23 web developer jobs found in London

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...

Codurance is a global software professional services consultancy, helping clients continuously deliver value through the adoption of quality practices and technical excellence. Software craftsmanship is at the heart of everything we do. We build well-crafted software and help development teams get better at continuously delivering software through the application of extreme programming practices and software craftsmanship values. In 2010, our founders started the London Software Craftsmanship Community (LSCC), now the largest and most active software craftsmanship community in the world, with more than 5,500 developers. Codurance was founded in 2013 and has carried that same community spirit ever since. Budget: £550 - £600 / per day InsideIR35 6 Months contract Requirements We're looking for a Contract Agile Delivery Manager who shares our values of pragmatism, professionalism and transparency. Working from your affiliated office location (London,...

The Foreign, Commonwealth & Development Office (FCDO) pursues our national interests and projects the UK as a force for good in the world. We promote the interests of British citizens, safeguard the UK 's security, defend our values, reduce poverty, and tackle global challenges with our international partners.   About the role: Consular Services Department is seeking an experienced Commercial IT Delivery Manager to support the mobilisation of new digital contracts, manage transition and exit deliverables, and ensure governance and reporting align with HMG commercial, procurement and business case expectations.   The role will help establish clear ways of working between suppliers, Commercial, Finance, IDD and Consular delivery teams, ensuring responsibilities, milestones, risks and decisions are visible from contract set-up through to live service.   The postholder will report to the Head of Strategy and Portfolio.   The main...

The Ministry of Defence (MOD) is a central government department with a mission to protect our country and provide the ultimate guarantee of its security and independence, as well as helping to protect its values and interests abroad.   The MOD is one of the biggest public procurement organisations in Europe and the single largest customer for UK industry. It currently manages approximately £20 billion of spend on capital investments in equipment and infrastructure every year. Over the next decade the MOD is committed to spending over £190 billion on equipment and support. The MOD's customers include both the armed forces and national security agencies, and it has a diverse range of requirements, including military fighting vehicles, education services, nuclear submarines and facilities management.   The MOD's aim is to provide its armed forces with the best capabilities to enable them to protect the UK's security and advance national interests,...

Must have skills: Demonstrable experience with Solidity. Strong understanding of blockchain security practices and potential vulnerabilities. Proficiency in Hardhat and Foundry. Experience with Solidity security testing tools like Slither, Mythril, Echidna Practical experience with scripting languages like Javascript or Typescript. Ability to craft unit, integration, fork, and invariant tests, ensuring code longevity. Demonstrable aptitude for best development practices, data structures, algorithms, and methodologies. Bachelor's degree in Computer Science, Engineering, or a related STEM discipline. Excellent debugging and troubleshooting skills. Strong written and verbal communication skills. Self-motivated with the ability to work in a fast-paced, evolving environment. Proficient communication skills in English. Development background in sectors such as banking, finance, or trading, paired with a comprehensive grasp of financial...

Role description Role: Generative AI Scientist Permanent / Fixed term contract/ Contract Inside IR35 Contract Length: Initial 6-12 months with possible extensions Start Date: Immediate preferred Location Requirement:Onsite (3 days per week in the office and 2 days remote ) Applicants legally authorized to work in the United Kingdom without the need for current or future visa sponsorship preferred Experience: Minimum10-15 years We are seeking a Generative AI Scientist to design and deliver agent‑based, AI‑enabled solutions integrated into complex enterprise environments. This is a hands‑on engineering role, focused on building production‑grade AI systems that move beyond experimentation into scalable, secure, and measurable outcomes for our clients. You’ll work closely with UST’s engineering teams, AI specialists, and business stakeholders to translate high‑value use cases into robust solutions. What You’ll Be Doing:...

In this role you will participate in the development of software capability within the NCA National Cyber Crime Unit (NCCU) by building upon existing capabilities and creating innovative applications.   As a member of a technical team you will be working with a range of programming paradigms, data structures and modern programming languages to support, identify and develop software and technical opportunities and smarter working.   As a Software Tester your main responsibilities will be to:   Accelerate the process of taking new ideas and features through to the live environment with test automation. Improve the overall test practices across the system through technical implementation and mentoring developers on testing, increasing reliability and stability. Testing the code written by software developers. Testing how individual cloud components are integrating with each other, and how to assess that programmatically....

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...

NS&I is one of the largest savings organisations in the UK with more than 24 million customers and over £218 billion invested. We are both a government department and an Executive Agency of the Chancellor of the Exchequer. Our origins can be traced back more than 150 years to 1861.   A small company with a big reach. We care for colleagues, respect one another, invest in our people and manage talent effectively.   This role is subject to Baseline Personnel Security Standard and financial credit checks.   As a Service Development Owner / Product Owner (Customer Experience) your main responsibilities will be: Represent the voice of the customer across assigned services and customer journeys. Develop a strong understanding of customer needs, behaviours and pain points using research, analytics and feedback. Identify, shape and prioritise service improvement opportunities that deliver measurable customer and business value....

Job Title : PMO Analyst Job Location : London SJS or Sunbury (Hybrid 3 days onsite) Contract Length : 6 Months Industry: Oil and Energy Working Hours: 37.5 hrs/week   Job Summary The Castrol separation programme operates through a dedicated Separation Management Office (PMO) supporting multiple workstreams across a complex global transformation. The Castrol Separation PMO Analyst will provide administrative, reporting and coordination support to the programme team, ensuring accurate programme information, high-quality leadership materials and effective governance processes. The role will be responsible for developing presentations, maintaining reporting artefacts, coordinating inputs from workstreams and supporting the smooth operation of PMO activities. The successful candidate will play a key role in producing executive-ready materials and enabling effective communication across the programme. Job Responsibilities: Support the...

An active SC Clearance is an essential requirement for this role, as a minimum you must  be willing & eligible to undergo checks. (Please note, due to the exceptional requirements of this position (short-term nature of this role and speed at which we require a postholder in situ) preference may be given to candidates who meet all of the essential criteria and hold active security clearance.)      Key Role Responsibilities    Provide and gain approval of all key Service Management and Integration products required to define the outcome based scope for the Strategic Gateways procurement Support the development of all ITT related (including requirement definition, transition and finance aspects of the ITT etc) Provide supporting documentation including creating any collateral required to provide bidders with an understanding of the current operating environment which Strategic gateways will integrate including any...

Role description Role: Generative AI Scientist Permanent / Fixed term contract/ Contract Inside IR35 Contract Length: Initial 6-12 months with possible extensions Start Date: Immediate preferred Location Requirement:Onsite (3 days per week in the office and 2 days remote ) Applicants legally authorized to work in the United Kingdom without the need for current or future visa sponsorship preferred Experience: Minimum10-15 years We are seeking a Generative AI Scientist to design and deliver agent‑based, AI‑enabled solutions integrated into complex enterprise environments. This is a hands‑on engineering role, focused on building production‑grade AI systems that move beyond experimentation into scalable, secure, and measurable outcomes for our clients. You’ll work closely with UST’s engineering teams, AI specialists, and business stakeholders to translate high‑value use cases into robust solutions. What You’ll Be...

The Department for Education is seeking an experienced and delivery-focused Data Delivery Manager to support the Longitudinal Education Outcomes (LEO) and Pupil Parent Matched Dataset (PPMD) Programme within the Enterprise Data for Access and Sharing (EDAS) portfolio. This is a high-profile opportunity to lead the delivery of complex, cross-government data initiatives that underpin policy development, funding decisions, and research across government and academia. Working within a multidisciplinary environment, you will play a pivotal role in establishing effective delivery structures, driving collaboration across technical and business teams, and ensuring the successful delivery of critical data transformation programmes. The role offers the opportunity to work with nationally significant education datasets and contribute to improving how data is accessed, governed, and used to inform key decisions across the UK public sector.   As a  Data Delivery Manager ,...

Must have skills: Demonstrable experience with Solidity. Strong understanding of blockchain security practices and potential vulnerabilities. Proficiency in Hardhat and Foundry. Experience with Solidity security testing tools like Slither, Mythril, Echidna Practical experience with scripting languages like Javascript or Typescript. Ability to craft unit, integration, fork, and invariant tests, ensuring code longevity. Demonstrable aptitude for best development practices, data structures, algorithms, and methodologies. Bachelor's degree in Computer Science, Engineering, or a related STEM discipline. Excellent debugging and troubleshooting skills. Strong written and verbal communication skills. Self-motivated with the ability to work in a fast-paced, evolving environment. Proficient communication skills in English. Development background in sectors such as banking, finance, or trading, paired with a comprehensive grasp of financial...

Job Description We’re Hiring: Mobile Security Engineer Experience: 8+ Years Location: Bristol / London, UK (Hybrid – Onshore) Employment Type: Contract (Inside IR35) Company: Derisk360 Preferred: Immediate Joiners (0–15 Days Notice Period) Are you passionate about securing mobile applications and protecting enterprise platforms from emerging threats? Join Derisk360 as a Mobile Security Engineer and help strengthen the security posture of mobile applications through security assessments, threat modelling, and secure engineering practices. What You'll Do: Conduct regular reviews of mobile application security posture using hands-on security assessment techniques. Perform threat modelling and recommend appropriate mitigation strategies for mobile platforms. Develop and maintain penetration testing tools, scripts, security policies, and procedures. Assess and improve the security of Android and iOS applications....

Full job description 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,...

Why Sony Interactive Entertainment? Sony Interactive Entertainment isn't just the Best Place to Play — it's also the Best Place to Work. Sony Interactive Entertainment (SIE) is the company behind the PlayStation brand. As a subsidiary of Sony Group Corporation, we're part of a proud legacy of innovation and excellence. SIE is a dynamic technology company, delivering cutting-edge hardware and network services to more than 100 million people and an entertainment leader, home to some of the most beloved and recognizable intellectual properties (IP) in the world. Our role at SIE is to create and nurture the experiences under the PlayStation brand, a name synonymous with entertainment excellence and creativity. Location: London / Hybrid Duration: 6-12 Months Day Rate: £340 - £360 per day Engagement Method : Umbrella/PAYE Role Overview: We're looking for a Senior Digital Designer to join our Creative Services team for an initial 6-12 month...

Job description   About MARI Group MARI is a global events and experiences company powering world-defining live experiences. Our portfolio of premium live properties spans sports, art, and entertainment — including the Madrid and Miami Open tennis tournaments, Frieze (a leading voice in contemporary art), and Barrett-Jackson (the premium U.S. collector car auction company). MARI also includes TodayTix Group, the global e-commerce leader for cultural experiences, connecting millions of customers with the best in live entertainment.  MARI is reshaping the live events landscape — building a growing portfolio of category-defining events and brands that set the standard for what's next, across sports, entertainment, art, and lifestyle.  At MARI, you'll work alongside people who are passionate, curious, and driven — people who believe that live experiences have the power to shape culture, and who care about the work, the mission, and each other. We...

Joining a cross functional Delivery team (software engineers, delivery, QA, UX, design) Client is in financial services domain ILarge platform and product build inc. customer journeys. Ideal start date 23rd July 2026 6 months contract - likely to extend £day rate / outside IR35 2 days / week in person working Immediate interviews.     Red Badger Founded in 2010 by Stuart, Cain and David, we help large organisations improve their speed to market whilst focusing on delivering value to their users and customers. We work with our clients to understand their problems and validate ideas in order to deliver improved process efficiencies, strategic enhancements and new digital products and services (or make significant improvements to existing ones). The best bit about Red Badger is, of course, the team. We've been around for 10+ years now and we are 100 strong. We are really proud of our people; we support and learn a lot from...

Senior Consultant (Commerce) - Contract Senior Consultant with experience in Commerce ecosystems and technologies wanted to join our Business Services team on a Fixed Term or Contract basis The opportunity: We are on the hunt for a visionary and accomplished Senior Business Consultant to play a pivotal role in shaping the future of our Consultancy solutions. This is not merely a high profile role; it's an opportunity to act as a trusted leader and mentor, guiding both our clients and our internal team towards unprecedented success. Your deep industry expertise and collaborative leadership style will be instrumental in driving impactful business outcomes, while your commitment to our people-first approach will be essential in fostering a culture of empowerment, growth, and continuous improvement within the Consultancy team and across the entire Business Services department. Contract/FTC roles open London - Hybrid Other core elements of this role will be:...