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77 Contract API jobs in Piccadilly, Central London + 20 miles
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Full Stack Software Developer ASP.NET C# jQuery HTML5 SQL - The ideal candidatewill be responsible for building and maintaining internal and external facing web applications. You will be working in a team of experienced developers to build highly performing systems that improve efficiency. Teams use Agile Methodology and follow Scrum and Kanban Frameworks. *ASP.NET C# jQuery HTML5 SQL Azure GIT - Job requirements - Role Responsibilities * Maintain existing products and provide resolutions to Escalated Support Calls within the agreed SLAs * Require testing developments from end to end before passed to Acceptance Testing * Ability to adapt quickly to an existing, complex environment * Evaluate, redesign and modify existing program logic to quickly and efficiently meet and exceed customer needs, by integrating new requirements and by applying proven development paths
Full Stack Software Developer ASP.NET C# jQuery HTML5 SQL - The ideal candidatewill be responsible for building and maintaining internal and external facing web applications. You will be working in a team of experienced developers to build highly performing systems that improve efficiency. Teams use Agile Methodology and follow Scrum and Kanban Frameworks. *ASP.NET C# jQuery HTML5 SQL Azure GIT - Job requirements - Role Responsibilities * Maintain existing products and provide resolutions to Escalated Support Calls within the agreed SLAs * Require testing developments from end to end before passed to Acceptance Testing * Ability to adapt quickly to an existing, complex environment * Evaluate, redesign and modify existing program logic to quickly and efficiently meet and exceed customer needs, by integrating new requirements and by applying proven development paths
NEWFEATURED
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Description - Role Overview: We are seeking a skilled Calypso Developer to support a strategic transformation programme aimed at establishing Calypso as the single book of record for all OTC Derivative trades within our Securities Services business. This role will be instrumental in expanding Calypso coverage, automating trade capture, lifecycle events, and pricing for a wide range of products and clients. ________________________________________ Key Responsibilities: Develop and configure Calypso to support new OTC derivative products including: o CDS (Options) o Performance Swaps Market Index o CDS Index Tranche Automate trade capture and lifecycle event processing for ~9 clients currently using manual input. Implement automated pricing solutions for ~11 clients currently priced manually. Collaborate with business analysts, product owners, and operations teams to ga
Description - Role Overview: We are seeking a skilled Calypso Developer to support a strategic transformation programme aimed at establishing Calypso as the single book of record for all OTC Derivative trades within our Securities Services business. This role will be instrumental in expanding Calypso coverage, automating trade capture, lifecycle events, and pricing for a wide range of products and clients. ________________________________________ Key Responsibilities: Develop and configure Calypso to support new OTC derivative products including: o CDS (Options) o Performance Swaps Market Index o CDS Index Tranche Automate trade capture and lifecycle event processing for ~9 clients currently using manual input. Implement automated pricing solutions for ~11 clients currently priced manually. Collaborate with business analysts, product owners, and operations teams to ga
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Salesforce QA Engineer
Salesforce QA Engineer
Yolk Recruitment
SM4, Morden
£50000.00 - £60000.00 per annum + + excellent benefits
Yolk Recruitment are working with a leading global organisation that continues to grow and invest in its Salesforce capability. Known for its collaborative culture and commitment to continuous improvement, this is an excellent opportunity for a Salesforce QA Tester to make a real impact within a forward-thinking technology team. We're looking for someone who's passionate about quality and experienced in ensuring Salesforce solutions meet the highest standards of reliability and performance. You'll work closely with cross-functional teams to test, validate, and optimise Salesforce functionality, integrations, and custom developments. * Collaborate with developers, business analysts, and project teams to understand requirements and define effective test strategies. * Perform thorough manual testing of Salesforce applications, identifying and documenting defects for ...
Yolk Recruitment are working with a leading global organisation that continues to grow and invest in its Salesforce capability. Known for its collaborative culture and commitment to continuous improvement, this is an excellent opportunity for a Salesforce QA Tester to make a real impact within a forward-thinking technology team. We're looking for someone who's passionate about quality and experienced in ensuring Salesforce solutions meet the highest standards of reliability and performance. You'll work closely with cross-functional teams to test, validate, and optimise Salesforce functionality, integrations, and custom developments. * Collaborate with developers, business analysts, and project teams to understand requirements and define effective test strategies. * Perform thorough manual testing of Salesforce applications, identifying and documenting defects for ...
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Software Engineer
Software Engineer
Inspire People
CR2, South Croydon
£41100 - £44400 per annum + 29% pension + Civil Service benefits
HM Land Registry (HMLR) are modernising the systems and services that underpin property ownership across England and Wales - some of the most valuable data in the UK economy. As a Software Developer, you'll play an important role in designing, building and supporting the digital services that help secure property rights and enable the housing market to function. Salary up to £44,400, 29% employer pension contribution plus full Civil Service benefits. Flexible, hybrid working from 14 office locations across the UK. Job Summary - You will join HMLR's Software Development Practice, part of the wider Digital, Data and Technology (DDaT) directorate. The practice includes Developers who work in multidisciplinary agile teams with product managers, delivery managers, testers, business analysts and user researchers.
HM Land Registry (HMLR) are modernising the systems and services that underpin property ownership across England and Wales - some of the most valuable data in the UK economy. As a Software Developer, you'll play an important role in designing, building and supporting the digital services that help secure property rights and enable the housing market to function. Salary up to £44,400, 29% employer pension contribution plus full Civil Service benefits. Flexible, hybrid working from 14 office locations across the UK. Job Summary - You will join HMLR's Software Development Practice, part of the wider Digital, Data and Technology (DDaT) directorate. The practice includes Developers who work in multidisciplinary agile teams with product managers, delivery managers, testers, business analysts and user researchers.
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Senior Software Developer - Ruby
Senior Software Developer - Ruby
SUMMER-BROWNING ASSOCIATES LIMITED
E1, East London
£600 - £650 per day + competitive
Summer-Browning Associates are currently supporting our Central Government client who are seeking a Senior Software Engineer who is highly proficient with Ruby programming on an initial 12 month contract (London or Manchester - hybrid) * Work within a multi-disciplinary product team and lead the design, development, and maintenance of robust, scalable open data services and APIs * Provide strategic technical leadership by setting software architecture, engineering practices, and technical direction across the Team * Define and evolve scalable, secure design patterns and coding standards, ensuring alignment with standards and cross-government platforms * Collaborate with teams to select technologies, shape roadmaps, and deliver resilient, maintainable digital services that meet programme goals * Represent the department at technical forums, open-source communities, and
Summer-Browning Associates are currently supporting our Central Government client who are seeking a Senior Software Engineer who is highly proficient with Ruby programming on an initial 12 month contract (London or Manchester - hybrid) * Work within a multi-disciplinary product team and lead the design, development, and maintenance of robust, scalable open data services and APIs * Provide strategic technical leadership by setting software architecture, engineering practices, and technical direction across the Team * Define and evolve scalable, secure design patterns and coding standards, ensuring alignment with standards and cross-government platforms * Collaborate with teams to select technologies, shape roadmaps, and deliver resilient, maintainable digital services that meet programme goals * Represent the department at technical forums, open-source communities, and
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Enterprise Solution Architect - London Insurance Markets
Enterprise Solution Architect - London Insurance Markets
Sanderson Recruitment
EC1, City of London
£485 - £950 per day + Umbrella Engagement
Senior Solution Architect / Enterprise Solutuion Architect - Our client operate within the London Market insurance industry, recognised for its innovation, scale, and commitment to digital transformation. The organisation is undertaking a multi-year technology modernisation initiative aimed at enhancing core underwriting, claims, and broking platforms - and this role plays a pivotal part in shaping that future. The Opportunity - We've had a brilliant brief for a Senior Solution / Enterprise Architect to join a well-known brand within the London Market. You'll work closely with the Head of Architecture and a talented team of Enterprise and Senior Solution Architects to help define and evolve the organisation's strategic technology roadmap. This is a software and application-focused role, ideal for someone who brings deep London Market insurance domain expertise and a s
Senior Solution Architect / Enterprise Solutuion Architect - Our client operate within the London Market insurance industry, recognised for its innovation, scale, and commitment to digital transformation. The organisation is undertaking a multi-year technology modernisation initiative aimed at enhancing core underwriting, claims, and broking platforms - and this role plays a pivotal part in shaping that future. The Opportunity - We've had a brilliant brief for a Senior Solution / Enterprise Architect to join a well-known brand within the London Market. You'll work closely with the Head of Architecture and a talented team of Enterprise and Senior Solution Architects to help define and evolve the organisation's strategic technology roadmap. This is a software and application-focused role, ideal for someone who brings deep London Market insurance domain expertise and a s
FEATURED
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Data Storage Engineer
Data Storage Engineer
Deerfoot Recruitment Solutions
EC2, City of London, EC2Y 9AN
Up to £635.63 per day
Fully Onsite in London (EC2Y / Moorgate) International Banking Group £635.63pd Inside IR35 - 01/01/26 to 31/08/26?????? Are you ready to take ownership of cutting-edge data storage solutions across a major international banking group? As a Data Storage Engineer, you'll join a collaborative technical team with responsibility for designing, implementing, configuring and supporting mission-critical storage and backup infrastructure, including a Dell EMC environment, PowerStore, PowerScale/Isilon and ECM/Elastic Cloud Storage. Key Responsibilities * Manage and maintain block, file, and object data storage systems for business systems and end users. * Provide technical ownership and support for all online storage technologies, including connectivity and backup. * Deliver strategic projects, updates, and improvement plans for storage and backup systems.
Fully Onsite in London (EC2Y / Moorgate) International Banking Group £635.63pd Inside IR35 - 01/01/26 to 31/08/26?????? Are you ready to take ownership of cutting-edge data storage solutions across a major international banking group? As a Data Storage Engineer, you'll join a collaborative technical team with responsibility for designing, implementing, configuring and supporting mission-critical storage and backup infrastructure, including a Dell EMC environment, PowerStore, PowerScale/Isilon and ECM/Elastic Cloud Storage. Key Responsibilities * Manage and maintain block, file, and object data storage systems for business systems and end users. * Provide technical ownership and support for all online storage technologies, including connectivity and backup. * Deliver strategic projects, updates, and improvement plans for storage and backup systems.
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About This Opportunity - We are supporting Welldone Consulting in their search for a founding Head of Delivery. This is a unique opportunity to establish, shape, and grow a business at the forefront of accessible mobile app consulting in the UK. About Welldone Consulting - Welldone Consulting focuses on building future-ready, inclusive, and commercially strategic mobile apps. Their mission is to help organisations not just comply with the European Accessibility Act but also to drive greater loyalty, adoption, and revenue by improving mobile user experiences for everyone. Role Purpose * Lead client engagements from initial contact to completion. * Develop frameworks for delivery and build an associate consultant model. * Serve as the public face and thought leader for the consultancy. Key Responsibilities - Client Engagement * Act as the main point of contact through p
About This Opportunity - We are supporting Welldone Consulting in their search for a founding Head of Delivery. This is a unique opportunity to establish, shape, and grow a business at the forefront of accessible mobile app consulting in the UK. About Welldone Consulting - Welldone Consulting focuses on building future-ready, inclusive, and commercially strategic mobile apps. Their mission is to help organisations not just comply with the European Accessibility Act but also to drive greater loyalty, adoption, and revenue by improving mobile user experiences for everyone. Role Purpose * Lead client engagements from initial contact to completion. * Develop frameworks for delivery and build an associate consultant model. * Serve as the public face and thought leader for the consultancy. Key Responsibilities - Client Engagement * Act as the main point of contact through p
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Deep Azure expertise, with M365 ecosystem governance: Power Platform, E5 optimisation, Azure integration services such as Logic Apps, Service Bus, Event Grid, API Management).
Deep Azure expertise, with M365 ecosystem governance: Power Platform, E5 optimisation, Azure integration services such as Logic Apps, Service Bus, Event Grid, API Management).
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Backend Software Engineer C# .Net - Asset Management
Backend Software Engineer C# .Net - Asset Management
Client Server
The City, EC4
£100000 - £150000 per annum + bonus + benefits
There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js.
There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js.
NEWPREMIUM
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Senior Quality Assurance Engineer
Senior Quality Assurance Engineer
Alexander Edward James Consulting Limited
EC2, City of London
From £60,000 to £80,000 per annum
Build and expand API-level test coverage for distributed and event-driven services.
Build and expand API-level test coverage for distributed and event-driven services.
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Senior Full Stack Developer
Senior Full Stack Developer
HBG Recruitment
South East
£85000 - £95000 per annum + pension, and amazing benefits package
Exposure to AWS (S3, Lambda, EC2, API Gateway)
Exposure to AWS (S3, Lambda, EC2, API Gateway)
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Senior Full Stack Developer
Senior Full Stack Developer
HBG Recruitment
Campden Hill, W8 5HY
£85000 - £95000 per annum + pension, and amazing benefits package
Exposure to AWS (S3, Lambda, EC2, API Gateway)
Exposure to AWS (S3, Lambda, EC2, API Gateway)
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SharePoint Developer
SharePoint Developer
PPF (Pension Protection Fund)
CR0, Croydon
From £56,000 to £61,500 per annum plus Civil Service pension and other
You should be confident working with cloud technologies like Azure, API development and integration, and SharePoint administration.
You should be confident working with cloud technologies like Azure, API development and integration, and SharePoint administration.
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AI (artificial intelligence) DevOps Engineer
AI (artificial intelligence) DevOps Engineer
Huxley Associates
EC1, City of London
£60000 - £90000 per annum
You'll also ensure alignment with enterprise-grade security practices, including zero trust principles, identity-aware routing, and integration with Azure API Management and Application Gateway. * API Gateway, Azure API Management (APIM), Azure Application Gateway
You'll also ensure alignment with enterprise-grade security practices, including zero trust principles, identity-aware routing, and integration with Azure API Management and Application Gateway. * API Gateway, Azure API Management (APIM), Azure Application Gateway
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Writing (looking for experience with Scala, JavaScript, Java or any ideally procedural programming or alternatively object-orientated language), running and debugging functional automation tests on an integrated development environment (IDE) for front-end and API testing and frameworks including Cucumber BDD or Junit or Rest Assured
Writing (looking for experience with Scala, JavaScript, Java or any ideally procedural programming or alternatively object-orientated language), running and debugging functional automation tests on an integrated development environment (IDE) for front-end and API testing and frameworks including Cucumber BDD or Junit or Rest Assured
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Front-End QA Tester
Front-End QA Tester
REC SOLUTIONS LIMITED
The City, EC4
Competitive base Plus Discretionary Bonus and Benefits
API testing experience (REST/GraphQL) - both automated and manual * Python knowledge (for backend/API testing)
API testing experience (REST/GraphQL) - both automated and manual * Python knowledge (for backend/API testing)
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Experience with API testing tools such as Postman.
Experience with API testing tools such as Postman.
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Principal Software Engineer - Unified Client Experience (UCX)
Principal Software Engineer - Unified Client Experience (UCX)
Hargreaves Lansdown
EC1, City of London
Up to £11500 per annum + Generous bonus, pension, PMI & more
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
NEWFEATURED
Senior Software Engineer - Unified Client Experience (UCX)
Senior Software Engineer - Unified Client Experience (UCX)
Hargreaves Lansdown
EC1, City of London
£75000 - £95000 per annum + Generous bonus, pension, PMI & more
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
NEWFEATURED
Software Engineering Manager - Unified Client Experience (UCX)
Software Engineering Manager - Unified Client Experience (UCX)
Hargreaves Lansdown
EC1, City of London
£90000 - £115000 per annum + Generous bonus, pension, PMI and more
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
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Strong background in test automation ((Playwright, Appium, API,etc.)
Strong background in test automation ((Playwright, Appium, API,etc.)
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Date: 30 Sept 2025 - Location: London, GB, EC2V 7AD - Company: Paysafe - Paysafe is a leading payments platform with an extensive track record of serving merchants and consumers in the global entertainment sectors. Its core purpose is to enable businesses and consumers to connect and transact seamlessly through industry-leading capabilities in payment processing, digital wallet, and online cash solutions. With 29 years of online payment experience, an annualized transactional volume of $152 billion in 2024, and approximately 3,300 employees located in 12+ countries, Paysafe connects businesses and consumers across 260 payment types in 48 currencies around the world. Delivered through an integrated platform, Paysafe solutions are geared toward mobile-initiated transactions, real-time analytics and the convergence between brick-and-mortar and online payments.
Date: 30 Sept 2025 - Location: London, GB, EC2V 7AD - Company: Paysafe - Paysafe is a leading payments platform with an extensive track record of serving merchants and consumers in the global entertainment sectors. Its core purpose is to enable businesses and consumers to connect and transact seamlessly through industry-leading capabilities in payment processing, digital wallet, and online cash solutions. With 29 years of online payment experience, an annualized transactional volume of $152 billion in 2024, and approximately 3,300 employees located in 12+ countries, Paysafe connects businesses and consumers across 260 payment types in 48 currencies around the world. Delivered through an integrated platform, Paysafe solutions are geared toward mobile-initiated transactions, real-time analytics and the convergence between brick-and-mortar and online payments.
Location: Central London or Remote [Moldova] Job Type: Full time - Why join us? If you love food and technology as much as we do, youll love life at Vita Mojo. Were on a mission to revolutionise the hospitality experience for operators and their customers. Through our smart digital products, were powering the digital transformation of your favourite pubs, bars and restaurants. And we want a world where everyone gets the meal theyre hoping for. Each and every time. Our Vita Mojo DNA - Were proud to have built an award-winning digital platform. Vita Mojo is a positive, energetic and forward-thinking place to work, and when you become a Moji, youll be joining a supportive team whove always got your back. Our passion for technology and food is matched only by our support for our people. About the role - Your mission as a Vita Mojo Full Stack Engineer is to help us bring o
Location: Central London or Remote [Moldova] Job Type: Full time - Why join us? If you love food and technology as much as we do, youll love life at Vita Mojo. Were on a mission to revolutionise the hospitality experience for operators and their customers. Through our smart digital products, were powering the digital transformation of your favourite pubs, bars and restaurants. And we want a world where everyone gets the meal theyre hoping for. Each and every time. Our Vita Mojo DNA - Were proud to have built an award-winning digital platform. Vita Mojo is a positive, energetic and forward-thinking place to work, and when you become a Moji, youll be joining a supportive team whove always got your back. Our passion for technology and food is matched only by our support for our people. About the role - Your mission as a Vita Mojo Full Stack Engineer is to help us bring o
Your Opportunity: Based in our Enfield office with a hybrid working model, youll join the Global Customer Satisfaction department as a Technical Support Specialist. If youre passionate about providing outstanding customer support, building strong client relationships, and enjoy working in a fast-paced, technology-focused environment, this is the role for you! Were seeking a dedicated French-speaking Technical Support Specialist to assist customers using EBSCO software solutions and help ensure their success. * Troubleshoot and resolve product-related issues * Guide clients through installation, configuration, and upgrades * Monitor customer casework and ensure timely resolution * Conduct proactive service meetings and communicate updates * Advocate for customer needs across internal teams * Deliver internal training and maintain support documentation
Your Opportunity: Based in our Enfield office with a hybrid working model, youll join the Global Customer Satisfaction department as a Technical Support Specialist. If youre passionate about providing outstanding customer support, building strong client relationships, and enjoy working in a fast-paced, technology-focused environment, this is the role for you! Were seeking a dedicated French-speaking Technical Support Specialist to assist customers using EBSCO software solutions and help ensure their success. * Troubleshoot and resolve product-related issues * Guide clients through installation, configuration, and upgrades * Monitor customer casework and ensure timely resolution * Conduct proactive service meetings and communicate updates * Advocate for customer needs across internal teams * Deliver internal training and maintain support documentation
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Related Jobs
Locations
- The City, City (EC3)
- The City, City (EC4)
- Ireland
- Southwark
- Campden Hill
- Canary Wharf
- Euston
- Frimley
- Kennington
- Mayfair
- City of London
- Cambridge
- Reading
- South East London
- Central London
- Milton Keynes
- West End
- South West London
- Abingdon
- East London
- London
- Berkshire
- Cambridgeshire
- Oxfordshire
- Buckinghamshire
- Surrey
- Hampshire
- Bedfordshire
- East Sussex
- Essex
- South East
- East Anglia