26 to 41 of 41 Kotlin Jobs in the City of London

scale, and we’re looking for Java Engineers to help shape and grow our microservices architecture. There will also be the chance to use Kotlin on new future projects. What you’ll do Build and evolve Java microservices using Spring Boot Design scalable, resilient services in a distributed environment … Hands-on experience with Spring Boot & Microservices Experience building REST APIs and working in cloud environments Comfortable in agile, collaborative teams Nice to have Kotlin experience (not essential) Event-driven or reactive architecture exposure Working pattern Hybrid: 3 days per week in London office Why join? Work ...

This role offers the opportunity to influence the future of Android engineering for a major, high-traffic consumer application. If you’re passionate about Kotlin architecture, mobile scalability, and exploring hybrid delivery models, this role places you at the centre of an ambitious mobile evolution programme. We’re seeking … embed directly with engineering teams to accelerate parallel feature development. The Impact You’ll Make ● Lead the technical architecture of a large-scale Kotlin-based Android application. ● Evaluate hybrid delivery options, including integrating React Native or WebView-based experiences into native flows. ● Identify architectural simplifications that reduce complexity ...

extremely strong engineer team and have plenty of opportunities to learn from seniors. What You’ll Be Doing Developing and shipping new features in Kotlin, using Jetpack Compose to deliver world-class mobile experiences. Collaborating with designers, iOS engineers, and backend teams to craft beautiful, responsive UIs. Contributing … accessibility, and overall app experience across a variety of devices. Requirements for the role 3+ years of commercial Android development experience. Strong proficiency in Kotlin , Jetpack Compose , and modern Android frameworks. Deep understanding of lifecycle management , asynchronous programming , and UI state handling . Familiarity with clean architecture principles ...

interested in working in Tech for Good? Have you got experience working with Kotlin, or are keen to work with Kotlin? Senior Software Engineer – Clean Energy for EV Charging 💰 Up to £95k + bonus + shares + benefits 📍 Hybrid in London 2 days per week We’ve just … exciting projects in the pipeline, they are looking to grow their team with Senior Software Engineers who have experience in the following: Kotlin software development (They are also open to Core Java experience, as long as you are happy to work with Kotlin) AWS or other cloud experience ...

Senior Software Engineer (Kotlin) 💰 £85,000 - £95,000 + bonus + excellent Benefits 📍 Hybrid - 2 days onsite in Central London (Zone 1) Are you a JVM engineer curious about Kotlin – or already loving it? Want to solve complex problems that contribute to a greener, more sustainable world? 🌍🌱 Join … Design, build and evolve platform architecture across distributed systems. Analyse production systems to uncover and resolve performance issues. Contribute to backend design using Kotlin (or JVM), supporting a polyglot mindset. Collaborate across engineering to improve practices, tooling, and system design. Mentor and influence technical direction company-wide. Tech & Environment ...

Software Engineer (Kotlin) 💰 £65,000 - £80,000 + bonus + excellent Benefits 📍 Hybrid - 2 days onsite in Central London (Zone 1) Are you a JVM engineer curious about Kotlin – or already loving it? Want to solve complex problems that contribute to a greener, more sustainable world? 🌍🌱 Join … Design, build and evolve platform architecture across distributed systems. Analyse production systems to uncover and resolve performance issues. Contribute to backend design using Kotlin (or JVM), supporting a polyglot mindset. Collaborate across engineering to improve practices, tooling, and system design. Bring new ideas to the cross-functional team Tech ...

Senior JVM Engineers - Java, Kotlin, Scala We are partnered with a rapidly growing consultancy, who are looking for multiple JVM Engineers to work on a large scale project. Stack - Java/Kotlin, AWS, TypeScript, TDD. Salaries - £95k - £120k 1-2 days a week in London They work ...

Title: Senior Kotlin Developer Client: Leading Trading Firm Rate: Up to £850 p/d Duration: 6 Month - Rolling Location: London - Hybrid We are looking for a Java Developer, with strong experience working in the finance sector, to join a leading trading firm based in London and help them … This is a 6 month rolling contract with very high chance of extension! Skills/Experience Strong hands-on/commercial coding experience in Kotlin Experience working with Java Strong experience working in the finance sector - e-trading experience a big plus!! Strong Communication skills A personality and genuine ...

London (2x per week) We are very excited to be continuing our partnership on this exclusive position to join the company as a Kotlin Software Engineer from a JVM background. You will be joining a highly innovative scale-up leading at the forefront of the GreenTech industry, as they … clean energy for the charging of electric vehicles. In this position, they are looking for experience in: 3+ years commercial experience JVM development - Java, Kotlin or Scala (Bonus) if you have already worked with Kotlin Microservices architecture Public cloud technologies e.g. AWS Have worked in modern, product-focused ...

Lead Software Engineer (Kotlin) 💰 £110,000 - £130,000 + bonus + excellent Benefits 📍 Hybrid - 3 days onsite in Central London (Zone 1) Want to manage a team that builds tech accelerating the move to clean, affordable energy? Enjoy being hands-on and thrive in fast-growing, product-led environments … Design, build and evolve platform architecture across distributed systems. Lead a small squad (technical leadership and people management) Contribute to backend design using Kotlin (or JVM), supporting a polyglot mindset. Collaborate across engineering to improve practices, tooling, and system design. Grow and shape your team Tech & Environment Kotlin ...

Contract Data Engineer (JVM/Kotlin/Python) 6-month initial contract | Onsite (potential for hybrid) An elite quantitative research and trading firm is looking for a Contract Data Engineer to join a Reference Data Engineering team supporting critical research and trading use cases. This team owns complex financial … ingestion and transformation pipelines • Working across SQL Server, JVM applications, and Spark-based workloads • Contributing improvements to data quality, performance, and maintainability Tech environment • Kotlin & Spring Boot for core data processing services • Python for tooling and automation • Legacy systems in C# and Scala/Spark • Exposure to data lakes ...

upgrade legacy systems, improve reliability, and ensure data-driven systems remain secure and maintainable for the future. Responsibilities: Take legacy applications written in Kotlin, Java, and C# and bring them up to modern standards Review and understand existing systems to identify areas for improvement Plan and execute upgrades, ensuring … quality, security, and performance Document improvements and share knowledge to strengthen the team’s long-term capabilities What you'll need: Strong experience in Kotlin, Java, and/or C#, ideally in production systems Familiarity with modern JVM frameworks (Spring Boot, etc.) and legacy .NET applications Experience upgrading ...

role, you will: Build Granola for Android from the ground up, owning every layer from architecture to the final shipped experience Architect a modern Kotlin + Jetpack Compose codebase that feels native to Android from day one Bring Granola's audio magic, transcription, chat, and next-generation AI features … background looks something like: You've shipped polished Android apps end-to-end, from greenfield architecture to launch and iteration You're fluent in Kotlin, at home in Jetpack Compose, and willing to dive into lower-level Android frameworks when needed You've built (or are excited to build ...

care about 9-5 fixed hours; we care about delivery and excellence. One of our current projects requires deep expertise in Android (Kotlin). While we take on diverse projects across various stacks, your immediate priority will be owning and architecting a performance-critical mobile data collection ecosystem. This … that afternoon you might be building a slide deck for a client pitch or debugging a Docker deployment. What You’ll Do Architect & Build (Kotlin focus): Take full ownership of our high-performance Android data collection app. Expert-level Kotlin is essential here. Technical Decision Making: Choose ...

love coding with Kotlin? Have you worked in a fast-paced start-up environment? 🚀 Senior Backend Engineer – AI transforming the future 🚀 📍 Location: Hybrid in London approx. 1-2 days a week (flexible work hours) 💰 Compensation: Up to £105k + bonus + equity We are very excited to have just … minutes, without the never-ending manual work or compliance risks. Having just received their Series A funding, they’re hiring Senior Backend Engineers with Kotlin (or a combination of Java & Kotlin experience) to build new product features, improve performance and scalability, and help define technical direction within ...

product? An established startup is searching for a senior level Android specialist to strengthen their mobile engineering team. You’ll work on a modern Kotlin based app, contributing to new features, technical improvements and overall product direction. In this role, you’ll be hands on across the Android stack … working with Kotlin, Compose, Coroutines, modular architectures and testing frameworks. You’ll collaborate closely with product and engineering to help deliver a high quality, user focused mobile experience. Requirements: 5+ years commercial Android experience Deep Kotlin knowledge Experience with testing and CI Ability to communicate technical reasoning clearly ...