Senior Full Stack Engineer – AI Platform
£90k - £120k + Equity
React and Node on AWS
Fully Remote
We’re hiring on behalf of a well-funded AI-first startup building the next generation of LLM-powered agents that are transforming enterprise customer experience. They are pioneering empathetic, agentic workflows across chat, voice, and messaging channels.
They’re now looking for a Senior Full Stack Engineer to join their small, high-calibre team. If you’re excited by AI-powered products, high ownership, and working on meaningful real-world problems.
Key Responsibilities
🧱 Full-Stack Product Engineering
* Design, build, and maintain scalable features across the frontend, backend, and infrastructure
* Contribute to an AI-first platform integrating large language models (LLMs) into enterprise workflows
* Develop and optimise performant, well-tested microservices using Node.js, TypeScript, and PostgreSQL
* Build intuitive UIs in React, collaborating closely with Design and Product
🚀 Platform, Scale & Infrastructure
* Optimise APIs and system architecture for speed, security, and scale
* Take a DevOps-first approach to AWS (Fargate, Lambda, EC2, SQS, etc.)
* Contribute to continuous delivery with GitHub Actions and modern CI/CD practices
* Improve developer tooling and observability across the stack
🤝 Team & Culture
* Collaborate closely with other engineers, product managers, and leadership
* Participate in shaping the product roadmap and engineering direction
* Share knowledge, mentor others, and help foster a fast, pragmatic, and open team environment
About You
* 7+ years of experience in software engineering, ideally across both frontend and backend (30/70 or 70/30 is fine 😀)
* Strong in Node.js, TypeScript, Express, and React
* Experience with AWS cloud infrastructure and PostgreSQL/Redis
* Product mindset, you think in terms of outcomes, not just features
* Comfortable in fast-paced, early-stage startup environments
* Experience in building microservices and distributed systems
* Strong communicator with a collaborative, solution-focused approach
Bonus Experience
* Exposure to LLM APIs, AI tooling, or NLP-powered applications
* Knowledge of Next.js or modern frontend architecture
* Infrastructure-as-Code (CDK, Terraform, etc.)
* Experience in customer support tech or event-driven systems
* Python scripting or backend services alongside JS stack
What’s on Offer
💸 Compensation & Perks
* Salary: £85k–£120k DOE
* Equity or stock grants
* Learning and AI tooling budgets (Perplexity Pro, ChatGPT Pro, Claude Pro)
🌱 Culture & Flexibility
* Fully remote
* Flexible time off
* Async-friendly, autonomous environment
* Small, senior team where your voice counts
* Build something meaningful from the ground up
* No coding interview or take-home, paid work trial after 2 interviews with engineering leaders at times that work for you 👍
If you want to write code that solves an interesting problem at scale at a company, all in on AI first, I would love to speak to you.