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63 Contract API jobs in Westminster + 20 miles
295 exact matches jobs are outside your preferred location
Full-Stack Integration : Experience bridging frontend and backend systems, including API design, data flow optimisation, and end-to-end feature development.
Full-Stack Integration : Experience bridging frontend and backend systems, including API design, data flow optimisation, and end-to-end feature development.
Our frontend stack includes multiple applications using React, Next.js and Storybook; using data from API services and a WordPress CMS.
Our frontend stack includes multiple applications using React, Next.js and Storybook; using data from API services and a WordPress CMS.
Document integration flows, including API specs, data mapping, and system interactions
Document integration flows, including API specs, data mapping, and system interactions
Experience in REST API, GraphQL / gRPCdesign and development.
Experience in REST API, GraphQL / gRPCdesign and development.
Experience with API testing.
Experience with API testing.
Conduct application security testing, including API and web service assessments.
Conduct application security testing, including API and web service assessments.
Familiarity with basic API requests will also be highly valuable.
Familiarity with basic API requests will also be highly valuable.
Provide maximal visibility to merchants on their historical and upcoming settlements through dashboards and API * Experience API products and/or within a broader FinTech company.
Provide maximal visibility to merchants on their historical and upcoming settlements through dashboards and API * Experience API products and/or within a broader FinTech company.
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 Strong understanding of APIs; experience in API usage is mandatory.
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 Strong understanding of APIs; experience in API usage is mandatory.
Ability to design and build end-to-end applications and API integrations.
Ability to design and build end-to-end applications and API integrations.
Resolve complex technical cases related to Airtable's API, SAML/SSO configuration, SCIM provisioning, advanced automations, scripting, and third-party integrations.
Resolve complex technical cases related to Airtable's API, SAML/SSO configuration, SCIM provisioning, advanced automations, scripting, and third-party integrations.
Ability to design and build end-to-end applications and API integrations.
Ability to design and build end-to-end applications and API integrations.
You can translate rulebooks or API specs into requirements
You can translate rulebooks or API specs into requirements
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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Our products include the Dune app for dashboards, the Analytics API, and Datashare.
Our products include the Dune app for dashboards, the Analytics API, and Datashare.
This includes the Dune app for dashboards, our Analytics API, and Datashare services offering onchain data across 100+ EVM/non-EVM chains. * Define positioning and messaging for Dunes analytics products, including the app, Analytics API, and Datashare, across EVM chains and major ecosystems and key datasets like dex.trades, prices.usd, and tokens.transfers.
This includes the Dune app for dashboards, our Analytics API, and Datashare services offering onchain data across 100+ EVM/non-EVM chains. * Define positioning and messaging for Dunes analytics products, including the app, Analytics API, and Datashare, across EVM chains and major ecosystems and key datasets like dex.trades, prices.usd, and tokens.transfers.
Typing is used within our Python stack to power automated documentation and API definitions * Have hands-on experience designing data flow through software, from persistent storage to API endpoints, while applying industry best practices for validation
Typing is used within our Python stack to power automated documentation and API definitions * Have hands-on experience designing data flow through software, from persistent storage to API endpoints, while applying industry best practices for validation
Implementation of Salesforce Flows to a high standard (e.g. screen flows, triggered flows, API flows)
Implementation of Salesforce Flows to a high standard (e.g. screen flows, triggered flows, API flows)
Experience writing effective unit and integration tests, including API mocks.
Experience writing effective unit and integration tests, including API mocks.
Hands-on experience with API integration projects , preferably using MuleSoft , and solid understanding of data contracts and end-to-end data flows in enterprise systems.
Hands-on experience with API integration projects , preferably using MuleSoft , and solid understanding of data contracts and end-to-end data flows in enterprise systems.
Mentor AI Application Engineers and other team members, guiding them on backend, API, and AI/ML integration patterns. * Strong knowledge of SaaS integrations and API development (REST, GraphQL).
Mentor AI Application Engineers and other team members, guiding them on backend, API, and AI/ML integration patterns. * Strong knowledge of SaaS integrations and API development (REST, GraphQL).
Design, develop, and execute automated test scripts on communication/API layers. * Extensive experience in developing coded API tests with PactumJS, SpecFlow, REST Assured or similar
Design, develop, and execute automated test scripts on communication/API layers. * Extensive experience in developing coded API tests with PactumJS, SpecFlow, REST Assured or similar
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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Composition: Enable business users and external systems to tailor and orchestrate Algolia results using a flexible API and UI.
Composition: Enable business users and external systems to tailor and orchestrate Algolia results using a flexible API and UI.
Leverage knowledge of data analysis, API documentation and payment processing manage, coach, and develop a team of hybrid L1 and L2 associates
Leverage knowledge of data analysis, API documentation and payment processing manage, coach, and develop a team of hybrid L1 and L2 associates
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