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Api
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0 Contract API jobs in Marsden Height + 20 miles
147 exact matches jobs are outside your preferred location
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API's
API's
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Hands-on experience with REST API design, TDD, and microservices
Hands-on experience with REST API design, TDD, and microservices
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oStrong knowledge and working experience with Retrofit for API integration.
oStrong knowledge and working experience with Retrofit for API integration.
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Knowledge of custom API's to leverage the SOAR's functionality
Knowledge of custom API's to leverage the SOAR's functionality
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Oversee and coordinate API integrations with HubSpot, finance systems, banking platforms, tenant portals, and BI tools. * Define test scripts for integrations (HubSpot sync, API data flows, reporting pipelines). * Hands-on experience managing API integrations and working with developers on system connectivity.
Oversee and coordinate API integrations with HubSpot, finance systems, banking platforms, tenant portals, and BI tools. * Define test scripts for integrations (HubSpot sync, API data flows, reporting pipelines). * Hands-on experience managing API integrations and working with developers on system connectivity.
NEWFEATURED
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Role: Contract Senior Software Engineer - Vue.js - Rate: Negotiable Outside IR35 per day - Location: Leeds - Hybrid (c. 2 days on site) Length: Initial 3 Months, likely to extend - We're partnering with a growing, forward-thinking technology consultancy dedicated to building scalable, reliable, and high-performing digital products that deliver exceptional user experiences. As a Senior Front-End Engineer, you'll play a key role in designing and developing high-quality user interfaces using Vue.js. You'll collaborate closely with designers, product managers, and backend engineers to create performant, maintainable, and visually engaging applications that drive the best possible outcomes for our customers. * Develop and maintain front-end applications using Vue.js (Vue 3 preferred) * Work closely with backend and design teams to deliver features end-to-end
Role: Contract Senior Software Engineer - Vue.js - Rate: Negotiable Outside IR35 per day - Location: Leeds - Hybrid (c. 2 days on site) Length: Initial 3 Months, likely to extend - We're partnering with a growing, forward-thinking technology consultancy dedicated to building scalable, reliable, and high-performing digital products that deliver exceptional user experiences. As a Senior Front-End Engineer, you'll play a key role in designing and developing high-quality user interfaces using Vue.js. You'll collaborate closely with designers, product managers, and backend engineers to create performant, maintainable, and visually engaging applications that drive the best possible outcomes for our customers. * Develop and maintain front-end applications using Vue.js (Vue 3 preferred) * Work closely with backend and design teams to deliver features end-to-end
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Location: Warton, full time on site (occasional travel to Reading HQ) Duration: 6-12 months - Hourly Rate: £50 PAYE or £67.47 Umbrella - Working Arrangements: Full time on site (occasional travel to Reading HQ) Reports To: Chris McShee - What You’ll Be Doing * Designing, developing, and maintaining robust, secure, and scalable data pipelines using Apache NiFi and related technologies. * Troubleshooting, optimising, and maintaining NiFi flows — addressing performance, error handling, and throughput challenges. * Integrating NiFi with cloud platforms, SQL/NoSQL databases, APIs, and third-party systems. * Ensuring data infrastructure adheres to strict security and compliance standards. * Supporting data migrations and implementing disaster recovery strategies. * Monitoring data infrastructure performance and recommending continual improvements.
Location: Warton, full time on site (occasional travel to Reading HQ) Duration: 6-12 months - Hourly Rate: £50 PAYE or £67.47 Umbrella - Working Arrangements: Full time on site (occasional travel to Reading HQ) Reports To: Chris McShee - What You’ll Be Doing * Designing, developing, and maintaining robust, secure, and scalable data pipelines using Apache NiFi and related technologies. * Troubleshooting, optimising, and maintaining NiFi flows — addressing performance, error handling, and throughput challenges. * Integrating NiFi with cloud platforms, SQL/NoSQL databases, APIs, and third-party systems. * Ensuring data infrastructure adheres to strict security and compliance standards. * Supporting data migrations and implementing disaster recovery strategies. * Monitoring data infrastructure performance and recommending continual improvements.
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Job Title: Penetration Tester - Location: Leeds (Hybrid; 4 days in office) Job Type: Contract (Inside IR35) Duration: 6 Months Job Summary: Join Tata Consultancy Services (TCS) as a Pen Tester and play a critical role in safeguarding some of the largest and most innovative clients in the UK and worldwide. You'll be part of a purpose-led transformation company, making a meaningful impact through challenging projects that demand ambitious innovation and thought leadership. * Lead client engagements from kickoff through to scoping, penetration testing, and reporting, ensuring delivery within agreed scope and deadlines. * Perform comprehensive penetration testing across networks, web applications, APIs, cloud security, thick client applications, wireless, social engineering, and physical environments.
Job Title: Penetration Tester - Location: Leeds (Hybrid; 4 days in office) Job Type: Contract (Inside IR35) Duration: 6 Months Job Summary: Join Tata Consultancy Services (TCS) as a Pen Tester and play a critical role in safeguarding some of the largest and most innovative clients in the UK and worldwide. You'll be part of a purpose-led transformation company, making a meaningful impact through challenging projects that demand ambitious innovation and thought leadership. * Lead client engagements from kickoff through to scoping, penetration testing, and reporting, ensuring delivery within agreed scope and deadlines. * Perform comprehensive penetration testing across networks, web applications, APIs, cloud security, thick client applications, wireless, social engineering, and physical environments.
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Job: Software Engineer - Company: BAE Systems - Hourly Rate: £55 PAYE or £74.26 Umbrella - Location: Preston 3 days per week on-site - Contract: 6-12 months (Opportunity to be extended) Working Hours: 37 hours per week * Design, develop, and maintain scalable APIs and backend services to facilitate data flow between systems. * Collaborate with data engineers, architects, and security teams to ensure secure, reliable, and performant data exchange. * Work across cloud and on-premises environments to support a hybrid infrastructure. * Build reusable and modular components with a focus on maintainability and performance. * Implement robust error handling, logging, and monitoring strategies for production-grade services. * 5 years+ experience in end-to-end projects * C# experience * .NET experience * Experience in RESTful APIs * ETL experience * Experience working within a
Job: Software Engineer - Company: BAE Systems - Hourly Rate: £55 PAYE or £74.26 Umbrella - Location: Preston 3 days per week on-site - Contract: 6-12 months (Opportunity to be extended) Working Hours: 37 hours per week * Design, develop, and maintain scalable APIs and backend services to facilitate data flow between systems. * Collaborate with data engineers, architects, and security teams to ensure secure, reliable, and performant data exchange. * Work across cloud and on-premises environments to support a hybrid infrastructure. * Build reusable and modular components with a focus on maintainability and performance. * Implement robust error handling, logging, and monitoring strategies for production-grade services. * 5 years+ experience in end-to-end projects * C# experience * .NET experience * Experience in RESTful APIs * ETL experience * Experience working within a
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DevOps Software Engineer - Outside IR35 | £550–£650 per day - Elevation Recruitment Group are partnering with a forward-thinking FinTech business who are changing how the financial services industry uses technology. They’re looking for an experienced DevOps Software Engineer to join their high-performing engineering team and play a key role in scaling cloud infrastructure and driving automation across the platform. This is an opportunity to work with cutting-edge tools and modern CI/CD practices in a fast-moving, collaborative environment where innovation is encouraged and ideas are heard. * Design, implement and maintain CI/CD pipelines for microservices and APIs * Support and optimise cloud infrastructure (AWS / Azure / GCP) * Build and manage containerised environments using Docker and Kubernetes * Collaborate closely with developers to streamline code deployment a
DevOps Software Engineer - Outside IR35 | £550–£650 per day - Elevation Recruitment Group are partnering with a forward-thinking FinTech business who are changing how the financial services industry uses technology. They’re looking for an experienced DevOps Software Engineer to join their high-performing engineering team and play a key role in scaling cloud infrastructure and driving automation across the platform. This is an opportunity to work with cutting-edge tools and modern CI/CD practices in a fast-moving, collaborative environment where innovation is encouraged and ideas are heard. * Design, implement and maintain CI/CD pipelines for microservices and APIs * Support and optimise cloud infrastructure (AWS / Azure / GCP) * Build and manage containerised environments using Docker and Kubernetes * Collaborate closely with developers to streamline code deployment a
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Role/Job Title: Collibra Developer - Work Location: Sheffield, UK (2 days) The focus is on creating connections between business processes, data, products, services, and technology, that underpin our interactions with customers and financial success. The Collibra team is based within the Group Data Management team established in March 2012, as part of an client-wide program to improve the management of data across the organization. * Ensure the Collibra (Group Data Dictionary tool) is available 24/7. * Implement new functionality or workflows on a need basis. * Fix application issues. * Optimize code if required. * Automate support tasks wherever possible. The Role - Seeking a Collibra Technical SME to design, implement, and optimize metadata management and data governance solutions using the Collibra platform.
Role/Job Title: Collibra Developer - Work Location: Sheffield, UK (2 days) The focus is on creating connections between business processes, data, products, services, and technology, that underpin our interactions with customers and financial success. The Collibra team is based within the Group Data Management team established in March 2012, as part of an client-wide program to improve the management of data across the organization. * Ensure the Collibra (Group Data Dictionary tool) is available 24/7. * Implement new functionality or workflows on a need basis. * Fix application issues. * Optimize code if required. * Automate support tasks wherever possible. The Role - Seeking a Collibra Technical SME to design, implement, and optimize metadata management and data governance solutions using the Collibra platform.
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£350-£400 per day (inside IR35) - 9 months+ All applicants must hold an active SC clearance. My client is a global leading IT consultancy. They are on the hunt for an SC Cleared Security Tester to join the current test team. Key Duties and Responsibilities * Strong capability to identify security gaps across systems and processes. * Experience creating and applying risk models. * Ability to develop and execute a comprehensive cyber security test strategy. * Strong understanding of Azure security risks, especially related to Azure Storage. * Knowledge of immutable backups and secure data retention strategies. * Experience with disaster recovery planning, including full restore testing. * Expertise in multi-factor authentication (MFA) setup and testing. * Vulnerability management - scanning, prioritisation, remediation validation.
£350-£400 per day (inside IR35) - 9 months+ All applicants must hold an active SC clearance. My client is a global leading IT consultancy. They are on the hunt for an SC Cleared Security Tester to join the current test team. Key Duties and Responsibilities * Strong capability to identify security gaps across systems and processes. * Experience creating and applying risk models. * Ability to develop and execute a comprehensive cyber security test strategy. * Strong understanding of Azure security risks, especially related to Azure Storage. * Knowledge of immutable backups and secure data retention strategies. * Experience with disaster recovery planning, including full restore testing. * Expertise in multi-factor authentication (MFA) setup and testing. * Vulnerability management - scanning, prioritisation, remediation validation.
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Security Tester - Contract (SC Cleared Hybrid Leeds Inside IR35)
Security Tester - Contract (SC Cleared Hybrid Leeds Inside IR35)
Exalto Consulting ltd
LS1, Leeds
£375p/d Inside IR35
Up to £375 per day (Inside IR35) Hybrid – two days per week on site in West Yorkshire - Initial contract until August 2026 - Active SC clearance required - Overview - We are seeking an experienced Security Tester to join an established testing team working on large scale, secure systems within the public sector. The role focuses on manual security testing, vulnerability management, and cyber resilience, supporting ongoing work around identity and access management and data protection. This is a hands on position where you will identify risks, validate security controls, and help deliver robust and resilient solutions. You will work closely with technical teams and contribute to improving the organisation’s overall security posture. Key Responsibilities * Identify and report security gaps across systems, applications and processes
Up to £375 per day (Inside IR35) Hybrid – two days per week on site in West Yorkshire - Initial contract until August 2026 - Active SC clearance required - Overview - We are seeking an experienced Security Tester to join an established testing team working on large scale, secure systems within the public sector. The role focuses on manual security testing, vulnerability management, and cyber resilience, supporting ongoing work around identity and access management and data protection. This is a hands on position where you will identify risks, validate security controls, and help deliver robust and resilient solutions. You will work closely with technical teams and contribute to improving the organisation’s overall security posture. Key Responsibilities * Identify and report security gaps across systems, applications and processes
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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Contract: Until end of 2025, rolling extensions - Inside IR35 - Were partnering with a leading financial services client in Sheffield who are seeking a Skilled Python Developer to join their team. Youll be instrumental in building scalable automation solutions to streamline and optimise database operations. This is a hybrid role (3 days per week in Sheffield), offering an initial contract until the end of the year with strong potential for rolling extensions. * Design, develop, and maintain automation solutions for database operations and rollouts * Build and integrate APIs for database management and automation workflows * Troubleshoot automation issues across scripting, APIs, and containerised environments * Proven experience in Python development & FastAPI * Strong knowledge of PostgreSQL database administration * Excellent problem-solving, debugging, and analytica
Contract: Until end of 2025, rolling extensions - Inside IR35 - Were partnering with a leading financial services client in Sheffield who are seeking a Skilled Python Developer to join their team. Youll be instrumental in building scalable automation solutions to streamline and optimise database operations. This is a hybrid role (3 days per week in Sheffield), offering an initial contract until the end of the year with strong potential for rolling extensions. * Design, develop, and maintain automation solutions for database operations and rollouts * Build and integrate APIs for database management and automation workflows * Troubleshoot automation issues across scripting, APIs, and containerised environments * Proven experience in Python development & FastAPI * Strong knowledge of PostgreSQL database administration * Excellent problem-solving, debugging, and analytica
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Job title: Senior Software Engineer - Location: Full Remote (Very occasional travel to offices in Cheshire) Type: Contract / Outside IR35 / 6 months initial duration + possible renewals ---------- About the Role - We’re looking for Senior Software Engineers to join our client's dynamic Engineering team and play a key role in building high-quality, scalable software solutions. As a senior member of the team, you’ll take ownership of full-stack development, contribute to software architecture, drive engineering best practices, and mentor junior team members. You’ll work closely with Product Owners, Architects, and DevOps to ensure delivery excellence across a diverse range of projects. What You'll Be Doing - Software Development * Build and maintain applications using C#, .NET Core, .NET 4.x, and React.js * Develop robust frontend solutions using ASP.Net MVC, HTML5, CSS
Job title: Senior Software Engineer - Location: Full Remote (Very occasional travel to offices in Cheshire) Type: Contract / Outside IR35 / 6 months initial duration + possible renewals ---------- About the Role - We’re looking for Senior Software Engineers to join our client's dynamic Engineering team and play a key role in building high-quality, scalable software solutions. As a senior member of the team, you’ll take ownership of full-stack development, contribute to software architecture, drive engineering best practices, and mentor junior team members. You’ll work closely with Product Owners, Architects, and DevOps to ensure delivery excellence across a diverse range of projects. What You'll Be Doing - Software Development * Build and maintain applications using C#, .NET Core, .NET 4.x, and React.js * Develop robust frontend solutions using ASP.Net MVC, HTML5, CSS
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Familiarity with modern architectural patterns (e.g. microservices, event-driven, API-first).
Familiarity with modern architectural patterns (e.g. microservices, event-driven, API-first).
FEATURED
Conduct API testing with tools such as Postman, and validate data using SQL queries.
Conduct API testing with tools such as Postman, and validate data using SQL queries.
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Design, develop and maintain highly available, secure, and performant backend REST API services along with frontend client usingPython,Golang, DockerandCloud-Native services. * Building RESTful API Services.
Design, develop and maintain highly available, secure, and performant backend REST API services along with frontend client usingPython,Golang, DockerandCloud-Native services. * Building RESTful API Services.
Vice President, Full-Stack Engineer
Vice President, Full-Stack Engineer
The Bank of New York Mellon
Manchester, Greater Manchester
Competitive
In-depth knowledge of REST API principles, HTTP protocol
In-depth knowledge of REST API principles, HTTP protocol
Role Senior Technology Architect Technology Liferay, Java, Spring, REST API Location Leeds Job Description At Infosys, we assure that your career will never stand still, we will inspire you to build whats next and we will navigate further together. * Experience in using API gateway for backend data / services integration to Liferay portal.
Role Senior Technology Architect Technology Liferay, Java, Spring, REST API Location Leeds Job Description At Infosys, we assure that your career will never stand still, we will inspire you to build whats next and we will navigate further together. * Experience in using API gateway for backend data / services integration to Liferay portal.
Assist with the creation of, and input into, API documentation used to persist data from the applications
Assist with the creation of, and input into, API documentation used to persist data from the applications
Data Protection Automation Engineer - Sheffield based
Data Protection Automation Engineer - Sheffield based
VantagePoint
Sheffield, South Yorkshire
Competitive
Proficient in designing, developing, and testing Rest API services. * Proficient in using third-party API services and understanding how/where to locate their capability.
Proficient in designing, developing, and testing Rest API services. * Proficient in using third-party API services and understanding how/where to locate their capability.
API Integration: Implement well-documented, testable APIs that enable seamless platform integration.
API Integration: Implement well-documented, testable APIs that enable seamless platform integration.
Solid understanding of API design, performance optimization, and data modeling.
Solid understanding of API design, performance optimization, and data modeling.