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        35 Contract API jobs in Harlow + 20 miles

        187 exact matches jobs are outside your preferred location

        iOS Mobile Engineer

        Queen Square Recruitment Limited
        W1, Central London
        From £70,000 to £90,000 per annum
        Were looking for a talented iOS Mobile Engineer to join our growing team in London, working 4 days per week on cutting-edge mobile products that integrate with AI and modern APIs. In this role, youll play a key part in designing, developing, and maintaining robust iOS applications, while collaborating with designers, backend engineers, and AI specialists. Youll thrive if youre excited about modern mobile architecture, seamless user experiences, and the intersection of AI and mobile. What Youll Do * Design, build, and maintain iOS apps using Swift, following best practices from both the client and OEMs * Collaborate on UI/UX design, DevOps workflow, and priority features with the wider team * Participate in code reviews, and help resolve bugs, changes, and feedback efficiently * Integrate RESTful APIs with backend teams to deliver seamless mobile functionality
        Were looking for a talented iOS Mobile Engineer to join our growing team in London, working 4 days per week on cutting-edge mobile products that integrate with AI and modern APIs. In this role, youll play a key part in designing, developing, and maintaining robust iOS applications, while collaborating with designers, backend engineers, and AI specialists. Youll thrive if youre excited about modern mobile architecture, seamless user experiences, and the intersection of AI and mobile. What Youll Do * Design, build, and maintain iOS apps using Swift, following best practices from both the client and OEMs * Collaborate on UI/UX design, DevOps workflow, and priority features with the wider team * Participate in code reviews, and help resolve bugs, changes, and feedback efficiently * Integrate RESTful APIs with backend teams to deliver seamless mobile functionality
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        NEW
        Job Role:Senior Full-Stack PHP Developer - Working Hours:5 days per week - Job Type:Permanent - Salary:£70,000 - £85,000 depending on experience - Location:London - Remote: 4 days remote - 1 day on-site in London office - Postcode NW6 - About the Company - Our client is a rapidly growing platform that connects individuals with industry professionals for special events. By offering unique opportunities, the platform allows professionals in the field to achieve higher earnings while enjoying enhanced flexibility and a better work-life balance. Role Overview - This is an exciting opportunity to join a high-growth, early-stage startup. As a Full-Stack Developer, youll work closely with the founders and engineers in a tight-knit, London-based team. Youll have a direct impact on the companys expansion into new international markets, shaping the future of the business.
        Job Role:Senior Full-Stack PHP Developer - Working Hours:5 days per week - Job Type:Permanent - Salary:£70,000 - £85,000 depending on experience - Location:London - Remote: 4 days remote - 1 day on-site in London office - Postcode NW6 - About the Company - Our client is a rapidly growing platform that connects individuals with industry professionals for special events. By offering unique opportunities, the platform allows professionals in the field to achieve higher earnings while enjoying enhanced flexibility and a better work-life balance. Role Overview - This is an exciting opportunity to join a high-growth, early-stage startup. As a Full-Stack Developer, youll work closely with the founders and engineers in a tight-knit, London-based team. Youll have a direct impact on the companys expansion into new international markets, shaping the future of the business.
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        NEW
        We have an exciting opportunity for a Senior Salesforce Administrator / Developer(Technical Specialist) at NPL. The focus for this role is to lead on the design, development, and support of the platform. Youll be joining the Enterprise Systems team. Salesforce is becoming a crucial business tool within NPL and we require a Snr Salesforce Administrator/Developer(Technical Specialist) to support the adoption within the business. The person will be required to collaborate withkey stakeholders in the organisation, including Sales, Marketing, Commercial Excellence,business analysts,project managersand end-users to gather and analyse their business needs and requirements, and to consequently drive the development of the Salesforce platform in response to those needs to meet strategic objectives. This role will be looked upon to execute and lead on technical implementations
        We have an exciting opportunity for a Senior Salesforce Administrator / Developer(Technical Specialist) at NPL. The focus for this role is to lead on the design, development, and support of the platform. Youll be joining the Enterprise Systems team. Salesforce is becoming a crucial business tool within NPL and we require a Snr Salesforce Administrator/Developer(Technical Specialist) to support the adoption within the business. The person will be required to collaborate withkey stakeholders in the organisation, including Sales, Marketing, Commercial Excellence,business analysts,project managersand end-users to gather and analyse their business needs and requirements, and to consequently drive the development of the Salesforce platform in response to those needs to meet strategic objectives. This role will be looked upon to execute and lead on technical implementations
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        NEWFEATURED

        Python Developer

        McGregor Boyall Associates Limited
        London
        £600 - £700 per day
        Join a global financial services leader at the forefront of electronic trading infrastructure. They are looking for a skilled Python Software Engineer to contribute to cutting-edge automation tools powering low-latency trading systems. This is a Senior engineering role within a high-impact team shaping infrastructure for global markets. What You'll Do * Design, build, and maintain automation tools supporting electronic trading infrastructure * Take ownership of components from design to deployment * Collaborate across teams in a fast-paced, regulated environment?? Tech You'll Work With * Core Python with OOP, data structures, and regex * Linux CLI, debugging with tcpdump, strace, etc. * Git, Jenkins, TDD, and CI pipelines * RESTful APIs, Ansible (bonus), and even Golang (bonus)? What We're Looking For * Strong Python development skills and testing experience
        Join a global financial services leader at the forefront of electronic trading infrastructure. They are looking for a skilled Python Software Engineer to contribute to cutting-edge automation tools powering low-latency trading systems. This is a Senior engineering role within a high-impact team shaping infrastructure for global markets. What You'll Do * Design, build, and maintain automation tools supporting electronic trading infrastructure * Take ownership of components from design to deployment * Collaborate across teams in a fast-paced, regulated environment?? Tech You'll Work With * Core Python with OOP, data structures, and regex * Linux CLI, debugging with tcpdump, strace, etc. * Git, Jenkins, TDD, and CI pipelines * RESTful APIs, Ansible (bonus), and even Golang (bonus)? What We're Looking For * Strong Python development skills and testing experience
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        NEW
        A fantastic opportunity has arisen for a Data Analyst to join a market leader in environmental safety solutions, based in Dartford. Offering a salary of up to £50,000, this hybrid role requires four days per week in the office and one day working from home. You’ll play a pivotal role in analysing complex datasets, building dashboards, and helping to drive business intelligence across a growing and forward-thinking organisation that supports safe working environments across construction, industrial, and infrastructure sectors. Duties & Responsibilities * Collaborate with key stakeholders to gather and translate business data requirements * Design and maintain reports and dashboards using Power BI and other BI tools * Use Microsoft Fabric and Azure to manage ETL processes across systems * Conduct detailed data validation and ensure consistent data quality standards
        A fantastic opportunity has arisen for a Data Analyst to join a market leader in environmental safety solutions, based in Dartford. Offering a salary of up to £50,000, this hybrid role requires four days per week in the office and one day working from home. You’ll play a pivotal role in analysing complex datasets, building dashboards, and helping to drive business intelligence across a growing and forward-thinking organisation that supports safe working environments across construction, industrial, and infrastructure sectors. Duties & Responsibilities * Collaborate with key stakeholders to gather and translate business data requirements * Design and maintain reports and dashboards using Power BI and other BI tools * Use Microsoft Fabric and Azure to manage ETL processes across systems * Conduct detailed data validation and ensure consistent data quality standards
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        5+ years experience in working with the .NET framework, particularly with ASP.NET Core, React/React Native, C#, Web API Experience developing REST API-driven mobile first web applications
        5+ years experience in working with the .NET framework, particularly with ASP.NET Core, React/React Native, C#, Web API Experience developing REST API-driven mobile first web applications
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        NEW

        Full Stack Developer

        Rise Technical
        London
        £60000.00 - £70000.00 per annum + + Equity
        The ideal candidate will have a robust background in AWS, Node.js, and React, along with expertise in NoSQL databases, RESTful API design and development, product development, and deployment of applications on both iOS and Android platforms.
        The ideal candidate will have a robust background in AWS, Node.js, and React, along with expertise in NoSQL databases, RESTful API design and development, product development, and deployment of applications on both iOS and Android platforms.
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        NEW
        We have a fantastic new job opportunity for a Senior Software Engineer / Software Developer who has proven software application development experience across the stack C#, ASP, .NET, Blazor, API Development, Microservices, Containers and Deployment Pipelines. * Strong software development skills across the stack using C#, ASP .NET, Blazor, API development, microservices, containers, and deployment pipelines
        We have a fantastic new job opportunity for a Senior Software Engineer / Software Developer who has proven software application development experience across the stack C#, ASP, .NET, Blazor, API Development, Microservices, Containers and Deployment Pipelines. * Strong software development skills across the stack using C#, ASP .NET, Blazor, API development, microservices, containers, and deployment pipelines
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        NEW

        Full Stack Lead Engineer

        Hunter Selection
        Soho, W1
        £60000 - £85000 per annum + health insurance life insurance
        Restful API development - React | TypeScript | NodeJS | AWS | Event driven Architecture | CDK | Lambda | Cognito | S3 | SQS | Eventbridge | Restful API | API | SQL | NoSQL | messaging queues | WebSockets | DevOps | CI/CD | GitHub | WebAssembly | Infrastructure as Code | React | TypeScript | NodeJS | AWS | Event driven Architecture | CDK | Lambda | Cognito | S3 | SQS | Eventbridge | Restful API | API | SQL | NoSQL | messaging queues | WebSockets | DevOps | CI/CD | GitHub | WebAssembly | Infrastructure as Code | React | TypeScript | NodeJS | AWS | Event driven Architecture | CDK | Lambda | Cognito | S3 | SQS | Eventbridge | Restful API | API | SQL | NoSQL | messaging queues | WebSockets | DevOps | CI/CD | GitHub | WebAssembly | Infrastructure as Code
        Restful API development - React | TypeScript | NodeJS | AWS | Event driven Architecture | CDK | Lambda | Cognito | S3 | SQS | Eventbridge | Restful API | API | SQL | NoSQL | messaging queues | WebSockets | DevOps | CI/CD | GitHub | WebAssembly | Infrastructure as Code | React | TypeScript | NodeJS | AWS | Event driven Architecture | CDK | Lambda | Cognito | S3 | SQS | Eventbridge | Restful API | API | SQL | NoSQL | messaging queues | WebSockets | DevOps | CI/CD | GitHub | WebAssembly | Infrastructure as Code | React | TypeScript | NodeJS | AWS | Event driven Architecture | CDK | Lambda | Cognito | S3 | SQS | Eventbridge | Restful API | API | SQL | NoSQL | messaging queues | WebSockets | DevOps | CI/CD | GitHub | WebAssembly | Infrastructure as Code
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        NEWFEATURED
        We are seeking a proactive and customer-focused Service Desk Analyst to join our Service Management team. In this role, you will deliver prompt and professional solutions for customer requests and be the first point of contact for our internal and external users, providing essential technical support. You will receive, triage, and resolve a wide range of IT-related incidents and service requests, ensuring a smooth and efficient user experience. Your ability to communicate effectively, diagnose issues, and escalate appropriately will be crucial to your success. Provide first-line support to users, attempting to resolve issues at Level 1. Diagnose and troubleshoot hardware, software, and network issues. Escalate complex incidents to Level 2 and 3 support teams, providing detailed information. Track and monitor incidents, ensuring timely resolution and communication with
        We are seeking a proactive and customer-focused Service Desk Analyst to join our Service Management team. In this role, you will deliver prompt and professional solutions for customer requests and be the first point of contact for our internal and external users, providing essential technical support. You will receive, triage, and resolve a wide range of IT-related incidents and service requests, ensuring a smooth and efficient user experience. Your ability to communicate effectively, diagnose issues, and escalate appropriately will be crucial to your success. Provide first-line support to users, attempting to resolve issues at Level 1. Diagnose and troubleshoot hardware, software, and network issues. Escalate complex incidents to Level 2 and 3 support teams, providing detailed information. Track and monitor incidents, ensuring timely resolution and communication with
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        NEW

        Senior Software Engineer

        Verifile Ltd
        Bedford, Bedfordshire, MK44 3JZ
        From £60,000 to £70,000 per annum Plus excellent benefits
        Strong software development skills across the stack using C#, ASP .NET, Blazor, API development, microservices, containers, and deployment pipelines.
        Strong software development skills across the stack using C#, ASP .NET, Blazor, API development, microservices, containers, and deployment pipelines.
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        NEWFEATURED
        Work closely with the team to develop new features, such as better interpretation layers, enhanced data decoding, and improved API coverage for various blockchain data.
        Work closely with the team to develop new features, such as better interpretation layers, enhanced data decoding, and improved API coverage for various blockchain data.
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        NEW
        Job Description Summary - Join us at GE Vernova Grid Software to be part of the team leading the digital transformation of the energy market. As the worlds energy sector moves away from fossil fuels toward renewable energy sources, industrial companies are challenged with addressing this transition in transformative ways. Digitization will be key to making power-generating assets more efficient and the electric grid more secure and resilient. Our Geospatial products play a critical role in this transformation by supporting the design, modelling and maintenance of electric, gas and telecommunication networks. For more information on our strategy, check out GridOS overview ( will be a part of our Grid Software Engineering team, an Agile organization with a flexible working environment, where we are always looking to innovate our products and the processes and technologi
        Job Description Summary - Join us at GE Vernova Grid Software to be part of the team leading the digital transformation of the energy market. As the worlds energy sector moves away from fossil fuels toward renewable energy sources, industrial companies are challenged with addressing this transition in transformative ways. Digitization will be key to making power-generating assets more efficient and the electric grid more secure and resilient. Our Geospatial products play a critical role in this transformation by supporting the design, modelling and maintenance of electric, gas and telecommunication networks. For more information on our strategy, check out GridOS overview ( will be a part of our Grid Software Engineering team, an Agile organization with a flexible working environment, where we are always looking to innovate our products and the processes and technologi
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        NEW
        Working with top developers from around the world, helping to implement Kong Products and Technologies, including our API Gateway, AI Gateway and ServiceMesh solutions - Kong Inc., a leading developer of cloud API technologies, is on a mission to enable companies around the world to become API-first and securely accelerate AI adoption.
        Working with top developers from around the world, helping to implement Kong Products and Technologies, including our API Gateway, AI Gateway and ServiceMesh solutions - Kong Inc., a leading developer of cloud API technologies, is on a mission to enable companies around the world to become API-first and securely accelerate AI adoption.
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        NEW
        API and third-party integrations experience is essential, including writing ICDs. * Integration with REST Api, ActiveMQ, Kafka, SOAP, IBM WebSphere, MSMQ and more.
        API and third-party integrations experience is essential, including writing ICDs. * Integration with REST Api, ActiveMQ, Kafka, SOAP, IBM WebSphere, MSMQ and more.
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        Frequently Asked Questions

        How many contract API jobs are there in Harlow?
        There are 35 contract API jobs within 20 miles of Harlow available on CWJobs right now.

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