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        • Hertfordshire

        59 Permanent API jobs in Hertford + 20 miles

        465 exact matches jobs are outside your preferred location

        Senior Online Developer - Tech Team

        Rebellion
        Oxford, Oxfordshire
        Competitive
        We want you to #JOINTHEREBELLION! For 30 years weve been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and through 2000AD, publish comics and graphic novels such as the amazing Judge Dredd. We are seeking an experienced and highly skilled back-end Senior Online Developer to join our tech team, to help build and support internal and external web APIs to support our game engine team. The successful candidate will join a small team and user their specialist JavaScript knowledge to be involved in the entire software development lifecycle, from requirements gathering and system design to implementation, testing, deployment, and maintenance.
        We want you to #JOINTHEREBELLION! For 30 years weve been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and through 2000AD, publish comics and graphic novels such as the amazing Judge Dredd. We are seeking an experienced and highly skilled back-end Senior Online Developer to join our tech team, to help build and support internal and external web APIs to support our game engine team. The successful candidate will join a small team and user their specialist JavaScript knowledge to be involved in the entire software development lifecycle, from requirements gathering and system design to implementation, testing, deployment, and maintenance.
        more
        2025-08-15T00:00:00.000Z - London - full - Lyst is a global Fashion Tech company and premium shopping app, founded in London in 2010 and catering to over 200M shoppers per year. We offer our customers the largest assortment of premium & luxury fashion items & products in one place, via an assortment of 8.5M+ items from over 17,000 of the world's leading brands. We are a scale-up business with a current team size of c.150 people in London, combining an agile mentality with a proven business model and over a decade of experience. This provides a balance between foundations and structure, and autonomy and pace. At Lyst we obsess over the customer, providing a search & discovery experience which offers inspiration, fulfilment, and personalisation. We believe that fashion is amazing but shopping for fashion often isn't, and use our technology, data and creativity to bring
        2025-08-15T00:00:00.000Z - London - full - Lyst is a global Fashion Tech company and premium shopping app, founded in London in 2010 and catering to over 200M shoppers per year. We offer our customers the largest assortment of premium & luxury fashion items & products in one place, via an assortment of 8.5M+ items from over 17,000 of the world's leading brands. We are a scale-up business with a current team size of c.150 people in London, combining an agile mentality with a proven business model and over a decade of experience. This provides a balance between foundations and structure, and autonomy and pace. At Lyst we obsess over the customer, providing a search & discovery experience which offers inspiration, fulfilment, and personalisation. We believe that fashion is amazing but shopping for fashion often isn't, and use our technology, data and creativity to bring
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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.
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        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).
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        Familiarity with API testing and integration diagnostics
        Familiarity with API testing and integration diagnostics
        NEW
        You will lead four teams: Platform Engineering (cloud, data platforms, developer tooling), Backstage (internal developer portal), API Developer Portal (external partner integrations), and QA Engineering (central QA strategy). What youll be doing In this role, you will provide strategic leadership for our Platform Engineering, Backstage, API Developer Portal, and QA Engineering teams, setting the vision and direction while aligning emerging industry trends with business priorities across IAG Loyalty and BA Holidays.
        You will lead four teams: Platform Engineering (cloud, data platforms, developer tooling), Backstage (internal developer portal), API Developer Portal (external partner integrations), and QA Engineering (central QA strategy). What youll be doing In this role, you will provide strategic leadership for our Platform Engineering, Backstage, API Developer Portal, and QA Engineering teams, setting the vision and direction while aligning emerging industry trends with business priorities across IAG Loyalty and BA Holidays.
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        Data Architect

        International SOS Assistance UK Ltd
        London
        Competitive
        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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        Minimum of 5 years experience as a C# Developer with proficiency in Python, .NET framework and C# as well as experience with ML.NET, ASP.NET, MVC, Web API Containers (Docker/Kubernetes), Machine Learning Operations (MLOps) and CI/CD
        Minimum of 5 years experience as a C# Developer with proficiency in Python, .NET framework and C# as well as experience with ML.NET, ASP.NET, MVC, Web API Containers (Docker/Kubernetes), Machine Learning Operations (MLOps) and CI/CD
        more
        NEW
        Replacement of current EDI provider for EMEA, with delivery through new global API led integrations - Rollout of B2B E-Invoicing compliance for Belgium, France and Germany with transition to new global API led integrations.
        Replacement of current EDI provider for EMEA, with delivery through new global API led integrations - Rollout of B2B E-Invoicing compliance for Belgium, France and Germany with transition to new global API led integrations.
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        Extensive experience with AWS core services such as AWS Organisations, S3, EC2, ECS, ECR, KMS, RDS, SQS, SNS, Lambda, VPC, IAM, API Gateway, etc.
        Extensive experience with AWS core services such as AWS Organisations, S3, EC2, ECS, ECR, KMS, RDS, SQS, SNS, Lambda, VPC, IAM, API Gateway, etc.
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        Manage the Kong API Gateway to allow external ingress traffic into the DataCamp Platform. * You have experience with API-gateways or service meshes (Kong, Istio, etc)
        Manage the Kong API Gateway to allow external ingress traffic into the DataCamp Platform. * You have experience with API-gateways or service meshes (Kong, Istio, etc)
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        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.
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        Frequently Asked Questions

        How many permanent API jobs are there in Hertford?
        There are 59 permanent API jobs within 20 miles of Hertford available on CWJobs right now.

        What other similar jobs are there to permanent API jobs in Hertford?
        As well as permanent API jobs in Hertford, you can find permanent IT, Software Development, Management, amongst many others.