18 senior product designer jobs found in London

Principal Product Designer (Interaction Design UX & Design Systems) £550 - £650 per day (Outside IR35) London (Hybrid) x2 days onsite 6 month contract Overview We are looking for an exceptional Principal Product Designer to join an exciting organisation building a large-scale digital platform from the ground up. This is a rare opportunity to define the visual and interaction design language of a greenfield product ecosystem. Working closely with senior product, engineering, and leadership teams, you will shape how users experience the platform, establish design standards, and create the foundations of a scalable design system. The ideal candidate combines outstanding visual craft with strong interaction design expertise and thrives in environments where they can influence both product direction and design culture. Role & Responsibilities Own and evolve the visual and interaction design language across a suite of digital products...

Location: London, 4 days a week on site Outside IR35 contract - 700-750 a day We are looking for an SC, preferably DV cleared self-motivated and experienced Security Architect to lead in bringing enhanced and new services into what is key government asset. Working within a specialist services company you will drive and/or create the necessary artefacts to help the client organisation deliver rapid change. You will have excellent interpersonal skills and a pragmatic approach to getting change through delivered successfully through the internal Security Governance group. Key Responsibilities: The ideal candidate will have come from a strong technical background, and have an understanding of attack vectors for high threat environments, across both proprietary and open-source technology stacks. You will advise and enable technical teams to make security decisions and provide advice and guidance, ensuring the effective use of common tools and patterns. You will have a proactive...

Location: London, 4 days a week on site Outside IR35 contract - 700-750 a day We are looking for an SC, preferably DV cleared self-motivated and experienced Security Architect to lead in bringing enhanced and new services into what is key government asset. Working within a specialist services company you will drive and/or create the necessary artefacts to help the client organisation deliver rapid change. You will have excellent interpersonal skills and a pragmatic approach to getting change through delivered successfully through the internal Security Governance group. Key Responsibilities: The ideal candidate will have come from a strong technical background, and have an understanding of attack vectors for high threat environments, across both proprietary and open-source technology stacks. You will advise and enable technical teams to make security decisions and provide advice and guidance, ensuring the effective use of common tools and patterns. You will have a...

Interim Finance Transformation Lead (D365 Consolidation and Reporting) | International Consumer Brand | London Harmonic are delighted to be partnering exclusively with an established, internationally expanding consumer brand on the search for an Interim Finance Transformation Lead to support a critical D365 implementation programme. This is a fantastic opportunity to join a high-growth business at a pivotal moment in its finance transformation journey. The organisation has built a strong presence across international markets and is now investing significantly in its D365 rollout and wider reporting infrastructure to support the next phase of its growth. This role will suit a qualified finance professional who has been the finance voice in the room on a D365 consolidation and reporting build. This is not a programme management or PMO role. The business needs a hands-on finance subject matter expert with deep consolidation knowledge and the ability to flex and deliver...

Lead Platform Engineer Python | Cloud | Terraform | IAM | DevOps | Infrastructure-as-Code (IaC) Rate: Circa £700–£800 per day (Outside IR35) Contract Length: 6 Months Location: London / Hybrid (2 days per week) Overview We are seeking an experienced Principal / Lead Engineer to join a highly ambitious organisation building a large-scale, mission-critical data and technology platform. This is a unique opportunity to join at the earliest stages of a major programme and play a key role in shaping its technical foundation. Working closely with the CTO and a small team of senior engineers, you will lead the design and implementation of core infrastructure, establish engineering standards and practices, and make architectural decisions that will have long-term strategic impact. If you enjoy solving complex technical challenges, influencing technology strategy, and creating robust engineering foundations, this role offers an exceptional opportunity to make a...

AI Engineer - LLM & Agentic Systems London - Hybrid. Circa £500 – £675 per day (and negotiable DOE) Contract (Outside IR35) Mid-level, Senior & Lead. Agentic AI / Machine Learning. Company: Our client is a globally established B2B information and professional services business, operating across multiple high-value industry sectors. They have established data science and machine learning engineering teams already delivering in production, and are now expanding their AI capability significantly across the global organisation. This is a role for people who ship. If you've built LLM-powered systems and agentic workflows that are live in production - not demos, not prototypes - and you want to do that at genuine scale, this is worth applying for. What you'll be working on as an AI Engineer - LLM & Agentic Systems: Designing and building AI agents and agentic workflows - combining LLMs, RAG, reasoning, memory and tool orchestration to...

Senior Product Manager / Product Owner – Data and Technology Contract: 6 months Rate: £600-700 PD (Outside IR35) Location: London / Hybrid x2 days onsite Overview We are seeking an experienced Product Manager / Product Owner to join a major health data programme. You will define and deliver products that enable secure, trusted and efficient access to health data at scale. You will work closely with stakeholders, users and technical teams to drive product strategy, prioritisation and delivery, ensuring solutions create measurable value and improve user outcomes. This role is ideal for a product professional who enjoys operating in complex environments, managing diverse stakeholder groups and translating policy, governance and operational requirements into successful digital products. Role & Responsibilities Product Strategy & Delivery Define and communicate product vision, strategy and roadmap aligned to organisational goals and user needs...

Senior Flutter Developer - Outside IR35 - Contract A rare opportunity to join our fast-growing technology company selling high-value software development services. An ideal role for an experienced and dynamic developer who wants to be involved with an exciting and challenging project. Must have Several years of experience developing customer-facing mobile apps for both iOS and Android, using Flutter. Experience working as part of a team (including tools to support collaboration, such as git and user story management software) Experience working closely with other job roles, such as designers and product owners Nice to have Experience with mobile back-end development / Node Experience of CI/CD/DevOps for mobile apps Experience collaborating with clients or stakeholders, including clarifying requirements and presenting work at sprint demos Have experience delivering great outcomes for clients in an agency or professional services firm Your...

We’re looking for a Cyber Security Architect for our client on an initial contract basis, paying between £600 - £750 per day Outside IR35. This is a primarily remote role with occasional travel to London as required. This role will suit an experienced security professional with a strong background in security architecture, cloud security and enterprise security design within complex environments. You will be responsible for shaping and delivering secure architecture solutions across a range of business-critical projects, ensuring security is embedded across infrastructure, applications and cloud platforms. You will work closely with technical teams, project stakeholders and senior leadership to define security requirements, assess risks and implement secure-by-design principles across the organisation. You Will Need Proven Experience In The Following Cyber Security Architecture within enterprise or complex environments Designing secure solutions across cloud,...

Job Title: Senior Data Strategy Consultant Location: Fully Remote (UK-based) About the Role / Job Summary: A leading Further Education provider seeks a senior consultant to complete a strategic review of its data strategy landscape. You will partner with senior leadership to assess current capability and define a pragmatic roadmap for data, systems, governance, and investment. The engagement is business-facing and outcome-focused, blending technical depth with strategic advisory to improve insight, compliance, and decision-making across the organisation. Key Details: Contract Length: 3 months IR35 Status: Outside IR35 Rate: 400 - 600 per day (negotiable for the right candidate) Key Responsibilities: Lead a holistic review of MIS and data ecosystems, including systems, architecture, and reporting. Assess data quality, governance, stewardship, and ownership frameworks with a focus on Master Data Management. Evaluate the use of Microsoft data platforms...

AI Engineer - LLM & Agentic Systems London - Hybrid. Circa £500 - £675 per day (and negotiable DOE) Contract (Outside IR35) Mid-level, Senior & Lead. Agentic AI/Machine Learning. Company: Our client is a globally established B2B information and professional services business, operating across multiple high-value industry sectors. They have established data science and machine learning engineering teams already delivering in production, and are now expanding their AI capability significantly across the global organisation. This is a role for people who ship. If you've built LLM-powered systems and agentic workflows that are live in production - not demos, not prototypes - and you want to do that at genuine scale, this is worth applying for. What you'll be working on as an AI Engineer - LLM & Agentic Systems: Designing and building AI agents and agentic workflows - combining LLMs, RAG, reasoning, memory and tool orchestration to solve real,...

Business Change Project Manager (TOM/Policing) - NPPV3 & SC Location: London (occasional onsite travel) Contract Rate: £550-£650 per day (Outside IR35) Clearance: Active SC required NPPV3 Desired Overview We are seeking an experienced Business Change Project Manager with a strong background in UK policing to deliver key transformation initiatives. This role will focus on designing and implementing Target Operating Models (TOM) and driving process-led change across operational environments. Key Responsibilities Lead delivery of business change and transformation programmes Design and implement Target Operating Models (TOM) Drive process improvement and organisational change Engage senior stakeholders across policing and operational teams Deliver effective change management strategies and adoption plans Facilitate workshops, governance, and decision forums Manage risks, issues, and programme dependencies Required Experience Proven Business...

Mobile Engineer (iOS/Android) - Contract Location: London (2/3 days per week onsite) Contract Length: 6 months initial (likely extension through to year-end) Rate: Up to £600 per day IR35: Outside IR35 We're supporting a leading technology organisation that is looking for a Mobile Engineer to provide technical leadership across a portfolio of mobile initiatives. This is a unique opportunity for someone who sits between architecture, engineering, and delivery. The role is not focused on writing code day-to-day, but it does require someone with sufficient technical depth to challenge engineering decisions, assess delivery quality, and guide teams towards the right technical outcomes. You'll be joining an environment with significant mobile project demand and multiple delivery workstreams already underway. The challenge isn't a lack of engineering capacity - it's ensuring delivery teams are building the right solutions, following appropriate architectural patterns, and...

Senior AI Engineer (LLM/Agentic AI) | London (Hybrid) | £600–£700/day | Outside IR35 | 6 months Role: Senior AI Engineer (LLM/Agentic AI) Location: London (Hybrid – 1 day per week onsite in Victoria) Rate: £600–£700 per day IR35 Status: Outside IR35 Duration: 6 months (extension likely) Project Overview You'll join a major AI transformation programme within a global organisation focused on building production-grade AI systems at scale. The initiative spans both customer-facing AI products and internal business transformation, with a strong emphasis on delivering systems that are deployed, used, and continuously improved. We're seeking a Senior or Lead Machine Learning Scientist to design, build, and deploy AI agents and LLM-powered systems in real-world production environments. The team is building next-generation AI solutions using Large Language Models, Agentic AI, Retrieval-Augmented Generation (RAG), and intelligent automation to...

Job Title: Senior Data & MIS Consultant (FE Sector) - Contract (Outside IR35) Location: Fully Remote (UK-based) About the Role / Job Summary: A leading Further Education provider seeks a senior consultant to complete a strategic review of its MIS and data landscape. You will partner with senior leadership to assess current capability and define a pragmatic roadmap for data, systems, governance, and investment. The engagement is business-facing and outcome-focused, blending technical depth with strategic advisory to improve insight, compliance, and decision-making across the organisation. Key Details: Contract Length: 3 months IR35 Status: Outside IR35 Rate: £400 - £600 per day (negotiable for the right candidate) Key Responsibilities: Lead a holistic review of MIS and data ecosystems, including systems, architecture, and reporting. Assess data quality, governance, stewardship, and ownership frameworks with a focus on Master Data Management....

Senior Java Developer / AI Engineer - Design & Build Payment Product / Fintech / Banking. Spring Boot, Claude/Codex also essential. ANY PAYMENT PRODUCT CONSIDERD from Current Account OR SAVINGS OR ISA's OR Fixed Term Deposits, Lending etc. £600-£650/DAY OUTSIDE IR35 PAY. Our Fintech Challenger Bank client based in Central London seeks a dynamic, eager to learn and technically astute Java Software Engineer who has extensive experience in Designing & Building a Payment Product *NOT PAYMENT PLATFORM* so the ideal candidate will come from for e.g. a Challenger Bank or Fintech Payment Product Company. STRONG skills in Java, Spring Boot, AI (Claude or Codex), working in a Fintech Payment domain. YOU WILL NOT BE CONSIDERED IF YOU DO NOT HAVE FINTECH & DESIGN & BUILD PAYMENT PRODUCT EXPERIENCE WITH JAVA, SPRING & STRONG AI! Our client is hiring a hands-on SENIOR Software Engineer / Java Developer to support delivery and development of Savings products...

Job Title: Senior Data & MIS Consultant (FE Sector) - Contract (Outside IR35) Location: Fully Remote (UK-based) About the Role / Job Summary: A leading Further Education provider seeks a senior consultant to complete a strategic review of its MIS and data landscape. You will partner with senior leadership to assess current capability and define a pragmatic roadmap for data, systems, governance, and investment. The engagement is business-facing and outcome-focused, blending technical depth with strategic advisory to improve insight, compliance, and decision-making across the organisation. Key Details: Contract Length: 3 months IR35 Status: Outside IR35 Rate: £400 - £600 per day (negotiable for the right candidate) Key Responsibilities: Lead a holistic review of MIS and data ecosystems, including systems, architecture, and reporting. Assess data quality, governance, stewardship, and ownership frameworks with a...

Principal / Lead Engineer Python / Cloud / Terraform / IAM / DevOps / infrastructure-as-a-code IaC Rate: Circa £600 - £700 PD (Outside IR35), 6 Months Location: London / Hybrid x2 days We are seeking an experienced Principal / Lead Engineer to join a highly ambitious organisation building a large-scale, mission-critical data and technology platform. This is a unique opportunity to join at the earliest stages of a major programme and play a key role in shaping its technical foundations. Working closely with the CTO and a small team of senior engineers, you will lead the design and implementation of core infrastructure, establish engineering standards and practices, and make architectural decisions that will have long-term strategic impact. If you enjoy solving complex technical challenges, influencing technology strategy, and creating robust engineering foundations, this role offers an exceptional opportunity to make a lasting impact. Role &...