1 to 25 of 35 Permanent Kotlin Jobs in the City of London

is a hands-on engineering role with the opportunity to work on cutting-edge systems from day one. Tech Stack: Java (with experience with another language such as Golang, Kotlin, Python etc) Spring Boot Kubernetes , AWS Grafana , GitHub Event-driven architecture, microservices CI/CD & rapid delivery tooling What You’ll Be Doing: Build scalable and secure microservices using More ❯

is a hands-on engineering role with the opportunity to work on cutting-edge systems from day one. Tech Stack: Java (with experience with another language such as Golang, Kotlin, Python etc) Spring Boot Kubernetes , AWS Grafana , GitHub Event-driven architecture, microservices CI/CD & rapid delivery tooling What You’ll Be Doing: Build scalable and secure microservices using 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 ❯

with Java Good understanding of JVM (memory model, concurrency, data structures) Spring framework, Spring Boot Maven Knowledge of REST APIs & Microservices MongoDB JUnit and TDD Nice to haves: AWS Kotlin Git Pipelines Redis Knowledge of Linux Key Details Reporting to: CTO Hours: Full time Location London - Hybrid WFH model, x2 days a week onsite (Wed/Thurs) Working with More ❯

with Java Good understanding of JVM (memory model, concurrency, data structures) Spring framework, Spring Boot Maven Knowledge of REST APIs & Microservices MongoDB JUnit and TDD Nice to haves: AWS Kotlin Git Pipelines Redis Knowledge of Linux Key Details Reporting to: CTO Hours: Full time Location London - Hybrid WFH model, x2 days a week onsite (Wed/Thurs) Working with More ❯

with REST APIs and offline caching . Exposure to databases (Realm/CoreData). An advocate of clean coding practices . Tech they use (and love): iOS | Android | Swift | Kotlin | .Net Core | Node.js | Java | Scala | Python | Docker | Kubernetes | AWS | Kafka | MongoDB Why You’ll Love Working for the team: 🌟 A culture built on trust, creativity, and inclusion. 🌟 Real flexibility More ❯

with REST APIs and offline caching . Exposure to databases (Realm/CoreData). An advocate of clean coding practices . Tech they use (and love): iOS | Android | Swift | Kotlin | .Net Core | Node.js | Java | Scala | Python | Docker | Kubernetes | AWS | Kafka | MongoDB Why You’ll Love Working for the team: 🌟 A culture built on trust, creativity, and inclusion. 🌟 Real flexibility More ❯

to align end-user requirements with effective technical solutions. - Promote best practices, minimize inefficiencies, and introduce emerging technologies to enhance team capabilities. Required Skills and Experience: - Professional experience with Kotlin, Java or Python and React - Proven experience as an Engineer working across multiple squads. - Demonstrated ability to drive technical and behavioural improvements across teams. - Expertise in leading architectural design More ❯

to align end-user requirements with effective technical solutions. - Promote best practices, minimize inefficiencies, and introduce emerging technologies to enhance team capabilities. Required Skills and Experience: - Professional experience with Kotlin, Java or Python and React - Proven experience as an Engineer working across multiple squads. - Demonstrated ability to drive technical and behavioural improvements across teams. - Expertise in leading architectural design 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 ❯

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 ❯

performance trade-offs Experience collaborating with TPMs and product managers on roadmap planning and prioritisation A strong grasp of cloud-native practices and modern dev tooling (we use AWS, Kotlin, Kafka, Terraform, etc.) Experience hiring, developing, and retaining talent in a fast-paced environment An inclusive leadership style that fosters trust, ownership, and team health Why join us? Work More ❯

performance trade-offs Experience collaborating with TPMs and product managers on roadmap planning and prioritisation A strong grasp of cloud-native practices and modern dev tooling (we use AWS, Kotlin, Kafka, Terraform, etc.) Experience hiring, developing, and retaining talent in a fast-paced environment An inclusive leadership style that fosters trust, ownership, and team health Why join us? Work 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 ❯

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 ❯

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 ❯

and wants to build something big. A true team player who enjoys startup pace and in-person collaboration. ?? Tech stack includes SAP/ABAP + ERP frameworks. TypeScript + Kotlin across the backend. LLM/AI workflows over large datasets. Containerised local-first development, Git deploys, Terraform. ?? Perks ?? Competitive salary + top-tier equity. ?? Breakfast + dinner in the More ❯

creating great software. You don’t need to tick every box, but numi's partner would love to hear what makes you great for this role! Strong knowledge of Kotlin, Compose, and JUnit . Experience in clean architectures (MVVM) using Compose . Exposure to Continuous Integration systems . Experience in writing Unit Tests (JUnit) and UI tests (Robolectric) . … Experience of multi-threading and working with frameworks like Kotlin Coroutines, RxJava, and RxKotlin . Experience working with REST APIs and offline caching . Exposure to databases ( Google's Room Library ). An advocate of clean coding practices . Additional knowledge of Swift is beneficial. Tech the team use (and love): Android | iOS | Kotlin | Swift | .Net Core | Node.js More ❯

creating great software. You don’t need to tick every box, but numi's partner would love to hear what makes you great for this role! Strong knowledge of Kotlin, Compose, and JUnit . Experience in clean architectures (MVVM) using Compose . Exposure to Continuous Integration systems . Experience in writing Unit Tests (JUnit) and UI tests (Robolectric) . … Experience of multi-threading and working with frameworks like Kotlin Coroutines, RxJava, and RxKotlin . Experience working with REST APIs and offline caching . Exposure to databases ( Google's Room Library ). An advocate of clean coding practices . Additional knowledge of Swift is beneficial. Tech the team use (and love): Android | iOS | Kotlin | Swift | .Net Core | Node.js More ❯

of their Carer Companion App. As a Senior Mobile Developer, you will play a pivotal role in designing and implementing new features, while also leading an initiative to integrate Kotlin Multiplatform (KMP) to unify and optimise development across both Android and iOS platforms. Responsibilities: Design, develop, and implement new features for the mobile app, delivering a seamless and intuitive … translate requirements into scalable solutions Uphold high standards of code quality, testing, and CI practices About you: Strong portfolio of shipped mobile applications across Android and iOS Expertise in Kotlin, with a solid understanding of Swift Deep knowledge of mobile architecture patterns such as MVVM or MVI Excellent communication and collaboration skills Proactive, problem-solving mindset with a passion More ❯

Software Engineering Manager leads a high performing large team, or multiple smaller teams, of Software Engineers, Tech Leads, and Principal Engineers working with a combination of iOS, Swift, Android, Kotlin, React, Java and AWS. Software Engineering Manager roles often focus on a couple of three main areas including Delivery, People and Technology. mkodo's Software Engineering Managers focus primarily … in various stages simultaneously. Proven track record of successfully recruiting diverse candidates at all levels balanced with technical and soft skills. Desirable: Our tech stack is iOS, Swift, Android, Kotlin, React, Java and AWS. Experience of one or more of those is desirable but not required if you have a strong technical background working in a modern language following More ❯

Software Engineering Manager leads a high performing large team, or multiple smaller teams, of Software Engineers, Tech Leads, and Principal Engineers working with a combination of iOS, Swift, Android, Kotlin, React, Java and AWS. Software Engineering Manager roles often focus on a couple of three main areas including Delivery, People and Technology. mkodo's Software Engineering Managers focus primarily … in various stages simultaneously. Proven track record of successfully recruiting diverse candidates at all levels balanced with technical and soft skills. Desirable: Our tech stack is iOS, Swift, Android, Kotlin, React, Java and AWS. Experience of one or more of those is desirable but not required if you have a strong technical background working in a modern language following More ❯

Senior Full Stack Developer – Kotlin/Java/React (Hybrid) 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 to More ❯

Senior Full Stack Developer – Kotlin/Java/React (Hybrid) 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 to More ❯