Senior Full Stack Developer
Harnham · London, London
Senior Full Stack Developer at Harnham, based in London, London, paying £70,000 - £85,000 per annum. This is a permanent role.
- Salary
- £70,000 - £85,000 per annum
- Location
- London, London
- Contract
- Permanent
- Posted
- 2 days ago
- Closes
- 18 Nov 2026
- Sector
- Software Developer
About 6% above the going rate for software developer
Reference https://www.harnham.com/job/e1aeb1da-8723-4ba1-d23d-08d5948a7341-senior-full-sta
About the role
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SENIOR FULL STACK DEVELOPER
£70,000 – £85,000
LONDON
This is an exciting opportunity for a Senior Full Stack Developer to join a growing technology business that is investing heavily in its platform and engineering capabilities. You’ll play a key role in rebuilding and enhancing a modern cloud-based platform, working across the full software development lifecycle while helping to shape technical decisions and mentor other engineers.
THE COMPANY
Our client is an international technology organisation with a large and growing user base, operating across multiple markets globally. Their products combine software, cloud technologies, and connected digital services, creating a highly scalable technology ecosystem serving millions of users. With continued growth and ongoing investment in their platform, they are expanding their engineering team and looking for experienced developers who enjoy solving complex technical challenges while collaborating across multiple business functions.
THE ROLE
Responsibilities include but are not limited to:
- Contribute to the ongoing rebuild and evolution of a modern platform architecture
- Develop scalable full stack applications using Node.js, TypeScript, React/Next.js, and cloud technologies
- Design and build APIs using GraphQL and REST principles
- Work closely with product, mobile, engineering, and business stakeholders to deliver high-quality solutions
- Mentor and support other developers, promoting strong engineering standards and best practices
- Influence technical decisions and contribute to architectural discussions across the platform
- Help improve system performance, scalability, reliability, and maintainability
YOUR SKILLS AND EXPERIENCE:
- Strong commercial experience building full stack applications in modern engineering environments
- Expertise with Node.js and TypeScript for backend development
- Experience with React and/or Next.js for frontend development
- Strong understanding of GraphQL, REST APIs, and distributed systems
- Experience with Kafka and event-driven architectures
- Knowledge of AWS, Docker, and cloud-native development practices
- Experience working with PostgreSQL, MongoDB, Redis, or similar database technologies
- Strong communication skills with the ability to engage both technical and non-technical stakeholders
SALARY AND BENEFITS
- £70,000 – £85,000 base salary
- Contributory pension scheme
- Private Medical
- 25 days holiday
HOW TO APPLY
Please register your interest to Mia Randhawa by sending your CV through the ‘Apply’ link
To Apply for this Job Click Here
Reference: https://www.harnham.com/job/e1aeb1da-8723-4ba1-d23d-08d5948a7341-senior-full-sta · Posted 2 days ago · Closes 18 Nov 2026 · Listed via Harnham
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