equity

Visa Sponsorship: Available

We're working with a recently Series A-funded AI startup that's building technology to transform how large organisations manage complex, business-critical operations.

The business is already seeing impressive commercial traction, securing significant enterprise contracts and attracting customers in a traditionally difficult-to-disrupt market.

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