Senior Full Stack Developer (.NET and React, Retail - REMOTE Working

Final date to receive applications: 19 June 2026

Department: IT

Location: London

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

The work is a mixture of greenfield and legacy projects (much like any mature organisation) using React, React Native, Typescript, C#, and MongoDB. However, our microservices approach allows us to alter the technology as appropriate.

We are looking for an experienced senior developer to join our Retail Development team. The team is responsible for custom applications on our store handheld devices, store administration and reporting via online portals, and ETL to/from our ePOS solutions.

• Minimum 6 years of solid C# in a commercial environment
• Minimum 4 years of commercial experience with React and Type Script
• Commercial experience with databases (either document or relational) and openness to working with both SQL Server and MongoDB
• Produces initial results rapidly and iterates based upon feedback
• Knowledge of microservice design principles (preferably with commercial experience)
• Effective communication skills
• Make pragmatic implementation decisions and can fail fast if an approach is not working
• Understands projects and project goals in depth
• Experience or willingness of mentoring junior members of a team
• Strong desire to create high‑quality, tested code

• React Native experience (commercial or personal projects)
• Jest, React Testing Library
• Offline‑first data synchronization using a local on‑device database (Ditto, Couchbase Mobile, Firebase, etc.)
• Has at least one subject area with deep knowledge
• Coaches / mentors more junior team members or shares knowledge with the wider team

• .Net (8.0+)
• RabbitMQ / Mass Transit
• Microservices
• Micro‑frontend
• React
• React Native
• MongoDB
• Entity Framework
• MVC
• RESTful API design / Web.
  
  API
• Azure
• Jenkins
• k8s
• Git Flow

• Competitive salary and benefits package
• Remote working
• Holiday allowance
• 50% staff discount & 25% for family and friends
• Pension scheme