Ofertas › Teksystems
Teksystems · South East London, United Kingdom · £40,000 - 70,000 per year
Salary: £40,000 - 70,000 per year Requirements: Strong technical skills and creativity Experience with Java and Kotlin for server-side engineering Enjoys solving challenging problems and working with modern technologies Comfortable sharing ideas, with a focus on user experience and clean, high-quality code Experience thoughtfully and responsibly using AI and LLM-based tools to improve productivity, code quality, learning, or development workflows Responsibilities: Develop the mobile application service layer, or Backend for Frontend, used by the clients cardholders Build the Backend for Frontend API layer consumed by the clients mobile apps Work with engineers, product colleagues, designers, and QA to develop products and platforms for customers Help create interactive experiences across the consumer journey, before, during, and after purchase Technologies: AI API Backend Frontend Gradle GraphQL Java Kotlin LLM Mobile Network REST Security More: We are recruiting a Server-Side API Engineer for a payments client in London. This is a contract role through the end of the year, with a strong possibility of extension, based in Victoria, UK. You will join the Mobile Engineering team, working on services for the clients mobile apps and products used by tens of millions of cardholders worldwide. The team uses Kotlin, Gradle, REST, GraphQL, and Java. TEKsystems is part of the Allegis Group network. last updated 41 week of 2026