Senior Java Developer
As a Senior Java Developer, you will play a key role in building and scaling high-performance backend services within a complex, data-driven environment. You will contribute to architecture decisions, system reliability, scalability, and security across our platforms, while working closely with cross-functional teams in a collaborative and fast-paced environment. This role combines hands-on backend development with system design, performance optimisation, and technical leadership.
- Build scalable, testable backend solutions independently from requirements through to production deployment
- Own services end-to-end and guide complex features through the full development lifecycle
- Integrate third-party services according to business and technical requirements
- Collaborate closely with Backend, Frontend, QA, and Infrastructure teams
- Contribute to architecture discussions and help shape the technical roadmap
- Mentor team members on best practices, troubleshooting, and system design
- Monitor, profile, and optimise application and database performance
- Design and execute high-load performance testing scenarios
- Work on complex SQL tasks and performance optimisation using PostgreSQL
- Handle large-scale datasets with a focus on scalability and reliability
- Troubleshoot production issues using logs, metrics, alerts, and monitoring tools
- Strong commercial experience with Java Core and Spring Framework / Spring Boot
- Proven experience designing scalable systems using RDBMS and SQL
- Hands-on experience with Docker and Kubernetes
- Strong understanding of JSON, JWT, HTTP(S), REST APIs, and WebSockets
- Practical experience with Netty and non-blocking I/O
- Experience working with logging, monitoring, profiling, and alerting tools
- Strong debugging and problem-solving skills
- Good understanding of system security best practices
- Intermediate English level or higher for international collaboration
- Experience working with high-load systems and performance optimisation
- Familiarity with technologies such as Kafka, GCP, Elasticsearch, Flyway, Grafana, and Kubernetes-based environments
- Full remote work flexibility
- Generous paid time off including vacation, sick leave, and public holidays
- Strong growth and career development opportunities
- Opportunity to work on scalable, high-performance systems using modern technologies
- Collaborative, international, and fast-moving environment
Traffic Label is an online affiliate marketing business that has operated across all major digital marketing channels since 2006. It builds and runs content and comparison websites that acquire customers for iGaming and other operators. Its portfolio includes brands such as Onlinebingo.co.uk and 1CS.com. Traffic Label is headquartered in St Albans, England.