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7 Contract API jobs in Leicestershire + 20 miles
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API and event-driven architectures
API and event-driven architectures
API and event-driven architecture
API and event-driven architecture
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Contract Java Full Stack Developer
Contract Java Full Stack Developer
Spectrum It Recruitment Limited
Nottingham (NG1)
£375.00 - £400.00 per day
Rate: £375-£400 per day - IR35: Inside IR35 - Duration: 6 months - Location: Fully remote working - An exciting opportunity has arisen for an experienced contract Java Full Stack Developer to join a large-scale digital transformation programme focused on modernising and enhancing a complex enterprise platform. The contract Java Full Stack Developer will work within an agile development team, you'll contribute to the ongoing support and evolution of a business-critical application suite while helping to shape the next generation SaaS solutions. This is an excellent opportunity for someone who enjoys working on challenging technical problems, modern architectures, and platform transformation. Key Responsibilities * Design, develop and maintain scalable full stack applications. * Build and enhance RESTful APIs and web-based services.
Rate: £375-£400 per day - IR35: Inside IR35 - Duration: 6 months - Location: Fully remote working - An exciting opportunity has arisen for an experienced contract Java Full Stack Developer to join a large-scale digital transformation programme focused on modernising and enhancing a complex enterprise platform. The contract Java Full Stack Developer will work within an agile development team, you'll contribute to the ongoing support and evolution of a business-critical application suite while helping to shape the next generation SaaS solutions. This is an excellent opportunity for someone who enjoys working on challenging technical problems, modern architectures, and platform transformation. Key Responsibilities * Design, develop and maintain scalable full stack applications. * Build and enhance RESTful APIs and web-based services.
Designing integration processes (CDI/API) using best practices across platforms such as SAP, Snowflake, Adobe, Salesforce, and Mulesoft * Strong experience designing and developing API using Informatica CAI.
Designing integration processes (CDI/API) using best practices across platforms such as SAP, Snowflake, Adobe, Salesforce, and Mulesoft * Strong experience designing and developing API using Informatica CAI.
Senior Software Development Engineer - Shared Platforms
Senior Software Development Engineer - Shared Platforms
Capital One (Europe) plc
Nottingham, Nottinghamshire
Competitive
Work in a cross-functional engineering team to design, enable and develop software features that support the UK API Gateway * Bonus: experience with procedural languages (e.g. Lua/Go) and/or writing API plugins
Work in a cross-functional engineering team to design, enable and develop software features that support the UK API Gateway * Bonus: experience with procedural languages (e.g. Lua/Go) and/or writing API plugins
We provide a comprehensive range of currency services and products, including our Currency Converter, Market Analysis, Currency Data API and quick, easy, secure Money Transfers for individuals and businesses.
We provide a comprehensive range of currency services and products, including our Currency Converter, Market Analysis, Currency Data API and quick, easy, secure Money Transfers for individuals and businesses.
Perform API testing using Postman and database testing using SQL Server. * API testing experience using Postman.
Perform API testing using Postman and database testing using SQL Server. * API testing experience using Postman.
NEW
6 exact matches jobs are outside your preferred location
This role combines software engineering, systems architecture, API development, data mapping, automation, and technical problem-solving. The goal is to identify the most effective onboarding approach for each seller, whether that involves API connectivity, bulk uploads, existing integrations, middleware solutions, or building reusable integrations where there is long-term value. Seller API Supporting businesses and developers who wish to integrate directly with the ifndautoparts Seller API. This may include existing integrations, custom-built integrations, data feeds, middleware solutions, or direct API connectivity depending on the seller's requirements. * Utilise and extend the ifndautoparts Seller API to support business seller onboarding and inventory synchronisation. * Assist external developers and technical contacts in integrating with the ifndautoparts API.
This role combines software engineering, systems architecture, API development, data mapping, automation, and technical problem-solving. The goal is to identify the most effective onboarding approach for each seller, whether that involves API connectivity, bulk uploads, existing integrations, middleware solutions, or building reusable integrations where there is long-term value. Seller API Supporting businesses and developers who wish to integrate directly with the ifndautoparts Seller API. This may include existing integrations, custom-built integrations, data feeds, middleware solutions, or direct API connectivity depending on the seller's requirements. * Utilise and extend the ifndautoparts Seller API to support business seller onboarding and inventory synchronisation. * Assist external developers and technical contacts in integrating with the ifndautoparts API.
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Elevation Recruitment Group are working with a growing business on an exciting fixed-term engagement to support the optimisation and rollout of its core platforms Oracle NetSuite. This is a hands-on role sitting at the intersection of IT and business operations, working closely with Finance, Sales, Operations and Account Management to make sure these systems are configured, stable, and embedded for the long term. * Administering and optimise NetSuite across modules including SA, GL, AR, AP, FAM, CRM, WMS, Projects and more * Conduct structured process reviews with business teams and translate requirements into system design and configuration * Build and maintain dashboards, saved searches, and reports that drive genuine business insight * Support ETL activities and oversee integrations with internal and third-party platforms
Elevation Recruitment Group are working with a growing business on an exciting fixed-term engagement to support the optimisation and rollout of its core platforms Oracle NetSuite. This is a hands-on role sitting at the intersection of IT and business operations, working closely with Finance, Sales, Operations and Account Management to make sure these systems are configured, stable, and embedded for the long term. * Administering and optimise NetSuite across modules including SA, GL, AR, AP, FAM, CRM, WMS, Projects and more * Conduct structured process reviews with business teams and translate requirements into system design and configuration * Build and maintain dashboards, saved searches, and reports that drive genuine business insight * Support ETL activities and oversee integrations with internal and third-party platforms
FEATURED
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The ideal candidate will be an experienced Python developer with a strong understanding of modern backend engineering principles, cloud-native development, and API design.
The ideal candidate will be an experienced Python developer with a strong understanding of modern backend engineering principles, cloud-native development, and API design.
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API and systems integration experience
API and systems integration experience
NEWFEATURED
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Software Engineer & Cloud Operations Specialist - Node, AWS.
Software Engineer & Cloud Operations Specialist - Node, AWS.
S Merrick LTD
Europe
Unspecified Daily Rate Negotiable - Outside IR35
You must have strong hands-on production Node.js and Python API development experience. * Frequent/daily Node.js backend/API development * Production Python API development, ideally Flask or FastAPI - Please only apply if you can commit to 24 hours per week and your CV clearly demonstrates production Node.js, Python API, AWS infrastructure, Docker and Ansible experience.
You must have strong hands-on production Node.js and Python API development experience. * Frequent/daily Node.js backend/API development * Production Python API development, ideally Flask or FastAPI - Please only apply if you can commit to 24 hours per week and your CV clearly demonstrates production Node.js, Python API, AWS infrastructure, Docker and Ansible experience.
Software Engineer & Cloud Operations Specialist - Node, AWS
Software Engineer & Cloud Operations Specialist - Node, AWS
S Merrick LTD
UK
Unspecified Daily Rate Negotiable - Outside IR35
You must have strong hands-on production Node.js and Python API development experience. * Frequent/daily Node.js backend/API development * Production Python API development, ideally Flask or FastAPI - Please only apply if you can commit to 24 hours per week and your CV clearly demonstrates production Node.js, Python API, AWS infrastructure, Docker and Ansible experience.
You must have strong hands-on production Node.js and Python API development experience. * Frequent/daily Node.js backend/API development * Production Python API development, ideally Flask or FastAPI - Please only apply if you can commit to 24 hours per week and your CV clearly demonstrates production Node.js, Python API, AWS infrastructure, Docker and Ansible experience.
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We are looking to recruit an SC Cleared Technical Architect for a leading technology consultancy. * Strong experience as a Technical Architect within complex environments - Skills: Technical Architecture, Azure/AWS, DevOps, Secure Development, Microservices, APIs, SC Clearance - This is a high-impact role, working across the full delivery lifecycle to design and deliver complex, secure, and scalable solutions aligned to business and technical strategy. * Own the technical design of large and complex systems * Provide architecture governance and technical leadership across delivery teams * Collaborate with multi-disciplinary teams to ensure solutions meet business and technical needs - Permanent - Location: Home / Andover (onsite 2 days a week) Salary: £100,000 - £120,000 (+ benefits) Location: Andover (2 days per week onsite) Clearance: Active SC required - Key Responsibilities
We are looking to recruit an SC Cleared Technical Architect for a leading technology consultancy. * Strong experience as a Technical Architect within complex environments - Skills: Technical Architecture, Azure/AWS, DevOps, Secure Development, Microservices, APIs, SC Clearance - This is a high-impact role, working across the full delivery lifecycle to design and deliver complex, secure, and scalable solutions aligned to business and technical strategy. * Own the technical design of large and complex systems * Provide architecture governance and technical leadership across delivery teams * Collaborate with multi-disciplinary teams to ensure solutions meet business and technical needs - Permanent - Location: Home / Andover (onsite 2 days a week) Salary: £100,000 - £120,000 (+ benefits) Location: Andover (2 days per week onsite) Clearance: Active SC required - Key Responsibilities
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Within your role as a Lead Engineer, no two days will look the same; with a variety of projects, theres always something new to learn. You will be joining an already established and talented team, comprised of Graduate Engineers through to Solution Architects helping to enhance existing and develop new products! When your groceries arrive at your door or you sign for your online parcel, one or more of our software, telematics or proof-of-purchase solutions has probably been used. When registering to this job board you will be redirected to the online application form. Please ensure that this is completed in full in order that your application can be reviewed. You will be provided a clear, individual career path with full training, support and mentorship as required to ensure you are reaching your full potential and mastering your field.
Within your role as a Lead Engineer, no two days will look the same; with a variety of projects, theres always something new to learn. You will be joining an already established and talented team, comprised of Graduate Engineers through to Solution Architects helping to enhance existing and develop new products! When your groceries arrive at your door or you sign for your online parcel, one or more of our software, telematics or proof-of-purchase solutions has probably been used. When registering to this job board you will be redirected to the online application form. Please ensure that this is completed in full in order that your application can be reviewed. You will be provided a clear, individual career path with full training, support and mentorship as required to ensure you are reaching your full potential and mastering your field.
PREMIUM
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Software Development Specialist / Professional - We are seeking engineers with strong IT and engineering skills to build, design, and secure modern technology platforms. You will work in a software-defined, automation-first environment to iterate fast and deploy at pace. * Own and deliver automated engineering platform capabilities in a CI/CD environment. * Support engineering teams, remove manual tasks, and improve platform reliability. * Location: London, Cheltenham, Ipswich, or Manchester (Onsite) * Hours: 37.5 hours per week * Clearance Requirement: Active DV (Developed Vetting) clearance is mandatory. About the Role - Multiple roles are available across different seniority levels. Key Responsibilities * Design and evolve CI/CD pipelines and embed Infrastructure-as-Code (IaC). * Integrate security controls into workflows so services are secure by design. * Collaborate across development, security, and operations teams.
Software Development Specialist / Professional - We are seeking engineers with strong IT and engineering skills to build, design, and secure modern technology platforms. You will work in a software-defined, automation-first environment to iterate fast and deploy at pace. * Own and deliver automated engineering platform capabilities in a CI/CD environment. * Support engineering teams, remove manual tasks, and improve platform reliability. * Location: London, Cheltenham, Ipswich, or Manchester (Onsite) * Hours: 37.5 hours per week * Clearance Requirement: Active DV (Developed Vetting) clearance is mandatory. About the Role - Multiple roles are available across different seniority levels. Key Responsibilities * Design and evolve CI/CD pipelines and embed Infrastructure-as-Code (IaC). * Integrate security controls into workflows so services are secure by design. * Collaborate across development, security, and operations teams.
FEATURED
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Theyre looking for Java Engineers to join their implementation team. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid junior jnr - Youll play a key part in defining technical standards, optimising runtime performance, and mentoring less- experienced engineers in workflow-centric delivery. Implement and integrate Java-based microservices, APIs, and connectors within orchestration flows
Theyre looking for Java Engineers to join their implementation team. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid junior jnr - Youll play a key part in defining technical standards, optimising runtime performance, and mentoring less- experienced engineers in workflow-centric delivery. Implement and integrate Java-based microservices, APIs, and connectors within orchestration flows
NEW
We are looking for a Senior AI Engineer to design, build, and deploy production-ready GenAI applications and multi-agent systems within secure environments. This role requires a strong hybrid of advanced AI orchestration and robust cloud-native engineering, specifically focusing on scaling workloads via Kubernetes. * Kubernetes Orchestration: Containerize, deploy, and scale AI models, APIs, and microservices across production Kubernetes (K8s) clusters. * Rate: £700 / day * IR35 Status: Outside IR35 * Duration: 6 months (with high likelihood of extension) * Location: Hybrid / Remote options available (UK-based) * Security Clearance: DV Cleared - The Role - Because of the nature of this work, you must hold active UK Developed Vetting (DV) security clearance to be considered. Key Responsibilities * Agentic Workflows: Design, implement, and optimize multi-agent frameworks and stateful LLM applications.
We are looking for a Senior AI Engineer to design, build, and deploy production-ready GenAI applications and multi-agent systems within secure environments. This role requires a strong hybrid of advanced AI orchestration and robust cloud-native engineering, specifically focusing on scaling workloads via Kubernetes. * Kubernetes Orchestration: Containerize, deploy, and scale AI models, APIs, and microservices across production Kubernetes (K8s) clusters. * Rate: £700 / day * IR35 Status: Outside IR35 * Duration: 6 months (with high likelihood of extension) * Location: Hybrid / Remote options available (UK-based) * Security Clearance: DV Cleared - The Role - Because of the nature of this work, you must hold active UK Developed Vetting (DV) security clearance to be considered. Key Responsibilities * Agentic Workflows: Design, implement, and optimize multi-agent frameworks and stateful LLM applications.
FEATURED
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You will design and maintain the cloud environments, CI/CD workflows, and observability systems that enable our engineers to ship with confidence. - Develop backend systems and APIs that integrate AI into our SaaS platform Location: Remote (Occasional travel to their London office) Contract: Inside IR35 - Day rate: Up to £800 per day - Duration: 6 months - Start date: ASAP - Key words: Azure, Terraform, containerization, CI/CD - As part of our Client's AI Engineering team, you will own the infrastructure and delivery pipelines that keep our AI-driven products reliable, scalable, and fast. - Strong experience with Azure cloud services (compute, networking, storage, identity) - Proficiency with Infrastructure as Code (Terraform) - Solid experience building and maintaining CI/CD pipelines (GitHub Actions) - Hands-on experience with container orchestration (Kubernetes, Docker)
You will design and maintain the cloud environments, CI/CD workflows, and observability systems that enable our engineers to ship with confidence. - Develop backend systems and APIs that integrate AI into our SaaS platform Location: Remote (Occasional travel to their London office) Contract: Inside IR35 - Day rate: Up to £800 per day - Duration: 6 months - Start date: ASAP - Key words: Azure, Terraform, containerization, CI/CD - As part of our Client's AI Engineering team, you will own the infrastructure and delivery pipelines that keep our AI-driven products reliable, scalable, and fast. - Strong experience with Azure cloud services (compute, networking, storage, identity) - Proficiency with Infrastructure as Code (Terraform) - Solid experience building and maintaining CI/CD pipelines (GitHub Actions) - Hands-on experience with container orchestration (Kubernetes, Docker)
PREMIUM
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VIQU have partnered with an NHS organisation who are looking for a DevOps Engineer to support the development and improvement of their Azure-based platform and application delivery environment. This is a hands on DevOps Engineer role, working across CI/CD, automation and cloud platform configuration, with a strong emphasis on Microsoft technologies, including Power Platform and .NET-based applications. The successful DevOps Engineer will play a key role in improving deployment processes, platform reliability and application lifecycle management across a modern cloud environment. * Role: DevOps Engineer * Contribute to platform improvements, automation initiatives and DevOps best practices across the team * Experience working in modern DevOps environments, with a focus on automation, reliability and continuous delivery - Responsibilities
VIQU have partnered with an NHS organisation who are looking for a DevOps Engineer to support the development and improvement of their Azure-based platform and application delivery environment. This is a hands on DevOps Engineer role, working across CI/CD, automation and cloud platform configuration, with a strong emphasis on Microsoft technologies, including Power Platform and .NET-based applications. The successful DevOps Engineer will play a key role in improving deployment processes, platform reliability and application lifecycle management across a modern cloud environment. * Role: DevOps Engineer * Contribute to platform improvements, automation initiatives and DevOps best practices across the team * Experience working in modern DevOps environments, with a focus on automation, reliability and continuous delivery - Responsibilities
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You will be working in Scrum teams alongside Java Engineers, Frontend Developers and QEs to modernise legacy services into scalable, cloud-aligned platforms. Lead the design and development of backend services using Java and Spring Boot. Drive modernisation and refactoring of legacy Java services. Java, Spring Boot, JUnit, Kubernetes. Role Summary - This is a hands-on technical leadership role with responsibility for design, code quality, and mentoring. Key Responsibilities - Define and uphold coding standards, architectural patterns, and best practices. Ensure strong test coverage using JUnit and Mockito. Support containerised deployments in Kubernetes environments. Review pull requests and provide technical leadership across the team. Collaborate with product, frontend, and QA to ensure quality delivery. Required Skills - Desirable Skills
You will be working in Scrum teams alongside Java Engineers, Frontend Developers and QEs to modernise legacy services into scalable, cloud-aligned platforms. Lead the design and development of backend services using Java and Spring Boot. Drive modernisation and refactoring of legacy Java services. Java, Spring Boot, JUnit, Kubernetes. Role Summary - This is a hands-on technical leadership role with responsibility for design, code quality, and mentoring. Key Responsibilities - Define and uphold coding standards, architectural patterns, and best practices. Ensure strong test coverage using JUnit and Mockito. Support containerised deployments in Kubernetes environments. Review pull requests and provide technical leadership across the team. Collaborate with product, frontend, and QA to ensure quality delivery. Required Skills - Desirable Skills
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As a Lead Data Platform Engineer, you will help lead the development of backend services for a government client leveraging the latest commercial and open-source technologies. Aker Systems was founded in 2017 by a team of experienced technology professionals who recognised an opportunity to provide highly secure enterprise data platforms to large organisations. We build and operate ground-breaking, ultra-secure, high performance, cloud-based data infrastructure for the enterprise. Our proprietary technology solutions drive performance and reduce costs while helping our clients to improve the management and sharing of data across their organisations. * Collaborate closely with other engineers in our cross-functional feature teams; ensuring that others can cover for you, and that you can cover for them * Experience with Kafka or a similar platform. * Experience in Big Data technologies
As a Lead Data Platform Engineer, you will help lead the development of backend services for a government client leveraging the latest commercial and open-source technologies. Aker Systems was founded in 2017 by a team of experienced technology professionals who recognised an opportunity to provide highly secure enterprise data platforms to large organisations. We build and operate ground-breaking, ultra-secure, high performance, cloud-based data infrastructure for the enterprise. Our proprietary technology solutions drive performance and reduce costs while helping our clients to improve the management and sharing of data across their organisations. * Collaborate closely with other engineers in our cross-functional feature teams; ensuring that others can cover for you, and that you can cover for them * Experience with Kafka or a similar platform. * Experience in Big Data technologies
PREMIUM
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Lead Software Engineer, Senior Software Engineer, Python Developer, Django Developer, Backend Engineer, Full Stack Engineer, Software Architect, GDS, Agile, System Design, Government, Public Sector, Defence, Export Control, London, Manchester, Birmingham, Cardiff, North East, Hybrid, Contract, Inside IR35 - We're looking for a Lead Software Engineer for a public sector organisation based in London, Manchester, Birmingham, Cardiff or the North East (hybrid) on an initial 12-month contract, paying up to £750 per day (Inside IR35, Umbrella). The successful Lead Software Engineer will lead the design, development, and delivery of scalable, secure software solutions within a government-focused environment, contributing to services that support the regulation of controlled goods and exports. - Python and Django development to a senior or lead level
Lead Software Engineer, Senior Software Engineer, Python Developer, Django Developer, Backend Engineer, Full Stack Engineer, Software Architect, GDS, Agile, System Design, Government, Public Sector, Defence, Export Control, London, Manchester, Birmingham, Cardiff, North East, Hybrid, Contract, Inside IR35 - We're looking for a Lead Software Engineer for a public sector organisation based in London, Manchester, Birmingham, Cardiff or the North East (hybrid) on an initial 12-month contract, paying up to £750 per day (Inside IR35, Umbrella). The successful Lead Software Engineer will lead the design, development, and delivery of scalable, secure software solutions within a government-focused environment, contributing to services that support the regulation of controlled goods and exports. - Python and Django development to a senior or lead level
As a Data Engineer, you will assist in the development of a secure batch/real-time data platform for a government client leveraging the latest commercial and open-source technologies. Aker Systems was founded in 2017 by a team of experienced technology professionals who recognised an opportunity to provide highly secure enterprise data platforms to large organisations. We build and operate ground-breaking, ultra-secure, high performance, cloud-based data infrastructure for the enterprise. Our proprietary technology solutions drive performance and reduce costs while helping our clients to improve the management and sharing of data across their organisations. This involves getting data from a variety of different sources, getting it into the right format, assuring alignment to target models, and ensuring that data can be made available to downstream consumers.
As a Data Engineer, you will assist in the development of a secure batch/real-time data platform for a government client leveraging the latest commercial and open-source technologies. Aker Systems was founded in 2017 by a team of experienced technology professionals who recognised an opportunity to provide highly secure enterprise data platforms to large organisations. We build and operate ground-breaking, ultra-secure, high performance, cloud-based data infrastructure for the enterprise. Our proprietary technology solutions drive performance and reduce costs while helping our clients to improve the management and sharing of data across their organisations. This involves getting data from a variety of different sources, getting it into the right format, assuring alignment to target models, and ensuring that data can be made available to downstream consumers.
PREMIUM
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C / C++ Software Engineer
C / C++ Software Engineer
Certain Advantage
Stevenage, Hertfordshire, SG1 2DA
£65 per hour, Benefits Overtime Rate
World Class Defence Organisation based in Stevenage is currently looking to recruit 2x Software Engineer subcontractors on an initial 12 month contract, with very likely extension. * Strong ability to write software in C / C++; scripting languages would be an advantage to our future direction. You will be responsible for designing and developing Test equipment software to test the world leading and Complex missile systems and sub-components. * Designing and developing Test Equipment software to test world leading complex missile systems and sub-components; * Working with a wide range of teams and stakeholders to deliver test software capability of products from early concept to production; * Challenging and implementing real change when opportunities arise in the way the software is developed both within test software and the wider software community
World Class Defence Organisation based in Stevenage is currently looking to recruit 2x Software Engineer subcontractors on an initial 12 month contract, with very likely extension. * Strong ability to write software in C / C++; scripting languages would be an advantage to our future direction. You will be responsible for designing and developing Test equipment software to test the world leading and Complex missile systems and sub-components. * Designing and developing Test Equipment software to test world leading complex missile systems and sub-components; * Working with a wide range of teams and stakeholders to deliver test software capability of products from early concept to production; * Challenging and implementing real change when opportunities arise in the way the software is developed both within test software and the wider software community