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14 API jobs in Petersfield + 20 miles
396 exact matches jobs are outside your preferred location
Our client is a pre-seed, London-based startup building a universal financial intelligence layer for the healthcare industry. With $2M in funding from top-tier VCs, they're tackling a massive, untapped market: providing financial visibility to the dental industry, which currently lacks the tools to unify fragmented data across various systems. They've already found product-market fit and are poised for rapid growth. This is a unique opportunity to join a small, early-stage team and help build the foundation of a global platform. Our client is looking for a Software Engineer to work directly with the CTO and own problems from end-to-end. This is a hands-on role for a product-minded engineer who is dedicated to building scalable and durable systems. You will be instrumental in developing the core product, which will include building payment workflows, integrations, and
Our client is a pre-seed, London-based startup building a universal financial intelligence layer for the healthcare industry. With $2M in funding from top-tier VCs, they're tackling a massive, untapped market: providing financial visibility to the dental industry, which currently lacks the tools to unify fragmented data across various systems. They've already found product-market fit and are poised for rapid growth. This is a unique opportunity to join a small, early-stage team and help build the foundation of a global platform. Our client is looking for a Software Engineer to work directly with the CTO and own problems from end-to-end. This is a hands-on role for a product-minded engineer who is dedicated to building scalable and durable systems. You will be instrumental in developing the core product, which will include building payment workflows, integrations, and
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
At Wayve we're committed to creating a diverse, fair and respectful culture that is inclusive of everyone based on their unique skills and perspectives, and regardless of sex, race, religion or belief, ethnic or national origin, disability, age, citizenship, marital, domestic or civil partnership status, sexual orientation, gender identity, veteran status, pregnancy or related condition (including breastfeeding) or any other basis as protected by applicable law. About us - Founded in 2017, Wayve is the leading developer of Embodied AI technology. Our advanced AI software and foundation models enable vehicles to perceive, understand, and navigate any complex environment, enhancing the usability and safety of automated driving systems. Our vision is to create autonomy that propels the world forward.
At Wayve we're committed to creating a diverse, fair and respectful culture that is inclusive of everyone based on their unique skills and perspectives, and regardless of sex, race, religion or belief, ethnic or national origin, disability, age, citizenship, marital, domestic or civil partnership status, sexual orientation, gender identity, veteran status, pregnancy or related condition (including breastfeeding) or any other basis as protected by applicable law. About us - Founded in 2017, Wayve is the leading developer of Embodied AI technology. Our advanced AI software and foundation models enable vehicles to perceive, understand, and navigate any complex environment, enhancing the usability and safety of automated driving systems. Our vision is to create autonomy that propels the world forward.
Optional knowledge of REST API and SWAGGER HubXCT eg SWIFT MTMX Cross Border will be an asset
Optional knowledge of REST API and SWAGGER HubXCT eg SWIFT MTMX Cross Border will be an asset
Introduce new product offerings such as exotic currencies and API products * Extensive development skills and experience with Java, Spring, Hibernate, Open API, Log4J, etc.
Introduce new product offerings such as exotic currencies and API products * Extensive development skills and experience with Java, Spring, Hibernate, Open API, Log4J, etc.
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At least 2 years as an SA or at least 4 years in a similar customer-facing role, for example as a technical consultant, solution engineer or implementation engineer at an API-first (REST, GraphQL) SaaS company.
At least 2 years as an SA or at least 4 years in a similar customer-facing role, for example as a technical consultant, solution engineer or implementation engineer at an API-first (REST, GraphQL) SaaS company.
At least 2 years as an SA or at least 4 years in a similar customer-facing role, for example as a technical consultant, solution engineer or implementation engineer at an API-first (REST, GraphQL) SaaS company.
At least 2 years as an SA or at least 4 years in a similar customer-facing role, for example as a technical consultant, solution engineer or implementation engineer at an API-first (REST, GraphQL) SaaS 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.
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.
Automate API testing using tools such as Postman, RestAssured, or equivalent . * RestAssured (BDD), Postman (for API testing).
Automate API testing using tools such as Postman, RestAssured, or equivalent . * RestAssured (BDD), Postman (for API testing).
Familiarity with API testing and integration diagnostics
Familiarity with API testing and integration diagnostics
Restful API Services experience
Restful API Services experience
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A strong technical acumen and familiarity working with Jira, REST API, JSON, SAML SSO, and Azure DevOps
A strong technical acumen and familiarity working with Jira, REST API, JSON, SAML SSO, and Azure DevOps
Guide teams in the adoption of best practices in API design, modularity, cloud-native patterns, and event-driven systems
Guide teams in the adoption of best practices in API design, modularity, cloud-native patterns, and event-driven systems
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Strong proficiency in Java (preferably Java 17+), Spring Boot, and RESTful API development
Strong proficiency in Java (preferably Java 17+), Spring Boot, and RESTful API development
Experience with ARTIQ systems, or controlling hardware via python API.
Experience with ARTIQ systems, or controlling hardware via python API.
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API Testing: Ability to test APIs using tools like Postman or Swagger.
API Testing: Ability to test APIs using tools like Postman or Swagger.
Uphold high standards for our uptime and latency requirements while not sacrificing the veracity of API responses
Uphold high standards for our uptime and latency requirements while not sacrificing the veracity of API responses
Experience in API design, integration, and management for building systems interoperability, including RESTful services, GraphQL, and real-time data streaming protocols.
Experience in API design, integration, and management for building systems interoperability, including RESTful services, GraphQL, and real-time data streaming protocols.
Test automation following Test Driven Development practices including unit testing, API testing, and end-to-end testing
Test automation following Test Driven Development practices including unit testing, API testing, and end-to-end testing
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.
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10+ years of professional software engineering experience with expertise in JavaScript, TypeScript, Node.js, and RESTful API design.
10+ years of professional software engineering experience with expertise in JavaScript, TypeScript, Node.js, and RESTful API design.
Were primarily in AWS , utilising Lambda, ECS, SQS, API Gateway among others.
Were primarily in AWS , utilising Lambda, ECS, SQS, API Gateway among others.
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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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Technical knowledge and experience in producing testable, scalable, reusable and resilient services to provide API services to front end systems.
Technical knowledge and experience in producing testable, scalable, reusable and resilient services to provide API services to front end systems.
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Support the Developer & API team in the creation of targeted messaging and marketing strategies to influence awareness and adoption of Mastercard products among developers as part of the buying committee.
Support the Developer & API team in the creation of targeted messaging and marketing strategies to influence awareness and adoption of Mastercard products among developers as part of the buying committee.
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Related Jobs
Locations
- Fivensgreen
- Lambeth
- Maida Hill
- Pimlico
- Soho
- South Kensington
- Southwark
- Thames View Industrial Park
- Victoria
- Central London
- West End
- Reading
- City of London
- North West London
- Windsor
- Fareham
- Southampton
- West London
- South West London
- London
- Berkshire
- Hampshire
- West Sussex
- Surrey
- Oxfordshire
- East Sussex
- Hertfordshire
- South East