Join SumUp as a Senior Android Engineer, where you'll play a pivotal role in developing our dynamic merchant-focused ecosystem. This is your chance to design and enhance high-impact solutions—such as Kiosks, Kitchen Display Systems (KDS), Customer Facing Displays (CFD), and POS peripherals—that support intricate retail and restaurant operations globally. In this position, you'll seamlessly integrate hardware and software, delivering exceptional experiences for millions of merchants and their clientele.Your Responsibilities:Lead the design and expansion of Android-based merchant solutions, specifically tailored for self-service Kiosks and specialized point-of-sale interfaces.Enhance and develop impactful features that elevate the experience for both merchants and consumers across a diverse range of products.Assist in our transition to Kotlin Multiplatform (KMP) to streamline business logic across various mobile platforms.Craft maintainable, accessible, and high-performing user interfaces utilizing Jetpack Compose.Enhance product reliability through the implementation of comprehensive testing frameworks and increased automated QA coverage for our hardware-integrated software.Work collaboratively with cross-functional teams to deliver integrated features that align with the requirements of global enterprise partners.Conduct code reviews, uphold architectural standards, and guide fellow engineers in the best practices for developing reusable UI components.

Our Story Welcome to Zopa! Since our inception in 2005, we have pioneered the peer-to-peer lending space, and in 2020, we proudly launched Zopa Bank. Our mission is to reshape the financial landscape by prioritizing our customers' needs and preferences. We are dedicated to creating a banking experience that is accessible, empowering, and innovative. Discover more about our exciting offerings at Zopa.com! We celebrate our remarkable achievements, thanks to our incredible team. Recognized not just for industry accolades, we have also been named among the top three Most Loved Workplaces in the UK. If you thrive on tackling unconventional challenges, embrace innovative thinking, and are motivated by the desire to make a significant impact, Zopa is the place for you. Join us and make a difference! Want to see our journey? Follow us on Instagram @zopalife.About the TeamWe are on an exciting journey to enhance our mobile application, and we are seeking a talented individual to assist in developing our new Android app, utilizing Kotlin.As part of our Mobile Platform team, you will be instrumental in shaping the app's architecture, shared capabilities, libraries, core experiences, and analytics infrastructure. The team is a vital contributor to Zopa’s mobile community and plays a key role in advancing our mobile technology.With an aspiration to become Britain's leading bank, we have recently unveiled the Zopa Account — a highly engaging product aimed at the mass market. Our mobile app serves as the primary touchpoint for our customers, and it must be high-performing, dependable, and user-friendly. Therefore, we are investing significantly in the quality and evolution of our mobile technology.Currently, our app is developed using React Native, but we are progressively adopting native capabilities in Swift and Kotlin. We are in the midst of a comprehensive transformation of the Android experience, transitioning towards a more native approach, and we invite you to join us on this exciting journey.

Join our dynamic team at dev2 as a Senior Software Engineer specializing in Android-Hybrid applications. In this role, you will leverage your expertise to design, develop, and optimize high-performance applications that enhance user experience. You will collaborate with cross-functional teams to implement innovative solutions that meet the needs of our clients.

Are you a Kotlin aficionado ready to influence the future of artificial intelligence? As large-scale language models progress from mere chatbots to sophisticated developer assistants that can tackle complex software systems, the need for high-quality engineering data becomes paramount. Your expertise in coding will be instrumental in training tomorrow's AI to assist developers in solving real-world challenges more efficiently and accurately.We are seeking passionate Kotlin specialists who can transform real-world engineering scenarios—like bug reports or feature requests from a Git repository—into clean, efficient, and idiomatic solutions using the Kotlin programming language. You will be responsible for crafting high-quality code patches that embody modern Android development practices, ensuring technical correctness, maintainability, and clarity.Hands-on experience with modern Android and Kotlin development is essential, including proficiency in Jetpack Compose, Kotlin Coroutines, and key Jetpack libraries such as Room, WorkManager, Datastore, ViewModel, and Hilt. Familiarity with build.gradle configurations, dependency management, and networking libraries such as OkHttp, Retrofit, and Coil is also crucial. Experience with Android multimedia tools (CameraX, ExoPlayer, Media3) would be a distinct advantage.In your day-to-day activities, you will assess AI-generated code, rectify errors, implement optimized Kotlin solutions, and document best practices that showcase modern Android design patterns and coding conventions.A strong foundation in Android software development is required, with proven experience in building and maintaining production-level Kotlin applications. Clear and structured communication, coupled with the ability to articulate technical decisions, is paramount.We offer a competitive pay rate starting at $35 per hour, with the final rate being determined based on your experience, expertise, and geographic location. As a contractor, you are expected to provide a secure computer and high-speed internet; please note, company-sponsored benefits such as health insurance and PTO do not apply.

Join xAI as a Senior Android Engineer, where you'll collaborate with a dynamic team dedicated to developing groundbreaking AI applications that enhance user experiences. You'll be instrumental in crafting innovative mobile solutions that seamlessly integrate advanced technology with user-centric design, ensuring our products resonate deeply with users.

Join Our Team as an Android Developer!Location: London (E1)We are a pioneering dating app company on the lookout for exceptional iOS and Android developers to join our dynamic team.As a forward-thinking tech start-up, our product is at the heart of what we do. We adopt a unique agile methodology that allows us to release updates and iterate quickly, delivering new features to our users an impressive average of twice a week.We pride ourselves on innovation, having launched several industry-first features such as Selfie Verification, Likes You as standard, Change Swipe, and more. Our exciting roadmap promises even more groundbreaking developments in the future.

Join Our Team as an Android Engineer!At Sporty, we are on the lookout for a talented Android Engineer who is passionate about leveraging cutting-edge technologies and frameworks to create exceptional user experiences for our extensive user base.Our Technology Stack:Languages: Java, KotlinArchitecture: MVVMNetworking: Retrofit, OkHttp, Protocol BuffersDependency Injection: Dagger 2CI/CD: JenkinsOther Tools: Android JetPack, Glide, Git, ExoPlayerYour Role:Collaborate with Product Managers, Designers, and Backend Engineers to design and deliver high-quality Android products.Develop end-to-end app features including networking, persistence, business logic, and user interface.Create efficient and reusable mobile components and architect reliable, scalable solutions.Identify areas for improvement and advocate for mobile best practices.Analyze and optimize application code for quality and performance.Mentor junior team members to enhance their skills.

Role overview flohealth seeks a Senior or Lead Android Engineer based in London. The role focuses on developing and enhancing mobile apps that support users in managing their health. This position combines hands-on Android development with technical leadership responsibilities. What you will do Collaborate with designers, product managers, and fellow engineers to deliver new Android features and improvements Design, develop, and maintain Android applications, emphasizing usability and strong performance Influence technical decisions and contribute to the architecture of both new and ongoing projects Mentor junior engineers and share knowledge of best practices within the team Requirements Significant experience building and releasing Android applications Deep knowledge of Android frameworks and design patterns Comfort working collaboratively in cross-functional teams Background in mentoring or leading engineers is considered an advantage

Role Overview AND Digital is hiring a Senior Java / Kotlin Engineer to join the team in London. This is a hybrid role, requiring on-site presence two days per week in either Leeds or London. About AND Digital Since 2014, AND Digital has worked with organizations to deliver digital products and strengthen digital teams. Our regional 'Clubs' model helps us build close partnerships with clients, providing dedicated, local support. Today, over 1,300 people work across our Clubs in the UK, Europe, and the USA. The company continues to grow organically, with plans to expand globally. AND Digital aims to close the digital skills gap and deliver lasting impact for clients and their teams. What You Will Do Work within a cross-functional team of developers, technical product owners, and testers to build JVM applications using Test Driven Development and Pair Programming. Lead system design and implementation, considering the broader context and looking for ways to improve systems and practices. Mentor and coach team members. What We’re Looking For Extensive hands-on experience in Java or Kotlin (back-end), with at least 5 years of professional development. Strong background in Test Driven Development (minimum 3 years) and an interest in Pair Programming. Experience working in cross-functional, agile teams. Inclusion and Flexibility AND Digital is an equal opportunity employer. Applications are encouraged from women, ethnic minorities, and individuals with disabilities. Flexible working arrangements are considered, depending on the requirements of the role. Reasonable adjustments are made to accommodate individual needs.

Join Lendable on Our MissionLendable is dedicated to revolutionizing the way people access credit and save money with cutting-edge technology. As one of the leading fintech companies globally, we have made remarkable strides:Recognized as one of the UK’s newest unicorns, with a dynamic team exceeding 700 members.Ranked among the fastest-growing tech companies in the UK.Maintained profitability since 2017.Supported by prestigious investors such as Balderton Capital and Goldman Sachs.Highly rated by our customers, boasting a 4.9 rating on Trustpilot from thousands of reviews.To date, we have completely reimagined the Big Three consumer finance products: loans, credit cards, and car finance. Our goal is to deliver funds to our customers in minutes rather than days.As we expand rapidly, we are setting our sights on the two largest Western markets (the UK and US), where trillions of dollars in financial products are managed by traditional banks utilizing outdated systems and cumbersome processes.Your Opportunity to Make an ImpactEmbrace Ownership: You will have the authority to make decisions that significantly influence the trajectory and success of Lendable from day one.Collaborate with Talented Teams: Work alongside exceptional individuals who are driven to solve problems and innovate beyond conventional solutions.Develop Cutting-Edge Technology: Build state-of-the-art solutions internally, leveraging new data sources, machine learning, and AI to optimize processes.About the Role:We are excited to welcome a Senior Kotlin Engineer to our expanding team. This role offers a unique opportunity to contribute fresh insights and expertise to our design discussions, aiding in the development of sophisticated solutions to complex engineering challenges during our growth phase. Our tech team, currently comprising around 80 skilled professionals, has been pivotal in transforming the finance landscape with our next-generation lending platform.

Motorway is looking for a Senior Android Engineer to join the team in London. This role centers on developing and refining mobile applications that help both the business and its users. Daily work brings close collaboration with designers, product managers, and fellow engineers to deliver reliable, user-friendly Android features. Key responsibilities Design, build, and maintain Android applications for Motorway Partner with cross-functional teams to launch new features and enhance existing ones Take part in architectural decisions, code quality discussions, and user experience improvements Collaboration and impact This position involves regular teamwork across disciplines, ensuring that the Android experience aligns with Motorway’s goals and user needs. Input on architecture and user experience is valued at every stage. Location The role is based in London.

Company OverviewCIMAR UK Ltd, now a part of DeepHealth, stands at the forefront of the SaaS healthcare industry, offering cutting-edge cloud-based image management solutions. Our innovative technology enables healthcare organizations to optimize image management processes, enhance patient care, and streamline workflows through seamless integration and actionable data insights.Job PurposeAs a Backend Developer (Kotlin/Java) with CIMAR, your role will involve:Collaborating with senior leadership and cross-functional teams to design and implement subsystems and product features that align with our strategic goals.Taking ownership of specific subsystems or feature areas, contributing through the entire development lifecycle from conception to deployment.Ensuring solutions comply with established engineering standards, best practices, and quality benchmarks.Participating in code reviews and quality assurance processes to uphold code quality, reliability, and consistency.Contributing to technical documentation and knowledge sharing to support long-term maintainability and onboarding processes.Essential Duties and ResponsibilitiesYour responsibilities will include:Building and supporting backend services in Kotlin for a web UI and various remote gateways.Designing APIs and data flows with a focus on reliability, security, and clarity.Contributing to practical architectural decisions and shaping backend patterns and standards.Working with healthcare standards and integrations, including DICOM and HL7.Participating in code reviews and quality assurance to maintain code integrity and reliability.Producing and maintaining technical documentation to facilitate future maintainability and onboarding.

Collaboration Fuels Our Innovation. Roku is Transforming Television ViewingAs the leading TV streaming platform across the U.S., Canada, and Mexico, Roku aims to revolutionize how viewers engage with their televisions globally. Pioneering the concept of streaming, our mission centers on creating a cohesive TV ecosystem that connects viewers to their preferred content, empowers content creators to build substantial audiences, and offers advertisers unprecedented engagement opportunities.From day one at Roku, your contributions will be valued, as we are a dynamic public company that thrives on your active participation. Join us to delight millions of global streamers while gaining invaluable experience across diverse disciplines. About the RoleIn the role of Senior Software Engineer, Android on the Roku Mobile App team, you will influence how millions of users interact with their Roku Streaming Devices. Your focus will be on developing intuitive, robust, and high-performance Android applications that enable users to manage their Roku devices seamlessly from TVs to Players and beyond.This position allows you to work with a cutting-edge tech stack, including Kotlin, Compose, and Google's latest frameworks. You will collaborate closely with design, product, and cross-functional engineering teams to innovate features, enhance performance, and streamline smart home interactions.We seek individuals driven by curiosity and initiative, who are excited to take ownership of features while fostering a collaborative team environment. About the TeamYou will become part of a talented, high-performing team known for delivering outstanding results. We are searching for someone who can help us maintain this momentum and continue producing high-quality applications as we expand.Given our global user base, we have built a reputation for products that function seamlessly right out of the box. This success is intentional, as we are dedicated to ensuring our products are not only intuitive but also obvious to use. What You’ll Be Doing

Join Our Team!About the RoleWe are on the lookout for a talented Senior Android Software Engineer to be a key player in our Unified Modules team. This position is nestled within the Core Products and Experiences domain, where you will be tasked with the development and enhancement of a suite of SDKs and libraries utilized by various teams across FanDuel Technology. This team is highly visible and is working on pivotal initiatives within the organization.We seek engineers who not only possess technical prowess but also demonstrate empathetic communication and a strong commitment to continuous improvement. The ideal candidate will be skilled at proposing practical solutions, adept at breaking down tasks into manageable, iterative deliveries, and enthusiastic about learning and mentoring others. As part of this dynamic team, you will contribute to the development of libraries for Android, with opportunities to engage in iOS and Web projects as well. Your technical insights will empower teams across the organization to leverage our SDKs effectively and reliably.As a growth-oriented company, we offer ample opportunities for professional development and upward mobility.

Company OverviewCIMAR UK Ltd, a proud member of DeepHealth, stands as a premier provider in the Software-as-a-Service (SaaS) healthcare landscape. We specialize in cutting-edge cloud-based image management solutions that empower healthcare organizations to enhance their image management processes, improve patient care, and streamline workflows through seamless integration and actionable data insights.Job PurposeAs a Backend Developer (Kotlin/Java) at CIMAR, your key responsibilities will include:Collaborating with senior leadership and cross-functional teams to design and implement subsystems and product features that align with strategic objectives.Owning specific subsystems or feature areas, contributing throughout the entire development lifecycle from concept through build, testing, and deployment.Ensuring that developed solutions adhere to established engineering standards, best practices, and quality guidelines.Engaging in code reviews and quality assurance processes to maintain exceptional code quality, reliability, and consistency.Contributing to technical documentation and knowledge sharing to facilitate long-term maintainability and onboarding processes.Essential Duties and ResponsibilitiesYour responsibilities will encompass:Building and maintaining backend services in Kotlin to support a web-based UI and various remote gateways.Designing APIs and data flows with a strong focus on reliability, security, and clarity.Participating in pragmatic architectural decisions and helping to shape backend patterns and standards.Collaborating with healthcare standards and integrations, including DICOM and HL7.Engaging in code reviews and quality assurance activities to uphold code quality and consistency.Producing and maintaining technical documentation to enhance maintainability and facilitate onboarding.

We are seeking a highly skilled Contract Senior Java / Kotlin Engineer to join our dynamic team.Work Location: On-site, 2 days per week in Spitalfields, LondonKey Requirements: Proven expertise in Java or Kotlin (back-end development) and a strong commitment to Test-Driven Development (TDD).Expected Start Date: Mid MarchAbout Us:At AND Digital, we are a forward-thinking tech company dedicated to enhancing digital delivery and bridging the digital skills gap. Since our inception in 2014, we have empowered organizations to create superior digital products and foster robust digital teams. We pride ourselves on the impactful nature of our work, making a significant difference for our clients through our regional offices (referred to as ‘Clubs’), which enable us to build strong, lasting partnerships. This model has not only driven our clients' success but has also facilitated our remarkable organic growth, expanding our team to over 1,300 professionals across the UK, Europe, and the USA, with ambitious plans for global expansion in the coming years.Join us on our mission to close the global digital skills gap!Your Role:Collaborate within a cross-functional team comprising software developers, technical product owners, and testers, all aligned towards developing JVM applications using Test-Driven Development and Pair Programming.Lead the design and implementation of our systems with a clear understanding of the context and purpose behind each project, while continually seeking opportunities to enhance our systems and workflows.Provide mentorship and coaching to fellow team members.Possess extensive knowledge of Java or Kotlin programming languages (5+ years of experience).Demonstrate in-depth knowledge and hands-on experience working within a cross-functional, agile development team.Have at least 3 years of practical experience in Test-Driven Development and a keen interest in Pair Programming.Equal Opportunities Commitment:We are proud to be an equal opportunity employer and welcome applications from all qualified individuals. We actively encourage applications from women, ethnic minorities, and individuals with disabilities. We are open to discussing flexible working arrangements, depending on the specific requirements of the role. Where reasonable adjustments are required, we will make every effort to accommodate them.

About hyperexponential hyperexponential builds AI-driven software for the insurance sector, helping companies make critical decisions in a $7 trillion industry. The platform supports processes ranging from rocket launches and autonomous vehicle deployments to disaster recovery. Backed by a16z, Highland Europe, and Battery Ventures, hyperexponential partners with nearly 50 major insurers, processes billions in premiums, and has maintained a zero churn rate. The company’s platform has grown from a single product into a suite of tools supporting every stage of pricing and underwriting. AI is central to this work, powering projects like a domain-specific peer programmer for insurance and reimagined industry workflows. At hyperexponential, impact comes from the challenges tackled and the discipline shown, not just job titles or tenure. The team values growth, resilience, and collaboration among peers who push each other to achieve their best work. About the Analytics Team The Analytics team designs and builds the data systems that help insurers turn complex datasets into actionable insights. Their work enables underwriters and actuaries to make informed decisions on significant risks by transforming raw portfolio data into practical intelligence. Role Overview: Senior Software Engineer (Kotlin) - Analytics Team This Senior Backend Engineer role focuses on architecting and developing the foundational data systems for next-generation insurance analytics. The position offers a greenfield environment, where responsibilities include designing distributed data solutions from the ground up, building scalable ingestion pipelines, and creating infrastructure that gives clients a data-driven edge. Engineers in this role work on sophisticated technical challenges and collaborate closely with experienced product and engineering colleagues, directly impacting business outcomes. Location London

About xAIAt xAI, our mission is to develop AI systems that accurately comprehend the universe and support humanity’s quest for knowledge. Our dedicated team is small yet highly driven, focused on achieving engineering excellence. We invite individuals who are eager to challenge themselves and thrive on curiosity. Embracing a flat organizational structure, we encourage hands-on contributions towards our mission. Initiative and consistent excellence are rewarded with leadership opportunities. Strong communication skills are essential for sharing knowledge concisely and effectively with team members. About the RoleWe are on the lookout for a talented Android engineer to join our impactful team focused on developing the most valuable AI application in the world, defined by the positive effect it has on users. You will have the opportunity to craft innovative mobile experiences, merging technical expertise with a strong product vision to create outstanding solutions that resonate with users.Your responsibilities will include tackling critical product or technical challenges at any given time.

Join Lendable's Innovative TeamLendable is on a transformative journey to develop the most advanced technology that empowers individuals to secure credit and save money efficiently. As one of the fastest-growing fintech companies in the UK, we are proud to have:Established ourselves as a unicorn with a talented team of over 700 professionals.Achieved profitability since 2017.Received backing from prestigious investors, including Balderton Capital and Goldman Sachs.Earned exceptional customer satisfaction ratings, holding a 4.9-star rating on Trustpilot.We have successfully reimagined the core consumer finance products: loans, credit cards, and car finance. Our mission is to expedite access to funds, ensuring customers receive money within minutes rather than days.As we scale our operations, we are targeting the two largest Western markets (UK and US) where traditional banks still use outdated systems and cumbersome processes.Your RoleWe are excited to invite a Senior Kotlin/JVM Engineer to our dynamic team. This position offers a unique opportunity to contribute your expertise and fresh perspectives to our design processes. You will play an integral role in crafting elegant solutions to complex engineering challenges within our innovative fintech platform. Join a tech-savvy team of around 80 engineers who are dedicated to reshaping the future of finance.