28 design systems designer jobs found

UI/UX Designer – Flagship Trading Platform (Finance) 📅 Contract: 12 months 💰 Rate: Up to £700/day (Outside IR35) 📍 Location: London (City) – Hybrid (1 day per week onsite) 🚀 The Opportunity Join one of the world’s leading investment banks as a UX/UI Designer on their flagship trading platform , now rolling out across the full Capital Markets business. Backed by senior leadership and embraced by users, this platform is transforming how trading teams operate — and you’ll be at the heart of its evolution. This role requires someone is is very strong with both UX and UI. Someone who is vastly experienced in Pixel perfect design without the need for wireframes etc. This is a high-impact, high-visibility role on a long-term programme that's shaping the future of institutional trading. With a strong design system in place and a clear strategy ahead, it's the perfect time to join and make your mark . You’ll enjoy flexible working (just 1 day a week...

Contract Senior Java Developer – Data Up to £700 per day Outside IR35 (6 month rolling) In office – City of London Quant Capital is hiring for a small, high-performing market maker in London. This is a junior-to-mid role focused primarily on Java development, with a secondary responsibility owning straightforward Python ETL/data ingestion into AWS and PostgreSQL. This is a growing team focused on data ingestion and building tooling for the wider firm. What you’ll do: Build and enhance Java backend services (APIs, batch jobs, integrations) used across the business Write clean, testable code with solid engineering discipline (testing, code review, debugging, production support) Maintain and extend Python-based ingestion/ETL (pragmatic plumbing, not heavy data engineering) Work with PostgreSQL (schemas, migrations, performant queries, data validation) Improve service reliability: monitoring/logging, sensible alerting, and predictable deployments via CI/CD...

'sQL Data Engineer (SQL Server, Python, DBA) Location: Remote- Some travel to London Contract: Contract Rate: £550-£600 Per Day- Outside IR35 We are currently looking for an experienced SQL Data Engineer to support the ongoing development and stability of a critical data platform. This role sits within an established technology team and focuses on BAU data engineering, database optimisation and ongoing data migration activity. The successful contractor will combine strong SQL development with hands on DBA capability, ensuring databases remain secure, performant and reliable while supporting continuous improvements to the wider data estate. This is an excellent opportunity for a pragmatic engineer who enjoys working on live production systems while helping evolve data architecture over time. Key Responsibilities Design, build and maintain SQL-based data solutions supporting business critical applications Develop and optimise stored procedures, queries...

Azure Bastion Consultant - 1 month contract - Fully Remote - Outside of IR35 My Customer is seeking an experienced Azure Bastion Consultant to support them in strengthening their remote access security within a live production Azure environment. This role will focus on designing and implementing a secure Azure Bastion solution to address vulnerabilities identified during recent penetration testing. The environment currently includes several virtual machines that require secure, stable access via VPN without exposing traditional RDP access points. The successful consultant will help design and build a Bastion-based approach that ensures secure connectivity while maintaining transparency and stability for existing VPN connections. Experience required from the Azure Bastion Consultant Strong experience implementing and configuring Azure Bastion in Microsoft Azure environments. Experience working with Azure networking, including VNets, NSGs, subnets, and VPN connectivity....

Head of Data | Contract | 6 months | Outside IR35 | £600-£700 per day I'm working with a major energy organisation who are going through a strategic transformation toward Real Time, AI driven decision making, modernised data infrastructure, and a deeply Embedded data culture. This role combines hands on leadership of automation and AI initiatives with the strategic responsibility of shaping the company's long term data vision. You will build a high performing team, elevate BI capabilities, and unlock value from rich customer data flows to improve customer understanding and operational efficiency. This is a 6 month engagement, outside IR35, requiring two days per week on site in London. The technology environment includes GCP, Bit query, and Looker. Key Responsibilities Business Intelligence, Automation & Advanced Analytics Transform BI from static reporting into dynamic, Real Time, self service analytics used across the organisation. Design and implement...

Java Developer - SC Cleared Location: London (1–2 days onsite per month) Contract: Outside IR35 Rate: £600–£675 per day Duration: 12 Month Contract Start: Immediate / Short Notice Preferred Eligibility: Active SC Clearance required (DV clearance ideally) Overview An experienced Java Developer is required to build and maintain scalable, high-performance applications within a secure public sector environment. Requirements Strong experience with Java & Springboot Solid Java back-end development experience Experience working in public sector Strong understanding of API integration and system design Active SC Clearance required (DV clearance ideally)

Full Stack Developer (React / TypeScript / Java) Location: London (1–2 days onsite per month) Contract: Outside IR35 Rate: £650–£700 per day Duration: 12 Month Contract Start: Immediate / Short Notice Preferred Eligibility: Active SC Clearance required (DV clearance ideally) Overview An experienced Full Stack Developer is required to build and maintain scalable, high-performance applications within a secure public sector environment. The role requires a 50/50 split across front-end and back-end development . Requirements Strong experience with React and TypeScript Solid Java back-end development experience Experience working in a full stack capacity (approx. 50/50 front-end/back-end) Strong understanding of API integration and system design Active SC Clearance required (DV clearance ideally)

Senior / Lead Full-Stack TypeScript Engineer (GraphQL Specialist) | Contract | TypeScript, Node.js, GraphQL | Large-Scale Media Platform | £500-600/day Outside IR35 | 6 Months | London Hybrid 2 days We’re supporting one of the UK’s largest consumer digital platforms as they scale their engineering capability across several high-traffic products used by millions of customers. They’re looking for Senior / Lead Full-Stack TypeScript Engineers with deep GraphQL expertise to help evolve and scale their API architecture. This role sits within a high-performing product engineering team responsible for building and maintaining critical services that power modern web and mobile experiences. You’ll play a key role in designing and evolving GraphQL schemas, improving API architecture, and delivering performant full-stack applications within a mature engineering environment. This is an opportunity to work on complex distributed systems at significant scale, collaborating...

Lead .NET/Full Stack Developer - Hybrid - £700/day Outside IR35 | C# | Azure | Event Driven Systems | Payments | API Driven We have a unique opportunity for a Lead .NET/Full Stack Developer to join a payments company. As the Lead .NET/Full Stack Developer , you’ll play a key role in shaping and scaling a high-throughput payments platform as the business enters its next phase of growth. This includes launching new products, enabling new partner integrations, and expanding a platform that already powers multiple live financial services products used globally. You’ll be building on top of a modern, cloud-native platform built with .NET and Azure , designed around API-first architecture and event-driven microservices . The platform supports complex payment flows, partner integrations, and high-volume transaction processing. This is a hands-on technical role where you’ll help drive engineering best practices, contribute to architectural decisions, and mentor...

Senior .NET / Full Stack Developer – Hybrid – £600/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven We have a unique opportunity for a Senior .NET / Full Stack Developer to join a payments company. As a Senior .NET / Full Stack Developer , you’ll play a key role in building and scaling a high-throughput payments platform as the business enters its next phase of growth. This includes launching new products, enabling new partner integrations, and expanding a platform that already powers multiple live financial services products used globally. You’ll be building on top of a modern, cloud-native platform built with .NET and Azure , designed around API-first architecture and event-driven microservices . The platform supports complex payment flows, partner integrations, and high-volume transaction processing. This is a hands-on senior engineering role where you’ll contribute to architectural discussions, drive engineering best...

Outside IR35 Contract - Senior/Lead Kotlin Engineer – Backend / Distributed Systems - £700-800/day Tier-One Global Investment Bank | London A tier-one global investment bank is expanding a new engineering group responsible for building modern digital financial platforms from the ground up. This team operates with the autonomy and pace of a start-up, backed by the scale and resources of one of the world’s largest financial institutions. Engineers work in small, highly collaborative teams designing and operating systems that power critical financial services used by millions of customers. This is a 6-month rolling contract, on a programme of work estimated to last 2-3 years. We’re looking for experienced Senior and Lead backend engineers who specialise in server-side Kotlin on the JVM , with a strong interest in building reliable distributed systems and scalable cloud platforms. You’ll help design and build high-performance backend services, working closely...

Java Developer - SC Cleared Location: London (1-2 days onsite per month) Contract: Outside IR35 Rate: £600-£675 per day Duration: 12 Month Contract Start: Immediate/Short Notice Preferred Eligibility: Active SC Clearance required (DV clearance ideally) Overview An experienced Java Developer is required to build and maintain scalable, high-performance applications within a secure public sector environment. Requirements Strong experience with Java & Springboot Solid Java Back End development experience Experience working in public sector Strong understanding of API integration and system design Active SC Clearance required (DV clearance ideally)

Full Stack Developer (React/TypeScript/Java) Location: London (1-2 days onsite per month) Contract: Outside IR35 Rate: £650-£700 per day Duration: 12 Month Contract Start: Immediate/Short Notice Preferred Eligibility: Active SC Clearance required (DV clearance ideally) Overview An experienced Full Stack Developer is required to build and maintain scalable, high-performance applications within a secure public sector environment. The role requires a 50/50 split across Front End and Back End development . Requirements Strong experience with React and TypeScript Solid Java Back End development experience Experience working in a full stack capacity (approx. 50/50 Front End/Back End) Strong understanding of API integration and system design Active SC Clearance required (DV clearance ideally)

Enterprise Architect - London Hybrid working Outside IR35 - Day rate up to £700 3 months initially - opportunity Contract to Permanent An Enterprise Architect is needed in London to join the IT Design Authority, analyse current technology and processes, identify improvements, and develop future plans. The role involves providing expertise in business processes, technology solutions, and architecture recommendations, as well as supporting business requirements and defining enterprise architecture. This position leads the enterprise architecture function and aligns IT initiatives with corporate strategy. Key skills and responsibilities, Possesses substantial expertise in Enterprise Architecture. Demonstrates valued proficiency in business separation. Evaluates internal operations, business development strategies, and IT processes to recommend improvements. Designs business architecture models that are closely aligned with strategic objectives, formulates and implements...

Application Architect - Contract Location: London (2-3 days per week on-site) Contract: 6 month Rate: £650 - £700 per day A leading international professional services organisation is seeking an experienced Applications Architect to support the selection, design, and global rollout of enterprise-grade applications across a complex, distributed environment. This role requires strong architectural capability across Microsoft 365, Azure, SaaS/COTS platforms, and enterprise integrations. You'll work embedded within the Strategy & Architecture function, supporting governance, design assurance, and technical leadership across multiple ongoing initiatives. Key Responsibilities: Act as the technical lead for new applications and cloud-hosted SaaS projects Own architectural design, governance, and technical decision-making Produce detailed architecture artefacts including HLDs, LLDs, patterns, and standards Support the global rollout and adoption of...

Application Architect - Contract Location: London (2–3 days per week on-site) Contract: 6 month Rate: £650 - £700 per day A leading international professional services organisation is seeking an experienced Applications Architect to support the selection, design, and global rollout of enterprise-grade applications across a complex, distributed environment. This role requires strong architectural capability across Microsoft 365, Azure, SaaS/COTS platforms, and enterprise integrations. You’ll work embedded within the Strategy & Architecture function, supporting governance, design assurance, and technical leadership across multiple ongoing initiatives. Key Responsibilities: Act as the technical lead for new applications and cloud-hosted SaaS projects Own architectural design, governance, and technical decision-making Produce detailed architecture artefacts including HLDs, LLDs, patterns, and standards Support the global rollout and adoption of...

Enterprise Architect – London Hybrid working Outside IR35 – Day rate up to £650-700 3 Months initially – opportunity Contract to Permanent An Enterprise Architect is needed in London to join the IT Design Authority, analyse current technology and processes, identify improvements, and develop future plans. The role involves providing expertise in business processes, technology solutions, and architecture recommendations, as well as supporting business requirements and defining enterprise architecture. This position leads the enterprise architecture function and aligns IT initiatives with corporate strategy. Key skills and responsibilities, Possesses substantial expertise in Enterprise Architecture. Demonstrates valued proficiency in business separation. Evaluates internal operations, business development strategies, and IT processes to recommend improvements. Manufacturing experience would be desirable Designs business architecture models that are...

Senior / Lead Full-Stack TypeScript Engineer (GraphQL Specialist) | Contract | TypeScript, Node.js, GraphQL | Large-Scale Media Platform | £500-600/day Outside IR35 | 6 Months | London Hybrid 2 days We’re supporting one of the UK’s largest consumer digital platforms as they scale their engineering capability across several high-traffic products used by millions of customers. They’re looking for Senior / Lead Full-Stack TypeScript Engineers with deep GraphQL expertise to help evolve and scale their API architecture. This role sits within a high-performing product engineering team responsible for building and maintaining critical services that power modern web and mobile experiences. You’ll play a key role in designing and evolving GraphQL schemas, improving API architecture, and delivering performant full-stack applications within a mature engineering environment. This is an opportunity to work on complex distributed systems at significant scale, collaborating...

Machine Learning Engineer - Python/PyTorch - £575-£675/day - Outside IR35 - Remote (UK) Contract: 6 months (extension likely) Day Rate: £575-£675 per day IR35 Status: Outside IR35 Location: Remote (UK) Core Stack: Python, PyTorch/TensorFlow, AWS, Docker, Kubernetes The Opportunity We're working with a growing technology team looking for a Machine Learning Engineer to help design, build and deploy machine learning systems used in real-world applications. This role sits at the intersection of software engineering, data science and applied machine learning, with a focus on taking models from experimentation through to scalable production ML systems. You'll work closely with engineers, data specialists and product teams to develop ML capabilities that support new and existing products. We're also happy to speak with Data Scientists who have strong Python engineering experience and have deployed machine learning models into production environments. What You'll Be...

Senior / Lead Full-Stack TypeScript Engineer (GraphQL Specialist) | Contract | TypeScript, Node.js, GraphQL | Large-Scale Media Platform | £500-600/day Outside IR35 | 6 Months | London Hybrid 2 days We’re supporting one of the UK’s largest consumer digital platforms as they scale their engineering capability across several high-traffic products used by millions of customers. They’re looking for Senior / Lead Full-Stack TypeScript Engineers with deep GraphQL expertise to help evolve and scale their API architecture. This role sits within a high-performing product engineering team responsible for building and maintaining critical services that power modern web and mobile experiences. You’ll play a key role in designing and evolving GraphQL schemas, improving API architecture, and delivering performant full-stack applications within a mature engineering environment. This is an opportunity to work on complex distributed systems at significant scale, collaborating...