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37 mobile app developer jobs found

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Contract Spy
Mar 10, 2026
Duration not stated
Mobile App Developer - AI Trainer at DataAnnotation, Remote, From £29.61 an hour
Contract Spy Remote
Join the DataAnnotation team and contribute to developing cutting-edge AI systems, while enjoying the flexibility of remote work and setting your own schedule. We are looking for a proficient Mobile App Developer to help advance AI development. As a member of DataAnnotation’s coding team, you’ll be part of a growing community of over 100,000 professionals — including front-end, back-end, full-stack, machine learning, and other engineers — who are driving real-world impact in AI development. Our platform offers an engaging blend of flexibility and challenge: you’ll work closely with state-of the art AI models to take on programming tasks that include creating and solving challenging coding problems, building beautiful apps with rich functionality, and synthesizing insights through data analysis and visualization. Your work directly contributes to refining intelligent systems that learn, adapt, and evolve. Some team members fit this work alongside a full-time role, while...
Contract Spy
Mar 03, 2026
Hourly/Freelance
Mobile App Developer - AI Trainer at DataAnnotation, Remote, £Hourly Rate
Contract Spy Remote
Join the DataAnnotation team and contribute to developing cutting-edge AI systems, while enjoying the flexibility of remote work and setting your own schedule. We are looking for a proficient Mobile App Developer to help advance AI development. As a member of DataAnnotation’s coding team, you’ll be part of a growing community of over 100,000 professionals — including front-end, back-end, full-stack, machine learning, and other engineers — who are driving real-world impact in AI development. Our platform offers an engaging blend of flexibility and challenge: you’ll work closely with state-of the art AI models to take on programming tasks that include creating and solving challenging coding problems, building beautiful apps with rich functionality, and synthesizing insights through data analysis and visualization. Your work directly contributes to refining intelligent systems that learn, adapt, and evolve. Some team members fit this work...
Contract Spy
Mar 13, 2026
Duration not stated
Senior IOS Developer at Scrumconnect Consulting, Staines-upon-Thames TW18, £Contract Rate
Contract Spy Staines TW18, UK
Job Information Date Opened 12/03/2026 Job Type Contract Work Experience 5+ years Industry Public Sector and Government Salary 400-425 inside ir 35 City Staines Province Surrey Country United Kingdom Postal Code TW18 Job Description About Scrumconnect Consulting Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. With a strong commitment to user-centred design and agile delivery, we continue to deliver innovative digital services that matter. Role Overview We are looking for a Senior iOS Developer to design, build, and maintain high-quality native iOS applications for a UK government client. You will work as part of a multidisciplinary agile team, delivering user-centred mobile...
Contract Spy
Mar 13, 2026
Duration not stated
Senior Android Developer at Scrumconnect Consulting, Staines-upon-Thames TW18, £Contract Rate
Contract Spy Staines TW18, UK
Job Information Date Opened 12/03/2026 Job Type Contract Work Experience 5+ years Industry Public Sector and Government Salary 400-425 inside ir 35 City Staines Province Surrey Country United Kingdom Postal Code TW18 Job Description About Scrumconnect Consulting Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. With a strong commitment to user-centred design and agile delivery, we continue to deliver innovative digital services that matter. Role Overview We are looking for a Senior Android Developer to design, build, and maintain high-quality native Android applications for a UK government client. You will work as part of a multidisciplinary agile team, delivering user-centred...
Contract Spy
Mar 12, 2026
Duration not stated
iOS Engineer - 3 Month Contract - Outside IR35 at Mindera, UK, £Contract Rate
Contract Spy United Kingdom
  Description   Here at Mindera, we are continuously developing a fantastic team, and would love it for you to join us. As an iOS Developer you will be responsible for creating fast, fluid, responsive and reliable mobile applications that provide our customers a rewarding experience. You'll also play a key technical leadership role, working closely with architects, product managers, and cross-functional teams. You'll have an opportunity to participate in the whole development cycle, using modern technologies, architectures and processes. When you join Mindera we welcome you into a fun and politics-free work culture, built on the principles of lean and self-organisation.       You Rock at Swift, Cocoa Touch and other Apple frameworks Being self-driven and working with little supervision towards a common team or company purpose. Creating fluid visual interactions, creating and implementing mobile user experience patterns...
Contract Spy
Mar 12, 2026
Duration not stated
Freelance Android Developer for Digital Asset Marketplace App (Fliprly) at Fliprly, London, £Contract Rate
Contract Spy London, UK
About Fliprly Fliprly is the world’s first and only mobile app dedicated to buying and selling domains, websites, mobile apps, and other digital assets. Our iOS app and web platform are live, and we’re now ready to expand our reach with a robust Android app. Join us on this exciting journey to revolutionize the digital asset marketplace! What We’re Looking For We’re seeking a skilled Android Developer (freelancer or agency) to build the Android version of Fliprly from scratch. You’ll work closely with our existing team and leverage our iOS/web apps as references for functionality and design consistency. Responsibilities Build a high-performance Android app using Java. Translate our iOS design and features into the Android ecosystem. Integrate APIs and backend services (already available). Ensure a smooth, responsive, and bug-free user experience. Requirements Proven experience building Android apps (at least 4 solid live apps). Proficient in...
Contract Spy
Mar 11, 2026
Duration not stated
Senior Front End Developer at Bridebook, Remote, £Competitive Day Rate
Contract Spy Remote
Senior Front-End React Developer At Bridebook, we're digitising the wedding industry! Join us in transforming the wedding planning experience for engaged couples around the world. Full-time Contractor · Remote · Competitive Day Rate Who is Bridebook anyway? Bridebook is a revolutionary wedding planning platform that seeks to make wedding planning an enjoyable, intuitive, and rewarding experience for couples, guests, and industry partners. Launched in the UK, Bridebook has over 1,000,000 planning couples and has been featured in major outlets such as the New York Times, the BBC, and the App Store. After seven years and many iterations later, we have 2 in 3 engaged UK couples and 1 in 3 engaged German couples using Bridebook, and have recently expanded into the French and Irish markets. While we serve a very emotional and creative industry, we are disrupting the wedding industry by leveraging cutting-edge technology to provide seamless and...
Contract Spy
Mar 05, 2026
Hourly/Freelance
Android Developer for Digital Asset Marketplace App at Fliprly, London/Remote, £Freelance Rate
Contract Spy Hybrid (London, UK)
About Fliprly Fliprly is the world’s first and only mobile app dedicated to buying and selling domains, websites, mobile apps, and other digital assets. Our iOS app and web platform are live, and we’re now ready to expand our reach with a robust Android app. Join us on this exciting journey to revolutionize the digital asset marketplace! What We’re Looking For We’re seeking a skilled Android Developer (freelancer or agency) to build the Android version of Fliprly from scratch. You’ll work closely with our existing team and leverage our iOS/web apps as references for functionality and design consistency. Responsibilities Build a high-performance Android app using Java. Translate our iOS design and features into the Android ecosystem. Integrate APIs and backend services (already available). Ensure a smooth, responsive, and bug-free user experience. Requirements Proven experience building Android apps...
Contract Spy
Mar 04, 2026
Duration not stated
Senior Front End Developer at Bridebook, Remote, £Competitive Day Rate
Contract Spy Remote
Senior Front-End React Developer At Bridebook, we're digitising the wedding industry! Join us in transforming the wedding planning experience for engaged couples around the world. Full-time Contractor · Remote · Competitive Day Rate Who is Bridebook anyway? Bridebook is a revolutionary wedding planning platform that seeks to make wedding planning an enjoyable, intuitive, and rewarding experience for couples, guests, and industry partners. Launched in the UK, Bridebook has over 1,000,000 planning couples and has been featured in major outlets such as the New York Times, the BBC, and the App Store. After seven years and many iterations later, we have 2 in 3 engaged UK couples and 1 in 3 engaged German couples using Bridebook, and have recently expanded into the French and Irish markets. While we serve a very emotional and creative industry, we are disrupting the wedding industry by leveraging cutting-edge technology to provide seamless and...
Contract Spy
Feb 26, 2026
Hourly/Freelance
Android Developer for Digital Asset Marketplace App at Fliprly, London/Remote, £Freelance Rate
Contract Spy Hybrid (London, UK)
About Fliprly Fliprly is the world’s first and only mobile app dedicated to buying and selling domains, websites, mobile apps, and other digital assets. Our iOS app and web platform are live, and we’re now ready to expand our reach with a robust Android app. Join us on this exciting journey to revolutionize the digital asset marketplace! What We’re Looking For We’re seeking a skilled Android Developer (freelancer or agency) to build the Android version of Fliprly from scratch. You’ll work closely with our existing team and leverage our iOS/web apps as references for functionality and design consistency. Responsibilities Build a high-performance Android app using Java. Translate our iOS design and features into the Android ecosystem. Integrate APIs and backend services (already available). Ensure a smooth, responsive, and bug-free user experience. Requirements Proven experience building Android apps...
Contract Spy
Feb 25, 2026
Duration not stated
Senior Front End Developer at Bridebook, Remote, £Competitive Day Rate
Contract Spy Remote
Senior Front-End React Developer At Bridebook, we're digitising the wedding industry! Join us in transforming the wedding planning experience for engaged couples around the world. Full-time Contractor · Remote · Competitive Day Rate Who is Bridebook anyway? Bridebook is a revolutionary wedding planning platform that seeks to make wedding planning an enjoyable, intuitive, and rewarding experience for couples, guests, and industry partners. Launched in the UK, Bridebook has over 1,000,000 planning couples and has been featured in major outlets such as the New York Times, the BBC, and the App Store. After seven years and many iterations later, we have 2 in 3 engaged UK couples and 1 in 3 engaged German couples using Bridebook, and have recently expanded into the French and Irish markets. While we serve a very emotional and creative industry, we are disrupting the wedding industry by leveraging cutting-edge technology to provide seamless and...
Contract Spy
Mar 12, 2026
Duration not stated
iPhone/iPad App Tester at Fliprly, Remote, £Contract Rate
Contract Spy Remote
Location: Remote Job Type: Freelance on Hourly Rate. Company Overview: At Fliprly , we are dedicated to delivering world-class mobile applications that prioritize functionality, user experience, and reliability. We’re seeking a detail-oriented and experienced iPhone App Tester to join our team. This role is ideal for someone who is passionate about mobile apps, possesses a sharp eye for detail, and enjoys uncovering bugs and usability issues. Key Responsibilities: Perform comprehensive testing of iPhone and iPad applications, including functionality, features, and UI/UX. Conduct end-to-end app testing, ensuring all features work seamlessly across iOS devices running version 15.0 or later. Test in-app purchase flows to verify successful transactions and error handling. Identify, report, and document bugs, glitches, and inconsistencies with detailed steps and evidence (screenshots, recordings, logs). Collaborate with developers and designers to ensure...
Contract Spy
Mar 12, 2026
Duration not stated
Web Designer – HTML & CSS (Single Page Landing Pages) at Fliprly, Remote, £Contract Rate
Contract Spy Remote
Company: Fliprly.com – The World’s Best Domain Marketplace Portal Location: Remote Employment Type: Freelance/Full-Time/Part-Time (Flexible options available) About Us: Fliprly.com is the world’s leading marketplace for buying and selling domains, websites, and mobile apps. As we continue to expand our platform, we’re looking for a creative and detail-oriented Web Designer to join our dynamic team. Your work will directly impact the user experience by creating stunning single-page landing pages that attract and convert our audience. Job Overview: We are seeking a skilled Web Designer with expertise in HTML and CSS to craft visually appealing and highly functional single-page landing pages. You will be responsible for translating our branding and marketing needs into compelling designs that drive engagement and conversions. Key Responsibilities: Design and develop visually appealing single-page landing pages using HTML and CSS . Ensure...
Contract Spy
Mar 12, 2026
Duration not stated
Contractor - Senior Game Developer - Paper.io2 at Voodoo, London, £Contract Rate
Contract Spy London, UK
About Voodoo Founded in 2013, Voodoo is a tech company that creates mobile games and apps with a mission to entertain the world. Gathering 800 employees, 7 billion downloads, and over 200 million active users, Voodoo is the #3 mobile publisher worldwide in terms of downloads after Google and Meta. Our portfolio includes chart-topping games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz. This position can be Paris-based, Barcelona-based, Amsterdam-based, or fully remote within CET +/-2h. Team Our Gaming team is made up of hybrid-casual, casual, and mid-core experts. Our 'Core' games team supports internal and external studios worldwide in creating, developing, and launching new hit games, whilst our 'Live' games team focuses on delivering higher engagement on our existing and successful games. Joining our Live games team means collaborating with gaming industry experts on globally renowned, enduring games while embracing...
Contract Spy
Mar 10, 2026
6 Months or more
Principal Consultant – Service Now Tech Lead at Stackstudio Digital Ltd, UK wide, 6 Months, £300-£350 per day
£300 - £350 per day
Contract Spy United Kingdom
Job Title:  Principal Consultant Service Now Tech Lead Job Type:  Contract (Inside IR35) Duration: 6 months Work model: Remote Job Summary: In this role, you will be the technical owner and manage a team of developers, assign their tasks and provide technical guidance as needed. Responsibilities You are the technical owner and manage a team of developers, assign their tasks and provide technical guidance as needed. Mentor and lead a team of developers. Participate in requirement discovery with clients, design and develop solutions for the ServiceNow platform, ranging from current feature enhancements and bug fixes to full application suite deployment. Carry out agile sprint-defined development tasks to support release cycles, including execution of development, unit testing, functional testing, and overall peer review of team member work. Reviews design and code per sprint to ensure quality. Creation and customization...
Contract Spy
Mar 10, 2026
Duration not stated
Unity Engineer, Music (Contractor) at Duolingo, London, £Contract Rate
Contract Spy London, UK
Our mission at Duolingo is to develop the best education in the world and make it universally available. But we've got more left to do — and that's where you come in! With over 500 million users, Duolingo is the world's most popular language learning platform. We are rapidly growing our learner base and expanding into new subjects. Come join our Music team and help us build the future of music education. We are looking for a Unity engineer with a gaming background to help us implement our new music course and productionize our existing prototype. You will help build the best possible user experience for our learners through high-quality interactive lessons. Beyond our core learning product, we also offer English proficiency testing with the Duolingo English Test, and are bringing new subjects into the Duolingo app, where people can develop their Math and Music skills. We are passionate about educating our users, making fact-based decisions, and finding innovative...
Contract Spy
Mar 09, 2026
Duration not stated
Fullstack Product Engineer at IconicShift, London, £Contract Rate
Contract Spy London, UK
About IconicShift IconicShift AI is building a platform that turns founder intent into usable strategic outputs — clear strategies, investor-grade pitches, and practical roadmaps. It is based on the experience of Mike Harris, founding CEO of First Direct (the world’s first telephone bank), founding CEO of Egg (the world’s first internet bank), and CEO of Mercury Communications (that created some of the UK’s first mobile and cable networks). Most founders don’t fail because they lack ideas or options. They fail because their thinking drifts and they can’t afford the experienced support they need. Their story changes, priorities multiply, and the business loses its single direction. Most AI approaches just help them fail faster by accelerating rushed decisions. IconicShift works by creating a single source of strategic truth, where every decision is tracked and held to account. It refuses to move forward without explicit acceptance of core strategic bets, ensuring...
Contract Spy
Mar 06, 2026
Duration not stated
Senior Backend Developer at Well Played Games, Leamington Spa, £Contractor Option
Contract Spy Royal Leamington Spa, UK
  Well Played Games is a small studio based in Leamington Spa, UK with a strong track record of collaborating with world-class IP. Founded in 2017, our aim is to build live free-to-play video games across multiple platforms. We are looking for a Senior Backend Developer to join our team and take ownership of development across our live mobile titles. The Role As part of the project’s code team, you will be responsible for the support of the live game, the design and development of new features. You will take full ownership of the backend of a live product and work closely with the whole team to deliver new, major features safely. You will be responsible for the design and development of services to support new game features. You will also be involved in and manage the rest of the team’s backend work by providing technical oversight, support and code reviews. As a senior developer, you will be encouraged to contribute to the analysis and pragmatic...
Contract Spy
Mar 05, 2026
up to 6 Months
UX Designer at CTI Digital, Manchester, 3 Months, £Contract Rate
Contract Spy Manchester, UK
Description About CTI Join 150+ strategists and specialists who refuse to settle, creating bold digital experiences for ambitious brands since 2004. We're a full-service digital agency delivering strategic consultancy, web development, and digital marketing to drive demand online. Using over two decades of industry experience, we provide next-gen solutions as part of lasting partnerships with hundreds of clients from Chester Zoo and Zip World to Balfour Beatty and Mind. What makes us different We break new ground. You'll work on innovative projects using the latest technologies before they hit the mainstream. We celebrate calculated risks and learn fast from every experiment. We get stuck in together. Genuine collaboration across all departments. Your ideas matter here, regardless of your role or how long you've been with us. We stay curious. Continuous learning is essential. You'll have dedicated time and budget for development, working alongside...
Contract Spy
Mar 05, 2026
Duration not stated
Senior Game Developer - Paper.io2 at Voodoo, Remote, £Contract Rate
Contract Spy Remote
About Voodoo Founded in 2013, Voodoo is a tech company that creates mobile games and apps with a mission to entertain the world. Gathering 800 employees, 7 billion downloads, and over 200 million active users, Voodoo is the #3 mobile publisher worldwide in terms of downloads after Google and Meta. Our portfolio includes chart-topping games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz. This position can be Paris-based, Barcelona-based, Amsterdam-based, or fully remote within CET +/-2h.   Team Our Gaming team is made up of hybrid-casual, casual, and mid-core experts. Our 'Core' games team supports internal and external studios worldwide in creating, developing, and launching new hit games, whilst our 'Live' games team focuses on delivering higher engagement on our existing and successful games. Joining our Live games team means collaborating with gaming industry experts on globally renowned, enduring games while embracing...
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