Date posted
Commute time
Locations
Type of Company
Job types
Salaries
Locations
Locations
Salaries
Date posted
Type of Company
Job types
Locations
47 Contract API jobs in Sunbury-On-Thames + 20 miles
173 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
Position: Full Stack Developer - AI Team (Global Digital) Location: London, United Kingdom **# of Openings:** 1 - About Populous - For more than 40 years Populous has had a singular focus - to draw people together around the things that they love, to be the leading design firm that specialises in places, spaces and events where people gather. Our success is defined by designing projects that are seen as the benchmark. We are committed to future innovation, anticipating and shaping the future of our industries. Our team is made up of highly talented people with a range of skills, all integral to successfully bringing to life the places and experiences we design. As our company has grown, our expertise has expanded to encompass a wide variety of disciplines - including architecture, audiovisual consultancy, brand activation, design & build, events, food & beverage strat
Position: Full Stack Developer - AI Team (Global Digital) Location: London, United Kingdom **# of Openings:** 1 - About Populous - For more than 40 years Populous has had a singular focus - to draw people together around the things that they love, to be the leading design firm that specialises in places, spaces and events where people gather. Our success is defined by designing projects that are seen as the benchmark. We are committed to future innovation, anticipating and shaping the future of our industries. Our team is made up of highly talented people with a range of skills, all integral to successfully bringing to life the places and experiences we design. As our company has grown, our expertise has expanded to encompass a wide variety of disciplines - including architecture, audiovisual consultancy, brand activation, design & build, events, food & beverage strat
Position: Machine Learning Engineer - AI Team (Global Digital) Location: London, United Kingdom **# of Openings:** 1 - About Populous - For more than 40 years Populous has had a singular focus - to draw people together around the things that they love, to be the leading design firm that specialises in places, spaces and events where people gather. Our success is defined by designing projects that are seen as the benchmark. We are committed to future innovation, anticipating and shaping the future of our industries. Our team is made up of highly talented people with a range of skills, all integral to successfully bringing to life the places and experiences we design. As our company has grown, our expertise has expanded to encompass a wide variety of disciplines - including architecture, audiovisual consultancy, brand activation, design & build, events, food & beverage
Position: Machine Learning Engineer - AI Team (Global Digital) Location: London, United Kingdom **# of Openings:** 1 - About Populous - For more than 40 years Populous has had a singular focus - to draw people together around the things that they love, to be the leading design firm that specialises in places, spaces and events where people gather. Our success is defined by designing projects that are seen as the benchmark. We are committed to future innovation, anticipating and shaping the future of our industries. Our team is made up of highly talented people with a range of skills, all integral to successfully bringing to life the places and experiences we design. As our company has grown, our expertise has expanded to encompass a wide variety of disciplines - including architecture, audiovisual consultancy, brand activation, design & build, events, food & beverage
Who we are - Hi, Im Sheamus, the Senior Tech Lead at Mention Me and Im hiring! At Mention Me, we pride ourselves in providing end-end acquisition solutions to our customers through our leading AI-powered referral marketing solution and our AI-first micro influencer solution. Backed by Octopus Ventures and Eight Roads, weve raised $32 million in funding since 2018. Since 2013, our award-winning acquisition platform has driven over 9 million new customers, generating $3 billion in incremental revenue for our clients. Theres a good chance youve already come across us while online shopping from ASOS, PUMA, Gymshark, Charlotte Tilbury, or any other of the 500+ global brands we work with. Becoming a Mentioneer means youll be joining a driven team, with big plans, at a genuinely exciting time for our business. The role
Who we are - Hi, Im Sheamus, the Senior Tech Lead at Mention Me and Im hiring! At Mention Me, we pride ourselves in providing end-end acquisition solutions to our customers through our leading AI-powered referral marketing solution and our AI-first micro influencer solution. Backed by Octopus Ventures and Eight Roads, weve raised $32 million in funding since 2018. Since 2013, our award-winning acquisition platform has driven over 9 million new customers, generating $3 billion in incremental revenue for our clients. Theres a good chance youve already come across us while online shopping from ASOS, PUMA, Gymshark, Charlotte Tilbury, or any other of the 500+ global brands we work with. Becoming a Mentioneer means youll be joining a driven team, with big plans, at a genuinely exciting time for our business. The role
At Barings, we are as invested in our associates as we are in our clients. We recognize those who work diligently for us and reward them for personal and professional integrity, communication skills, distinct competencies and expertise in specific strategies, ability to collaborate as a team member and true dedication to the interests of our clients. We thank you for your interest in joining the Barings team, and invite you to explore our current employment opportunities. Job Title Title: Cyber Operations - Threat Intelligence Specialist Department: Information Security Location: London, UK Barings is a leading global financial services firm dedicated to meeting the evolving investment and capital needs of our clients and customers. Through active asset management and direct origination, we provide innovative solutions and access to differentiated opportunities across
At Barings, we are as invested in our associates as we are in our clients. We recognize those who work diligently for us and reward them for personal and professional integrity, communication skills, distinct competencies and expertise in specific strategies, ability to collaborate as a team member and true dedication to the interests of our clients. We thank you for your interest in joining the Barings team, and invite you to explore our current employment opportunities. Job Title Title: Cyber Operations - Threat Intelligence Specialist Department: Information Security Location: London, UK Barings is a leading global financial services firm dedicated to meeting the evolving investment and capital needs of our clients and customers. Through active asset management and direct origination, we provide innovative solutions and access to differentiated opportunities across
Be Part of Something Real - A close-knit team with big ideas. A passion for solving complex data challenges. A leading technology company specialising in data intelligence, AI and geospatial solutions. At Envitia, we are building something special. Were thrilled to announce that Envitia has been named one of the Sunday Times Top 100 Medium-Sized Companies to Work For in 2025 a prestigious recognition that highlights our commitment to creating an outstanding workplace where innovation, collaboration, and personal growth thrive. By using the power of data to tackle real-world challenges, our teams empower organisations to make smarter, data-driven decisions. Were small enough that your ideas get heard, your impact gets noticed and your growth actually matters to us. You wont get lost in the crowd; youll shape where we go next.
Be Part of Something Real - A close-knit team with big ideas. A passion for solving complex data challenges. A leading technology company specialising in data intelligence, AI and geospatial solutions. At Envitia, we are building something special. Were thrilled to announce that Envitia has been named one of the Sunday Times Top 100 Medium-Sized Companies to Work For in 2025 a prestigious recognition that highlights our commitment to creating an outstanding workplace where innovation, collaboration, and personal growth thrive. By using the power of data to tackle real-world challenges, our teams empower organisations to make smarter, data-driven decisions. Were small enough that your ideas get heard, your impact gets noticed and your growth actually matters to us. You wont get lost in the crowd; youll shape where we go next.
Who we are - For over 50 years, we have worked closely with investment and asset managers to become the worlds global provider of integrated investment management solutions. We are 2,800+ colleagues with a broad range of nationalities, educations, professional experiences, ages, and backgrounds in general. SimCorp is an independent subsidiary of the Deutsche Brse Group. Following the recent merger with Axioma, we leverage the combined strength of our brands to provide an industry-leading, full, front-to-back offering for our clients, with SimCorp as the overarching company brand and Axioma as a key product brand. SimCorp is an equal-opportunity employer. We are committed to building a culture where diverse perspectives and expertise are integrated in our everyday work. We believe in the continual growth and development of our employees, so that we can provide best-in-
Who we are - For over 50 years, we have worked closely with investment and asset managers to become the worlds global provider of integrated investment management solutions. We are 2,800+ colleagues with a broad range of nationalities, educations, professional experiences, ages, and backgrounds in general. SimCorp is an independent subsidiary of the Deutsche Brse Group. Following the recent merger with Axioma, we leverage the combined strength of our brands to provide an industry-leading, full, front-to-back offering for our clients, with SimCorp as the overarching company brand and Axioma as a key product brand. SimCorp is an equal-opportunity employer. We are committed to building a culture where diverse perspectives and expertise are integrated in our everyday work. We believe in the continual growth and development of our employees, so that we can provide best-in-
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. Senior Fullstack Engineer - London Office - Hybrid: 4 days in the office, 1 day working from home - We're looking for a Senior Fullstack Engineer to join our new, rapidly growing Cards team. In this role, you'll work on innovative fintech products, helping to solve customer problems by leveraging data and an entrepreneurial spirit.
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. Senior Fullstack Engineer - London Office - Hybrid: 4 days in the office, 1 day working from home - We're looking for a Senior Fullstack Engineer to join our new, rapidly growing Cards team. In this role, you'll work on innovative fintech products, helping to solve customer problems by leveraging data and an entrepreneurial spirit.
Legal Content AI Engineer
Legal Content AI Engineer
LEXISNEXIS RISK SOLUTIONS UK LIMITED T/a LexisNexis Risk Solutions Group
London
Competitive
Are you curious about emerging technologies in AI and automation in legal content? Do you have exposure to coding and Python? About our Team - LexisNexis Legal & Professional, which serves customers in more than 150 countries with 11,800 employees worldwide, is part of RELX, a global provider of information-based analytics and decision tools for professional and business customers. Our company has been a long-time leader in deploying AI and advanced technologies to the legal market to improve productivity and transform the overall business and practice of law, deploying ethical and powerful generative AI solutions with a flexible, multi-model approach that prioritises using the best model from todays top model creators for each individual legal use case. We are looking for a creative and collaborative AI Developer to lead the design and delivery of internal AI tools t
Are you curious about emerging technologies in AI and automation in legal content? Do you have exposure to coding and Python? About our Team - LexisNexis Legal & Professional, which serves customers in more than 150 countries with 11,800 employees worldwide, is part of RELX, a global provider of information-based analytics and decision tools for professional and business customers. Our company has been a long-time leader in deploying AI and advanced technologies to the legal market to improve productivity and transform the overall business and practice of law, deploying ethical and powerful generative AI solutions with a flexible, multi-model approach that prioritises using the best model from todays top model creators for each individual legal use case. We are looking for a creative and collaborative AI Developer to lead the design and delivery of internal AI tools t
At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you're a close but not exact match with the description, we hope you'll still consider applying. Want to learn more about life at Klaviyo? At Klaviyo, we believe the future of software lies not in productivity tools for human users but in software that can run and optimize itself based on outcome or reward metrics. We've built the infrastructure and application that serve as the interface between businesses and consumers. We now have over 167,000 customers, billions of consumer profiles, and hundreds of billions of customer messages and follow-on conversion data.
At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you're a close but not exact match with the description, we hope you'll still consider applying. Want to learn more about life at Klaviyo? At Klaviyo, we believe the future of software lies not in productivity tools for human users but in software that can run and optimize itself based on outcome or reward metrics. We've built the infrastructure and application that serve as the interface between businesses and consumers. We now have over 167,000 customers, billions of consumer profiles, and hundreds of billions of customer messages and follow-on conversion data.
At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you're a close but not exact match with the description, we hope you'll still consider applying. Want to learn more about life at Klaviyo? Lead Software AI Engineer - At Klaviyo, we believe the future of software lies not in productivity tools for human users but in software that can run and optimize itself based on outcome or reward metrics. We've built the infrastructure and application that serve as the interface between businesses and consumers. We now have over 167,000 customers, billions of consumer profiles, and hundreds of billions of customer messages and fol
At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you're a close but not exact match with the description, we hope you'll still consider applying. Want to learn more about life at Klaviyo? Lead Software AI Engineer - At Klaviyo, we believe the future of software lies not in productivity tools for human users but in software that can run and optimize itself based on outcome or reward metrics. We've built the infrastructure and application that serve as the interface between businesses and consumers. We now have over 167,000 customers, billions of consumer profiles, and hundreds of billions of customer messages and fol
Hands-on .NET experience, including C# and ASP.NET WEB API.
Hands-on .NET experience, including C# and ASP.NET WEB API.
Experience of RESTful API design
Experience of RESTful API design
Understanding and/or experience in managing API-based software businesses
Understanding and/or experience in managing API-based software businesses
Design and manage secure networking and service meshes (TLS, Istio, Linkerd, API gateways) to ensure encrypted and reliable service-to-service communication. * Experience designing and managing secure networking and service mesh (TLS, Istio, Linkerd, API gateways).
Design and manage secure networking and service meshes (TLS, Istio, Linkerd, API gateways) to ensure encrypted and reliable service-to-service communication. * Experience designing and managing secure networking and service mesh (TLS, Istio, Linkerd, API gateways).
You possess a strong understanding of cloud computing, microservices, API design, and event-driven architectures.
You possess a strong understanding of cloud computing, microservices, API design, and event-driven architectures.
NEW
Provides advanced knowledge of API development, API management, and implementation strategies to enhance scalability and system efficiency.
Provides advanced knowledge of API development, API management, and implementation strategies to enhance scalability and system efficiency.
NEW
Designed robust data architectures with a strong grasp of distributed systems, API development, and the patterns that make complex data processing reliable and maintainable.
Designed robust data architectures with a strong grasp of distributed systems, API development, and the patterns that make complex data processing reliable and maintainable.
)
Howdens Joinery are looking for a new Solutions Architect with expert experience in API and Microservices to join our Digital & Trade Architecture team based in either our office in Raunds, Northamptonshire or Croxley Park, Watford with some home working.
Howdens Joinery are looking for a new Solutions Architect with expert experience in API and Microservices to join our Digital & Trade Architecture team based in either our office in Raunds, Northamptonshire or Croxley Park, Watford with some home working.
NEW
)
Strong background in API development, cloud adoption frameworks, and modern architectures.
Strong background in API development, cloud adoption frameworks, and modern architectures.
NEW
Strong background in API development, cloud adoption frameworks, and modern architectures.
Strong background in API development, cloud adoption frameworks, and modern architectures.
NEW
)
Shopify Technical Lead/ Tech Lead/ Principle developer/ Shopify/ Remote * Title: Shopify Tech Lead * Domain: Agency, Shopify * Salary: up to £70k * Location: UK (remote) * Tech: Shopify, Shopify Plus, Liquid, APIs, JavaScript, HTML, Vite - We're looking for a Shopify Technical Lead to drive technical excellence, lead development teams, and deliver world-class Shopify solutions. You'll architect scalable systems, oversee code quality, mentor developers, and collaborate with stakeholders to ensure projects succeed. * Lead Shopify web/app development projects from design to delivery * Provide technical leadership, code reviews, and mentorship * Ensure best practices in CI/CD, performance, and accessibility * Collaborate with clients, PMs, and BAs to align on goals * Support and inspire your team to grow professionally
Shopify Technical Lead/ Tech Lead/ Principle developer/ Shopify/ Remote * Title: Shopify Tech Lead * Domain: Agency, Shopify * Salary: up to £70k * Location: UK (remote) * Tech: Shopify, Shopify Plus, Liquid, APIs, JavaScript, HTML, Vite - We're looking for a Shopify Technical Lead to drive technical excellence, lead development teams, and deliver world-class Shopify solutions. You'll architect scalable systems, oversee code quality, mentor developers, and collaborate with stakeholders to ensure projects succeed. * Lead Shopify web/app development projects from design to delivery * Provide technical leadership, code reviews, and mentorship * Ensure best practices in CI/CD, performance, and accessibility * Collaborate with clients, PMs, and BAs to align on goals * Support and inspire your team to grow professionally
NEWFEATURED
)
Experience with AWS, Kubernetes, Service Mesh, and API Security (including authentication and authorization).
Experience with AWS, Kubernetes, Service Mesh, and API Security (including authentication and authorization).
NEW
)
Extensive Salesforce development experience (including Apex triggers, classes, asynchronous Apex, API Integrations, Platform Events, LWCs and Sites)
Extensive Salesforce development experience (including Apex triggers, classes, asynchronous Apex, API Integrations, Platform Events, LWCs and Sites)
NEW
Experience with AWS, Kubernetes, Service Mesh, API gateways, and API Security (authentication and authorization).
Experience with AWS, Kubernetes, Service Mesh, API gateways, and API Security (authentication and authorization).
NEW