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27 ui ux developer jobs found

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Contract Spy
Feb 17, 2026
Hourly/Freelance
UI/UX 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 UI/UX 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...
Contract Spy
Feb 10, 2026
Hourly/Freelance
UI/UX 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 UI/UX 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...
Contract Spy
Feb 03, 2026
Hourly/Freelance
UI/UX 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 UI/UX 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...
Contract Spy
Jan 27, 2026
Hourly/Freelance
UI/UX 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 UI/UX 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...
Contract Spy
Feb 20, 2026
Duration not stated
App Product Designer at Ember New, Remote, £Contract Rate
Contract Spy Remote (United Kingdom)
The Opportunity   We’re a well-funded pre-seed startup on a mission to improve the happiness and wellbeing of people across the globe.   Ember is a relationship wellness app that enables couples to strengthen and enhance their connection, communicate more effectively, and cultivate healthier partnerships. The app helps couples develop a deeper understanding of one another, while facilitating better communication, resolving conflicts constructively, and strengthening emotional intimacy.   Built on years of relationship coaching experience from co-founder and relationship coach Ellie Baker, and grounded in relationship science, Ember is intentionally designed to meet couples at any stage of their journey– supporting them through the good times, the bad times and the 'just okay, but it could be better' times.   Powered by AI, Ember's platform analyzes a couple's existing communication patterns to deliver personalized...
Contract Spy
Feb 18, 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 16, 2026
up to 6 Months
Senior Front-End Developer - Brand Experience at Mirakl - Labs, London Soho, 3 Months, £Contract Rate
Contract Spy Remote (Soho, London, UK)
About Mirakl Mirakl is the leading provider of eCommerce software solutions. Mirakl's suite of solutions provides enterprises with a transformative way to drive significant growth and efficiency in their online business. Since 2012, Mirakl has been pioneering the platform economy, empowering retail and B2B enterprises with the most advanced, secure and scalable technology to digitize and expand product assortment through marketplace and dropship, improve efficiency in supplier catalog management and payments, personalize shopping experiences, and boost profits through retail media.   Mirakl is trusted by 400+ industry-leading businesses worldwide including Macy's, Decathlon, Best Buy, Airbus, Toyota Material Handling and Sonepar. Headquartered in Paris with another office in Bordeaux and with offices in 7 countries, Mirakl is recognized as a Great Place to Work company.   With more than 350 people, Mirakl Labs teams are mainly based in...
Contract Spy
Feb 16, 2026
up to 6 Months
Mobile App Developer at Medilogic, Remote, 3 Months, £Contract Rate
Contract Spy Remote
Job Overview We are seeking a talented and motivated Application Developer to join our dynamic IT team. The successful candidate will be responsible for designing, developing, and maintaining innovative mobile applications across multiple platforms, including Android and iOS. This role offers an exciting opportunity to work on cutting-edge projects, utilise a broad range of programming languages and frameworks, and contribute to enhancing user experience through effective application development. The position is paid and suitable for individuals with a passion for creating seamless, user-friendly applications. Duties Develop, test, and deploy mobile applications for Android and iOS platforms using languages such as Java, Kotlin, Swift, Objective-C, C#, and JavaScript. Collaborate with cross-functional teams to define application requirements and translate them into technical specifications. Integrate third-party APIs and RESTful services to enhance application...
Contract Spy
Feb 11, 2026
Duration not stated
Senior Front End Developer at Bridebook, Remote, £Competitive Day Rate
Contract Spy Remote
Full job description 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...
Contract Spy
Feb 09, 2026
up to 6 Months
Mobile App Developer at Medilogic, Remote, 3 Months, £Contract Rate
Contract Spy Remote
Job Overview We are seeking a talented and motivated Application Developer to join our dynamic IT team. The successful candidate will be responsible for designing, developing, and maintaining innovative mobile applications across multiple platforms, including Android and iOS. This role offers an exciting opportunity to work on cutting-edge projects, utilise a broad range of programming languages and frameworks, and contribute to enhancing user experience through effective application development. The position is paid and suitable for individuals with a passion for creating seamless, user-friendly applications. Duties Develop, test, and deploy mobile applications for Android and iOS platforms using languages such as Java, Kotlin, Swift, Objective-C, C#, and JavaScript. Collaborate with cross-functional teams to define application requirements and translate them into technical specifications. Integrate third-party APIs and RESTful services to enhance application...
Contract Spy
Feb 04, 2026
Duration not stated
Product Engineer (Full Stack & AI-Native) at Sofa King Digital, Remote, £Contract Rate
Contract Spy Remote (Fleet, England, United Kingdom)
Job Posting: Product Engineer (Full Stack & AI-Native)     Location: Remote (UK-based preferred for timezone alignment) Type: Contract / Freelance (with potential for long-term partnership) Stage: Stealth Mode / Pre-Launch     The Opportunity We are a stealth-mode startup building a premium digital ecosystem designed to solve the Connectivity Paradox in the UK business market. We are bridging the gap between social networking and high-value transactional brokerage for business owners and investors. We are looking for a Product Engineer —not just a ticket-taker, but a builder who understands that code is a means to a business end. You will work directly with the Lead Product Manager/Architect to build, ship, and iterate on our MVP. This is not a traditional dev role. We embrace an Agentic SDLC . We don't want you typing boilerplate; we want you architecting solutions, utilizing AI tools (Copilot, Agents) to accelerate...
Contract Spy
Feb 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 02, 2026
up to 6 Months
Mobile App Developer at Medilogic, Remote, 3 Months, £Contract Rate
Contract Spy Remote
Job Overview We are seeking a talented and motivated Application Developer to join our dynamic IT team. The successful candidate will be responsible for designing, developing, and maintaining innovative mobile applications across multiple platforms, including Android and iOS. This role offers an exciting opportunity to work on cutting-edge projects, utilise a broad range of programming languages and frameworks, and contribute to enhancing user experience through effective application development. The position is paid and suitable for individuals with a passion for creating seamless, user-friendly applications. Duties Develop, test, and deploy mobile applications for Android and iOS platforms using languages such as Java, Kotlin, Swift, Objective-C, C#, and JavaScript. Collaborate with cross-functional teams to define application requirements and translate them into technical specifications. Integrate third-party APIs and RESTful services to enhance application...
Contract Spy
Jan 28, 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 19, 2026
Hourly/Freelance
iPhone/iPad App Tester at Fliprly, Remote, £Hourly 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...
Contract Spy
Feb 19, 2026
Hourly/Freelance
Web Designer – HTML & CSS (Single Page Landing Pages) at Fliprly, Remote, £Freelance 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...
Contract Spy
Feb 17, 2026
Duration not stated
Unity Engineer at Duolingo, Remote, £Contractor Rate
Contract Spy Remote (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
Feb 12, 2026
up to 6 Months
Product Manager - External Contractor at Whiteshield, Remote, 2-3 Months, £Contractor Rate
Contract Spy Remote (United Kingdom)
Note: This is an External Contractor Agreement Agreement Type: 2-3 Months (option to extend / become permanent) Location: Remote (UAE Hours) Whiteshield is a global policy advisory and AI economics firm known for our ability to respond to global challenges rapidly and incisively. We use the most advanced tools and technology and combine them with our team of leading international experts to engage decision-makers in tackling society 's most significant challenges. We are recognized for our rapid decision support, innovation, data science algorithms and deep policy expertise. We are specialists in ʺconnecting the dots ʺ between policy, business and technology. Whiteshield X is Whiteshield's product business, hosting our PaaS and SaaS product offering. Partnered with Google Cloud, we bring advanced solutions to governments around the world to drastically improve citizen outcomes in areas such as employment, trade, and education. We develop a host of different SaaS modules...
Contract Spy
Feb 12, 2026
Hourly/Freelance
Web Designer – HTML & CSS (Single Page Landing Pages) at Fliprly, Remote, £Freelance 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...
Contract Spy
Feb 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...
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