1 to 25 of 47 Kotlin Jobs in the City of London

technical excellence What you'll bring Deep extensive experience of Android application development Established and highly skilled in all aspects of software engineering Strong programming skills in Java and Kotlin Solid understanding of Android architecture patterns and best practices Experience with video streaming protocols (HLS, DASH) Familiarity with ExoPlayer (bonus) Agile development experience with CI/CD pipelines Strong More ❯

technical excellence What you'll bring Deep extensive experience of Android application development Established and highly skilled in all aspects of software engineering Strong programming skills in Java and Kotlin Solid understanding of Android architecture patterns and best practices Experience with video streaming protocols (HLS, DASH) Familiarity with ExoPlayer (bonus) Agile development experience with CI/CD pipelines Strong More ❯

in native Android development, with a strong portfolio of shipped, consumer-facing applications. ? Required Technical & UI/UX Skills ? Deep expertise in native Android UI/UX development, including Kotlin and modern frameworks (e.g., Jetpack Compose, Coroutines, Flow). ? Demonstrated experience building complex, real-time, data-intensive user interfaces (e.g., chat applications, financial dashboards, real-time streaming apps). More ❯

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 ❯

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 ❯

including AWS design, security, and observability. Mentoring colleagues, conducting code reviews, and supporting a culture of learning and improvement. Candidate Profile Significant experience in modern Java development (Spring Boot, Kotlin, or similar). Strong track record in designing and evolving scalable, Cloud-based systems. Practical experience with iterative development, automated testing, and CI/CD. A pragmatic and collaborative More ❯

on development in React Native, where you will refactor and merge codebases from acquisitions, transitioning iOS components written in Objective-C or Swift and Android elements in Java or Kotlin into a cohesive cross-platform structure. This involves optimising for faster startup times, implementing native bridges for features requiring direct hardware access, such as geolocation services using Core Location More ❯

for growth, while still being hands on with technology. We aim to allow growth without becoming “post-technical” . Our clients diverse tech stack includes TypeScript, Java, .Net, Scala, Kotlin, Golang, Elixir, Python, .Net, Node.js, and Rust. Experience with one, or more than one of those languages would be preferred. We focus on lean teams without traditional management layers More ❯

for growth, while still being hands on with technology. We aim to allow growth without becoming “post-technical” . Our clients diverse tech stack includes TypeScript, Java, .Net, Scala, Kotlin, Golang, Elixir, Python, .Net, Node.js, and Rust. Experience with one, or more than one of those languages would be preferred. We focus on lean teams without traditional management layers 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 ❯

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 ❯

frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services. Experience in Java and Spring Boot, or iOS (Swift) or Android (Kotlin) along with exposure to Figma and Vercel is a big plus. Capable of writing clean, maintainable and well-tested code. Comfortable working in on-prem and cloud-native environments … paced, regulated environments where we ship at speed, embrace change, and never stop evolving. Your Technical Toolkit React/React Native/TypeScript JavaScript/iOS (Swift) or Android (Kotlin) RDBMS (Oracle/Sybase)/NoSQL databases (Document DB) AWS and cloud-native microservices containerised architecture (e.g. K8s, Docker) Modern software engineering practices with CI/CD pipelines and More ❯

tested as MVPs 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 End systems Ability to take concepts from More ❯

tested as MVPs 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 End systems Ability to take concepts from More ❯

frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services. Experience in Java and Spring Boot, or iOS (Swift) or Android (Kotlin) along with exposure to Figma and Vercel is a big plus. Capable of writing clean, maintainable and well-tested code. Comfortable working in on-prem and cloud-native environments … paced, regulated environments where we ship at speed, embrace change, and never stop evolving. Your Technical Toolkit React/React Native/TypeScript JavaScript/iOS (Swift) or Android (Kotlin) RDBMS (Oracle/Sybase)/NoSQL databases (Document DB) AWS and cloud-native microservices containerised architecture (e.g. K8s, Docker) Modern software engineering practices with CI/CD pipelines and More ❯

React Native Developer - London - Hybrid Working - £90,000-£100,000 p/a - React Native, TypeScript, Some knowledge of Objective-C/Swift/Java/Kotlin Christopher Ali are recruiting on behalf of a prestigious data company who are on the lookout for a Senior React Native Developer to join their team. The role will require 1 day More ❯

React Native Developer - London - Hybrid Working - £90,000-£100,000 p/a - React Native, TypeScript, Some knowledge of Objective-C/Swift/Java/Kotlin Christopher Ali are recruiting on behalf of a prestigious data company who are on the lookout for a Senior React Native Developer to join their team. The role will require 1 day More ❯

frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services. Experience in Java and Spring Boot, or iOS (Swift) or Android (Kotlin) along with exposure to Figma and Vercel is a big plus. Capable of writing clean, maintainable and well-tested code. Comfortable working in on-prem and cloud-native environments … at speed, embrace change, and never stop evolving. Your Technical Toolkit React/React Native/TypeScript Java (21) and Spring Boot/JavaScript/iOS (Swift) or Android (Kotlin) RDBMS (Oracle/Sybase)/NoSQL databases (Document DB) AWS and cloud-native microservices containerised architecture (e.g. K8s, Docker) Modern software engineering practices with CI/CD pipelines and 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 ❯

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 ❯

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 ❯

not expected to code in production daily, but able to get into the detail where required). Experience across modern web and mobile stacks – ideally NodeJS, React, Flutter, Swift, Kotlin, GCP/AWS. Demonstrated ability to deliver complex product roadmaps on time and at scale. Commercial and product-minded – able to connect technology decisions with business value. Inspirational leadership More ❯

not expected to code in production daily, but able to get into the detail where required). Experience across modern web and mobile stacks – ideally NodeJS, React, Flutter, Swift, Kotlin, GCP/AWS. Demonstrated ability to deliver complex product roadmaps on time and at scale. Commercial and product-minded – able to connect technology decisions with business value. Inspirational leadership 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 ❯