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        Last 14 days
        319

        319 Contract API jobs in UK + 20 miles

        C# Developer - Trade Capture

        Harvey Nash
        London
        £600 - £800 per day
        *outside iR35* What You'll Be Doing * Designing and developing enterprise-grade solutions in an Agile team. * Building and maintaining middleware services using C#, REST APIs, FIX messaging, XML, and Microservices. * Leading architecture discussions, code reviews, and release management. * Collaborating with users and cross-functional teams to define and execute testing strategies. * Mentoring junior developers and contributing to internal best practices. What You Bring * A strong academic background in Computer Science, Engineering, or a related field. * Proven experience in commodities trading, especially with derivatives and platforms like ICE, CME, NASDAQ, Trayport, or TT. * Deep knowledge of C# .NET, RESTful services, and microservice architecture. * Hands-on experience with FIX messaging, XML, AMQ, and ideally nHibernate, OData, and TDD.
        *outside iR35* What You'll Be Doing * Designing and developing enterprise-grade solutions in an Agile team. * Building and maintaining middleware services using C#, REST APIs, FIX messaging, XML, and Microservices. * Leading architecture discussions, code reviews, and release management. * Collaborating with users and cross-functional teams to define and execute testing strategies. * Mentoring junior developers and contributing to internal best practices. What You Bring * A strong academic background in Computer Science, Engineering, or a related field. * Proven experience in commodities trading, especially with derivatives and platforms like ICE, CME, NASDAQ, Trayport, or TT. * Deep knowledge of C# .NET, RESTful services, and microservice architecture. * Hands-on experience with FIX messaging, XML, AMQ, and ideally nHibernate, OData, and TDD.
        more
        Lead Salesforce Developer Contract (Outside IR35) Fully Remote - Day Rate: Competitive, open to negotiation - Duration: 6 months+ Working Arrangements: Fully Remote - Interview: 1 Video Call - About the Role - We are seeking an experienced Lead Salesforce Developer for a hands-on leadership role within a fast-growing, innovative financial services environment. You will take ownership of the Salesforce platform, leading a small, talented team and driving technical excellence across the business. What Youll Do * Lead the design, development, and deployment of Salesforce solutions * Collaborate with stakeholders to gather requirements and deliver tailored functionality * Manage and mentor a team of Salesforce professionals (Administrators, Analysts, and Developers) * Ensure data integrity, oversee integrations, and manage complex data models
        Lead Salesforce Developer Contract (Outside IR35) Fully Remote - Day Rate: Competitive, open to negotiation - Duration: 6 months+ Working Arrangements: Fully Remote - Interview: 1 Video Call - About the Role - We are seeking an experienced Lead Salesforce Developer for a hands-on leadership role within a fast-growing, innovative financial services environment. You will take ownership of the Salesforce platform, leading a small, talented team and driving technical excellence across the business. What Youll Do * Lead the design, development, and deployment of Salesforce solutions * Collaborate with stakeholders to gather requirements and deliver tailored functionality * Manage and mentor a team of Salesforce professionals (Administrators, Analysts, and Developers) * Ensure data integrity, oversee integrations, and manage complex data models
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        Role: Contract Senior Software Engineer - Backend - Rate: C.£550 Outside IR35 Per day - Location: Bradford - Hybrid (2x days on site) Length: 3-6 months - We are working with a growing, forward-thinking technology company dedicated to building scalable, reliable, and high-performing solutions for our customers. As a Senior Software Engineer, you will be responsible for designing, developing, and maintaining server-side applications and services. You'll work closely with cross-functional teams to ensure our systems are performant, secure, and deliver a great user experience. * Design, implement, and maintain backend services, APIs, and databases. * Collaborate with product managers, frontend engineers, and other stakeholders to deliver features end-to-end. * Ensure systems are scalable, reliable, and maintainable. * Write clean, testable, and efficient code following b
        Role: Contract Senior Software Engineer - Backend - Rate: C.£550 Outside IR35 Per day - Location: Bradford - Hybrid (2x days on site) Length: 3-6 months - We are working with a growing, forward-thinking technology company dedicated to building scalable, reliable, and high-performing solutions for our customers. As a Senior Software Engineer, you will be responsible for designing, developing, and maintaining server-side applications and services. You'll work closely with cross-functional teams to ensure our systems are performant, secure, and deliver a great user experience. * Design, implement, and maintain backend services, APIs, and databases. * Collaborate with product managers, frontend engineers, and other stakeholders to deliver features end-to-end. * Ensure systems are scalable, reliable, and maintainable. * Write clean, testable, and efficient code following b
        more
        Job Title: Site Reliability Engineer - 12 Month Contract - No Sponsorship Available - Job Description - Our client are hiring a Site Reliability Engineering to join their Site Reliability Engineering group whose main objective is to ensure their services are consistently reliable for their customers. As part of adynamicand self-organizing team, you will have the opportunity to work with modern programming languages and manage software within public cloud environments. Our clients cross-functional teams cover the entire technology stack, from front ends to APIs and databases, providing the resources to build, deploy, and operate their own software. Responsibilities * Support applications in production, including responding to incidents and conducting post-incident reviews. * Apply observability engineering to proactively detect system degradation, understand system sta
        Job Title: Site Reliability Engineer - 12 Month Contract - No Sponsorship Available - Job Description - Our client are hiring a Site Reliability Engineering to join their Site Reliability Engineering group whose main objective is to ensure their services are consistently reliable for their customers. As part of adynamicand self-organizing team, you will have the opportunity to work with modern programming languages and manage software within public cloud environments. Our clients cross-functional teams cover the entire technology stack, from front ends to APIs and databases, providing the resources to build, deploy, and operate their own software. Responsibilities * Support applications in production, including responding to incidents and conducting post-incident reviews. * Apply observability engineering to proactively detect system degradation, understand system sta
        more
        PREMIUM
        AWS Date Engineer - Location: Radbroke (Hybrid - 2 days/week in office) 6 Months + Umbrella Only - Inside IR35 - About the Role - We are seeking a highly skilled and experienced Senior AWS Data & ML Engineer to join our team in Radbroke. This hybrid role offers the opportunity to work on cutting-edge machine learning and data engineering projects, leveraging the latest cloud technologies and MLOps practices. * ML Engineering * ML-Ops * ECS, Sagemaker * Gitlab * Jenkins * CI/CD * AI Lifecycle * Experience in front-end development (HTML, Stream-lit, Flask * Familiarity with model deployment and monitoring in cloud environments (AWS). * Understanding of machine learning lifecycle and data pipelines. * Proficiency with Python, Pyspark, Big-data ecosystems * Hands-on experience with MLOps tools (e.g., MLflow, Airflow, Docker, Kubernetes) Secondary Skills
        AWS Date Engineer - Location: Radbroke (Hybrid - 2 days/week in office) 6 Months + Umbrella Only - Inside IR35 - About the Role - We are seeking a highly skilled and experienced Senior AWS Data & ML Engineer to join our team in Radbroke. This hybrid role offers the opportunity to work on cutting-edge machine learning and data engineering projects, leveraging the latest cloud technologies and MLOps practices. * ML Engineering * ML-Ops * ECS, Sagemaker * Gitlab * Jenkins * CI/CD * AI Lifecycle * Experience in front-end development (HTML, Stream-lit, Flask * Familiarity with model deployment and monitoring in cloud environments (AWS). * Understanding of machine learning lifecycle and data pipelines. * Proficiency with Python, Pyspark, Big-data ecosystems * Hands-on experience with MLOps tools (e.g., MLflow, Airflow, Docker, Kubernetes) Secondary Skills
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        FEATURED
        Role: Contract Senior Backend Software Engineer - Node.js * Rate: c.£550 Outside IR35 Per day * Location: Leeds - Hybrid (2x days on site) * Length: 3-6 months - We are working with a growing, forward-thinking technology company dedicated to building scalable, reliable, and high-performing solutions for our customers. As a Senior Backend Software Engineer (Node.js), you will be responsible for designing, developing, and maintaining server-side applications and services. You'll work closely with cross-functional teams to ensure our systems are performant, secure, and deliver a great user experience. * Design, implement, and maintain backend services, APIs, and databases. * Collaborate with product managers, frontend engineers, and other stakeholders to deliver features end-to-end. * Ensure systems are scalable, reliable, and maintainable.
        Role: Contract Senior Backend Software Engineer - Node.js * Rate: c.£550 Outside IR35 Per day * Location: Leeds - Hybrid (2x days on site) * Length: 3-6 months - We are working with a growing, forward-thinking technology company dedicated to building scalable, reliable, and high-performing solutions for our customers. As a Senior Backend Software Engineer (Node.js), you will be responsible for designing, developing, and maintaining server-side applications and services. You'll work closely with cross-functional teams to ensure our systems are performant, secure, and deliver a great user experience. * Design, implement, and maintain backend services, APIs, and databases. * Collaborate with product managers, frontend engineers, and other stakeholders to deliver features end-to-end. * Ensure systems are scalable, reliable, and maintainable.
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        SuiteCRM Developer - Remote - Inside IR35

        The Bridge (IT Recruitment) Limited
        Greenwich, SE10 0AA
        £430 - 450 per day
        This is a fantastic opportunity to work as a contract SuiteCRM Developer on a remote contract, inside IR35. This SuiteCRM Developer will be asked to deliver customisation, integration, and ongoing support for their CRM platform. * SuiteCRM or SugarCRM * PHP * CRM databases * Git * APIs If you do have the relevant experience for this contract SuiteCRM Developer position, please do apply.
        This is a fantastic opportunity to work as a contract SuiteCRM Developer on a remote contract, inside IR35. This SuiteCRM Developer will be asked to deliver customisation, integration, and ongoing support for their CRM platform. * SuiteCRM or SugarCRM * PHP * CRM databases * Git * APIs If you do have the relevant experience for this contract SuiteCRM Developer position, please do apply.
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        JavaScript Developer

        Bright Purple Resourcing
        Scotland
        £400 - £450 (Outside IR35)
        Back End: REST Services: REST API, Node.js
        Back End: REST Services: REST API, Node.js
        NEW
        Configure and support Axway solutions, including API management and B2B gateway. * Working knowledge of Axway technologies, particularly API management and B2B gateway.
        Configure and support Axway solutions, including API management and B2B gateway. * Working knowledge of Axway technologies, particularly API management and B2B gateway.
        more
        NEWFEATURED

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        What is the average salary for API in UK?

        Average salary per year
        £57,499

        The average salary for a API in UK is £57,499. API in UK salaries range from £47,499 to £77,499.

        Frequently Asked Questions

        How many contract API jobs are there in UK?
        There are 319 contract API jobs within 20 miles of UK available on CWJobs right now.

        Where in UK are these contract jobs?
        You can find contract jobs in South East, North West, Midlands.

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