> Markdown version of [/jobs/ext/2075559-senior-java-kotlin-developer](https://www.wearedevelopers.com/jobs/ext/2075559-senior-java-kotlin-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Java Kotlin Developer - **Company:** HCLTech - **Location:** London, UK - **Experience:** Expert - **Salary:** £30,000.0 - £50,000.0 - **Contract:** Permanent contract - **Skills:** Clean Code Principles, Java (Programming Language), Cloud Computing, Continuous Integration, Key Management, Systems Development Life Cycle, Standard Sql, Data Logging, Test-Driven Development (TDD), System Availability, Backend, Kotlin, Extreme Programming - **Published:** August 16, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5844156615 ## About the Role * Strong commercial experience building backend services in Kotlin * Deep experience with Extreme Programming practices, including mob programming, test-driven development, continuous refactoring, and clean code discipline * Cloud experience in CARE Cloud or GCP, including GKE and/or Cloud Run, Cloud SQL, Memorystore, Artifact Registry, Cloud Logging, and key management * CI/CD and SDLC experience in a regulated or enterprise environment * Comfortable working in production systems with high availability and correctness requirements ## Description * Work primarily in mobs, sharing ownership of design and code * Build, test, and evolve services with a strong focus on clarity, simplicity, and maintainability * Support the platform in production * Use incidents and defects as opportunities to improve system design and resilience * Contribute across development, integration, and production support * Help expand the platform into core business features such as sales screens, hedge workflows, and allocation processes Technologies: * Backend * CI/CD * Cloud * GCP * Support * Kotlin * SQL * Java * TDD * XP ## Related Videos - [Why Kotlin is the better Java and how you can start using it](https://www.wearedevelopers.com/videos/661-why-kotlin-is-the-better-java-and-how-you-can-start-using-it) - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [How building an industry DBMS differs from building a research one](https://www.wearedevelopers.com/videos/768-how-building-an-industry-dbms-differs-from-building-a-research-one) - [Moving from Java to Kotlin](https://www.wearedevelopers.com/videos/384-moving-from-java-to-kotlin) - [Tackling Complexity With Functional Programming And Kotlin](https://www.wearedevelopers.com/videos/705-tackling-complexity-with-functional-programming-and-kotlin) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [Top 10 Java Libraries](https://www.wearedevelopers.com/magazine/364-top-10-java-libraries) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london)