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        17 Contract API jobs in Belfast + 10 miles

        Senior Software Engineer - BETS

        CME Group
        Belfast, County Antrim
        Competitive
        Sr Software Engineer - BETS CME Technology and Support Services is relentlessly focused on developing the worlds most advanced electronic trading, post trade processing and risk management systems. We are the worlds leading and most diverse derivatives market place providing risk management solutions that help drive the global economy. Our customers include leading investment and commercial banks, hedge funds, proprietary trading firms, pension funds, sovereign wealth funds, asset managers, corporations, and individual traders. The selected candidate will join the CME Engineering and Execution team in Belfast, as a Senior Software Engineer on the BrokerTec Back End Trading Services Team. The Belfast team is a high performing group of individuals that deliver on a broad range of functions including systems/business analysis, software development and quality assurance .
        Sr Software Engineer - BETS CME Technology and Support Services is relentlessly focused on developing the worlds most advanced electronic trading, post trade processing and risk management systems. We are the worlds leading and most diverse derivatives market place providing risk management solutions that help drive the global economy. Our customers include leading investment and commercial banks, hedge funds, proprietary trading firms, pension funds, sovereign wealth funds, asset managers, corporations, and individual traders. The selected candidate will join the CME Engineering and Execution team in Belfast, as a Senior Software Engineer on the BrokerTec Back End Trading Services Team. The Belfast team is a high performing group of individuals that deliver on a broad range of functions including systems/business analysis, software development and quality assurance .
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        Software Engineer Financial Services Technology - Are you an ambitious software engineer eager to work with cutting-edge technologies in financial services? Do you thrive in collaborative teams where learning, innovation, and delivery go hand in hand? If so, this role could be the perfect next step for you. About the Role - Our client, a leading global financial services institution, is building a new platform using the latest technologies and modern architecture. As a Software Engineer , you will join a newly formed team working closely with AWS experts and senior engineers. Youll contribute to the design, development, and testing of software, while gaining exposure to cloud-native practices and engineering excellence. This is a fantastic opportunity to grow your skills while helping shape the next generation of the organisations technology landscape. Key Responsibil
        Software Engineer Financial Services Technology - Are you an ambitious software engineer eager to work with cutting-edge technologies in financial services? Do you thrive in collaborative teams where learning, innovation, and delivery go hand in hand? If so, this role could be the perfect next step for you. About the Role - Our client, a leading global financial services institution, is building a new platform using the latest technologies and modern architecture. As a Software Engineer , you will join a newly formed team working closely with AWS experts and senior engineers. Youll contribute to the design, development, and testing of software, while gaining exposure to cloud-native practices and engineering excellence. This is a fantastic opportunity to grow your skills while helping shape the next generation of the organisations technology landscape. Key Responsibil
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        You will be a quality advocate and will drive automation-first practices, with a strong focus on API testing . Lead API, UI, and performance testing within CI/CD pipelines.
        You will be a quality advocate and will drive automation-first practices, with a strong focus on API testing . Lead API, UI, and performance testing within CI/CD pipelines.
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        Foods Connected is a cloud based software platform that helps retailers and food companies across the world manage their supply chain, quality control and trading and planning management. As a team, we provide tools that help our customers manage their processes in a fast and efficient way and provide real-time visibility and reporting on what is happening in their business. At Foods Connected, we recognise that our employees are our most important asset and we value creating a great working environment to ensure our team enjoy working together and solving problems for our customers. Whether we are in the middle of a fast and intense development sprint, on a Teams call discussing our project statuses or enjoying a game of ping-pong or pool in the office, it is important to us that our employees are happy and delivering the best possible result for our customers.
        Foods Connected is a cloud based software platform that helps retailers and food companies across the world manage their supply chain, quality control and trading and planning management. As a team, we provide tools that help our customers manage their processes in a fast and efficient way and provide real-time visibility and reporting on what is happening in their business. At Foods Connected, we recognise that our employees are our most important asset and we value creating a great working environment to ensure our team enjoy working together and solving problems for our customers. Whether we are in the middle of a fast and intense development sprint, on a Teams call discussing our project statuses or enjoying a game of ping-pong or pool in the office, it is important to us that our employees are happy and delivering the best possible result for our customers.
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        NEW
        We are seeking innovative Frontend/API Developers proficient in React, TypeScript, GraphQL, to build user-friendly interfaces and efficient APIs for engagement with our AWS Data Lake. * Develop intuitive, scalable front-end applications using React and Typescript, integrated with API frameworks * Design and build efficient API solutions using GraphQL, ensuring seamless access to data lake resources * Optimize API performance for efficient real-time querying * Strong knowledge of GraphQL API development and query optimization
        We are seeking innovative Frontend/API Developers proficient in React, TypeScript, GraphQL, to build user-friendly interfaces and efficient APIs for engagement with our AWS Data Lake. * Develop intuitive, scalable front-end applications using React and Typescript, integrated with API frameworks * Design and build efficient API solutions using GraphQL, ensuring seamless access to data lake resources * Optimize API performance for efficient real-time querying * Strong knowledge of GraphQL API development and query optimization
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        As a Staff Software Engineer, youll be driving and proposing strategies around complex and unique technical problems affecting our core platform and business needs. You'll be instrumental in communicating technical standards and gaining buy-in on solutions across engineering teams. By serving as an expert and owner in multiple areas of the codebase, you will successfully deliver the architecture and execution of major platform components from conception to release. About the Team - Our Platform Foundations team is responsible for building and maintaining the robust, scalable, and resilient infrastructure that underpins all of our products and services. We provide the essential building blocks, services, and tooling that empower development teams across the organisation to deliver high-quality, high-performance solutions to our customers.
        As a Staff Software Engineer, youll be driving and proposing strategies around complex and unique technical problems affecting our core platform and business needs. You'll be instrumental in communicating technical standards and gaining buy-in on solutions across engineering teams. By serving as an expert and owner in multiple areas of the codebase, you will successfully deliver the architecture and execution of major platform components from conception to release. About the Team - Our Platform Foundations team is responsible for building and maintaining the robust, scalable, and resilient infrastructure that underpins all of our products and services. We provide the essential building blocks, services, and tooling that empower development teams across the organisation to deliver high-quality, high-performance solutions to our customers.
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        About Behavox - Behavox is shaping the future for how businesses harness their most important raw material - data. Our mission is bold: Organize enterprise data into actionable information that protects and promotes the business growth of multinational companies around the world. From managing enterprise risk and compliance to maximizing revenue and value, our data operating platform presents a widespread opportunity to build multilingual, AI/ML-based solutions that activate data for every function within a global enterprise. Our approach is unique, and it's validated by our customers who tell us to keep forging ahead because no one else is aggregating, analyzing, and acting on data to uncover opportunities or solve problems quite the way we are. We are looking for fearless innovators who have an insatiable appetite for building what no one has built before. About the
        About Behavox - Behavox is shaping the future for how businesses harness their most important raw material - data. Our mission is bold: Organize enterprise data into actionable information that protects and promotes the business growth of multinational companies around the world. From managing enterprise risk and compliance to maximizing revenue and value, our data operating platform presents a widespread opportunity to build multilingual, AI/ML-based solutions that activate data for every function within a global enterprise. Our approach is unique, and it's validated by our customers who tell us to keep forging ahead because no one else is aggregating, analyzing, and acting on data to uncover opportunities or solve problems quite the way we are. We are looking for fearless innovators who have an insatiable appetite for building what no one has built before. About the
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        The selected candidate will join the Data Services Domain within Technology in Belfast as a Staff Software Engineer, initially supporting the CME Benchmark Administration Business. You will be part of the Benchmark & Indices Pod. This role will be instrumental in designing, developing, and maintaining the systems and tools used for the accurate calculation, administration, and governance of CME Group's proprietary financial benchmarks as administered by CME Benchmark Administration. The successful candidate will leverage their technical expertise to enhance operational efficiency, ensure data integrity, and support compliance with regulatory requirements and industry best practices. Essential Criteria * Bachelor's degree (with honors) or equivalent/better strongly preferred, but substantial relevant experience could substitute
        The selected candidate will join the Data Services Domain within Technology in Belfast as a Staff Software Engineer, initially supporting the CME Benchmark Administration Business. You will be part of the Benchmark & Indices Pod. This role will be instrumental in designing, developing, and maintaining the systems and tools used for the accurate calculation, administration, and governance of CME Group's proprietary financial benchmarks as administered by CME Benchmark Administration. The successful candidate will leverage their technical expertise to enhance operational efficiency, ensure data integrity, and support compliance with regulatory requirements and industry best practices. Essential Criteria * Bachelor's degree (with honors) or equivalent/better strongly preferred, but substantial relevant experience could substitute
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        As a Salesforce Solutions Architect, you will lead design and delivery of scalable Salesforce solutions, ensuring alignment with customer needs. Responsibilities include overseeing integrations, defining best practices, and providing technical guidance to teams. As a Lead Solutions Architect, you'll design Salesforce solutions, oversee integrations, define best practices, and lead cross-functional collaboration. Top Skills: Data Privacy RegulationsIntegration SystemsSalesforceArtificial Intelligence Marketing Tech Software ConsultingThe Salesforce B2B Solution Architect leads technical teams to develop enterprise Salesforce solutions, manages client engagements, and ensures project success. Top Skills: CSSExperience CloudHTMLLightning FrameworkOmsRest ApisSalesforceSalesforce B2B CommerceSalesforce Data ToolsSoap Apis Join Kainos and Shape the Future
        As a Salesforce Solutions Architect, you will lead design and delivery of scalable Salesforce solutions, ensuring alignment with customer needs. Responsibilities include overseeing integrations, defining best practices, and providing technical guidance to teams. As a Lead Solutions Architect, you'll design Salesforce solutions, oversee integrations, define best practices, and lead cross-functional collaboration. Top Skills: Data Privacy RegulationsIntegration SystemsSalesforceArtificial Intelligence Marketing Tech Software ConsultingThe Salesforce B2B Solution Architect leads technical teams to develop enterprise Salesforce solutions, manages client engagements, and ensures project success. Top Skills: CSSExperience CloudHTMLLightning FrameworkOmsRest ApisSalesforceSalesforce B2B CommerceSalesforce Data ToolsSoap Apis Join Kainos and Shape the Future
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        About the Team - The AI Center of Excellence team includes Data Scientists and AI Engineers that work together to conduct research, build prototypes, design features and build production AI components and systems. Our mission is to leverage the best available technology to protect our customers' attack surfaces. We partner closely with Detection and Response teams, including our MDR service, to leverage AI/ML for enhanced customer security and threat detection. We operate with a creative, iterative approach, building on 20+ years of threat analysis and a growing patent portfolio. We foster a collaborative environment, sharing knowledge, developing internal learning, and encouraging research publication. If youre passionate about AI and want to make a major impact in a fast-paced, innovative environment, this is your opportunity.
        About the Team - The AI Center of Excellence team includes Data Scientists and AI Engineers that work together to conduct research, build prototypes, design features and build production AI components and systems. Our mission is to leverage the best available technology to protect our customers' attack surfaces. We partner closely with Detection and Response teams, including our MDR service, to leverage AI/ML for enhanced customer security and threat detection. We operate with a creative, iterative approach, building on 20+ years of threat analysis and a growing patent portfolio. We foster a collaborative environment, sharing knowledge, developing internal learning, and encouraging research publication. If youre passionate about AI and want to make a major impact in a fast-paced, innovative environment, this is your opportunity.
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        Reposted 6 Days Ago Be an Early Applicant Belfast, County Antrim, Northern Ireland Belfast, County Antrim, Northern IrelandThe senior backend engineer designs and builds data ingestion pipelines, APIs, and low-latency microservices, collaborating cross-functionally. The summary above was generated by AI - Hybrid Schedule (M/F remote, T/W/TH in-office) At Magnite, we cultivate an environment of continuous growth and collaboration. Our work impacts what millions of people read, watch, and buy, and were looking for people to help us tackle that responsibility with creativity and focus. Magnite (NASDAQ: MGNI) is the worlds largest independent sell-side advertising platform. Publishers use our technology to monetize their content across all screens and formats including CTV / streaming, online video, display, and audio. Our tech fuels billions of transactions per day!
        Reposted 6 Days Ago Be an Early Applicant Belfast, County Antrim, Northern Ireland Belfast, County Antrim, Northern IrelandThe senior backend engineer designs and builds data ingestion pipelines, APIs, and low-latency microservices, collaborating cross-functionally. The summary above was generated by AI - Hybrid Schedule (M/F remote, T/W/TH in-office) At Magnite, we cultivate an environment of continuous growth and collaboration. Our work impacts what millions of people read, watch, and buy, and were looking for people to help us tackle that responsibility with creativity and focus. Magnite (NASDAQ: MGNI) is the worlds largest independent sell-side advertising platform. Publishers use our technology to monetize their content across all screens and formats including CTV / streaming, online video, display, and audio. Our tech fuels billions of transactions per day!
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        Background in technical areas, including AWS data services (e.g., S3, Glue, Athena), API design (REST, GraphQL), and legacy platforms (C#, SQL, SSIS)
        Background in technical areas, including AWS data services (e.g., S3, Glue, Athena), API design (REST, GraphQL), and legacy platforms (C#, SQL, SSIS)
        more

        93 exact matches jobs are outside your preferred location

        R&D Engineer - Remote

        MailerLite
        UK
        From £37,000 to £63,000 per annum (renumeration is paid in USD)
        MCP & API development: Maintain and develop our MCPs and extend MailerLites capabilities * API & System knowledge: REST APIs, webhooks, distributed systems design
        MCP & API development: Maintain and develop our MCPs and extend MailerLites capabilities * API & System knowledge: REST APIs, webhooks, distributed systems design
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        NEW
        One of our leading clients is looking to recruit a UI Engineer / Developer / Front End Developer / Software Engineer. Location remote - Duration 6 months - Experience in a UI Engineer / Software Engineer / Front End Developer / Angular Developer role - Angular experience essential - Building and maintaining responsive and accessible interfaces at scale - Familiarity with state management libraries (e.g., Redux, Zustand) and component-based architectures - Solid understanding of web performance optimisation, testing (unit, integration, and end-to-end), and cross-browser compatibility - Collaborate with UX designers and product teams to translate design wireframes and prototypes into working front-end components - Ensure a consistent look and feel across all digital products through the implementation and maintenance of a shared design system.
        One of our leading clients is looking to recruit a UI Engineer / Developer / Front End Developer / Software Engineer. Location remote - Duration 6 months - Experience in a UI Engineer / Software Engineer / Front End Developer / Angular Developer role - Angular experience essential - Building and maintaining responsive and accessible interfaces at scale - Familiarity with state management libraries (e.g., Redux, Zustand) and component-based architectures - Solid understanding of web performance optimisation, testing (unit, integration, and end-to-end), and cross-browser compatibility - Collaborate with UX designers and product teams to translate design wireframes and prototypes into working front-end components - Ensure a consistent look and feel across all digital products through the implementation and maintenance of a shared design system.
        more
        NEW
        SC Cleared Blue Prism Developer - 6 months - circa £500 a day INSIDE IR35 - Remote - We are looking for an SC Cleared BluePrism Developer to work within the Central Government sector - Looking for an experienced Automation developer. 1. Must have SC clearance - 2. Must have BluePrism Development experience - 3. Ideally have experience in PowerAutomate/APIs development - 4. Must be able to delivery independently, reporting to an automation lead but these automations will be theirs to own - Please forward your profile for consideration - Damia Group Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept our Data Protection Policy which can be found on our website. Please note that no terminology in this advert is intended to discriminate on the grounds of a person's
        SC Cleared Blue Prism Developer - 6 months - circa £500 a day INSIDE IR35 - Remote - We are looking for an SC Cleared BluePrism Developer to work within the Central Government sector - Looking for an experienced Automation developer. 1. Must have SC clearance - 2. Must have BluePrism Development experience - 3. Ideally have experience in PowerAutomate/APIs development - 4. Must be able to delivery independently, reporting to an automation lead but these automations will be theirs to own - Please forward your profile for consideration - Damia Group Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept our Data Protection Policy which can be found on our website. Please note that no terminology in this advert is intended to discriminate on the grounds of a person's
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        Day Rate: £500 - £700 - Duration: 6 months - IR35: Outside Scope - Overview - Are you a talented Software Developer eager to take on exciting project-based work with leading organisations? We are seeking skilled developers for multiple contract opportunities across various sectors, including tech, finance, and healthcare. * Engage in diverse and challenging projects, delivering immediate value to clients while enhancing your technical skills. * Collaborate with innovative teams to design and implement robust software solutions that meet business needs. * Experience the flexibility of contract work, allowing you to choose projects that align with your expertise and career goals. These contract roles are ideal for developers looking to make an impact quickly and explore different industries while enjoying the freedom of flexible assignments. Key Skills
        Day Rate: £500 - £700 - Duration: 6 months - IR35: Outside Scope - Overview - Are you a talented Software Developer eager to take on exciting project-based work with leading organisations? We are seeking skilled developers for multiple contract opportunities across various sectors, including tech, finance, and healthcare. * Engage in diverse and challenging projects, delivering immediate value to clients while enhancing your technical skills. * Collaborate with innovative teams to design and implement robust software solutions that meet business needs. * Experience the flexibility of contract work, allowing you to choose projects that align with your expertise and career goals. These contract roles are ideal for developers looking to make an impact quickly and explore different industries while enjoying the freedom of flexible assignments. Key Skills
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        Senior PHP Developer - UK Remote

        Global Technology Solutions Ltd
        UK
        £350- £370 per day - Inside IR35
        Senior PHP Developer - Location: Home-based - Remote - UK Based applicants only - Duration: Contract until 31 st December 2025 Expected extension - Rate: £350 - £370 Inside IR35 - Are you an experienced Senior PHP Developer with a passion for building secure, scalable, and business-critical applications? Were looking for a Senior PHP Developer to join our transformation team someone who can drive technical excellence, mentor others, and deliver innovative solutions. What Youll Do * Develop and maintain business systems, applications, and integrations. * Write secure, scalable, and maintainable code following best practices (MVC standards). * Design and build intuitive user interfaces using HTML, CSS, JavaScript (Vue.js or similar). * Review code and ensure high-quality, defect-free releases. * Document system architecture, design iterations, and processes.
        Senior PHP Developer - Location: Home-based - Remote - UK Based applicants only - Duration: Contract until 31 st December 2025 Expected extension - Rate: £350 - £370 Inside IR35 - Are you an experienced Senior PHP Developer with a passion for building secure, scalable, and business-critical applications? Were looking for a Senior PHP Developer to join our transformation team someone who can drive technical excellence, mentor others, and deliver innovative solutions. What Youll Do * Develop and maintain business systems, applications, and integrations. * Write secure, scalable, and maintainable code following best practices (MVC standards). * Design and build intuitive user interfaces using HTML, CSS, JavaScript (Vue.js or similar). * Review code and ensure high-quality, defect-free releases. * Document system architecture, design iterations, and processes.
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        Frequently Asked Questions

        How many contract API jobs are there in Belfast?
        There are 17 contract API jobs within 10 miles of Belfast available on Totaljobs right now.

        What other similar jobs are there to contract API jobs in Belfast?
        As well as contract API jobs in Belfast, you can find contract Salesforce, Cloud Engineer, Data Analytics, amongst many others.