Fullstack Engineer

La Fosse

London, UK

3 days ago

Apply on www.lafosse.com

Prepare application

Role details

Contract type

Permanent contract

Employment type

Full-time (> 32 hours)

Experience level

Expert

Compensation

£80,000.0 - £95,000.0

Working hours

Regular working hours

Job source

www.lafosse.com

Tech stack

JavaScript (Programming Language) Application Programming Interfaces (APIs) Agile Methodology Artificial Intelligence Amazon Web Services Computing Platforms Software as a Service Continuous Integration Database Design Web Development Python (Programming Language) PostgreSQL

+20 more

Machine Learning Node.Js Scrum Methodology Software Product Management Standard Sql Next.js Software Construction Software Engineering SQL Databases TypeScript ReactJS System Availability Large Language Models Prompt Engineering Pandas Infrastructure Automation Frameworks Functional Programming Api Design Serverless Computing Golang

Job description

Own a production, multi-tenant SaaS platform used by enterprise customers.
Design, build and scale full-stack applications using TypeScript, React, Next.js, Go, Python and AWS.
Build AI-powered features, LLM integrations, agentic workflows and automation tools.
Work directly with founders to influence product strategy, engineering direction and future hiring.
Develop cloud-native systems using AWS Serverless, Lambda, PostgreSQL, Supabase and modern API architectures.
Improve platform reliability, observability, security, performance and scalability.
Support CI/CD, Infrastructure as Code and software engineering best practices.

Tech Stack

TypeScript, React, Next.js, Node.js, Go, Python, AWS, Lambda, PostgreSQL, SQL, Supabase, API Development, AI, Machine Learning, LLMs, OpenAI, Claude, MCP, RAG, Serverless, CI/CD, Infrastructure as Code

Requirements

JavaScript
Node JS
React
Typescript, * Strong commercial experience as a Software Engineer, Full Stack Engineer, Full Stack Developer or Senior Software Engineer.
Expertise with TypeScript, React, Next.js and modern web application development.
Experience building and operating cloud platforms using AWS.
Strong SQL, PostgreSQL and database design experience.
Demonstrable experience delivering production software products.
Experience building AI features using LLM APIs, prompt engineering, agentic workflows or AI tooling.
Comfortable operating in a fast-moving startup or scale-up environment.

Nice To Have

Node.js and Go experience.
Experience with Supabase and Vercel.
RAG, MCP, AI Agents, Evaluation Frameworks and AI Product Development.
Python, Pandas and data tooling experience.
Startup, scale-up or founding engineer experience.
Interest in ClimateTech, EnergyTech, Scientific Software or Battery Technology.

About the company

I’m partnered with a high-growth deep-tech scale-up spun out of Imperial College London that’s helping accelerate the future of electrification. Backed by leading investors, they’ve built a battery software platform already used by global automotive, aviation, and industrial customers, with a Series A on the horizon and ambitious growth plans.