Full Stack Developer (Next.js / React / TypeScript)

Animal

City of Westminster

Hybrid

GBP 70,000 - 95,000

Full time

14 days+

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Benefits offered by this job

Hybrid working (3 days in office, 2 at

Holiday allowance

Pension scheme

Staff discount

Job summary

Mountain Warehouse is seeking a skilled Full Stack Developer (Next.js/React/TypeScript) to join our London-based IT team. The role focuses on modern web applications, performance, and scalable architectures across microservices, with a mix of green-field and legacy projects.

You will work on Next.js and React front-ends, collaborate with backend services, APIs, and other technologies, and contribute to code reviews, testing, and continuous delivery in a hybrid setup with 3 days in the London

Qualifications

3+ years of commercial software development in a full-stack environment.

Responsibilities

Develop and deploy production-grade applications using Next.js, React and TypeScript.

Skills

3+ years experience

Next.js

React

TypeScript

App Router

Server Components

Client Components

Render performance

API integration

Git workflows

Effective communicator

Pragmatic problem solver

Tools

MongoDB

SQL Server

Docker

Kubernetes in Azure

Vercel

Jenkins / BitBucket Pipelines

RabbitMQ / MassTransit

Microfrontends

Test Driven Development

RESTful API design

GraphQL APIs

Integrations with third-party APIs

Job description

Full Stack Developer (Next.js / React / TypeScript)

Application Deadline: 30 September 2026

Department: IT

Employment Type: Permanent - Full Time

Location: London

Description

At Mountain Warehouse we understand that technology is core to our success as a business and so we invest heavily in our in-house team. The development department is divided into product-based teams, all using variants on Kanban for project prioritisation and a focus on continuous delivery, mostly with usage of microservices.

We are a collaborative team with a strong culture of code review, occasional usage of pair programming and lots of unit tests. We're keen to write code following best practice and to continuously find ways that we can be even better. The work is a mixture of green-field and legacy projects (much like any other mature organisation) mostly using Next.js, React, TypeScript, C#, MongoDB and SQL Server, with a combination of monolithic and microservices architectures.

Key Responsibilities

We are looking for a technically strong Next.js Full Stack Developer to join the Web Development team. This role is for somebody with deep commercial experience of Next.js and modern React development who enjoys solving difficult technical problems and understands how modern web applications behave in production, particularly around rendering, caching, performance, application architecture and framework evolution.

Whilst the focus of the role is our Next.js applications, we work across a broader full-stack environment and would expect successful candidates to contribute more widely over time, working with backend services, APIs, integrations and other technologies across our platform.

We would like to meet someone who is

3+ years of commercial software development experience within a full-stack environment.
Proven experience building and deploying production applications using React, TypeScript and Next.js (App Router).
Strong understanding of modern Next.js architecture, including Server Components, Client Components, routing and data-fetching approaches.
Good understanding of rendering, caching and performance considerations in modern Next.js applications.
Able to make informed implementation decisions around rendering, caching and server-side behaviour, and diagnose issues in complex web applications.
Experience integrating frontend applications with APIs and backend services.
Understands the difference between React concerns, Next.js concerns, application concerns and service concerns.
Experience with modern Git workflows and collaborative software development practices.
Effective communicator who understands project goals and can explain technical decisions clearly.
Pragmatic problem solver with a strong desire to create high-quality, tested code.

Whilst deep expertise in Next.js, React and TypeScript is important for this role, you'll also be working within a broader full-stack environment. Let us know what you have experience of; we can train in the rest.