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        Date posted

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        226




        60 API jobs in Essex + 20 miles

        166 exact matches jobs are outside your preferred location

        Senior Software Engineer (Full Stack)

        RELX
        South East
        Competitive
        Our global team support products education electronic health records that introduce students to digital charting and prepare them to document care in todays modern clinical environment. We have a very stable product that weve worked to get to and strive to maintain. Our team values trust, respect, collaboration, agility, and quality. As a Full Stack Web Developer, you will contribute to designing and developing web applications that support research publication management. You will work on both frontend and backend tasks, collaborating with a supportive, multidisciplinary team. * Partner with stakeholders to gather and refine requirements * Draft clear technical documentation for features * Develop, test, and maintain application components using modern web technologies * Uphold code quality through reviews and inclusive standards
        Our global team support products education electronic health records that introduce students to digital charting and prepare them to document care in todays modern clinical environment. We have a very stable product that weve worked to get to and strive to maintain. Our team values trust, respect, collaboration, agility, and quality. As a Full Stack Web Developer, you will contribute to designing and developing web applications that support research publication management. You will work on both frontend and backend tasks, collaborating with a supportive, multidisciplinary team. * Partner with stakeholders to gather and refine requirements * Draft clear technical documentation for features * Develop, test, and maintain application components using modern web technologies * Uphold code quality through reviews and inclusive standards
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        Cybersecurity Incident Response Specialist - CONTRACT OPPORTUNITY * Remote with occasional trips to London (not expensed). * £750.00 per day. * 6 months. * ASAP start, ASAP interviews. * Right to work in the UK mandatory. The Cybersecurity Incident Response Specialist will be responsible for investigating, analysing and providing specialist expertise for the resolution of security incidents / attacks aimed at the client. Support the long-term strategic goals of Cyber Operations pillar support Senior Analysts and Analysts in managing incidents and liaise with SOC engineers to ensure appropriate security measures, technologies and processes are in place to avoid reoccurrence of incidents. * Demonstrate an ability to understand in detail how an incident has occurred without relying on alerts (e.g., reviewing logs and threat intelligence data).
        Cybersecurity Incident Response Specialist - CONTRACT OPPORTUNITY * Remote with occasional trips to London (not expensed). * £750.00 per day. * 6 months. * ASAP start, ASAP interviews. * Right to work in the UK mandatory. The Cybersecurity Incident Response Specialist will be responsible for investigating, analysing and providing specialist expertise for the resolution of security incidents / attacks aimed at the client. Support the long-term strategic goals of Cyber Operations pillar support Senior Analysts and Analysts in managing incidents and liaise with SOC engineers to ensure appropriate security measures, technologies and processes are in place to avoid reoccurrence of incidents. * Demonstrate an ability to understand in detail how an incident has occurred without relying on alerts (e.g., reviewing logs and threat intelligence data).
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        About Revolut - People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products including spending, saving, investing, exchanging, travelling, and more help our 60+ million customers get more from their money every day. As we continue our lightning-fast growth,? 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work. So far, we have 10,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution. About the role
        About Revolut - People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products including spending, saving, investing, exchanging, travelling, and more help our 60+ million customers get more from their money every day. As we continue our lightning-fast growth,? 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work. So far, we have 10,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution. About the role
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        Do you bring a breadth of technical expertise across reservation systems, Dynamics CRM, and API design? * Deep technical expertise across API design, integration layers, and data flow management.
        Do you bring a breadth of technical expertise across reservation systems, Dynamics CRM, and API design? * Deep technical expertise across API design, integration layers, and data flow management.
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        NEWFEATURED

        Technical Lead

        Zorba Consulting
        UK
        From £60,000 to £70,000 per annum 28 days hols, health insurance, soci
        Join a fast-growing HR software company as a Technical Lead for their Integration team with Client Facing experience, leading/mentoring technical teams and API development & integrations experience (C#, .NET, SQL Server). * 4+ years experience in API development and integrations (REST, SOAP, GraphQL) * Expertise in AWS services (Lambda, API Gateway, S3, DynamoDB, SQS, SNS)
        Join a fast-growing HR software company as a Technical Lead for their Integration team with Client Facing experience, leading/mentoring technical teams and API development & integrations experience (C#, .NET, SQL Server). * 4+ years experience in API development and integrations (REST, SOAP, GraphQL) * Expertise in AWS services (Lambda, API Gateway, S3, DynamoDB, SQS, SNS)
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        Skilled in integrating third-party services, including API management (e.g., Google Apigee) and Identity Access Management (e.g., Okta).
        Skilled in integrating third-party services, including API management (e.g., Google Apigee) and Identity Access Management (e.g., Okta).
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        The Hoddesdon site has state-of-the-art Good Manufacturing Practice (GMP) standard facilities for the development of Active Pharmaceutical Ingredients (API), Formulation Development (FD) and Process Chemistry (PC).
        The Hoddesdon site has state-of-the-art Good Manufacturing Practice (GMP) standard facilities for the development of Active Pharmaceutical Ingredients (API), Formulation Development (FD) and Process Chemistry (PC).
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        The Hoddesdon site has state-of-the-art Good Manufacturing Practice (GMP) standard facilities for the development of Active Pharmaceutical Ingredients (API), Formulation Development (FD) and Process Chemistry (PC).
        The Hoddesdon site has state-of-the-art Good Manufacturing Practice (GMP) standard facilities for the development of Active Pharmaceutical Ingredients (API), Formulation Development (FD) and Process Chemistry (PC).
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        Cryptographic Protocols Practical understanding and hands-on experience with KMIP, PKCS#11, REST API, SNMP, and TLS for secure communications and integrations. * Knowledge of Functional Modules, API developments.
        Cryptographic Protocols Practical understanding and hands-on experience with KMIP, PKCS#11, REST API, SNMP, and TLS for secure communications and integrations. * Knowledge of Functional Modules, API developments.
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        Implement and optimize robust API integrations (REST and GraphQL) with backend systems. * Reliable delivery of API-driven features that meet product requirements. * Demonstrated experience building and maintaining API integrations (REST, GraphQL, or gRPC).
        Implement and optimize robust API integrations (REST and GraphQL) with backend systems. * Reliable delivery of API-driven features that meet product requirements. * Demonstrated experience building and maintaining API integrations (REST, GraphQL, or gRPC).
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        Advanced understanding of good practice API development, integration, and testing (e.g. RESTful services, GraphQL). * Experience with both front-end (e.g. React, TypeScript) and back-end (.NET C#, ASP.NET) development, especially related to API consumption good practices such as schema validation, or event-driven architectures (e.g. webhooks).
        Advanced understanding of good practice API development, integration, and testing (e.g. RESTful services, GraphQL). * Experience with both front-end (e.g. React, TypeScript) and back-end (.NET C#, ASP.NET) development, especially related to API consumption good practices such as schema validation, or event-driven architectures (e.g. webhooks).
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        Institutional User Experience (UX/API) This includes driving excellence across both the Web UI and API architecture, ensuring resilience, scalability, and ease of integration for institutional clients. * Proven ability to translate complex financial and security requirements into intuitive, compliance-aware user journeys for web platforms and B2B API integrations.
        Institutional User Experience (UX/API) This includes driving excellence across both the Web UI and API architecture, ensuring resilience, scalability, and ease of integration for institutional clients. * Proven ability to translate complex financial and security requirements into intuitive, compliance-aware user journeys for web platforms and B2B API integrations.
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        Day to day we build backend services, integrations with platforms like the Google Ads API, and features within Campaign Manager that give hoteliers both strategic control and tactical flexibility. * Integrations: Google Ads API, various metasearch and advertising platforms * Familiarity with the Google Ads API. * gRPC experience (we maintain a TypeScript Google Ads API library).
        Day to day we build backend services, integrations with platforms like the Google Ads API, and features within Campaign Manager that give hoteliers both strategic control and tactical flexibility. * Integrations: Google Ads API, various metasearch and advertising platforms * Familiarity with the Google Ads API. * gRPC experience (we maintain a TypeScript Google Ads API library).
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        Remote (UK, Netherlands, Germany) About Us - Studio 397 and Motorsport Games are the video game developer and publishers of Le Mans Ultimate the Official Video Game of the FIA World Endurance Championship and 24 Hours of Le Mans available now on Steam. We also run the popular rFactor 2 simulation title and have created an online matchmaking and player management system for racing games called RaceControl. We are a close-knit, passionate team committed to creating the most realistic motorsport simulations in the world. Our team works remotely, primarily across Europe, and we pride ourselves on technical excellence, collaboration, and innovation. The Role - We are seeking a Senior Console Developer to play a key role in developing the next generation of our technology for modern console platforms (PlayStation, Xbox).
        Remote (UK, Netherlands, Germany) About Us - Studio 397 and Motorsport Games are the video game developer and publishers of Le Mans Ultimate the Official Video Game of the FIA World Endurance Championship and 24 Hours of Le Mans available now on Steam. We also run the popular rFactor 2 simulation title and have created an online matchmaking and player management system for racing games called RaceControl. We are a close-knit, passionate team committed to creating the most realistic motorsport simulations in the world. Our team works remotely, primarily across Europe, and we pride ourselves on technical excellence, collaboration, and innovation. The Role - We are seeking a Senior Console Developer to play a key role in developing the next generation of our technology for modern console platforms (PlayStation, Xbox).
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        Key Information Salary : £39,805 - £49,023 - Commencement on the salary range is subject to comparable skills and experience. Duration of Contract : Fixed Term for 12 Months Hours per week : Full time (35 hours per week) Location: Sutton Closing Date : 02nd November 2025 - This is an office-based role. Requests for hybrid working (splitting time between our Sutton site and home) may be considered following successful completion of the probation period/key training and if the role allows. Flexible working options may be considered. We reserve the right to close this vacancy early if we receive a high volume of applications. We encourage interested candidates to apply as soon as possible to ensure consideration. Job Details - Summary of Role - We would like to appoint an Application Developer to be responsible for the software development of a Greener Trials Toolkit.
        Key Information Salary : £39,805 - £49,023 - Commencement on the salary range is subject to comparable skills and experience. Duration of Contract : Fixed Term for 12 Months Hours per week : Full time (35 hours per week) Location: Sutton Closing Date : 02nd November 2025 - This is an office-based role. Requests for hybrid working (splitting time between our Sutton site and home) may be considered following successful completion of the probation period/key training and if the role allows. Flexible working options may be considered. We reserve the right to close this vacancy early if we receive a high volume of applications. We encourage interested candidates to apply as soon as possible to ensure consideration. Job Details - Summary of Role - We would like to appoint an Application Developer to be responsible for the software development of a Greener Trials Toolkit.
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        At RemoteStar , we're currently hiring for one of our client based in Spain. 9-month fixed-term contract | Hybrid (3 days/week onsite) | Location: Barcelona or Madrid - Well-funded and fast-growing deep-tech company founded in 2019. We are the biggest Quantum Software company in the EU. They are also one of the 100 most promising companies in AI in the world (according to CB Insights, 2023) with 150+ employees and growing, fully multicultural and international. They provide hyper-efficient software to companies seeking to gain an edge with quantum computing and artificial intelligence. Their main products, Singularity and CompactifAI, address critical needs across various industries. Required Qualifications * Masters, or Ph.D. in Computer Science, AI, Data Science, Physics, Math, or a related field. Or equivalent industry experience.
        At RemoteStar , we're currently hiring for one of our client based in Spain. 9-month fixed-term contract | Hybrid (3 days/week onsite) | Location: Barcelona or Madrid - Well-funded and fast-growing deep-tech company founded in 2019. We are the biggest Quantum Software company in the EU. They are also one of the 100 most promising companies in AI in the world (according to CB Insights, 2023) with 150+ employees and growing, fully multicultural and international. They provide hyper-efficient software to companies seeking to gain an edge with quantum computing and artificial intelligence. Their main products, Singularity and CompactifAI, address critical needs across various industries. Required Qualifications * Masters, or Ph.D. in Computer Science, AI, Data Science, Physics, Math, or a related field. Or equivalent industry experience.
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        Our world is transforming, and PTC is leading the way. Our software brings the physical and digital worlds together, enabling companies to improve operations, create better products, and empower people in all aspects of their business. Our people make all the difference in our success. Today, we are a global team of nearly 7,000 and our main objective is to create opportunities for our team members to explore, learn, and grow all while seeing their ideas come to life and celebrating the differences that make us who we are and the work we do possible. PTC is seeking an experienced Enterprise Architect to lead the design, implementation, and transformation of large-scale PLM-ERP-MES integrations within our global Customer Success PLM Segment Hub. The Enterprise Architect will serve as both a technical expert and strategic leader, overseeing the design, optimization, and
        Our world is transforming, and PTC is leading the way. Our software brings the physical and digital worlds together, enabling companies to improve operations, create better products, and empower people in all aspects of their business. Our people make all the difference in our success. Today, we are a global team of nearly 7,000 and our main objective is to create opportunities for our team members to explore, learn, and grow all while seeing their ideas come to life and celebrating the differences that make us who we are and the work we do possible. PTC is seeking an experienced Enterprise Architect to lead the design, implementation, and transformation of large-scale PLM-ERP-MES integrations within our global Customer Success PLM Segment Hub. The Enterprise Architect will serve as both a technical expert and strategic leader, overseeing the design, optimization, and
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        The ideal candidate will have strong backend automation expertise, excellent API testing skills, and a collaborative mindset to work closely with developers. * Experienced in API-based scripting
        The ideal candidate will have strong backend automation expertise, excellent API testing skills, and a collaborative mindset to work closely with developers. * Experienced in API-based scripting
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        What is the average salary for API in Essex?

        Average salary per year
        £47,499

        The average salary for a API in Essex is £47,499. API in Essex salaries range from £37,499 to £47,499.

        Frequently Asked Questions

        How many API jobs are there in Essex?
        There are 60 API jobs within 20 miles of Essex available on CWJobs right now.

        What other similar jobs are there to API jobs in Essex?
        As well as API jobs in Essex, you can find Cyber Security, Implementation, IT, amongst many others.