15 senior ui designer london jobs found

UX/UI Designer – Contract (Outside IR35) Rate: £600 per day Contract Length: 6 months IR35 Status: Outside IR35 Location: Bank, City of London Working Pattern: Hybrid – onsite up to once per week (max) Start: ASAP The Role We are seeking an experienced UX/UI Designer to join an organisation on a 6-month contract. This role will suit a senior designer who is comfortable working across both UX and UI, contributing to end-to-end design delivery while influencing design strategy and mentoring others. You will work closely with product managers, engineers, and business stakeholders to design high-quality, user-centred digital experiences across web and mobile platforms. Key Responsibilities Lead UX/UI design across web and mobile applications Create wireframes, prototypes, and interaction designs Contribute to and evolve component-based design systems Conduct user research, usability testing, and apply data-driven insights Ensure...

Rate: £350 Day IR35 Status: Outside IR35 Contract Length : Initial 3-month contract (with extension potential) Location: Fully Remote (UK-based only) Salary : £350 a day Location: London, Greater London, United Kingdom We are seeking an experienced and highly skilled Senior UX/UI Designer to contribute to key product initiatives within a fast-moving fintech startup. This project-based contract role is ideal for entrepreneurial individuals who value autonomy, strategic input, and the opportunity to work in an outcome-driven environment. As a Senior Designer, you will be responsible for creating intuitive and impactful user experiences across a complex fintech platform. You will lead the design of end-to-end user journeys, interaction flows, and high-fidelity prototypes using Figma. Your work will directly influence how users interact with in-app experiences, including navigation, onboarding flows, and guided tours. A strong understanding of information...

Job title: Senior Full Stack Engineer Contract (React + Python) Type: Full-time, Contract, Outside IR35 Location: EU-based, with flexible home, office, or hybrid working Office locations: Newcastle, Leeds, Sofia Hub locations: Edinburgh, Manchester, London Join a small, senior team shaping the next generation of classroom technology. This EdTech product is already in production, used by real teachers, and growing fast. You’ll work directly with the CTO and experienced engineers to ship features that genuinely make a difference in education. You’ll see your work move from prototype to production in days, not months — and you’ll have a direct say in how the platform evolves What you'll do Lead your own work stream across React (front end) and Python (back end and APIs). Turn broad problems into clear plans and deliver working features. Suggest improved approaches and solutions that add value. Collaborate with product, delivery and...

Full job description Job title:  Senior Full Stack Engineer Contract (React + Python) Type:  Full-time, Contract, Outside IR35 Location:  EU-based, with flexible home, office, or hybrid working Office locations:  Newcastle, Leeds, Sofia Hub locations:  Edinburgh, Manchester, London Join a small, senior team shaping the next generation of classroom technology. This EdTech product is already in production, used by real teachers, and growing fast. You’ll work directly with the CTO and experienced engineers to ship features that genuinely make a difference in education. You’ll see your work move from prototype to production in days, not months — and you’ll have a direct say in how the platform evolves What you'll do Lead your own work stream across React (front end) and Python (back end and APIs). Turn broad problems into clear plans and deliver working features. Suggest improved...

Contract Location: London (Hybrid - 1 day per month onsite) Day Rate: Up to £600 per day, Outside IR35 Duration: 6 months with view to extend Industry: Consultancy SC Eligibility Required About the Client Our client is a specialist cloud and software engineering consultancy that helps organisations modernise how they build, deploy and operate software. Working across both public and private sectors, they partner closely with engineering teams to reduce technical debt, improve developer experience, and deliver resilient, scalable systems using modern engineering practices. With a strong focus on cloud platforms, modern application delivery and long-term system evolution, this is an organisation known for its high engineering standards, collaborative culture, and meaningful work on complex, business-critical systems. How you'll spend your day As a Senior Java / React Full Stack Developer contractor ,...

Senior Java/React Full Stack Developer Location: London or Newcastle, UK (Hybrid - ~1 day per week in office / onsite) Contract: Contract - 6 months with view to extend Day Rate: £550 - £600 per day - Outside IR35 About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy. We help organisations modernise software systems, improve developer productivity, and adopt cloud-native practices that enable long-term, sustainable delivery. Our software engineering work focuses on modern application development, domain-driven design, and improving delivery outcomes through better architecture, testing, and developer experience. About the Role We are looking for a Senior Java/React Full Stack Developer to join Appvia on a contract basis, working as a hands-on engineering consultant within our Solutions Engineering team. This role is focused on modernising large, complex software systems, reducing technical debt, and improving...

Software Engineer – Full Stack (Python & TypeScript) A fast-scaling FinTech is expanding its engineering team and is hiring a Software Engineer with strong full stack capability across Python and TypeScript . Their platform supports businesses across the UK and continues to grow at pace, with billions already delivered through their systems. This role sits at the centre of their product and platform development, giving you the opportunity to work across the entire stack, influence how systems evolve, and help shape the next chapter of their technology landscape. What You’ll Work On As a full stack engineer, you’ll be involved in every layer of the product — backend services, frontend applications, and everything in between. You’ll: Build and refine production systems across backend (Python) and frontend (TypeScript/React) Design APIs, data flows, and user-facing features that work together seamlessly Work end-to-end: plan, build, ship, and support...

Senior Software Developer in Test | SDET | React | Java | Outside IR35 Modern Test Strategy | Quality Engineering | Public Sector/Consultancy Delivery SR2 is supporting a consultancy partner delivering modern software engineering services across complex Java and React-based systems. This role sits within delivery teams as a hands-on, consultative Senior Software Developer in Test, focused on improving how quality is engineered into software. You'll work closely with developers and platform engineers to modernise testing approaches, reduce brittle end-to-end testing, and introduce smarter, more effective automation strategies, including AI-assisted testing techniques. You'll report into a Principal Software Engineer and act as a testing authority within delivery teams, shaping test strategy rather than just writing tests. The Role You'll take ownership of test architecture and automated testing strategy across Java and React applications, helping teams move away from slow,...

Senior Full Stack Engineer | Java | React | Outside IR35 Java | React | Modernisation | DDD | Microservices | AI-Assisted Engineering SR2 is supporting a consultancy-led delivery engagement focused on modernising large, complex software estates. This role suits a senior, hands-on Full Stack Developer who enjoys working closely to clients, reducing technical debt, and improving engineering practices across delivery teams. You'll operate as a consulting engineer within a multi-disciplinary environment, helping teams move faster and more safely through modern development approaches, tooling, and AI-assisted engineering techniques. The Role This is a hands-on senior engineering role, focused on modernising Java/React applications, improving developer productivity, and guiding teams toward better architectural and delivery outcomes. You'll work closely with platform, test, and client engineering teams, while reporting into a Principal Engineer and influencing technical...

Senior Java/React Full Stack Developer Location: London or Newcastle, UK (Hybrid - ~1 day per week in office / onsite) Contract: Contract - 6 months with view to extend Day Rate: £550–£600 per day - Outside IR35 About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy. We work with organisations to improve software quality, reliability, and delivery outcomes through modern engineering and testing practices. Our teams focus on reducing risk in complex systems by improving automated testing, architectural clarity, and developer feedback loops. About the Role We are seeking a consultative Senior Software Developer in Test with hands-on experience in React and Java to join Appvia as a hands-on testing and quality engineering consultant. This role is centred on modernising automated test strategies for Java/React-based applications, moving away from brittle, heavyweight end-to-end testing towards more effective integration,...

Senior Java/React Full Stack Developer Location: London or Newcastle, UK (Hybrid - ~1 day per week in office / onsite) Contract: Contract - 6 months with view to extend Day Rate: £550–£600 per day - Outside IR35 About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy. We help organisations modernise software systems, improve developer productivity, and adopt cloud-native practices that enable long-term, sustainable delivery. Our software engineering work focuses on modern application development, domain-driven design, and improving delivery outcomes through better architecture, testing, and developer experience. About the Role We are looking for a Senior Java/React Full Stack Developer to join Appvia on a contract basis, working as a hands-on engineering consultant within our Solutions Engineering team. This role is focused on modernising large, complex software systems, reducing technical debt, and improving delivery speed...

Senior Java/React Full Stack Developer Location: London or Newcastle, UK (Hybrid - ~1 day per week in office / onsite) Contract: Contract - 6 months with view to extend Day Rate: £550–£600 per day - Outside IR35 About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy. We work with organisations to improve software quality, reliability, and delivery outcomes through modern engineering and testing practices. Our teams focus on reducing risk in complex systems by improving automated testing, architectural clarity, and developer feedback loops. About the Role We are seeking a consultative Senior Software Developer in Test with hands-on experience in React and Java to join Appvia as a hands-on testing and quality engineering consultant. This role is centred on modernising automated test strategies for Java/React-based applications, moving away from brittle, heavyweight end-to-end testing towards more effective integration,...

Senior Java/React Full Stack Developer Location: London or Newcastle, UK (Hybrid - ~1 day per week in office / onsite) Contract: Contract - 6 months with view to extend Day Rate: £550–£600 per day - Outside IR35 About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy. We work with organisations to improve software quality, reliability, and delivery outcomes through modern engineering and testing practices. Our teams focus on reducing risk in complex systems by improving automated testing, architectural clarity, and developer feedback loops. About the Role We are seeking a consultative Senior Software Developer in Test with hands-on experience in React and Java to join Appvia as a hands-on testing and quality engineering consultant. This role is centred on modernising automated test strategies for Java/React-based applications, moving away from brittle, heavyweight end-to-end testing towards more effective integration,...

Senior Java/React Full Stack Developer Location: London or Newcastle, UK (Hybrid - ~1 day per week in office / onsite) Contract: Contract - 6 months with view to extend Day Rate: £550–£600 per day - Outside IR35 About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy. We help organisations modernise software systems, improve developer productivity, and adopt cloud-native practices that enable long-term, sustainable delivery. Our software engineering work focuses on modern application development, domain-driven design, and improving delivery outcomes through better architecture, testing, and developer experience. About the Role We are looking for a Senior Java/React Full Stack Developer to join Appvia on a contract basis, working as a hands-on engineering consultant within our Solutions Engineering team. This role is focused on modernising large, complex software systems, reducing technical debt, and improving delivery speed...

Senior Java/React Full Stack Developer Location: London or Newcastle, UK (Hybrid - ~1 day per week in office / onsite) Contract: Contract - 6 months with view to extend Day Rate: £550–£600 per day - Outside IR35 About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy. We help organisations modernise software systems, improve developer productivity, and adopt cloud-native practices that enable long-term, sustainable delivery. Our software engineering work focuses on modern application development, domain-driven design, and improving delivery outcomes through better architecture, testing, and developer experience. About the Role We are looking for a Senior Java/React Full Stack Developer to join Appvia on a contract basis, working as a hands-on engineering consultant within our Solutions Engineering team. This role is focused on modernising large, complex software systems, reducing technical debt, and improving delivery speed...