Mid Fullstack Engineer

La Fosse Associates; Greater London; Hybrid; GBP 60,000 - 70,000; Full time

Job summary

A tech-first sustainability company is seeking a Mid-Level Full Stack Engineer to join its high-performing team. This hybrid role requires 2 days in the London or Bristol office. The ideal candidate will have experience in JavaScript, TypeScript, React, and Node.js. You will work in a collaborative, agile environment focused on building scalable software that contributes to climate tech. The salary is competitive, ranging from £60k to £70k per annum.

Qualifications

• Strong knowledge of JavaScript and TypeScript.
• Experience working with React and Node.js.
• Proficient in building and consuming APIs.

Responsibilities

• Contribute across the stack and build new features.
• Improve existing systems in a fast-moving environment.
• Collaborate closely with engineers, product, and design.

Skills

JavaScript & TypeScript

React

Node.js

Building and consuming APIs

Strong problem-solving skills

Collaborative mindset

Job description

Overview

Mid-Level Full Stack Engineer | £60k – £70k per annum | Hybrid (2 days per week in office – London or Bristol)

A tech-first sustainability company is looking to add a mid-level Full Stack Engineer to its high-performing engineering team. You will be joining a small, highly skilled team working on modern, scalable software that’s helping to redefine the heat pump and clean energy space. This is a hands-on role where you’ll contribute across the stack, building new features and improving existing systems in a fast-moving, product-led environment.

The team operates with strong engineering principles, values clean code and collaboration, and offers engineers real ownership over their work. You’ll be comfortable working in an agile environment and collaborating closely with other engineers, product, and design.

Responsibilities

Note: The original description emphasizes hands-on development across the stack and feature improvements in a fast-moving, product-led environment. Responsibilities implied by the text include contributing across the stack, building new features, improving existing systems, collaborating with engineers, product, and design, and operating in an agile setting.

Essential Skills

• JavaScript & TypeScript
• React
• Node.js
• Experience building and consuming APIs
• Strong problem-solving skills and collaborative mindset

Desirable

• Experience working in product-focused or startup environments
• Exposure to cloud platforms (AWS/GCP/Azure)
• Interest in climate tech or impactful, real-world software

Details

This is a hybrid role, requiring 2 days per week in either the London or Bristol office. The role is open to UK-based applicants only, and you must have the right to work in the UK.

Interview process

2–3 stages, including a technical discussion and a practical/technical interview.

How to apply

If this role sounds of interest, please reply with your updated CV, and I’ll be happy to share more details.