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19 Permanent API jobs in Bedfordshire + 20 miles
348 exact matches jobs are outside your preferred location
About us - At Xelix, we work with some of the worlds largest companies to automate and strengthen their financial controls. Our AI solutions redefine how Accounts Payable teams operate - moving from manual processes to automated, intelligent workflows. Xelix is a fast-paced scale-up - things move fast and expectations are high. We raised our Series B with Insight Partners in June 2025 and are expanding aggressively, whilst remaining profitable. We have over 100 talented people pulling together to achieve our goals. Everyone is trusted to take ownership, move fast and have a meaningful impact. We prioritise personal and professional growth, keep things fun & we love to celebrate a milestone together. In this role youll grow, be challenged and help shape the future of Xelix. If youre excited about building something special with us, wed love to hear from you. About the
About us - At Xelix, we work with some of the worlds largest companies to automate and strengthen their financial controls. Our AI solutions redefine how Accounts Payable teams operate - moving from manual processes to automated, intelligent workflows. Xelix is a fast-paced scale-up - things move fast and expectations are high. We raised our Series B with Insight Partners in June 2025 and are expanding aggressively, whilst remaining profitable. We have over 100 talented people pulling together to achieve our goals. Everyone is trusted to take ownership, move fast and have a meaningful impact. We prioritise personal and professional growth, keep things fun & we love to celebrate a milestone together. In this role youll grow, be challenged and help shape the future of Xelix. If youre excited about building something special with us, wed love to hear from you. About the
About The Role - Purpose - Reporting to the Head of Data Insight & Analytics, this role will support with the development and progression of 7IMs business intelligence and insight capability. Sitting within the Data & Analytics team, this role will directly support 7IMs Transformation function through building dashboards, insight tools and supporting key stakeholders, including the Chief Transformation Officer and the Transformation Leadership Group, with data-driven decision making. The role would suit an ambitious and driven junior individual who is looking for an opportunity to advance their understanding of data, working closely with business leaders to generate meaningful insight. Responsibilities * Over time, act as the subject matter expert (SME) for data analytics to 7IMs Transformation function.
About The Role - Purpose - Reporting to the Head of Data Insight & Analytics, this role will support with the development and progression of 7IMs business intelligence and insight capability. Sitting within the Data & Analytics team, this role will directly support 7IMs Transformation function through building dashboards, insight tools and supporting key stakeholders, including the Chief Transformation Officer and the Transformation Leadership Group, with data-driven decision making. The role would suit an ambitious and driven junior individual who is looking for an opportunity to advance their understanding of data, working closely with business leaders to generate meaningful insight. Responsibilities * Over time, act as the subject matter expert (SME) for data analytics to 7IMs Transformation function.
Ebury is a global fintech firm dedicated to empowering businesses to expand internationally through tailored and forward-thinking financial solutions. Since our founding in 2009, we've grown to a diverse team of over 1,700 professionals across 40+ offices and 29+ markets worldwide. Joining Ebury means becoming part of a collaborative and innovative environment where your contributions are valued. You'll play a key role in shaping the future of cross-border finance, while advancing your own career in a dynamic, high-growth industry. London Office - Hybrid: 4 days in the office, 1 day working from home - We are seeking a full-stack engineer to play a crucial part in our Compliance Operations team. In this role, you will be working on evolving our customer-facing portals for the scale Ebury wants to operate in by developing tooling and processes to empower Ebury product
Ebury is a global fintech firm dedicated to empowering businesses to expand internationally through tailored and forward-thinking financial solutions. Since our founding in 2009, we've grown to a diverse team of over 1,700 professionals across 40+ offices and 29+ markets worldwide. Joining Ebury means becoming part of a collaborative and innovative environment where your contributions are valued. You'll play a key role in shaping the future of cross-border finance, while advancing your own career in a dynamic, high-growth industry. London Office - Hybrid: 4 days in the office, 1 day working from home - We are seeking a full-stack engineer to play a crucial part in our Compliance Operations team. In this role, you will be working on evolving our customer-facing portals for the scale Ebury wants to operate in by developing tooling and processes to empower Ebury product
At Flexciton, we work with high-tech factories built with investments worth hundreds of millions of dollars, producing advanced chips at the atomic level. It can take up to nine months to fabricate these cutting-edge products. We are proud to be the only SaaS product in the world that plans and schedules production in high-tech semiconductor fabs, using complex algorithms in real-time, all from our London office. We generate more than 10,000 schedules daily to operate hundreds of multimillion-dollar semiconductor manufacturing equipment in photolithography, etching, metal deposition, and metrology. Our technology consistently delivers the best production schedules, and leading companies like Seagate trust Flexciton to run their production 24/7. With operations across the US, Europe, and expansion into Asia, we are on a path to realise our vision for the Autonomous Fac
At Flexciton, we work with high-tech factories built with investments worth hundreds of millions of dollars, producing advanced chips at the atomic level. It can take up to nine months to fabricate these cutting-edge products. We are proud to be the only SaaS product in the world that plans and schedules production in high-tech semiconductor fabs, using complex algorithms in real-time, all from our London office. We generate more than 10,000 schedules daily to operate hundreds of multimillion-dollar semiconductor manufacturing equipment in photolithography, etching, metal deposition, and metrology. Our technology consistently delivers the best production schedules, and leading companies like Seagate trust Flexciton to run their production 24/7. With operations across the US, Europe, and expansion into Asia, we are on a path to realise our vision for the Autonomous Fac
Built on meritocracy, our unique company culture rewards self-starters and those who are committed to doing what is best for our customers. Location: Hybrid - London - Package: Negotiable + Benefits - We are seeking a skilled and motivated Server-Side Developer to work on our Platform. It is a custom-built online quote, bind and formal documentation issuance platform, that also offers a range of analytics to assist with underwriting, portfolio analysis and product performance. You will be working on improving and maintaining our existing platform, however their will also be the opportunity to support work on our modernisation initiative; to rebuild the platform with a new microservices architecture. * Design, develop, and maintain efficient and scalable server-side applications and services. * Write clean, well-documented, and maintainable code using industry best pra
Built on meritocracy, our unique company culture rewards self-starters and those who are committed to doing what is best for our customers. Location: Hybrid - London - Package: Negotiable + Benefits - We are seeking a skilled and motivated Server-Side Developer to work on our Platform. It is a custom-built online quote, bind and formal documentation issuance platform, that also offers a range of analytics to assist with underwriting, portfolio analysis and product performance. You will be working on improving and maintaining our existing platform, however their will also be the opportunity to support work on our modernisation initiative; to rebuild the platform with a new microservices architecture. * Design, develop, and maintain efficient and scalable server-side applications and services. * Write clean, well-documented, and maintainable code using industry best pra
About us - Climate X is a purpose-driven technology company, backed by GV (Google Ventures), Western Technologies (early investors in Meta, Google, Palantir), Commerz Ventures, Pale Blue Dot, Deloitte, and other world-class investors. We're a wonderfully diverse, growing team with physical offices in London and New York City. Demand for Climate X is growing fast, and we need to build our team! You'll be at the front of a nascent industry, working as part of a fantastic and diverse team, doing things that you can be proud of. We're excited to have the opportunity to speak with you during this process. Our mission - To deepen the understanding of our changing planet and inspire meaningful action. What we do * We're helping the world become more resilient to the impacts of physical climate risks (including floods, fires, storms and more).
About us - Climate X is a purpose-driven technology company, backed by GV (Google Ventures), Western Technologies (early investors in Meta, Google, Palantir), Commerz Ventures, Pale Blue Dot, Deloitte, and other world-class investors. We're a wonderfully diverse, growing team with physical offices in London and New York City. Demand for Climate X is growing fast, and we need to build our team! You'll be at the front of a nascent industry, working as part of a fantastic and diverse team, doing things that you can be proud of. We're excited to have the opportunity to speak with you during this process. Our mission - To deepen the understanding of our changing planet and inspire meaningful action. What we do * We're helping the world become more resilient to the impacts of physical climate risks (including floods, fires, storms and more).
Software Engineer in Test at Red Badger, London/Remote, 6 Months+, £Competitive Rate (Outside IR35)
Software Engineer in Test at Red Badger, London/Remote, 6 Months+, £Competitive Rate (Outside IR35)
Red Badger
London
Competitive
1. Ideal start date Monday 1st September - 2. New platform build for blue-chip client Financial services client - 3. 6 months + 4. Outside IR35 - 5. £Competitive day rate - 6. 2 days in person working / week. 7. We're looking for high proficiency in Automation testing and designing and building a full suite of platform tests. 8. Immediate Interviews - Senior Software Engineer in Test (SET) The Role - We are looking for a Senior Software Engineer in Test (SET) to join Red Badger's high-performing engineering teams. In this role, you'll define and drive quality strategy for platform and infrastructure-level products from container orchestration and microservices to observability tooling and CI/CD pipelines. This is a hands-on engineering position within cross-functional teams where quality is everyone's responsibility but you'll lead the way in making it systematic, sca
1. Ideal start date Monday 1st September - 2. New platform build for blue-chip client Financial services client - 3. 6 months + 4. Outside IR35 - 5. £Competitive day rate - 6. 2 days in person working / week. 7. We're looking for high proficiency in Automation testing and designing and building a full suite of platform tests. 8. Immediate Interviews - Senior Software Engineer in Test (SET) The Role - We are looking for a Senior Software Engineer in Test (SET) to join Red Badger's high-performing engineering teams. In this role, you'll define and drive quality strategy for platform and infrastructure-level products from container orchestration and microservices to observability tooling and CI/CD pipelines. This is a hands-on engineering position within cross-functional teams where quality is everyone's responsibility but you'll lead the way in making it systematic, sca
About Lendable - Lendable is on a mission to make consumer finance amazing: faster, cheaper, and friendlier. * One of the UKs newest unicorns with a team of just over 600 people * Among the fastest-growing tech companies in the UK * Profitable since 2017 * Backed by top investors including Balderton Capital and Goldman Sachs * Loved by customers with the best reviews in the market (4.9 across 10,000s of reviews on Trustpilot) So far, weve rebuilt the Big Three consumer finance products from scratch: loans, credit cards and car finance . We get money into our customers hands in minutes instead of days. Were growing fast, and theres a lot more to do: were going after the two biggest Western markets (UK and US) where trillions worth of financial products are held by big banks with dated systems and painful processes. Join us if you want to * Take ownership across a broad
About Lendable - Lendable is on a mission to make consumer finance amazing: faster, cheaper, and friendlier. * One of the UKs newest unicorns with a team of just over 600 people * Among the fastest-growing tech companies in the UK * Profitable since 2017 * Backed by top investors including Balderton Capital and Goldman Sachs * Loved by customers with the best reviews in the market (4.9 across 10,000s of reviews on Trustpilot) So far, weve rebuilt the Big Three consumer finance products from scratch: loans, credit cards and car finance . We get money into our customers hands in minutes instead of days. Were growing fast, and theres a lot more to do: were going after the two biggest Western markets (UK and US) where trillions worth of financial products are held by big banks with dated systems and painful processes. Join us if you want to * Take ownership across a broad
Ensure consistency in user experience, API design, and operational processes across the capability.
Ensure consistency in user experience, API design, and operational processes across the capability.
Experience of RESTful API Design and authentication with OAUTH
Experience of RESTful API Design and authentication with OAUTH
Participate in the evolution and development of the REST API. * .NET, ASP.NET Core Web API
Participate in the evolution and development of the REST API. * .NET, ASP.NET Core Web API
You can design a RESTful API and list all the pros and cons of your design * You have an API-first product mindset: you care about customer outcomes and you like to listen to their use-cases before diving into code
You can design a RESTful API and list all the pros and cons of your design * You have an API-first product mindset: you care about customer outcomes and you like to listen to their use-cases before diving into code
Experience in consuming a RESTful API.
Experience in consuming a RESTful API.
Experience supporting end-to-end workflows for API-driven SaaS products with a global scale.
Experience supporting end-to-end workflows for API-driven SaaS products with a global scale.
We provide a search API used by thousands of customers in more than 100 countries. * Algolia API Clients (available in 11 languages)
We provide a search API used by thousands of customers in more than 100 countries. * Algolia API Clients (available in 11 languages)
Partner with Engineering for API-driven integrations and maintain data connectors to our dashboard. Our API-first platform provides fully automated validators, staking & DeFi protocols access, and comprehensive data and commission management.
Partner with Engineering for API-driven integrations and maintain data connectors to our dashboard. Our API-first platform provides fully automated validators, staking & DeFi protocols access, and comprehensive data and commission management.
Experience in providing integration solutions with SAP BTP capabilities - Integration Suite, API Management, Event Mesh, open connectors etc.
Experience in providing integration solutions with SAP BTP capabilities - Integration Suite, API Management, Event Mesh, open connectors etc.
Experience consuming RESTful API services * Experience writing RESTful API services, either in Javascript or TypeScript
Experience consuming RESTful API services * Experience writing RESTful API services, either in Javascript or TypeScript
Experience with RESTful API design and implementation.
Experience with RESTful API design and implementation.
Knowledge of RESTful API design and implementation.
Knowledge of RESTful API design and implementation.
We are now scaling up with applications designed for major meeting platforms, real-time communication channels, and a powerful Public API to extend our functionality to a broader set of applications.
We are now scaling up with applications designed for major meeting platforms, real-time communication channels, and a powerful Public API to extend our functionality to a broader set of applications.
AI-driven search to enable discoverability - leveraging the changing nature of SEO, and the impact of the change in mechanism away from index-based search to structured data/API-first web models and how AI and search agents (like ChatGPT or Perplexity) change how users find content
AI-driven search to enable discoverability - leveraging the changing nature of SEO, and the impact of the change in mechanism away from index-based search to structured data/API-first web models and how AI and search agents (like ChatGPT or Perplexity) change how users find content
You enjoy sweating the details of both user experience and API design.
You enjoy sweating the details of both user experience and API design.
Manager, Lead Research Scientist, Training Data (Foundational Research)
Manager, Lead Research Scientist, Training Data (Foundational Research)
Thomson Reuters
London
Competitive
Post-training techniques for planning, reasoning & complex workflows (e.g., Reasoning Models, LLMs + Knowledge Graphs, Test time compute, CoT pipelines, Tool use & API calling, etc.)
Post-training techniques for planning, reasoning & complex workflows (e.g., Reasoning Models, LLMs + Knowledge Graphs, Test time compute, CoT pipelines, Tool use & API calling, etc.)
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Mastercard Developers ( is the primary API platform for Mastercard partners to access a diverse range of payment, data, loyalty, and security APIs. The team is responsible for delivering an experience that ensures developers can quickly find the right API, assess its technical capabilities and integrate it into new and innovative solutions. Act as subject matter expert for Mastercard Developers API Platform and services to support customer integrations on occasion - Proven track record in API based products
Mastercard Developers ( is the primary API platform for Mastercard partners to access a diverse range of payment, data, loyalty, and security APIs. The team is responsible for delivering an experience that ensures developers can quickly find the right API, assess its technical capabilities and integrate it into new and innovative solutions. Act as subject matter expert for Mastercard Developers API Platform and services to support customer integrations on occasion - Proven track record in API based products
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