139 web developer jobs found in London

Who Are We? Xcelirate develops technologically-advanced platforms which are accessed by thousands of users every minute! We are proud to offer a workplace where the sharpest developers come together to strategically plan and swiftly execute practices which see us maintain our existing market dominance and attain global expansion. We owe our success to our customers who have seen us grow across a decade, and our talented team who have made that growth possible!   What are we looking for? You're a Principal-Level Engineer first. The tech lead title is almost incidental. It just means you're the person the team orbits around, because that's what happens naturally when you're the one who understands the system most deeply and keeps the clearest head under pressure. The 10% that's people management fits inside your engineering work, not alongside it. You hire, you steer, you unblock, but you do it the way a strong engineer does everything: with good...

We have an exciting opportunity for experienced Java developers to join our team! You will have a passion for software development and an excellent understanding of how to define and deliver solutions iteratively and collaboratively. You will be involved in all areas of delivery, with the technical gravitas to mentor and inspire the development team; playing an integral part in helping them continuously improve by sharing your own knowledge, experience and insights. You will be confident in challenging business requirements to ensure you are continuously delivering the best possible outcome, harnessing innovation and driving the adoption of new technologies to deliver business value. Your vision and ambition will contribute to shaping our online technology roadmap, influencing our future technical direction and balancing passion with precision to deliver exceptional online service and solutions for our customers.   This is an initial 12 month contract that sits...

Full Stack Developer (Java +Angular) London, UK (Hybrid – Minimum 3 Days per Week Onsite) Contract (Inside IR35) : 12+ Months     Key Responsibilities Design, develop, test, and maintain full-stack web applications. Build responsive and intuitive user interfaces using Angular. Develop robust RESTful APIs and backend services using Java and Spring Boot. Work with MongoDB, SQL Server, and/or Snowflake to design and optimize data solutions. Collaborate with Product Owners, Architects, QA, and DevOps teams throughout the software development lifecycle. Write clean, maintainable, and well-tested code following industry best practices. Troubleshoot production issues and optimize application performance. Participate in code reviews and contribute to technical design discussions.   Required Skills & Experience Strong commercial experience as a Full Stack Developer. Expert knowledge of Angular....

Who Are We? Xcelirate develops technologically-advanced platforms which are accessed by thousands of users every minute! We are proud to offer a workplace where the sharpest developers come together to strategically plan and swiftly execute practices which see us maintain our existing market dominance and attain global expansion. We owe our success to our customers who have seen us grow across a decade, and our talented team who have made that growth possible!   What are we looking for? You're a Principal-Level Engineer first. The tech lead title is almost incidental. It just means you're the person the team orbits around, because that's what happens naturally when you're the one who understands the system most deeply and keeps the clearest head under pressure. The 10% that's people management fits inside your engineering work, not alongside it. You hire, you steer, you unblock, but you do it the way a strong engineer does everything: with good...

Essential Skills & Experience: · Proven experience in UI/UX design for self-service platforms or similar digital products. · Proficiency in design tools such as Figma, Adobe XD, or Sketch. Strong knowledge of responsive design principles and web/mobile best practices. · Experience conducting user research and usability testing to drive design improvements. · Familiarity with accessibility standards (e.g., WCAG 2.1) and inclusive design principles. · Ability to work in an Agile environment, delivering iterative design solutions in collaboration with cross-functional teams. · Excellent communication skills to articulate design decisions and gather stakeholder feedback effectively Familiarity with GDS Service Standards and the Digital Service Assessment process Work with clients to design and develop digital services that are user-friendly, accessible, and compliant with GDS standards. Lead the development...

Full Stack Developer (Java +Angular) London, UK (Hybrid – Minimum 3 Days per Week Onsite) Contract (Inside IR35) : 12+ Months     Key Responsibilities Design, develop, test, and maintain full-stack web applications. Build responsive and intuitive user interfaces using Angular. Develop robust RESTful APIs and backend services using Java and Spring Boot. Work with MongoDB, SQL Server, and/or Snowflake to design and optimize data solutions. Collaborate with Product Owners, Architects, QA, and DevOps teams throughout the software development lifecycle. Write clean, maintainable, and well-tested code following industry best practices. Troubleshoot production issues and optimize application performance. Participate in code reviews and contribute to technical design discussions.   Required Skills & Experience Strong commercial experience as a Full Stack Developer. Expert knowledge of Angular....

Who Are We? Xcelirate develops technologically-advanced platforms which are accessed by thousands of users every minute! We are proud to offer a workplace where the sharpest developers come together to strategically plan and swiftly execute practices which see us maintain our existing market dominance and attain global expansion. We owe our success to our customers who have seen us grow across a decade, and our talented team who have made that growth possible!   What are we looking for? You're a Principal-Level Engineer first. The tech lead title is almost incidental. It just means you're the person the team orbits around, because that's what happens naturally when you're the one who understands the system most deeply and keeps the clearest head under pressure. The 10% that's people management fits inside your engineering work, not alongside it. You hire, you steer, you unblock, but you do it the way a strong engineer does everything: with good...

Senior Software Engineer – RUST   Contract initial 12 months Outside ir35 Hybrid or Remote   Overall Ambition   Solve some of today's most complex hospitality challenges by creating innovative, scalable technology using a modern, open technology stack. Help shape the technical direction of our products while delivering exceptional customer experiences across the USA.   What We're Looking For   We're looking for a Contract Senior Software Engineer to join our passionate, lean, agile, fast-growing and evolving technology team on a permanent basis.   You'll be an experienced engineer who enjoys solving difficult technical problems, building highly scalable systems and helping those around you become better engineers. You'll be comfortable owning complex initiatives from design through to production, influencing technical direction and driving engineering excellence across multiple teams....

Essential Skills & Experience: · Proven experience in UI/UX design for self-service platforms or similar digital products. · Proficiency in design tools such as Figma, Adobe XD, or Sketch. Strong knowledge of responsive design principles and web/mobile best practices. · Experience conducting user research and usability testing to drive design improvements. · Familiarity with accessibility standards (e.g., WCAG 2.1) and inclusive design principles. · Ability to work in an Agile environment, delivering iterative design solutions in collaboration with cross-functional teams. · Excellent communication skills to articulate design decisions and gather stakeholder feedback effectively Familiarity with GDS Service Standards and the Digital Service Assessment process Work with clients to design and develop digital services that are user-friendly, accessible, and compliant with GDS standards. Lead the development of...

Location London Business Line Enabling Functions Job Type Contract Date published 10-Aug-2026 Req # 24569 Job description   Job Title: IT Asset Management Engineer (Hardware) Location: London (full-time on-site) Duration: 12 months Contract Start Date: ASAP August 2026 Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for a proactive and customer-focused IT Engineer...

Why Keyrus, Why Now! Keyrus is an international group of 2,800 consultants and experts across 28 countries, built on a single conviction: AI does not transform businesses. Architected intelligence does. For more than 30 years, we have been building the data foundations that make intelligent systems work — designing the Operating System of the intelligent enterprise, where intelligence is embedded into the core of business processes to create sustainable value: we operationalise intelligence. AI does not replace humans. It repositions us to a place no system can follow: understanding, deciding, designing, and creating. At Keyrus, you will not just develop skills — you will develop judgment. Your expertise sharpens with every system you architect, every client challenge you solve, and every deployment that compounds on the last. Over time, you grow into one of the rarest professionals of the intelligence era: someone who bridges data, AI, and human...

World Wide Technology (WWT) is a global technology integrator and supply chain solutions provider. Through our culture of innovation, we inspire, build, and deliver business results, from idea to outcome.   World Wide Technology (WWT) is looking for an experienced FullStack Developer with strong expertise in Java, Agile delivery, software architecture, and AI-assisted development.   The ideal candidate combines hands-on engineering, technical leadership, solution design, and modernization of legacy applications while driving automation and innovation across development teams.   This is a contract Role & Inside IR35   FullStack Developer   Contract Duration: 6 months contract   Location: London, United Kingdom (Hybrid with 2- 3 days a week)   Key Responsibilities Drive product strategy, technical roadmap, and solution design using modern technologies and best practices. Lead...

Company Description Join the world’s largest kdb+ Consultancy where every query matters, every millisecond counts and every system you build shapes the future of data-driven finance. At Data Intellect , we thrive on solving complex data challenges in high-stakes environments. We’re a team of engineers, problem-solvers and collaborators who believe in pushing boundaries, not egos. If you're a proficient kdb+ developer ready to lead, innovate and make an impact, we want to hear from you. Job Description As a Senior kdb+ Engineer at [DI] you’ll be at the forefront of delivering high-performance, scalable solutions for some of the world’s most data-intensive financial institutions. You’ll: Lead technical delivery on client projects, setting the standard for quality and performance. Design and implement robust kdb+ architectures that handle billions of rows of time-series data. Collaborate with quants, traders, and analysts to...

About This Role Bounteous is a global AI Services firm where agentic engineering and human experience converge to deliver transformative business outcomes for the enterprise. We help organizations design, build, and scale AI-driven products, platforms, and processes. With more than 5,000 team members worldwide, Bounteous delivers AI that sticks, powering adoption and outcomes that move organizations from experimentation to true transformation. Bounteous is backed by New Mountain Capital, a New York-based growth-oriented investment firm that emphasizes business building.   Job Description – Change Management Lead 6 Months contract Role Overview We are seeking an experienced Change Management Lead to drive the people, process and organisational change agenda across complex business and technology transformation programmes within the telecommunications sector. The role will be responsible for developing and executing an...

Location: London 1-2 days a week. Department: Engineering Employment Type: Contract Contract Length: 6 months (with potential for extension) About YLD: Our goal is to help our clients keep moving forward. We work with them to build the skills and capabilities they need to stay ahead of the competition, and we know our success only happens when they succeed. We’re a team of curious, talented people, and we’re committed to making YLD a place where great people want to work, grow, and stay. We’re a remote-first consultancy specialising in software engineering, product design, and data. Our teams are based across London, Lisbon, and Porto, and we create digital solutions that continue to deliver value long after our work is done. About the role: As a Senior Software Engineer at YLD, you’ll be part of a client team building innovative products. We’re looking for someone curious, passionate, driven, and...

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 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 exciting new entrepreneurial ventures. With over seven...

Job title: AI & Automation Director Contract Type: Freelance, 3-4x days per week, 3x months - with potential to extend Location: Shoreditch, London Reporting into: Operations Director Hybrid/ Remote: WFH Monday & Friday. In the office Tuesday-Thursday ABOUT US Seen Connects is one of the UK's leading influencer and social agencies. We partner with some of the world's most recognisable brands to create campaigns that drive real business results. We're entering the next phase of our growth and are making a significant investment in AI, automation and operational excellence. Our ambition is not simply to adopt AI tools, but to continue building an AI-enabled agency that operates smarter, moves faster and scales more efficiently than our competition. We're looking for an experienced AI & Automation Director to lead that work on a freelance basis.   THE ROLE This is a senior role, helping us shape and deliver the agency's...

Business Analyst - Wealth Target Operating Model (TOM)   Wealth Proposition | 6 month Contract | Outside IR35 | Market rate | Hybrid Working   Investec is progressing a significant growth agenda within its UK Private Client franchise to deliver our ambition to scale a high-touch, advice-led proposition that combines private banking, wealth capabilities, digital access and the wider One Investec ecosystem. As part of this, the business is developing a broader UK Wealth proposition that will require robust, client-centred operational foundations across onboarding, servicing, fulfilment, controls and governance.   This requires a Business Analyst with strong Target Operating Model experience to help define how the proposition will work across teams, governance, service ownership, controls and cross-functional interfaces. The programme has reached a point where decisions on proposition, operating model design and platform and operations...

Java and Azure Developer : Contract Role London, England, United Kingdom WPP is the trusted growth partner for the world’s leading brands.  We unite cutting-edge media intelligence and data solutions, world-class creativity, next-generation production, transformative enterprise solutions and expert strategic counsel in a single company – powered by exceptional talent and our agentic marketing platform, WPP Open, to help our clients navigate change, capture opportunity and deliver transformational growth.    We work with the world's most valuable brands and have global reach across 100+ markets, with deep local expertise.   Our people are the key to our success. We're committed to fostering a culture of creativity, belonging and continuous learning, attracting and developing the brightest talent, and providing exciting career opportunities that help our people grow.    For more information,...

We are urgently looking for an experienced Technical Lead , Hertfordshire ( Contract ) with experience in Postilion development and ATM/payment switching solutions within the banking domain. The successful candidate will provide technical leadership, design and develop enterprise payment solutions, support mission-critical transaction systems, and work closely with cross-functional teams to deliver secure, high-performing banking applications. Key Skills:- 7+ years of experience in Postilion Development within the banking and payments domain. Strong expertise in ANDC, ISO8583, NDC+, D912 message formats, and EMV transaction processing. Hands-on experience with Wincore, JavaScript, and CSS for application development and support. Proven experience in ATM software, payment switching, and financial transaction processing. Ability to lead technical teams, conduct code reviews, and mentor developers on best practices. Experience in designing, developing,...