Spectrum IT Recruitment
Principal Developer
Job Description
Salary: £70,000 - 70,000 per year
Requirements:- Strong experience with Java or Kotlin on JVM 11+
- Strong experience with Spring Boot
- Strong experience in enterprise backend development
- Strong experience with REST APIs and microservices
- Strong experience with SQL and NoSQL databases
- Strong experience with Docker and Kubernetes
- Strong experience with Git and modern development practices
- Comfortable operating at Principal level, making technical decisions, solving complex problems, and helping other engineers develop
- Desirable experience with telecommunications billing
- Desirable experience with Azure
- Desirable experience with CI/CD
- Desirable experience with Linux
- Desirable experience with Redis
- Desirable experience with Elasticsearch or additional programming languages
- Stay hands-on with around 90% of the role focused on backend development
- Work on a large platform with high-throughput APIs, Azure Cloud, and an event-driven architecture
- Help shape technical direction, engineering standards, and architecture
- Mentor other engineers
- Evaluate new technologies
- Work closely with customers and stakeholders to turn requirements into robust technical solutions
- Azure
- Backend
- CI/CD
- Cloud
- Docker
- ElasticSearch
- Git
- JVM
- Java
- Kotlin
- Kubernetes
- Linux
- NoSQL
- REST
- Redis
- SQL
- Spring
- Spring Boot
- microservices
- Angular
- DevOps
- MongoDB
- PostgreSQL
- RabbitMQ
- React
- Ruby
- TypeScript
More:
We are a growing business within the telecommunications and online payments space, working on a large, high-throughput platform. This is a remote-first Principal Software Developer role based around our Newbury office, with only 2-3 visits per year expected, though you are welcome to spend more time there if you prefer. You will join our 16-person R&D development team, made up largely of senior engineers, and benefit from monthly and quarterly all-hands events including summer and Christmas gatherings. Our benefits include 24 days holiday plus your birthday off, private medical cover, life assurance, critical illness cover, an employee assistance programme, and a contributory pension.
last updated 34 week of 2026
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About Spectrum IT Recruitment
Spectrum IT Recruitment
Newbury
IT
Skills & Technologies
Inferred from job description
Salary Insight
£70,000
This role
£55,000
UK median
This salary is 27% above the UK median for Developers (£55,000/yr).
Based on 2024–2025 UK technology sector benchmarks