Senior Developer

Ronald James; Newcastle upon Tyne; On-site; GBP 45,000 - 55,000; Full time

Job summary

Ronald James is seeking a Senior Developer to join the Newcastle upon Tyne team and help design and implement a next-generation platform using TypeScript, React, Node.js and React Native/Expo. You will apply Clean Architecture and Domain-Driven Design principles, contribute to a modern cloud-based stack, and mentor junior engineers in best practices.

The role emphasizes independent work, high-quality, testable code, and close collaboration with product to shape requirements and deliver scalable

Qualifications

• Strong experience with TypeScript, React, Node, or similar modern stacks.
• Interest in Clean Architecture and Domain-Driven Design.
• Commitment to clean, maintainable code.
• Product-focused mindset and understanding of the user and the problem.
• Self-starter attitude with the ability to work independently.
• Experience with Kubernetes, CI/CD, or broader DevOps tooling.
• Exposure to React Native / Expo.
• Experience contributing to re-platforming or system-modernisation projects.

Responsibilities

• Design and build new services and features for a next-generation platform.
• Apply clean, scalable engineering principles, including Clean Architecture and Domain-Driven Design.
• Write high-quality, testable code with strong testing discipline, with TDD encouraged.
• Work closely with product to shape requirements and propose effective solutions.
• Support the migration away from legacy systems.
• Mentor mid-level and junior developers in best practices.
• Operate within a team-led model where initiative and ownership are valued.

Skills

TypeScript

React

NodeJS

Clean Architecture

Domain-Driven Design

Test-driven development

Self-starter

Product-focused mindset

Tools

Kubernetes

CI/CD

DevOps tooling

Job description

Salary: £38,000 - 78,000 per year

Requirements:

• Strong experience with TypeScript, React, Node, or similar modern stacks
• Interest in Clean Architecture and Domain-Driven Design
• Commitment to clean, maintainable code
• Product-focused mindset and understanding of the user and the problem
• Self-starter attitude with the ability to work independently
• Experience with Kubernetes, CI/CD, or broader DevOps tooling
• Exposure to React Native / Expo
• Experience contributing to re-platforming or system-modernisation projects

Responsibilities:

• Design and build new services and features for a next-generation platform
• Apply clean, scalable engineering principles, including Clean Architecture and Domain-Driven Design
• Write high-quality, testable code with strong testing discipline, with TDD encouraged
• Work closely with product to shape requirements and propose effective solutions
• Support the migration away from legacy systems
• Mentor mid-level and junior developers in best practices
• Operate within a team-led model where initiative and ownership are valued

Technologies:

• CI/CD
• Cloud
• DevOps
• Support
• Kubernetes
• React
• React Native
• TDD
• TypeScript
• NodeJS
• DDD
• JavaScript

More:

We are a technology-led business modernising and digitising complex operational workflows through a brand-new platform build. We are streamlining processes, improving user experience, and replacing long-standing systems with a more efficient, scalable solution. We are entering a major transformation phase, rebuilding our platform from the ground up using modern architecture. This is a permanent Senior Developer opportunity based in Newcastle upon Tyne, with a salary of 45,000 to 55,000. Our stack includes TypeScript, Node.js, React, React Native/Expo, Kubernetes on Google Cloud Platform, and modern DevOps and CI/CD tooling.

last updated 36 week of 2026