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40 Contract API jobs in Borehamwood + 20 miles
328 exact matches jobs are outside your preferred location
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
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.
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
About Mesh-AI - We're a transformation consultancy and we exist to reimagine how enterprises operate, making data and AI their competitive advantage. We turn enterprises into data-driven and AI enabled organisations, unleashing business growth and accelerating outcomes. We're building an open, collaborative culture and we are always on the lookout for top talent to join us in our next phase of growth. If you're interested in working on business-defining engagements with some of the brightest minds in the industry, apply below! Overview - Mesh-AI are seeking an exceptional Principal Software Engineer to lead delivery of exciting engagements within our Energy & Commodities Trading sector. This role demands a unique combination of hands-on technical excellence and deep domain expertise in trading environments.
About Mesh-AI - We're a transformation consultancy and we exist to reimagine how enterprises operate, making data and AI their competitive advantage. We turn enterprises into data-driven and AI enabled organisations, unleashing business growth and accelerating outcomes. We're building an open, collaborative culture and we are always on the lookout for top talent to join us in our next phase of growth. If you're interested in working on business-defining engagements with some of the brightest minds in the industry, apply below! Overview - Mesh-AI are seeking an exceptional Principal Software Engineer to lead delivery of exciting engagements within our Energy & Commodities Trading sector. This role demands a unique combination of hands-on technical excellence and deep domain expertise in trading environments.
About the Opportunity - Learning Services is charged with creating impactful, scalable learning experiences to help content authors, content architects, and software developers get the most out of the Contentful platform. We don't do average. We're out to reset the industry standard for helping customers and partners to quickly create value while building on best practices that lead to long term success. What to expect? * Because you are exceptionally clever and have lots of relevant experience, you will quickly become a Contentful expert (if you're not one already). * You will deliver onsite and webinar-based training to Contentful customers and partners on Contentful architecture and features, content modeling best practices, using Contentful APIs and SDKs, CI/CD strategies, extending the Contentful environment with webhooks and UI extensions, and other topics.
About the Opportunity - Learning Services is charged with creating impactful, scalable learning experiences to help content authors, content architects, and software developers get the most out of the Contentful platform. We don't do average. We're out to reset the industry standard for helping customers and partners to quickly create value while building on best practices that lead to long term success. What to expect? * Because you are exceptionally clever and have lots of relevant experience, you will quickly become a Contentful expert (if you're not one already). * You will deliver onsite and webinar-based training to Contentful customers and partners on Contentful architecture and features, content modeling best practices, using Contentful APIs and SDKs, CI/CD strategies, extending the Contentful environment with webhooks and UI extensions, and other topics.
Strong understanding of data integration concepts, file formats (CSV, Excel), and API-based workflows. * Hands-on experience with Postman for API testing, plus ability to read and analyze technical logs.
Strong understanding of data integration concepts, file formats (CSV, Excel), and API-based workflows. * Hands-on experience with Postman for API testing, plus ability to read and analyze technical logs.
REST API design
REST API design
Deep knowledge of enterprise architecture patterns, public cloud services (Azure, AWS), application design, integration patterns (API, event-driven), and data platforms.
Deep knowledge of enterprise architecture patterns, public cloud services (Azure, AWS), application design, integration patterns (API, event-driven), and data platforms.
Lead API design, integration strategies, and legacy modernization to microservices. * Integration - API Design & Management, CMS, Legacy Migration
Lead API design, integration strategies, and legacy modernization to microservices. * Integration - API Design & Management, CMS, Legacy Migration
Hands-on .NET experience, including C# and ASP.NET WEB API.
Hands-on .NET experience, including C# and ASP.NET WEB API.
REST API design
REST API design
The responsibilities are cross-functional, ranging from infrastructure, API design & coding all the way to client-side integration(we are using Golang).
The responsibilities are cross-functional, ranging from infrastructure, API design & coding all the way to client-side integration(we are using Golang).
Deep knowledge of API design and microservices architecture.
Deep knowledge of API design and microservices architecture.
Familiarity with API-based integrations and middleware platforms including SFTP file transfers.
Familiarity with API-based integrations and middleware platforms including SFTP file transfers.
Experience of RESTful API design
Experience of RESTful API design
M365/Azure API integrations.
M365/Azure API integrations.
Implement data solutions leveraging AWS services such as EMR, AWS Glue, AWS Lambda, Athena, API Gateway and AWS Step Functions * Hands-on experience with AWS data services such as EMR, AWS Glue, AWS Lambda, Athena, API Gateway and AWS Step Functions
Implement data solutions leveraging AWS services such as EMR, AWS Glue, AWS Lambda, Athena, API Gateway and AWS Step Functions * Hands-on experience with AWS data services such as EMR, AWS Glue, AWS Lambda, Athena, API Gateway and AWS Step Functions
Experience with REST API development and microservices architectures
Experience with REST API development and microservices architectures
Strong API development and database experience (Postgres/Oracle + SQL).
Strong API development and database experience (Postgres/Oracle + SQL).
Technology Stack Proficiency : Experienced in Microsoft technologies (C#, ASP.NET Core, Web API), JavaScript (AngularJS or React), and Azure Microservices.
Technology Stack Proficiency : Experienced in Microsoft technologies (C#, ASP.NET Core, Web API), JavaScript (AngularJS or React), and Azure Microservices.
Implement and maintain Azure Firewall, API Management (APIM), Databases, Service Bus, and Event Grid.
Implement and maintain Azure Firewall, API Management (APIM), Databases, Service Bus, and Event Grid.
Youll join the team responsible for running the core infrastructure that supports products like ChatGPT and the API.
Youll join the team responsible for running the core infrastructure that supports products like ChatGPT and the 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.
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.
Experience in developing and deploying Cloud Native Applications using Azure PaaS Capabilities (App Services Plans, Key Vault, SQL Azure DB, AzureFunctions, Containers, AKS, Logic Apps, Service Bus, Event Grid, API Management) * Experience in Enterprise Integration Technologies such as Azure API Management, Logic Apps, Service Bus
Experience in developing and deploying Cloud Native Applications using Azure PaaS Capabilities (App Services Plans, Key Vault, SQL Azure DB, AzureFunctions, Containers, AKS, Logic Apps, Service Bus, Event Grid, API Management) * Experience in Enterprise Integration Technologies such as Azure API Management, Logic Apps, Service Bus
Programming Languages Proficient in Programming languages like .NET 8, ASP.NET Core, Web API, .NET Framework C#.NET, WPF, JavaScript, JQuery, Ajax, HTML, SQL, Visual Fox Pro
Programming Languages Proficient in Programming languages like .NET 8, ASP.NET Core, Web API, .NET Framework C#.NET, WPF, JavaScript, JQuery, Ajax, HTML, SQL, Visual Fox Pro
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