16 senior service designer jobs found in London

PowerApps Developer (Contract) - SC Cleared/NPPV3 London (Hybrid - 3 days per week onsite) Initial 3 months - Strong Extension Potential Up to £520 per day (Outside IR35) We are currently seeking a highly capable PowerApps Developer to join a high-profile programme delivering secure, scalable digital solutions within a regulated public sector environment. This role sits within a fast-paced delivery team focused on modernising core services through the Microsoft Power Platform. This is an excellent opportunity for a contractor who thrives in secure environments and has experience building robust applications that meet stringent compliance and security standards. Key Requirements Strong hands-on experience with the Microsoft Power Platform, including: PowerApps (Canvas and Model-driven apps) Power Automate (workflow automation) Dataverse and data modelling Proven experience delivering enterprise-grade Power Platform solutions end-to-end Ability to integrate Power...

UI Architect Global Financial Services / Payments Client Location: London - 2 days per week Rate: £550–£570 per day Contract: 6 months initial IR35 Status: Outside IR35 Role Overview We are supporting a global financial services organisation operating in cross-border payments and emerging markets as they continue a large-scale technology transformation. They are looking for an experienced UI Architect to lead the design and delivery of scalable, modern front-end platforms aligned to a microservices architecture. This is a hands-on architecture role with responsibility for defining standards, driving best practice and shaping the frontend ecosystem across multiple products. Key Responsibilities Define and own frontend architecture across a microservices-based platform Design scalable UI solutions aligned to API-first backend services Establish reusable components, UI standards and enterprise design systems Define integration approaches...

Solution Architect - B2B Payments Transformation Contract: 6 months Rate: £550-£575 per day (Outside IR35) Location: London, Hybrid An experienced Solution Architect is required to lead end-to-end architecture for a large-scale B2B banking RTL and Payments Transformation programme within a complex financial services environment. This role will own solution design across multiple workstreams, ensuring a cohesive, scalable and resilient architecture aligned to regulatory, operational and commercial requirements. The programme spans core B2B banking capabilities , including payments, reconciliation, KYC, cash management, monitoring and billing. You will play a central role in shaping an event-driven architecture , working closely with senior stakeholders, peer architects and offshore delivery teams, while providing strong architecture governance and design assurance. Key Responsibilities Own solution architecture and high-level design across multiple workstreams...

Solution Architect - B2B Payments Transformation Contract: 6 months Rate: £550- £575 per day (Outside IR35) Location: London, Hybrid An experienced Solution Architect is required to lead end-to-end architecture for a large-scale B2B banking RTL and Payments Transformation programme within a complex financial services environment. This role will own solution design across multiple workstreams, ensuring a cohesive, scalable and resilient architecture aligned to regulatory, operational and commercial requirements. The programme spans core B2B banking capabilities , including payments, reconciliation, KYC, cash management, monitoring and billing. You will play a central role in shaping an event-driven architecture , working closely with senior stakeholders, peer architects and offshore delivery teams, while providing strong architecture governance and design assurance. Key Responsibilities Own solution architecture and high-level...

Contract Business Analyst - KPI Reporting / Dashboard Development We are seeking an experienced Contract Business Analyst to support a KPI reporting and dashboard development project on an initial six-month assignment. The successful contractor will work closely with senior stakeholders to identify, define and gather the KPI metrics required for corporate reporting dashboards. This will include understanding business performance requirements, assessing available data points, shaping dashboard content, and ensuring information is presented clearly and effectively for senior audiences. This role would suit a confident, delivery-focused Business Analyst with strong stakeholder engagement skills, recent social housing experience, and a solid understanding of KPI reporting, data requirements and dashboard design. Contract: 6 months Rate c £500 per day Outside IR35, subject to CEST determination Location: Remote-first hybrid, with occasional face-to-face collaboration as...

UI Architect Global Financial Services/Payments Client Location: London - 2 days per week Rate: £550-£570 per day Contract: 6 months initial IR35 Status: Outside IR35 Role Overview We are supporting a global financial services organisation operating in cross-border payments and emerging markets as they continue a large-scale technology transformation. They are looking for an experienced UI Architect to lead the design and delivery of scalable, modern Front End platforms aligned to a microservices architecture. This is a hands-on architecture role with responsibility for defining standards, driving best practice and shaping the Front End ecosystem across multiple products. Key Responsibilities Define and own Front End architecture across a microservices-based platform Design scalable UI solutions aligned to API-first Back End services Establish reusable components, UI standards and enterprise design systems Define integration approaches with RESTful and...

Contract Business Analyst - KPI Reporting/Dashboard Development We are seeking an experienced Contract Business Analyst to support a KPI reporting and dashboard development project on an initial six-month assignment. The successful contractor will work closely with senior stakeholders to identify, define and gather the KPI metrics required for corporate reporting dashboards. This will include understanding business performance requirements, assessing available data points, shaping dashboard content, and ensuring information is presented clearly and effectively for senior audiences. This role would suit a confident, delivery-focused Business Analyst with strong stakeholder engagement skills, recent social housing experience, and a solid understanding of KPI reporting, data requirements and dashboard design. Contract: 6 months Rate c £500 per day Outside IR35, subject to CEST determination Location: Remote-first hybrid, with occasional face-to-face collaboration as required Start...

Solution Architect - B2B Payments Transformation Contract: 6 months Rate: £600-£650 per day (Outside IR35) Location: London, Hybrid An experienced Solution Architect is required to lead end-to-end architecture for a large-scale B2B banking RTL and Payments Transformation programme within a complex financial services environment. This role will own solution design across multiple workstreams, ensuring a cohesive, scalable and resilient architecture aligned to regulatory, operational and commercial requirements. The programme spans core B2B banking capabilities , including payments, reconciliation, KYC, cash management, monitoring and billing. You will play a central role in shaping an event-driven architecture , working closely with senior stakeholders, peer architects and offshore delivery teams, while providing strong architecture governance and design assurance. Key Responsibilities Own solution architecture and high-level design across multiple workstreams...

UI Architect Global Financial Services / Payments Client Location: London - 2 days per week Rate: £550- £570 per day Contract: 6 months initial IR35 Status: Outside IR35 Role Overview We are supporting a global financial services organisation operating in cross-border payments and emerging markets as they continue a large-scale technology transformation. They are looking for an experienced UI Architect to lead the design and delivery of scalable, modern front-end platforms aligned to a microservices architecture. This is a hands-on architecture role with responsibility for defining standards, driving best practice and shaping the frontend ecosystem across multiple products. Key Responsibilities Define and own frontend architecture across a microservices-based platform Design scalable UI solutions aligned to API-first backend services Establish reusable components, UI standards and enterprise design systems Define...

Solution Architect - B2B Payments Transformation Contract: 6 months Rate: £600- £650 per day (Outside IR35) Location: London, Hybrid An experienced Solution Architect is required to lead end-to-end architecture for a large-scale B2B banking RTL and Payments Transformation programme within a complex financial services environment. This role will own solution design across multiple workstreams, ensuring a cohesive, scalable and resilient architecture aligned to regulatory, operational and commercial requirements. The programme spans core B2B banking capabilities , including payments, reconciliation, KYC, cash management, monitoring and billing. You will play a central role in shaping an event-driven architecture , working closely with senior stakeholders, peer architects and offshore delivery teams, while providing strong architecture governance and design assurance. Key Responsibilities Own solution architecture and high-level...

Senior Software Engineer - AI-Assisted Legacy Medernisation Outside IR35 - Contract (Insurance Client) About the role Softwire is helping our client modernise a business-critical legacy platform, moving it off Oracle Forms and onto a modern React and .NET stack, with the underlying Oracle database migrating to Azure SQL. We're looking for a strong full-stack contract developer to join the existing team and drive this migration forward. What sets this role apart is that the use of AI tools is the main focus, not a nice-to-have. You'll use tools such as Claude to accelerate the translation of Oracle Forms logic into the new stack and to support the database migration. We want someone who already works this way day to day and can show how AI changes the pace and quality of their delivery. Key Responsibilities Work alongside our team to migrate the legacy product onto a React / .NET architecture, keeping pace with the team's Jira workflow. Use AI tools...

Senior AI Voice Engineer £500 - £550 per day Outside IR35 Remote (occasional London meet-up) Initial 6 Month Contract We are looking for a Senior AI Voice Engineer to help build and scale a production-grade AI voice platform for a major UK financial services organisation. This is not a proof-of-concept role. The business has already built initial Python-based prototypes and is now looking for an experienced contractor to take the solution into production, helping define the architecture, challenge technical decisions, and build a scalable platform capable of handling real customer interactions. You'll work directly with senior stakeholders and have significant influence over both the technical direction and implementation approach. What You'll Be Doing Designing and building production-grade AI voice agent solutions Developing scalable Python services and APIs Working with speech-to-text (STT), large language models (LLMs) and text-to-speech (TTS)...

Android Developer/Mobile Developer with Kotlin/Jetpack Compose. 90% REMOTE. £450-£500/DAY OUTSIDE IR35 PAY. 3 MONTH CONTRACT INITIALLY. Our Government client seeks a dynamic and technically astute Android Developer with 7 years minimum Mobile (Android Development) experience. THE IDEAL CANDIDATE WILL HAVE THE ABILITY TO BECOME SC CLEARED DUE TO GOVERNMENT SENSITIVE DATA. We are expanding our Mobile Development team and looking for talented Android Developer who are passionate about building high-quality mobile applications. If you enjoy solving complex problems, working with modern technologies, and contributing to a collaborative engineering culture, this is an opportunity to make a real impact. About the Role As a Mobile Developer, you will play a key role in designing, building, and maintaining advanced Android applications used by thousands of users. You'll work closely with product managers, designers, Back End engineers, and QA to deliver features that are...

AI Voice Engineer (Contract) Fully Remote £300- £560 Per Day Outside IR35 Immediate Start 3 Months Initially The Company They are a well-established organisation operating within a regulated environment, focused on delivering better outcomes for their customers through technology. As part of a wider AI transformation programme, they have already seen strong success with voice AI solutions internationally and are now expanding these capabilities into the UK. The business is investing heavily in AI, with clear backing from senior leadership and a strong appetite for innovation. You will join a collaborative data and AI function with a focus on practical, scalable solutions. The Role and Deliverables Design, build and optimise AI-powered voice agents for real-world customer interactions Develop and integrate voice pipelines using leading speech and conversational AI technologies Build robust Python-based services to support...

Senior Software Engineer - Outside IR35 - Contract (Insurance) About the role Essential: Self-starter, someone who can pick up context quickly, drive outcomes efficiently, and to a high quality Competent in doing high-level designs, solution management, and scoping Understanding of data modelling best practices Ability to translate technical solutions to non-technical stakeholders and bring them on the journey Experience working in an agile delivery environment Experience working with React, TypeScript, Azure, Microsoft SQL, and Databricks (if they don’t have all of these, that’s workable, but be good to understand any they don’t have experience with) Frontend: React + TypeScript + Vite Material UI with Emotion for styling TanStack React Query 5 for server state React Router 7 React Hook Form+Yup for forms/validation MSAL for Entra ID auth Jest+Testing Library for unit tests; Playwrightfor E2E and visual tests Hosted as an Azure Static...

Delivery Lead & Product Owner (Hybrid Role) - Outside IR35 - Contract About the role We’re are looking for a hybrid Delivery Lead / Product Owner to work on a new engagement with one of our FS&I clients. You’ll be working as part of a wider Softwire team to prove a new architecture for a data warehouse and that it can meet the needs of various Finance stakeholders. The initial phase of this work is a short 8-week Proof of Value phase, proving the technical architecture and bringing together wider Finance initiatives into a roadmap for future delivery under this architecture. Your role will include both Delivery Leadership (responsible for the successful day to day delivery of the team) and Product Ownership for a technical data product (turning client priorities into well-defined roadmaps and recommendations) working alongside a Technical Lead and Principal. Your responsibilities will include: supporting the day to day running and execution of...