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28 Contract API jobs in City of London + 20 miles
165 exact matches jobs are outside your preferred location
The OpenPayd platform delivers a suite of banking and payments infrastructure: accounts in over 40 currencies, FX, on/off ramp, international and domestic payments, Open Banking services all via a single API. o Hands-on experience with APIs , including designing, integrating, and managing third-party or internal API solutions to support compliance and onboarding workflows
The OpenPayd platform delivers a suite of banking and payments infrastructure: accounts in over 40 currencies, FX, on/off ramp, international and domestic payments, Open Banking services all via a single API. o Hands-on experience with APIs , including designing, integrating, and managing third-party or internal API solutions to support compliance and onboarding workflows
Oversee integration of Radar API with ML Engineering.
Oversee integration of Radar API with ML Engineering.
Assist clients in seamless API integration, furnishing comprehensive documentation and hands-on support for smooth implementation. * Strong knowledge of API integration, RESTful APIs, and API troubleshooting.
Assist clients in seamless API integration, furnishing comprehensive documentation and hands-on support for smooth implementation. * Strong knowledge of API integration, RESTful APIs, and API troubleshooting.
Job Introduction - At SCS Railways, were delivering one of the most transformative rail projects in the UK and our IT team is at the heart of making it happen. We manage cloud-based and on-site services for over 2,000 users, ensuring seamless collaboration, secure data management, and cutting-edge digital solutions across our business. Were now looking for a Solutions Architect (Information Management) a technically skilled, forward-thinking professional who will play a leading role in developing and enhancing our information management systems. If youre passionate about modern cloud technologies, integration architecture, and building scalable, high-performance solutions, this is your opportunity to make a lasting impact. Working arrangements: This role will be based in the office for a minimum of 3 days per week. Main Responsibilities
Job Introduction - At SCS Railways, were delivering one of the most transformative rail projects in the UK and our IT team is at the heart of making it happen. We manage cloud-based and on-site services for over 2,000 users, ensuring seamless collaboration, secure data management, and cutting-edge digital solutions across our business. Were now looking for a Solutions Architect (Information Management) a technically skilled, forward-thinking professional who will play a leading role in developing and enhancing our information management systems. If youre passionate about modern cloud technologies, integration architecture, and building scalable, high-performance solutions, this is your opportunity to make a lasting impact. Working arrangements: This role will be based in the office for a minimum of 3 days per week. Main Responsibilities
Familiarity with zero-trust architectures, hybrid cloud security, and API security
Familiarity with zero-trust architectures, hybrid cloud security, and API security
We are building the first European Investment API that empowers businesses to offer seamless investment experiences to their users. We are looking for a full-time Head of Engineering to help us build a securities API for financial institutions, the first API of that kind in Europe. These teams are responsible for critical domains such as Orders, Trading Partner integrations, Position, and Wealth Management, all of which are essential for Upvests Investment API. The Brokerage Tribe plays a crucial role in the Investment API Platform, overseeing a wide range of user journey aspects. * Assume ownership of business-critical components within the Investment API, influencing its roadmap and delivering strategic impact to establish Upvest as a reliable partner. * Experience
We are building the first European Investment API that empowers businesses to offer seamless investment experiences to their users. We are looking for a full-time Head of Engineering to help us build a securities API for financial institutions, the first API of that kind in Europe. These teams are responsible for critical domains such as Orders, Trading Partner integrations, Position, and Wealth Management, all of which are essential for Upvests Investment API. The Brokerage Tribe plays a crucial role in the Investment API Platform, overseeing a wide range of user journey aspects. * Assume ownership of business-critical components within the Investment API, influencing its roadmap and delivering strategic impact to establish Upvest as a reliable partner. * Experience
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Bring thoughtful design practices to API development including versioning, authentication, and security * Have strong opinions on effective API design and data structure, but are open to evolving them * A solid understanding of API design principles including auth, scalability and security
Bring thoughtful design practices to API development including versioning, authentication, and security * Have strong opinions on effective API design and data structure, but are open to evolving them * A solid understanding of API design principles including auth, scalability and security
Role Sr. Technology Architect - Technology Data Modelling, ERWIN Modelling, Azure Architect, PySpark - Location UK(London) Job Description - Data Architect should have key understanding of building Data Models, Experience in Data Architecting and Engineering space on Spark, Pyspark, ADF, Azure Synapse and Data Lake. Your role - In the role of a Sr Technology Architect, you will primarily be responsible for identifying best-fit architectural solutions for one or more projects; develop design of application, provide regular support/guidance to project teams on complex coding, issue resolution and execution - As a thought and solution leader, you will be the key advisor to architecture and design reviews. You will anchor business pursuit initiatives, client discussions, in-house capability building. You will have the opportunity to shape value-adding solutions that enabl
Role Sr. Technology Architect - Technology Data Modelling, ERWIN Modelling, Azure Architect, PySpark - Location UK(London) Job Description - Data Architect should have key understanding of building Data Models, Experience in Data Architecting and Engineering space on Spark, Pyspark, ADF, Azure Synapse and Data Lake. Your role - In the role of a Sr Technology Architect, you will primarily be responsible for identifying best-fit architectural solutions for one or more projects; develop design of application, provide regular support/guidance to project teams on complex coding, issue resolution and execution - As a thought and solution leader, you will be the key advisor to architecture and design reviews. You will anchor business pursuit initiatives, client discussions, in-house capability building. You will have the opportunity to shape value-adding solutions that enabl
API & Integration Development Build secure, scalable APIs to connect EnvisionOS with platforms like ServiceNow, Snowflake, and monitoring systems. * Proven experience with API development (REST, GraphQL) and frameworks like Flask, FastAPI, or Spring.
API & Integration Development Build secure, scalable APIs to connect EnvisionOS with platforms like ServiceNow, Snowflake, and monitoring systems. * Proven experience with API development (REST, GraphQL) and frameworks like Flask, FastAPI, or Spring.
Join the API Revolution at Gravitee - Where Innovation Meets Growth - Since our beginnings in 2015, Gravitee has grown into a global force, recognised as a Gartner Magic Quadrant Leader for API Management in 2024 and 2025! What started with four developers challenging the complexities of APIs has evolved into a revolutionary platform powering API and event stream ecosystems worldwide. Be part of a team thats redefining whats possible in API management, and shaping the future of digital transformation. Gravitee.io is taking APIs to the next level, we are the premier, open-source API platform and we want everyone to know how amazing our software is. * API Integration & Development: Leverage REST APIs to connect disparate systems, troubleshoot integration issues, and ens
Join the API Revolution at Gravitee - Where Innovation Meets Growth - Since our beginnings in 2015, Gravitee has grown into a global force, recognised as a Gartner Magic Quadrant Leader for API Management in 2024 and 2025! What started with four developers challenging the complexities of APIs has evolved into a revolutionary platform powering API and event stream ecosystems worldwide. Be part of a team thats redefining whats possible in API management, and shaping the future of digital transformation. Gravitee.io is taking APIs to the next level, we are the premier, open-source API platform and we want everyone to know how amazing our software is. * API Integration & Development: Leverage REST APIs to connect disparate systems, troubleshoot integration issues, and ens
Documenting product designs, data flows and API specs, and maintaining backlog in Jira or similar tools
Documenting product designs, data flows and API specs, and maintaining backlog in Jira or similar tools
You will lead the technical vision for our core developer productsincluding our API, Eventing, Lambdas, and Marketplace. * Guide the evolution of our external API framework, ensuring it remains robust, consistent, and easy to use as our product capabilities expand.
You will lead the technical vision for our core developer productsincluding our API, Eventing, Lambdas, and Marketplace. * Guide the evolution of our external API framework, ensuring it remains robust, consistent, and easy to use as our product capabilities expand.
Proven experience leading cross-functional squads to deliver complex, high-impact initiatives in backend, API, or systems-focused domains. * Familiarity with API design and systems architecture.
Proven experience leading cross-functional squads to deliver complex, high-impact initiatives in backend, API, or systems-focused domains. * Familiarity with API design and systems architecture.
Proven track record leading cross-functional squads to deliver complex, transformation initiatives in backend, API, and systems-focused domains.
Proven track record leading cross-functional squads to deliver complex, transformation initiatives in backend, API, and systems-focused domains.
This role is pivotal in connecting our core developer products (API, Eventing, Lambdas, Marketplace) to the company's next-generation AI and data platforms. * Establish and champion the technical vision and architectural governance for our external API framework, ensuring consistency, scalability, and a world-class developer experience across all of Samsara's product lines.
This role is pivotal in connecting our core developer products (API, Eventing, Lambdas, Marketplace) to the company's next-generation AI and data platforms. * Establish and champion the technical vision and architectural governance for our external API framework, ensuring consistency, scalability, and a world-class developer experience across all of Samsara's product lines.
Experience with supplier audits, quality systems (e.g., ISO 9001, API Specification Q1), and managing supplier relationships is highly valued.
Experience with supplier audits, quality systems (e.g., ISO 9001, API Specification Q1), and managing supplier relationships is highly valued.
AWS API Gateway
AWS API Gateway
Must have experience with .NET and C#, SDLC (Software Development Life Cycle), Database (SQL, Azure Data Store) and API/REST
Must have experience with .NET and C#, SDLC (Software Development Life Cycle), Database (SQL, Azure Data Store) and API/REST
To be right for this role, you should have extensive mobile and API automation experience and the ability to self-serve by building the tooling required to support your automation efforts. * Lead an automation team to build pipelines and tooling for mobile app automation, e2e testing suites, and API testing
To be right for this role, you should have extensive mobile and API automation experience and the ability to self-serve by building the tooling required to support your automation efforts. * Lead an automation team to build pipelines and tooling for mobile app automation, e2e testing suites, and API testing
Capable of diagnosing and resolving tracking, data, and audience issues, including pixel implementation, UTM structure, and conversion API setup.
Capable of diagnosing and resolving tracking, data, and audience issues, including pixel implementation, UTM structure, and conversion API setup.
Continuously enhance technical credibility by staying current on cloud, API, and financial-tech ecosystem trends. * Hands-on experience with API-based integrations (REST/JSON, XML, message queues, event-driven systems).
Continuously enhance technical credibility by staying current on cloud, API, and financial-tech ecosystem trends. * Hands-on experience with API-based integrations (REST/JSON, XML, message queues, event-driven systems).
Manage API/Feed demos, trials, and existing client relationships, ensuring high levels of customer satisfaction. Support sales efforts by delivering effective client presentations, conducting demos using Data Services products (API, Feeds, Snowflake, etc.), communicating our value proposition, providing quotes, and defining licensing/contract terms.
Manage API/Feed demos, trials, and existing client relationships, ensuring high levels of customer satisfaction. Support sales efforts by delivering effective client presentations, conducting demos using Data Services products (API, Feeds, Snowflake, etc.), communicating our value proposition, providing quotes, and defining licensing/contract terms.
Location London - Nine Elms - Type: Full-time - Department: Technology - Job Summary * To assist in the ongoing work relating to the integration and updates between Iterable (CRM) and WordPress (Headless and monolithic) * Work across the full stack, building highly scalable distributed solutions that enable positive user experiences and measurable business growth * Assist in formulating effective, responsive designs and turning them into working Gutenberg blocks and front-end components * Designing and implementing new features and functionality * Ensuring high-performance and availability, and managing all technical aspects of the CMS (WordPress) * Contributing to best practices relating to site builds, application security, regular patching and coding standards. Responsibilities * Assist with the implementation of new features and updates to the new email marketing
Location London - Nine Elms - Type: Full-time - Department: Technology - Job Summary * To assist in the ongoing work relating to the integration and updates between Iterable (CRM) and WordPress (Headless and monolithic) * Work across the full stack, building highly scalable distributed solutions that enable positive user experiences and measurable business growth * Assist in formulating effective, responsive designs and turning them into working Gutenberg blocks and front-end components * Designing and implementing new features and functionality * Ensuring high-performance and availability, and managing all technical aspects of the CMS (WordPress) * Contributing to best practices relating to site builds, application security, regular patching and coding standards. Responsibilities * Assist with the implementation of new features and updates to the new email marketing
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As an AI Backend Services Engineer at Labster, you will be instrumental in building robust backend services that leverage AI capabilities (particularly LLM APIs) to enhance personalized adaptive tutoring in immersive learning experiences. You'll play a pivotal role in designing, implementing, and scaling services that integrate with AI providers and automation tools to deliver educational content effectively, contributing significantly to Labster's mission to empower 100 million students globally with personal AI tutors that dramatically advance equal access to high-quality science and healthcare education. If youre passionate about working for a mission-driven organization and making a tangible difference in the world through education and healthcare innovation, please read on and apply! Responsibilities
As an AI Backend Services Engineer at Labster, you will be instrumental in building robust backend services that leverage AI capabilities (particularly LLM APIs) to enhance personalized adaptive tutoring in immersive learning experiences. You'll play a pivotal role in designing, implementing, and scaling services that integrate with AI providers and automation tools to deliver educational content effectively, contributing significantly to Labster's mission to empower 100 million students globally with personal AI tutors that dramatically advance equal access to high-quality science and healthcare education. If youre passionate about working for a mission-driven organization and making a tangible difference in the world through education and healthcare innovation, please read on and apply! Responsibilities
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Location - London - Employment Type - Full time - Department - Product R&D - About G2 - The Company - When you join G2, youre joining the team that helps businesses reach their peak potential by powering decisions and strategies with trusted insights from real software users. G2 is the world's largest and most trusted software marketplace. More than 100 million people annually including employees at all Fortune 500 companies use G2 to make smarter software decisions based on authentic peer reviews. Thousands of software and services companies of all sizes partner with G2 to build their reputation and grow their business including Salesforce, HubSpot, Zoom, and Adobe. To learn more about where you go for software, visit and follow us on LinkedIn. As we continue on our growth journey, we are striving to be the most trusted data source in the age of AI for informing soft
Location - London - Employment Type - Full time - Department - Product R&D - About G2 - The Company - When you join G2, youre joining the team that helps businesses reach their peak potential by powering decisions and strategies with trusted insights from real software users. G2 is the world's largest and most trusted software marketplace. More than 100 million people annually including employees at all Fortune 500 companies use G2 to make smarter software decisions based on authentic peer reviews. Thousands of software and services companies of all sizes partner with G2 to build their reputation and grow their business including Salesforce, HubSpot, Zoom, and Adobe. To learn more about where you go for software, visit and follow us on LinkedIn. As we continue on our growth journey, we are striving to be the most trusted data source in the age of AI for informing soft
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