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9 Contract API jobs in Charing Cross, Central London + 20 miles
67 exact matches jobs are outside your preferred location
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Location: Hybrid - 3 days per week onsite in Victoria, London (non-negotiable) Start Date: October - Contract Length: Until end of December (with likely extension) Day Rate: Up to £450/day (outside IR35, negotiable) A leading digital consultancy is seeking a highly skilled Senior Front-End Developer to join a blended delivery team working on a high-profile media application. This role offers the opportunity to collaborate closely with consultancy colleagues, client stakeholders, and nearshore partners to deliver an exceptional digital experience for end users. Key Responsibilities * Develop high-quality, performant, and scalable front-end solutions using Next.js, React, and TypeScript * Implement animations using Motion to create smooth, engaging user experiences * Ensure front-end performance, accessibility, and SEO best practices are met
Location: Hybrid - 3 days per week onsite in Victoria, London (non-negotiable) Start Date: October - Contract Length: Until end of December (with likely extension) Day Rate: Up to £450/day (outside IR35, negotiable) A leading digital consultancy is seeking a highly skilled Senior Front-End Developer to join a blended delivery team working on a high-profile media application. This role offers the opportunity to collaborate closely with consultancy colleagues, client stakeholders, and nearshore partners to deliver an exceptional digital experience for end users. Key Responsibilities * Develop high-quality, performant, and scalable front-end solutions using Next.js, React, and TypeScript * Implement animations using Motion to create smooth, engaging user experiences * Ensure front-end performance, accessibility, and SEO best practices are met
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I am currently working with a London-based Tier 1 investment bank who are actively seeking a Python Developer on a long-term contract basis. What you'll need to succeed * Strong Python programming experience within Financial Services - Mandatory * Good understanding of quantitative finance * Good experience developing and optimising Python-based calculators and models. * Strong experience developing high-performance APIs using Flask or FastAPI. * Expertise in Pandas, NumPy and other computing libraries. * Strong experience liaising with front-office stakeholders - What you'll get in return * Initial 6-month contract with extensions * Up to £700pd umbrella * London-based hybrid working - What you need to do nowIf you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.
I am currently working with a London-based Tier 1 investment bank who are actively seeking a Python Developer on a long-term contract basis. What you'll need to succeed * Strong Python programming experience within Financial Services - Mandatory * Good understanding of quantitative finance * Good experience developing and optimising Python-based calculators and models. * Strong experience developing high-performance APIs using Flask or FastAPI. * Expertise in Pandas, NumPy and other computing libraries. * Strong experience liaising with front-office stakeholders - What you'll get in return * Initial 6-month contract with extensions * Up to £700pd umbrella * London-based hybrid working - What you need to do nowIf you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.
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Overview - We are seeking an experienced PHP developer to join our development team. The role involves building and maintaining web applications that integrate with our core quote and sales engines. The successful candidate will have strong PHP and MySQL expertise, with the ability to write efficient, well-structured code without over-reliance on heavy frameworks. Key Responsibilities - Develop and maintain PHP applications that integrate with our back-end systems. Design and optimise MySQL databases, including complex queries and schema design for performance and scalability. Implement APIs for third-party website integration. Work across both back-end and front-end as needed (HTML, CSS, JavaScript). Ensure code quality, efficiency, and security best practices. Collaborate with team members to deliver reliable and maintainable solutions. Essential Skills & Experience
Overview - We are seeking an experienced PHP developer to join our development team. The role involves building and maintaining web applications that integrate with our core quote and sales engines. The successful candidate will have strong PHP and MySQL expertise, with the ability to write efficient, well-structured code without over-reliance on heavy frameworks. Key Responsibilities - Develop and maintain PHP applications that integrate with our back-end systems. Design and optimise MySQL databases, including complex queries and schema design for performance and scalability. Implement APIs for third-party website integration. Work across both back-end and front-end as needed (HTML, CSS, JavaScript). Ensure code quality, efficiency, and security best practices. Collaborate with team members to deliver reliable and maintainable solutions. Essential Skills & Experience
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New Senior Data Engineer Contract Roles We have multiple new Senior Data Engineer Contract roles for a London based financial services client of ours. This would be working on a greenfield project in a new team building out a digital platform. This is outside IR35, 1-2 days per week onsite in London and initial 6 month contract and an immediate start. The ideal candidate will be a data engineer from a software engineering background with machine learning experience. The rate available for this position is: £550-575pd * ETL / Data Pipelines / Data Integration * Python & Java (for building data pipelines & APIs) * Snowflake * AWS * Machine Learning * React or Angular Please apply directly or email me your CV on
New Senior Data Engineer Contract Roles We have multiple new Senior Data Engineer Contract roles for a London based financial services client of ours. This would be working on a greenfield project in a new team building out a digital platform. This is outside IR35, 1-2 days per week onsite in London and initial 6 month contract and an immediate start. The ideal candidate will be a data engineer from a software engineering background with machine learning experience. The rate available for this position is: £550-575pd * ETL / Data Pipelines / Data Integration * Python & Java (for building data pipelines & APIs) * Snowflake * AWS * Machine Learning * React or Angular Please apply directly or email me your CV on
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C# Engineer (Blazor Experience)
C# Engineer (Blazor Experience)
Hays
MK1, Milton Keynes
£350.0 - £400.0 per day + £350 - 400 per day Outside IR35
Role OverviewOur client based in Milton Keynes is looking for a passionate and skilled C# Engineer with proven experience in Blazor to join their growing development team. This is a fantastic opportunity to work on high-performance web applications in a collaborative and innovative environment. You'll be working closely with a talented team of developers, designers, and product managers to deliver cutting-edge solutions that drive real value. Responsibilities * Build and maintain interactive, scalable web applications using Blazor and .NET technologies. * Collaborate with cross-functional teams to define, design, and implement new features. * Ensure code quality through code reviews, unit testing, and adherence to best practices. * Troubleshoot and resolve issues across the full stack. * Contribute to technical discussions and share knowledge with the wider team.
Role OverviewOur client based in Milton Keynes is looking for a passionate and skilled C# Engineer with proven experience in Blazor to join their growing development team. This is a fantastic opportunity to work on high-performance web applications in a collaborative and innovative environment. You'll be working closely with a talented team of developers, designers, and product managers to deliver cutting-edge solutions that drive real value. Responsibilities * Build and maintain interactive, scalable web applications using Blazor and .NET technologies. * Collaborate with cross-functional teams to define, design, and implement new features. * Ensure code quality through code reviews, unit testing, and adherence to best practices. * Troubleshoot and resolve issues across the full stack. * Contribute to technical discussions and share knowledge with the wider team.
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Job Title: Salesforce Vlocity Developer - Location: Windsor, UK (Hybrid 1 day per week onsite) Contract Duration: 6 Months - Day Rate: £500 Inside IR35 - About the Role - We are looking for an experienced Salesforce Vlocity Developer to join a major business unit on a 6-month contract. This is a hybrid role requiring weekly onsite presence in Windsor, offering an exciting opportunity to work on cutting-edge Salesforce solutions within a collaborative team environment. Key Responsibilities * Design and develop custom Vlocity solutions on the Salesforce platform, including CPQ, CLM, and OmniStudio. * Translate business and product requirements into technical specifications. * Build and maintain Vlocity data models, including objects, fields, and relationships. * Develop custom Apex classes, triggers, and Lightning Web Components.
Job Title: Salesforce Vlocity Developer - Location: Windsor, UK (Hybrid 1 day per week onsite) Contract Duration: 6 Months - Day Rate: £500 Inside IR35 - About the Role - We are looking for an experienced Salesforce Vlocity Developer to join a major business unit on a 6-month contract. This is a hybrid role requiring weekly onsite presence in Windsor, offering an exciting opportunity to work on cutting-edge Salesforce solutions within a collaborative team environment. Key Responsibilities * Design and develop custom Vlocity solutions on the Salesforce platform, including CPQ, CLM, and OmniStudio. * Translate business and product requirements into technical specifications. * Build and maintain Vlocity data models, including objects, fields, and relationships. * Develop custom Apex classes, triggers, and Lightning Web Components.
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London - hybrid - 8 Months+ Inside IR35- Umbrella only * Proficient with React Native and Expo open source modules (bare workflow) * Strong React fundamentals: hooks, context, state management * React Navigation, app routing JavaScript & TypeScript * Advanced JavaScript (ES6+) and TypeScript * Type safety and maintainability for large-scale projects * Native Platform Integration Swift (iOS) and Kotlin (Android) for custom native modules * Native module integration in Expo * React Native projects * State Management & Storage Redux for complex state management MMKV for high-performance key-value storage * Architecture & APIs System Design * Deep expertise in complex React Native architectures and patterns * Subject matter expert for technical problem-solving and architectural guidance * Designs solutions for the most challenging technical requirements GraphQL Integratio
London - hybrid - 8 Months+ Inside IR35- Umbrella only * Proficient with React Native and Expo open source modules (bare workflow) * Strong React fundamentals: hooks, context, state management * React Navigation, app routing JavaScript & TypeScript * Advanced JavaScript (ES6+) and TypeScript * Type safety and maintainability for large-scale projects * Native Platform Integration Swift (iOS) and Kotlin (Android) for custom native modules * Native module integration in Expo * React Native projects * State Management & Storage Redux for complex state management MMKV for high-performance key-value storage * Architecture & APIs System Design * Deep expertise in complex React Native architectures and patterns * Subject matter expert for technical problem-solving and architectural guidance * Designs solutions for the most challenging technical requirements GraphQL Integratio
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Implement schema registries, data contracts, and API-first data governance.
Implement schema registries, data contracts, and API-first data governance.
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REST API development
REST API development
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Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
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Knowledge of API design and development best practices
Knowledge of API design and development best practices
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We collaborate closely with product, engineering, research, and GTM teams to ensure the developer journeyfrom initial API call to full production deploymentis seamless, effective, and delightful.
We collaborate closely with product, engineering, research, and GTM teams to ensure the developer journeyfrom initial API call to full production deploymentis seamless, effective, and delightful.
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Wallarm is the only solution that unifies best-in-class API Security and WAAP (Next-Gen WAF) capabilities to protect your entire API and web application portfolio in multi-cloud and cloud-native environments. * Recommend API security best practices, application architectures, platforms and application infrastructure required to successfully implement a complete API security solution based on Wallarm - Prior experience in API security, API management, SIEM, Software Development, DevOps, DevSecOps, or web application firewalls is preferred
Wallarm is the only solution that unifies best-in-class API Security and WAAP (Next-Gen WAF) capabilities to protect your entire API and web application portfolio in multi-cloud and cloud-native environments. * Recommend API security best practices, application architectures, platforms and application infrastructure required to successfully implement a complete API security solution based on Wallarm - Prior experience in API security, API management, SIEM, Software Development, DevOps, DevSecOps, or web application firewalls is preferred
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Solid understanding of RESTful web services and API design principles
Solid understanding of RESTful web services and API design principles
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Work closely with Windows OS components , including Windows Registry, COM API, Windows Events, and system services . * Strong understanding of Windows internals , including services, registry, COM API, and event handling.
Work closely with Windows OS components , including Windows Registry, COM API, Windows Events, and system services . * Strong understanding of Windows internals , including services, registry, COM API, and event handling.
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Oversee API integrations, metadata schemas, and tool interoperability across platforms.
Oversee API integrations, metadata schemas, and tool interoperability across platforms.
Strong understanding of API design
Strong understanding of API design
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Reporting to our Solutions Architect Team Lead, Alex Karet - About us - At hyperexponential, our mission is to help the world take more risk - safely. Our SaaS platform, hx Renew , is transforming the insurance industry by enabling insurers to make better decisions, faster and more confidently than ever before. In the seven years since our founding, weve become the market leader. We work with 40+ customers globally - including a third of the London Market - and were only just getting started. Its always the best time to join hyperexponential. But the best best time? Thats now. Field Engineering at hyperexponential - Our Field Engineering team provides a world-class technical capability to our Revenue function, with a mission to supercharge its three core pillars of Sales, Marketing, and Customer. Our primary objective is to help our customers realise the full value an
Reporting to our Solutions Architect Team Lead, Alex Karet - About us - At hyperexponential, our mission is to help the world take more risk - safely. Our SaaS platform, hx Renew , is transforming the insurance industry by enabling insurers to make better decisions, faster and more confidently than ever before. In the seven years since our founding, weve become the market leader. We work with 40+ customers globally - including a third of the London Market - and were only just getting started. Its always the best time to join hyperexponential. But the best best time? Thats now. Field Engineering at hyperexponential - Our Field Engineering team provides a world-class technical capability to our Revenue function, with a mission to supercharge its three core pillars of Sales, Marketing, and Customer. Our primary objective is to help our customers realise the full value an
Additionally, our apps and API are trusted by tens of thousands of drivers and fleets including Blue Badge innovators Motability Operations.
Additionally, our apps and API are trusted by tens of thousands of drivers and fleets including Blue Badge innovators Motability Operations.
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Through our platform a merchant can connect via a simple API connection to the world's payment ecosystem, increasing conversion at lower cost and satisfying their entire payments needs.
Through our platform a merchant can connect via a simple API connection to the world's payment ecosystem, increasing conversion at lower cost and satisfying their entire payments needs.
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Data engineering to build data pipelines through integration and API's.
Data engineering to build data pipelines through integration and API's.
Upvests Investment API is easy to integrate so that fintechs and enterprises alike can save resources and fully focus on their core business.? Were building the first European Investment API to enable any financial institution offering a wide range of efficient and transparent investment products, such as stocks and ETFs in nominal, portfolio, and fractional form. * Continuous learning: The complex yet fascinating field of investments, building an API product on a state-of-the-art tech stack, and working with the most relevant fintechs and financial institutions provide for an incredibly rewarding learning experience.
Upvests Investment API is easy to integrate so that fintechs and enterprises alike can save resources and fully focus on their core business.? Were building the first European Investment API to enable any financial institution offering a wide range of efficient and transparent investment products, such as stocks and ETFs in nominal, portfolio, and fractional form. * Continuous learning: The complex yet fascinating field of investments, building an API product on a state-of-the-art tech stack, and working with the most relevant fintechs and financial institutions provide for an incredibly rewarding learning experience.
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Good understanding of API technologies and troubleshooting
Good understanding of API technologies and troubleshooting
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6 month outside IR35 contract - As part of our exciting growth journey, were expanding our Mobile Engineering team and are on the lookout for a talented Android Engineer to join us on a hybrid basis at our London office. This is a rare chance to work on high impact greenfield products for some of the biggest and most iconic sports brands in the world. Youll be at the forefront of building modern, scalable apps from the ground up, helping shape the future of fan engagement across global sport. Youll bring technical expertise and strong delivery focus. Contributing high-quality code, collaborating closely with our in-house teams, and helping us hit key milestones. Youll be embedded in a passionate, cross-functional team and supported to do your best work while working on fast-moving, purpose-driven projects that reach millions of fans worldwide. Requirements
6 month outside IR35 contract - As part of our exciting growth journey, were expanding our Mobile Engineering team and are on the lookout for a talented Android Engineer to join us on a hybrid basis at our London office. This is a rare chance to work on high impact greenfield products for some of the biggest and most iconic sports brands in the world. Youll be at the forefront of building modern, scalable apps from the ground up, helping shape the future of fan engagement across global sport. Youll bring technical expertise and strong delivery focus. Contributing high-quality code, collaborating closely with our in-house teams, and helping us hit key milestones. Youll be embedded in a passionate, cross-functional team and supported to do your best work while working on fast-moving, purpose-driven projects that reach millions of fans worldwide. Requirements
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The Mission - At FLOX, we believe smarter farms lead to thriving chickens and healthier lives. Our mission is simple: healthier chickens benefit everyone. Thats why we built FLOX360, a system that uses Computer Vision, smart sensors, and real-time insights to transform poultry farming. By helping farmers improve welfare and efficiency, FLOX360 creates a win-win for birds, farmers, the environment, and people everywhere. Today, were watching 60 million chickens a year. We believe we are setting the standard for animal welfare and smart farming - and were just getting started. The People - Were a diverse team of engineers and entrepreneurs, representing over 13 nationalities and all walks of life - even a few vegetarians! We are brought together by a shared passion for meaningful impact. Empathetic Artisan - We approach our work with care, artistry, and genuine empathy
The Mission - At FLOX, we believe smarter farms lead to thriving chickens and healthier lives. Our mission is simple: healthier chickens benefit everyone. Thats why we built FLOX360, a system that uses Computer Vision, smart sensors, and real-time insights to transform poultry farming. By helping farmers improve welfare and efficiency, FLOX360 creates a win-win for birds, farmers, the environment, and people everywhere. Today, were watching 60 million chickens a year. We believe we are setting the standard for animal welfare and smart farming - and were just getting started. The People - Were a diverse team of engineers and entrepreneurs, representing over 13 nationalities and all walks of life - even a few vegetarians! We are brought together by a shared passion for meaningful impact. Empathetic Artisan - We approach our work with care, artistry, and genuine empathy
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