23 of 23 Permanent Kotlin Jobs in Slough

experience in React Native development. Strong JavaScript/TypeScript skills. Experience integrating with REST APIs and/or GraphQL. Familiarity with native mobile development (Swift, Objective-C, Java, or Kotlin) is a plus. Understanding of mobile UI/UX best practices. Passion for fintech and building products that make a real difference. Day to day: Develop and maintain our More ❯

opportunity to carve out the future, including your role in a growing and ambitious business. We would love to hear from you if 👇 ✅You bring deep technical expertise in Kotlin, Jetpack Compose, concurrency (coroutines/flows), persistence (Room/Realm), architecture patterns (MVVM/MVI), and testing - and are motivated by solving challenging technical problems. ✅ You’re an Android More ❯

for iOS and Android. Collaborate closely with product, design, and backend teams to deliver seamless, visually polished experiences. Integrate and extend React Native functionality with native modules (Swift or Kotlin) when required. Own app store releases and ensure smooth deployment and maintenance processes. Monitor production performance using tools for crash reporting, analytics, and logging. Help shape architecture and tooling More ❯

Principal Accountabilities: - Build robust and scalable software for business critical, web-based applications - Design, build, test, document and maintain API’s and integrations - Develop new functionality in our core Kotlin based services, working in multi-disciplinary teams - Ensure quality control using industry standard techniques such as automated testing, pairing, and code review - Work with the Product team to understand More ❯

realistic strategies for execution so they can be built rapidly and tested prototypes prior to deployment Track record with front-end (React, Unity, WebGL, Android, iOS, React), back-end (Kotlin, REST, AWS, PHP8/Symfony4, AWS/Azure), AI, ML, web Past experience as a hands-on software engineer, ideally on back and front end systems and Unity client More ❯

ll contribute across the full development lifecycle from architecture and coding to testing, deployment, and monitoring. You will also be working closely with internal and external partners. ⭐ Requirements: Java, Kotlin, Springboot BONUS: Front end technologies exposure If you’re looking to join a rapidly growing company where you can make a real impact and this sounds like you, please More ❯

monitoring What You’ll Bring... 4+ years hands-on experience building distributed or performance-sensitive systems, ideally with microsecond-level latency or high-throughput requirements Proven coding ability in Kotlin, or another object-oriented language such as Java (preferred), C++ or C# Familiarity with Linux APIs and comfort developing in a Linux-based environment Strong computer science fundamentals with More ❯

mentor engineers across a cross-functional team Work closely with product managers and business stakeholders to align technical direction with strategic goals Write high-quality, production-ready code using Kotlin or Java Lead by example through code reviews, architectural decisions, and continuous delivery practices Drive improvements in engineering practices, tooling, and team workflows Help scale backend infrastructure to meet More ❯

functional, efficient, and reusable web and mobile-based sites that drive these web applications. By using experience as mid-senior level engineer working across modern web stack. We speak Kotlin for services and Python when working with data. Our rich UIs are built in React and Typescript. Postgres is our preferred database engine and our infrastructure is entirely cloud More ❯

Android & iOS Engineer Roles | Kotlin/Swift | London Hybrid | Consumer App | Tech for Good 💚 Are you passionate about building high-quality mobile apps that make a genuine impact on the lives of others? 📱 Do you want to work on a product used by millions of users globally every single day? 🌍 If so, this could be the opportunity for you. … to Unicorn status and are seeking several talented Mobile Engineers to join them as they embark on their next phase of growth 🦄 Live roles: ✨ x2 Mid–Senior Android Engineer (Kotlin) – building cutting-edge native features, improving app performance, and working across design, architecture, and delivery. ✨ x1 Senior iOS Engineer (Swift) – shaping the iOS app’s evolution, leading on new … ideas, energy, and curiosity, and help shape the future of a product used worldwide. What we’re looking for: Android Engineer: ✔ 2+ years building cutting-edge Android apps in Kotlin ✔ Strong grasp of Coroutines, caching, and Jetpack Compose ✔ Experience delivering apps to the Play Store ✔ Passion for clean architecture (MVVM/MVI) and great user experiences iOS Engineer: ✔ 5+ More ❯

Responsibilities Include: Platform Ownership: Drive the architecture and development of the core React Native application, ensuring it is scalable and high-performance. Native Integration: Deep-dive into native components (Kotlin/Swift, with a focus on iOS) to build custom features and optimise performance where required. Production Lifecycle: Own the entire mobile deployment lifecycle, including managing App Store/… is being looked for: Deep experience in React Native , with a proven track record of building and deploying complex, production-ready applications. Experience working with native modules in either Kotlin (Android) or Swift (iOS) , with a preference for iOS expertise. Demonstrated experience owning the application release process on the App Store or Google Play Store. Familiarity with tools and More ❯

Our leading Banking client are looking for a talented Senior Kotlin Developer to join a small highly skilled team tasked with developing a modern trading application to replace an existing Legacy system. You'll design, develop, and implement a scalable trading application to replace the Legacy system. You'll collaborate with team members to architect and deliver high-performance … Back End solutions using Kotlin. This is a long-term contract position. The following skills/experience is required: Strong Kotlin experience Kubernetes, Docker, MongoDB, Postgres or exposure to relational databases. Good Financial Services background, ideally in Front Office. Excellent communication skills Rate: Up to £850/day Duration: 6 months + (multiple extensions) Location: London (good work from … home options available) If you are interested in this Senior Kotlin Developer position and meet the above requirements please apply immediately. More ❯

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 with a greenfield built out of a next generation high … the sector has to offer! 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 passion for technology! If this More ❯

Backend Engineer (Kotlin) – Hybrid (London) – Up to £95k 💰 Join a fast-growing cleantech company as a Backend Kotlin Engineer that is driving the global shift to clean, affordable energy through an integrated hardware and software smart-grid platform focused on residential EV charging. By leveraging data, AI, and strong industry partnerships, they connect cars, chargers, people, and energy … providers to place consumers at the heart of the energy transition. 🚀 What You'll Do: 🧱 Contribute to scalable backend infrastructure built in Kotlin ✅ Write clean, maintainable, tested code in production 🧠 Shape tech strategy and architecture with new ideas and tools 🤝 Work closely with Product Owners and team members to deliver value 👨‍🏫 Mentor junior developers and support their growth 🧠 What … You Bring: 💻 Solid commercial experience in Kotlin (Open to those with a java background) 🌱 Experience with Spring Boot , or similar frameworks (e.g. Ktor) 🧩 Strong API-first mindset and clean coding practices 🧪 Knowledge of Agile, peer reviews, pair programming, and test-driven development 📐 Understanding of software design principles (SOLID, design patterns, etc.) 🎯 Experience turning stakeholder needs into scalable solutions 🎁 Perks More ❯

bonus + equity 📍 Location: Hybrid in 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 assist in the global … by providing affordable access to 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 tech companies This is a … very comprehensive, generous benefits package: Equity Bonus Pension Private healthcare Life assurance Income protection Flexible working (work from home 3x per week) If you'd love to work with Kotlin on impactful projects, while taking the next step in your career, apply now for this exciting Software Engineer opportunity! Please note : Due to compliancy reasons, we will only be More ❯

systems (finance/trading a plus) Strong Linux and command-line skills Knowledge of market data, order flows, and related protocols Ability to read and troubleshoot code (C++, JavaScript, Kotlin) SQL proficiency and familiarity with Git/CI-CD Experience with AWS, Prometheus, Grafana, RabbitMQ Tech Stack Backend: Kotlin, Node.js, TypeScript, RabbitMQ Cloud: AWS Databases: MySQL Monitoring: Prometheus More ❯

next-gen in the "Secure Tech" focused industry — with real impact and purpose. Key responsibilities: React Native Developer – 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. … re looking for: React Native Developer (Expo) – Secure Tech Ideally 4+ years’ experience with React Native (Expo SDK nice to have). Any experience of native module development in Kotlin/Swift would be great. Exposure to cryptographic principles or an interest in Encryption desirable. MIME standards, and OAuth2 nice to have. Hands-on experience with secure systems, testing More ❯

platforms across asset classes Design pricing and risk logic, market data processing, and order handling Optimise data flow and system throughput under real-time constraints Implement core components in Kotlin (some C++ and legacy Python/Java) Engineer for reliability, testing, monitoring and rapid fault recovery What You'll Bring Solid command of CS fundamentals, algorithms, architecture, systems, likely … been a competitive programmer. Advanced experience in Kotlin or Java (Other languages considered C#/F#/C++) Deep familiarity with Linux environments and system-level APIs Experience with high-throughput, low-latency systems Ability to work independently and review code for correctness and clarity Finance experience not required, but curiosity helps Why Apply High-impact team with wide More ❯

Backend Engineer (Kotlin) – Hybrid (London) – Up to £95k 💰 Join a fast-growing cleantech company as a Senior Backend Kotlin Engineer that is driving the global shift to clean, affordable energy through an integrated hardware and software smart-grid platform focused on residential EV charging. By leveraging data, AI, and strong industry partnerships, they connect cars, chargers, people, and … energy providers to place consumers at the heart of the energy transition. 🚀 What You'll Do: 🧱 Contribute to scalable backend infrastructure built in Kotlin ✅ Write clean, maintainable, tested code in production 🧠 Shape tech strategy and architecture with new ideas and tools 🤝 Work closely with Product Owners and team members to deliver value 👨 🏫 Mentor junior developers and support their growth … What You Bring: 💻 Solid commercial experience in Kotlin (5+ years) 🌱 Experience with Spring Boot , or similar frameworks (e.g. Ktor) 🧩 Strong API-first mindset and clean coding practices 🧪 Knowledge of Agile, peer reviews, pair programming, and test-driven development 📐 Understanding of software design principles (SOLID, design patterns, etc.) 🎯 Experience turning stakeholder needs into scalable solutions 🎁 Perks & Benefits: 💰 Salary Up to More ❯

Senior Java Developer - Java, Kotlin, Concurrency, Kafka, RDBMS, Unix, Linux, Front Office, Multi-threading Role Overview: I am seeking a Senior Java Developer to join a leading Investment Bank as part of their global front-office technology team. This is a hands-on position focused on working with a real-time, event-driven system that underpins our industry-leading … and other relevant frameworks. Take full ownership of feature development from design through to production deployment. Collaborate effectively with cross-functional teams, balancing independence and teamwork. Key Skills: Java Kotlin Concurrency Message-driven architectures - Kafka, MQ SQL Queries Unix/Linux scripting Multithreading This is a full time role offering a salary of up to £130k. You will be … office in London 3 times per week. If you are interested or know anyone who might be please apply or email me direct - adam.wirth@nicollcurtin.com Senior Java Developer - Java, Kotlin, Concurrency, Kafka, RDBMS, Unix, Linux, Front Office, Multi-threading More ❯

Backend Engineer (Kotlin) – Hybrid (London) – Up to £80k 💰 Join a rapidly growing cleantech company as a Mid Backend Kotlin Engineer , helping to accelerate the global move toward clean and affordable energy. The team is building an integrated hardware and software smart-grid platform that powers residential EV charging, using data, AI, and strong partnerships to connect vehicles, chargers … people, and energy providers — putting consumers at the center of the energy transition. 🚀 What You’ll Be Doing Build and maintain scalable backend systems using Kotlin Deliver clean, reliable, and well-tested production code Contribute to architectural decisions and technical strategy Collaborate with Product Owners and cross-functional teams to deliver high-impact solutions Guide and mentor junior developers … fostering continuous learning and improvement 🧠 What We’re Looking For 2+ years of hands-on commercial experience with Kotlin Strong knowledge of Spring Boot or similar frameworks (e.g., Ktor) Proven experience designing and developing robust APIs Familiarity with Agile practices, peer reviews, and test-driven development Solid understanding of software design principles and best practices (SOLID, design patterns, etc. More ❯

Do you 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 partnered with a rapidly rising AI infrastructure company … than-production test data in 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 a growing engineering team. A Senior … Backend Engineer will have: Start-up or scale-up experience BSc in Computer Science or STEM subject from Russell Group university Have worked in product-focused tech companies Kotlin (Can have also worked with with Java) Spring Boot You will enjoy many great benefits too: Flexible work hours Bonus Share options Personal development budget Private healthcare, dental and eye More ❯

shape the future of digital infrastructure. Their platform optimises real-time operations, connecting users with seamless, intelligent technology solutions. We are looking for Principal Engineer with deep expertise in Kotlin to help scale and enhance their high performance systems. This is an opportunity to work with modern backend architecture, collaborating with top-tier engineers in a fast-moving, product … focused environment. Responsibilities as a Principal Engineer: Contribute to the businesses technology strategy and architecture Contribute to the backend Kotlin infrastructure Ship resilient and well tested production code Collaborate with different teams to deliver value that aligns to business objectives Mentor and coach more junior members of the team Continuously evolve and improve the ways of working in the … business Key Requirements: Strong commercial experience in the Kotlin ecosystem for backend development Confidence to work with Spring Boot or Ktor to build robust microservices Strong ability to write secure, resilient, and well-tested code Ability to align engineering to ambitious commercial objectives Experience in line management responsibilities while remaining deeply technical Desire for building API-first products Deep More ❯