Full Stack Java Engineer

Typically 4+ years' professional software development, most of it in Java. Solid modern Java and object-oriented design, comfortable in older codebases too.

Hands-on Spring Boot: REST APIs, Spring Security, Hibernate/JPA. Building and consuming APIs, integrating third-party services, handling failure modes in someone else's system.

You have owned something: an integration, a service or a feature area where you were accountable for it working in production, not just for writing the code.

Daily, practical use of AI coding tools with a clear discipline for verifying what they produce. You can explain what you check, how you catch a made-up API or a silent behaviour change, and when you do not trust the output.

You read third-party API documentation carefully, spot the gaps early, and go to the provider's sandbox or support desk to resolve ambiguity rather than waiting to be told.

Frontend you can ship to production. We care about fundamentals more than a particular framework: component-based UI and state management, how the browser and HTTP actually work, accessibility, performance, frontend security basics (XSS, CSRF) and testing. Experience with any mainstream framework (React, Angular, Vue or similar) and TypeScript.

SQL and relational databases. Automated testing at unit, integration and end-to-end level (JUnit, Mockito, Playwright or similar). Git, Maven or Gradle.

Comfortable with CI/CD pipelines, deploying to and supporting applications in the cloud (AWS or similar), and working with containers as a developer.

Working understanding of distributed systems: services talking over a network, failure handling, idempotency, consistency trade-offs.

Secure coding basics: input validation, secrets handling, dependency hygiene, and authentication and authorisation patterns (OAuth 2.0, OIDC, JWT).

Clear written communication: your tickets, review comments and documentation will be read by colleagues outside engineering, our partner and our auditors.

Degree in computer science or a related field, or equivalent practical experience.

Kotlin, or a strong interest in it.

Payments, PSP or payment gateway integration experience.

Experience building or operating multi-tenant SaaS.

Experience working alongside, or reviewing the work of, an outsourced or offshore team.

Experience in a regulated or high-availability environment (PCI DSS, financial services, healthcare).

Messaging and event-driven patterns, caching, observability basics (metrics, tracing, structured logging).

Exposure to real-time voice or telephony systems.

A track record of automating repetitive engineering work: dependency upgrades, code generation, test fixtures.