1 to 25 of 41 Kotlin Jobs in the City of London

throughout the SDLC Support secure deployment and testing practices in containerised environments Tech You’ll Work With: Automation tools: Playwright, Cypress, JUnit, Jasmine Languages: JavaScript/TypeScript, Java or Kotlin DevOps & Infra: Docker, Kubernetes, GitLab CI, Bitbucket Testing tools: Postman, browser dev tools, SAST/DAST integrations Environments: Unix and Windows What You Bring: Hands-on experience building test More ❯

future of our Carer Companion App. The successful candidate will not only be responsible for designing and implementing new features but will also lead a strategic initiative to leverage Kotlin Multiplatform (KMP) to abstract and share backend functionality across both platforms. This is an exciting opportunity for a forward-thinking developer to make a significant impact on a product … and intuitive user experience. Cross-Platform Collaboration: Work closely with our existing Android and iOS developers to foster a collaborative environment, share knowledge, and ensure consistency across both platforms. Kotlin Multiplatform Initiative: Lead the design and implementation of a Kotlin Multiplatform strategy to create a shared backend codebase for the Carer Companion App, improving development efficiency and code … to the team and the product. About you Proven experience as a Senior Mobile Developer with a strong portfolio of shipped applications on both Android and iOS. Expertise in Kotlin and a solid understanding of Swift . Demonstrable experience with or a strong passion for Kotlin Multiplatform . A deep understanding of mobile architecture patterns (e.g., MVVM, MVI More ❯

Senior Android Engineer (Apps & SDK – Kotlin, Jetpack) Hybrid | 1 day/week in Central London | UK-based | Permanent A fast-growing, well-funded tech company in Fintech space is looking for a Senior Android Engineer to join their high-impact mobile team. About the Role: They’re looking for a Senior Android Engineer to help shape and deliver two … lead key architecture decisions, build features that scale, and mentor others – all while delivering an exceptional mobile experience. You’ll Need: 6+ years of Android development experience. Expertise in Kotlin , Coroutines , Jetpack Compose , and Jetpack libraries . Proven experience building scalable, high-performance apps & SDKs. A solid grasp of modern architecture and clean code principles. Strong collaboration and communication More ❯

teams. You embrace ambiguity, foster collaboration, and promote psychological safety to help teams navigate change. Hands-on knowledge of secure API design, authentication services, and mobile development (Swift/Kotlin, React Native). Exposure to Figma, Vercel, and modern DevOps tools and practices. Experience leading engineering efforts across legacy and modern technology stacks, including COBOL and Microsoft technologies. Excellent More ❯

key technical decisions, ensuring our architecture remains scalable, secure, and maintainable. Maintain and evolve core applications such as POS kiosks, booking UIs, mobile apps, and integrations — including transitioning legacy Kotlin/Swift components to TypeScript with Expo. Collaborate cross-functionally to translate business needs into elegant technical solutions. Champion CI/CD pipelines, code quality, automated testing, and documentation More ❯

Role: Android Developer 🌍 Location: Central London, Hybrid 1 day on site per week 💰 Salary: up to £75,000 per annum, plus benefits and 10% bonus 🛠 Key Skills: Kotlin, MVVM, Modern Android Development Are you an experienced Android Developer with expertise in Kotlin? Do you thrive on crafting high-quality apps and delivering exceptional user experiences? If so, we … innovative entertainment company in Central London. In this role, you’ll play a pivotal part in building a brand-new Android app from scratch, using cutting-edge technologies like Kotlin and the MVVM architecture . Hybrid role: Work primarily from home with just one day a week in the office (flexible). The chance to work on end-to … end feature development for a flagship Android app, focused on delivering an exceptional user experience. About You: Strong experience in Android development and proficiency in Kotlin . Passionate about creating seamless, high-quality applications. Familiarity with Jetpack Compose , Coroutines , and MVVM architecture is a big plus. This is an incredible opportunity to work on a high-impact project in More ❯

Android Developer – Remote (must be UK based) – £38k Fully remote | Kotlin/Jetpack Compose | Personal Development & Progression Plan | Flexible Hours | Evolving Digital Agency Ada Meher is currently working with a scaling digital agency as they look to recruit a Junior-Mid Level Android Developer to work on the development of a number of their exciting client projects. The successful … applicant can expect to work on both greenfield development and BAU development project using Android and surrounding tech such as Kotlin & Jetpack Compose and MVI. This role would suit someone who has a solid grasp on the foundations of Android Development and is keen to take advantage of the resources and expertise made available to them internally to aide … their other life commitments. To Be Considered... 1-2 years of experience in Android Mobile App Development Experience working in a fast-paced environment Strong communication skills Experience with Kotlin, Jetpack Compose and MVI Experience with Unit Testing/TDD would be beneficial As mentioned, due to their commitment to continuous improvement, each employee in this business has a More ❯

Staff Backend Software Engineer (Java or Kotlin) £80,000 to £92,000 + Exceptional Benefits Hybrid (1 to 2 days per month in London) Permanent A well-known UK retail and ecommerce brand is scaling its technology team and hiring multiple Staff Backend Engineers over the coming months. This is a key part of a major digital transformation programme … agile product teams focused on modernising systems, ways of working, and customer experience across multiple digital channels. You will: • Build and maintain scalable backend services using modern Java or Kotlin • Work in a cloud-native environment using either AWS or GCP • Collaborate through pair programming and TDD in a Scrum or Kanban team • Lead on architectural decisions and guide … tooling • Contribute to engineering best practices and support technical decision-making What you will need to succeed... • Strong backend development experience in modern Java (Spring Boot) or server-side Kotlin • Experience mentoring or coaching developers and leading technical delivery • Solid understanding of Microservices architecture • Knowledge of CI/CD pipelines, Docker, and Kubernetes deployments • Hands-on experience with either More ❯

Kotlin Developer (London, UK) Hybrid: 2-3 days a week work from office Get The Future You Want! Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired by a collaborative community of colleagues around the world, and where you’ll … and help the world’s leading organizations unlock the value of technology and build a more sustainable, more inclusive world. Your Role We are seeking passionate and experienced Senior Kotlin Developer with strong backgrounds in Spring Boot and API design. The ideal candidates are forward-thinking individuals with a senior developer's mindset, capable of driving complex features end … technical solutions and maintain clear communication across teams Proactively identify and address technical challenges, driving continuous improvement in the codebase and processes. Stay updated with the latest trends in Kotlin, Spring Boot, and API design. Work closely with Mobile and Web FE team to build Backend for Frontend that enables faster scalable FE development Your Profile Proficiency in Kotlin More ❯

Senior Full Stack Developer – Kotlin/Java/React (Hybrid, London) We're working with an insurtech company that’s redefining how consumers experience insurance in the digital age. Their mission is to simplify and personalise the insurance journey, leveraging modern technology, intuitive design, and deep industry insight to deliver standout experiences – particularly in the automotive and mobility sectors. … Responsibilities: Designing and developing backend services and REST APIs using Kotlin and Java Building and integrating front-end interfaces using React.js, TypeScript & PostgreSQL Creating and maintaining AWS Lambda functions and infrastructure using Terraform Collaborating closely with product, design, and domain experts in a fast-moving, agile environment Playing a key role in shaping architecture and tech strategy as the … platform scales Qualifications: 6+ years' experience with Kotlin/Java, React.js, and TypeScript A solid grasp of SQL and practical experience with PostgreSQL Comfortable working with infrastructure-as-code and DevOps practices in AWS Experience working in agile teams with strong CI/CD and testing culture Strong communication skills – you're able to explain complex technical topics clearly More ❯

is crucial to improving performance, refining UX, and shaping the future of mobile at the organisation. Currently built using React Native, the app increasingly incorporates native elements (Swift/Kotlin) to unlock better performance and user experience. The incoming Android + iOS Engineers will be instrumental in driving this evolution forward. Key Responsibilities Collaborate with the Engineering Manager and … backend, and product teams Drive technical excellence, with a focus on high-quality code, maintainability, and best-in-class mobile experience Candidate Profile Strong experience developing mobile apps using Kotlin Deep understanding of native Android development, frameworks, and tools Proven track record of delivering high-quality, performant applications A passion for clean, maintainable code and continuous improvement Strong sense More ❯

and fellow developers to design and deliver solutions that drive real impact. In this role, you will: Design and develop backend services and data APIs using Scala, Java, or Kotlin on the JVM. Build intuitive and responsive web interfaces using modern JavaScript frameworks (e.g., React, Vue, or Angular). Collaborate with cross-functional teams across product, design, and engineering More ❯

scale engineering systems, with at least 2 years in senior technical leadership roles such as Principal Engineer or Architect. Strong hands-on expertise across the stack, including Java, Spring, Kotlin, PostgreSQL, MongoDB, AWS, and React.js. Proven ability to translate product and business goals into scalable, robust technology solutions while leading agile teams and contributing to strategic roadmaps. Comfortable navigating More ❯

Staff Software Engineer/Developer (Java Kotlin AWS API) Hybrid WFH to £110k Would you like to progress your career in an impactful hands-on Software Engineer role working on Tech for Good? You could be joining a HealthTech Start-up, founded by two highly successful, Cambridge University educated management consultants, that is aiming to improve patient and social … Software Engineer you will collaborate with the CTO on the overall design and architecture of the products' tech stack, working on Greenfield applications. The tech stack is based on Kotlin, SpringBoot and AWS backend with TypeScript, React and Next.js on the front end. You'll be hands-on with architecture, design and coding, including complex business logic, authentication and … and liaise on bespoke product development. About you: You have expertise with software engineering best practices, experience across the full development lifecycle and tech stack You have experience with Kotlin, Java, SpringBoot and AWS You have a good understanding of APIs and permission based systems You have a good understanding of software architecture and have experience of building systems More ❯

Kotlin Engineer - Contract Looking for Java/Kotlin Engineers to work on a large scale, finance project for 12 months. Candidates must have 1-2+ years commercial Kotlin experience (Backend) Stack - Java/Kotlin, TDD/XP, AWS, Kafka. £600 - £650 per day Outside IR35 2 days a week in London Please get in touch More ❯

gen in the "Secure Tech" focused industry — with real impact and purpose. Key responsibilities: React Native Developer (Expo) – Secure Tech Build performant, secure mobile applications using React Native (Expo), Kotlin, and Swift. Integrate with Gmail APIs, manage OAuth2 flows, and handle MIME payloads. Implement responsive UIs from Figma designs. Contribute to architecture, automated testing, and CI/CD pipelines. … What we're looking for: React Native Developer (Expo) – Secure Tech 4+ years’ experience with React Native, ideally using the Expo SDK Strong knowledge of native module development in Kotlin/Swift Exposure to cryptographic principles, MIME standards, and OAuth2 Hands-on experience with secure systems, testing frameworks, and Git workflows Excellent communication and problem-solving skills If you More ❯

Lead Backend Engineer (Kotlin/JVM) in a B2B FinTech startup Hands-on, leading a team of 4 💷 Up to £100,000 + Equity + Benefits 📍Hybrid Remote: 3 Days in Central London office, 2 days working from home Join a B2B FinTech startup backed by a global bank, that is transforming the financial advisory space. They’ve created … unlocks the product roadmap, allowing the business to scale with confidence. Think: backend overhaul, introducing messaging layers (Kafka or PubSub), scaling infra, and embedding clean Engineering practices Tech Stack: Kotlin, Grails, Vert.x, gRPC, microservices, event-driven architecture, GCP, Kubernetes, Terraform, Kafka, BigQuery, PostgreSQL Ideal Candidates will have: 5+ years in Backend-focused JVM Engineering (Kotlin, Java, or Scala More ❯

Senior Android Engineer – Join a scaling InsurTech 🚀 💰Up to £80,000 🏡Hybrid Working – London CC based office 📱Kotlin We’re currently partnered with a scaling InsurTech – one of the UK’s most exciting scale-ups – as they are now looking for a Senior Android Engineer to join their growing team. They are now entering a new growth phase and … and participate in code review What are they looking for: Experience within Android development Good understanding of software architecture, design patterns and best practices Experience in app development using Kotlin, Jetpack Libraries, Jetpack Compose Knowledge in building SDKs that are scalable and user-friendly If this sounds like a great opportunity for you and you’d like to learn More ❯

enhance your responsibilities? Are you happy to work "high-side", on-site 5 days/week? And... do you have experience with a few of the following technologies?: Java Kotlin Python Kubernetes AWS JavaScript React Node.js ✅✅✅... let's chat! Salary: £55,000 - £80,000 + benefits. Start dates: Anytime in the coming 6 months Interview process: 2-stage More ❯

top of industry trends and Android advancements and adopt the latest best practices. What We’re Looking For: At least 4 years experience as an Android Developer. Expertise in Kotlin and Jetpack Compose . Please submit your CV to find out more. More ❯

in fintech or agency/consulting environments Strong background in designing microservice-based systems Comfortable working in small, highly collaborative teams Proficiency with 1 or more modern backend languages: Kotlin, Python, Java, Rust, Go Bonus: experience with payments, digital banking, or financial infrastructure More ❯

platform – the most highly funded project in the firm. This role applies to a developer using any programming language as they use a range from Java/Scala/Kotlin to Python/C#/F# and C++. Additionally, this is a great opportunity to pick up any new technologies as the ideal candidate is someone who can cross More ❯

for T-Shaped profile with experience in following languages and technologies like Java, J2EE, Springboot, React, Angular, CCS, CSS pre-processors and Node.js. Secondary Skills hands-on experience on Kotlin and C# will be an added advantage. CRM tool such as Salesforce knowledge will be an added advantage. Knowledge of modern DevOps CI/CD practices with relation to More ❯

South East/Remote. Salary: up to £95,000 + + competitive benefits, depending on experience. Requirements: Experience building and shipping large scale applications Knowledge of Java AND OR Kotlin A solid understanding of AWS OR GCP Experience with TDD and pain programming. Experience with third-party libraries and APIs. Experience leading engineering decisions in a complex environment and More ❯

South East/Remote. Salary: up to £95,000 + + competitive benefits, depending on experience. Requirements: Experience building and shipping large scale applications Knowledge of Java AND OR Kotlin A solid understanding of AWS OR GCP Experience with TDD and pain programming. Experience with third-party libraries and APIs. Experience leading engineering decisions in a complex environment and More ❯