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4 API jobs in County Armagh + 5 miles
69 exact matches jobs are outside your preferred location
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Principal Software Engineer - (Fully Remote) The Opportunity - Ocho is partnering with a fast-scaling, product-led Client to find a Principal Software Engineer to help lead the design and evolution of their new platform. You'll help design, build, and deploy the next generation of back-end systems that power their modern software ecosystem. Key Responsibilities * Collaborate closely with team members to deliver high-quality, testable, and valuable software * Take ownership of back-end services and APIs, with a focus on user-visible behaviour * Participate in deployments, support CI/CD pipelines, and assist with planning and delivery * Contribute ideas for improving processes, tooling, and architecture - Essential Experience * 8+ years C# / .Net Development experience * Experience in back-end / SaaS development * Experience with SQL databases
Principal Software Engineer - (Fully Remote) The Opportunity - Ocho is partnering with a fast-scaling, product-led Client to find a Principal Software Engineer to help lead the design and evolution of their new platform. You'll help design, build, and deploy the next generation of back-end systems that power their modern software ecosystem. Key Responsibilities * Collaborate closely with team members to deliver high-quality, testable, and valuable software * Take ownership of back-end services and APIs, with a focus on user-visible behaviour * Participate in deployments, support CI/CD pipelines, and assist with planning and delivery * Contribute ideas for improving processes, tooling, and architecture - Essential Experience * 8+ years C# / .Net Development experience * Experience in back-end / SaaS development * Experience with SQL databases
Location: Remote (NI-based) or Belfast City Centre (Grade A office) Salary: Up to £50,000 + benefits - We're hiring a Mid-Level Python Engineer to join one of the most exciting greenfield builds in the UK & Ireland market. You'll be working within an elite engineering team headed up by two of the best technical architects in Belfast - a rare chance to accelerate your career in an environment that genuinely promotes learning, engineering best practices, and innovation. * Work remotely from anywhere in the UK or from a Grade A office space in Belfast * Build a greenfield platform on AWS from the ground up * Exposure to bleeding-edge technologies, tooling and practices * Collaborate with and learn from industry-leading architects * Opportunity to shape the direction of a brand-new product * Solid Python engineering experience (ideally 2-4 years)
Location: Remote (NI-based) or Belfast City Centre (Grade A office) Salary: Up to £50,000 + benefits - We're hiring a Mid-Level Python Engineer to join one of the most exciting greenfield builds in the UK & Ireland market. You'll be working within an elite engineering team headed up by two of the best technical architects in Belfast - a rare chance to accelerate your career in an environment that genuinely promotes learning, engineering best practices, and innovation. * Work remotely from anywhere in the UK or from a Grade A office space in Belfast * Build a greenfield platform on AWS from the ground up * Exposure to bleeding-edge technologies, tooling and practices * Collaborate with and learn from industry-leading architects * Opportunity to shape the direction of a brand-new product * Solid Python engineering experience (ideally 2-4 years)
Up to £110k base + bonus | AWS | Greenfield Engineering | Optional Belfast Office - We're hiring a Principal Software Engineer to join a small, elite team building out core infrastructure for a next-gen crypto and digital asset platform. This is a hands-on leadership role focused on scalable backend systems, low-latency data flows, and secure, cloud-native architecture. You'll work remotely from anywhere in Northern Ireland, with the option to collaborate in a modern Grade A city centre office. The engineering culture is clean, pragmatic and delivery-focused - ideal for someone who enjoys solving complex problems with smart, reliable code and has a passion for shaping high-performance platforms. * Core backend services for trade execution, account management, market data, and transaction flows * Designing and building microservices and event-driven pipelines with stro
Up to £110k base + bonus | AWS | Greenfield Engineering | Optional Belfast Office - We're hiring a Principal Software Engineer to join a small, elite team building out core infrastructure for a next-gen crypto and digital asset platform. This is a hands-on leadership role focused on scalable backend systems, low-latency data flows, and secure, cloud-native architecture. You'll work remotely from anywhere in Northern Ireland, with the option to collaborate in a modern Grade A city centre office. The engineering culture is clean, pragmatic and delivery-focused - ideal for someone who enjoys solving complex problems with smart, reliable code and has a passion for shaping high-performance platforms. * Core backend services for trade execution, account management, market data, and transaction flows * Designing and building microservices and event-driven pipelines with stro
The Opportunity - Ocho is partnering with a fast-growing, product-led client to hire a Principal Software Engineer to help shape and deliver the next generation of their platform. This is a hands-on role focused on designing, building, and scaling modern backend systems in a fully remote environment. Key Responsibilities * Own and deliver high-quality, testable backend services and APIs * Collaborate across teams to support CI/CD, planning, and deployments * Improve tooling, architecture, and engineering practices - Essential Experience * 8+ years' experience with C# and .NET * Strong background in backend/SaaS development * Proficient with SQL databases * Excellent communicator and problem-solver - What's on offer? * Competitive salary + annual bonus * Fully remote working * Industry-leading benefits package - To apply, connect with Neill Ferguson on LinkedIn or subm
The Opportunity - Ocho is partnering with a fast-growing, product-led client to hire a Principal Software Engineer to help shape and deliver the next generation of their platform. This is a hands-on role focused on designing, building, and scaling modern backend systems in a fully remote environment. Key Responsibilities * Own and deliver high-quality, testable backend services and APIs * Collaborate across teams to support CI/CD, planning, and deployments * Improve tooling, architecture, and engineering practices - Essential Experience * 8+ years' experience with C# and .NET * Strong background in backend/SaaS development * Proficient with SQL databases * Excellent communicator and problem-solver - What's on offer? * Competitive salary + annual bonus * Fully remote working * Industry-leading benefits package - To apply, connect with Neill Ferguson on LinkedIn or subm
Location: Hybrid (2/3 days per week in office) Recruitment Partner: VANRATH - Job Type: Full-time | Permanent - Industry: Financial Technology / Payments - VANRATH is proud to be recruiting on behalf of a global leader in digital payments-an organization known for delivering secure, innovative financial solutions that support billions of transactions worldwide each year. This is a rare opportunity to join a purpose-driven company where technology meets impact. You'll work alongside top-tier engineers to build infrastructure that empowers people, businesses, and economies across more than 200 countries and territories. As a Staff Software Engineer within the Payment Processing team, you'll be a technical leader focused on building and enhancing complex payment integration systems. You'll help design highly available, scalable services while mentoring your peers and dri
Location: Hybrid (2/3 days per week in office) Recruitment Partner: VANRATH - Job Type: Full-time | Permanent - Industry: Financial Technology / Payments - VANRATH is proud to be recruiting on behalf of a global leader in digital payments-an organization known for delivering secure, innovative financial solutions that support billions of transactions worldwide each year. This is a rare opportunity to join a purpose-driven company where technology meets impact. You'll work alongside top-tier engineers to build infrastructure that empowers people, businesses, and economies across more than 200 countries and territories. As a Staff Software Engineer within the Payment Processing team, you'll be a technical leader focused on building and enhancing complex payment integration systems. You'll help design highly available, scalable services while mentoring your peers and dri
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Job Title: Staff Software Engineer (Python + Frontend) Type: Full-time - About the Role - We are seeking a highly experienced Staff Software Engineer with deep expertise in Python and a modern frontend framework (such as React, Vue, or Angular). In this role, you'll play a key part in designing and delivering scalable, high-performance systems that drive our core platform. Youll collaborate across teams to define technical strategy, build robust architecture, and mentor other engineers. This is a hands-on role for someone who thrives in a fast-paced, problem-solving environment and wants to have a significant impact on both the product and engineering culture. What Youll Do * Lead the design and development of scalable backend services using Python. * Architect and implement frontend features using your preferred modern JavaScript framework (e.g., React, Vue, Angular)
Job Title: Staff Software Engineer (Python + Frontend) Type: Full-time - About the Role - We are seeking a highly experienced Staff Software Engineer with deep expertise in Python and a modern frontend framework (such as React, Vue, or Angular). In this role, you'll play a key part in designing and delivering scalable, high-performance systems that drive our core platform. Youll collaborate across teams to define technical strategy, build robust architecture, and mentor other engineers. This is a hands-on role for someone who thrives in a fast-paced, problem-solving environment and wants to have a significant impact on both the product and engineering culture. What Youll Do * Lead the design and development of scalable backend services using Python. * Architect and implement frontend features using your preferred modern JavaScript framework (e.g., React, Vue, Angular)
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Senior Software Engineer - Belfast (Hybrid) Up to £80,000 + Exceptional Benefits | Backend Java | Global Impact | Flexible Working - MCS are delighted to be partnering with a forward-thinking global tech leader. This company is hiring for a Senior Software Engineer to join a highly collaborative engineering team tackling critical backend challenges. This is your chance to work on high-volume, real-time transactional services used by some of the most recognisable global brands. What You'll Be Doing * Designing and implementing backend microservices using Java and Spring Boot * Building and refining RESTful APIs that power secure, real-time payment flows * Writing clean, testable code with a focus on quality, performance, and reliability * Leading on feature analysis, architecture decisions, and release planning
Senior Software Engineer - Belfast (Hybrid) Up to £80,000 + Exceptional Benefits | Backend Java | Global Impact | Flexible Working - MCS are delighted to be partnering with a forward-thinking global tech leader. This company is hiring for a Senior Software Engineer to join a highly collaborative engineering team tackling critical backend challenges. This is your chance to work on high-volume, real-time transactional services used by some of the most recognisable global brands. What You'll Be Doing * Designing and implementing backend microservices using Java and Spring Boot * Building and refining RESTful APIs that power secure, real-time payment flows * Writing clean, testable code with a focus on quality, performance, and reliability * Leading on feature analysis, architecture decisions, and release planning
Senior Java Engineer - Belfast (Hybrid) Up to £80,000 + Exceptional Benefits | Backend Java | Global Impact | Flexible Working - MCS are delighted to be partnering with a forward-thinking global tech leader. This company is hiring for a Senior Software Engineer to join a highly collaborative engineering team tackling critical backend challenges. This is your chance to work on services used by some of the most recognisable global brands. What You'll Be Doing * Designing and implementing backend microservices using Java and Spring Boot * Building and refining RESTful APIs that power secure, real-time payment flows * Writing clean, testable code with a focus on quality, performance, and reliability * Leading on feature analysis, architecture decisions, and release planning * Contributing to peer reviews, automated testing, and continuous integration * Mentoring Junior De
Senior Java Engineer - Belfast (Hybrid) Up to £80,000 + Exceptional Benefits | Backend Java | Global Impact | Flexible Working - MCS are delighted to be partnering with a forward-thinking global tech leader. This company is hiring for a Senior Software Engineer to join a highly collaborative engineering team tackling critical backend challenges. This is your chance to work on services used by some of the most recognisable global brands. What You'll Be Doing * Designing and implementing backend microservices using Java and Spring Boot * Building and refining RESTful APIs that power secure, real-time payment flows * Writing clean, testable code with a focus on quality, performance, and reliability * Leading on feature analysis, architecture decisions, and release planning * Contributing to peer reviews, automated testing, and continuous integration * Mentoring Junior De
The Opportunity - Ocho is partnering with a fast-growing, product-led client to find a Performance Engineer to establish and scale a dedicated performance testing function. This is a hands-on role with scope to define strategy, shape tooling, and work across engineering, DevOps, and TechOps to ensure scalability and quality at every level of the application stack. Key Responsibilities * Own and deliver a company-wide performance testing strategy, including load, stress, and soak testing * Design and implement replica performance environments across cloud and on-prem infrastructure * Guide performance tooling, test data, and traffic modelling using tools like JMeter & K6 * Work closely with engineering teams to embed shift-left performance practices early in the SDLC - Essential Experience * 5+ years in performance testing
The Opportunity - Ocho is partnering with a fast-growing, product-led client to find a Performance Engineer to establish and scale a dedicated performance testing function. This is a hands-on role with scope to define strategy, shape tooling, and work across engineering, DevOps, and TechOps to ensure scalability and quality at every level of the application stack. Key Responsibilities * Own and deliver a company-wide performance testing strategy, including load, stress, and soak testing * Design and implement replica performance environments across cloud and on-prem infrastructure * Guide performance tooling, test data, and traffic modelling using tools like JMeter & K6 * Work closely with engineering teams to embed shift-left performance practices early in the SDLC - Essential Experience * 5+ years in performance testing
Working exclusively on frontend engineering (no backend work) while defining API schemas.
Working exclusively on frontend engineering (no backend work) while defining API schemas.
This is a hands-on, collaborative role focused on API-level test automation, BDD/TDD practices, and CI/CD pipeline integration. * Background in API testing and automation with tools like Selenium, Cypress, or Playwright
This is a hands-on, collaborative role focused on API-level test automation, BDD/TDD practices, and CI/CD pipeline integration. * Background in API testing and automation with tools like Selenium, Cypress, or Playwright
Automation Playwright Specflow API Postman
Automation Playwright Specflow API Postman
Defining API schemas and working closely with backend teams * Experience in API design and frontend performance optimisation
Defining API schemas and working closely with backend teams * Experience in API design and frontend performance optimisation
Skilled in API design, RESTful services, and structured data workflows
Skilled in API design, RESTful services, and structured data workflows
MCS Group is seeking a skilled and motivated Cloud Azure Data Engineer to join a high-performing data engineering team delivering enterprise-grade solutions. This is an exciting opportunity to work on a modern Lakehouse architecture that powers analytics, AI, and business-critical applications across the organisation. You'll be responsible for building and maintaining scalable data pipelines using Azure Synapse and other cloud-native tools, curating high-quality datasets, and enabling backend data services that support a single source of truth for the enterprise. This is a hands-on role for an engineer with a passion for automation, data governance, and cloud-first innovation. * Design and implement scalable pipelines in Azure Synapse, using the medallion architecture * Develop and optimise ETL/ELT workflows using Python, SQL, and PySpark
MCS Group is seeking a skilled and motivated Cloud Azure Data Engineer to join a high-performing data engineering team delivering enterprise-grade solutions. This is an exciting opportunity to work on a modern Lakehouse architecture that powers analytics, AI, and business-critical applications across the organisation. You'll be responsible for building and maintaining scalable data pipelines using Azure Synapse and other cloud-native tools, curating high-quality datasets, and enabling backend data services that support a single source of truth for the enterprise. This is a hands-on role for an engineer with a passion for automation, data governance, and cloud-first innovation. * Design and implement scalable pipelines in Azure Synapse, using the medallion architecture * Develop and optimise ETL/ELT workflows using Python, SQL, and PySpark
Senior Java Engineer - Contract - Location: Belfast (Hybrid) Contract Type: Daily Rate (6-Month Initial Term) Are you a skilled Java developer looking for your next contract opportunity? Our client, a well-established local organisation, is currently seeking a Senior Java Engineer to join their dynamic team for an initial 6-month contract. This is an excellent opportunity to work on impactful projects within a collaborative and supportive environment. As a Senior Java Engineer, you'll play a key role in the design, development, and delivery of high-quality software solutions. Working closely with cross-functional teams, you will be involved in the full software development lifecycle - from requirements gathering and system design to implementation, testing, and deployment. This role offers a hybrid working model, allowing you the flexibility to work both remotely and
Senior Java Engineer - Contract - Location: Belfast (Hybrid) Contract Type: Daily Rate (6-Month Initial Term) Are you a skilled Java developer looking for your next contract opportunity? Our client, a well-established local organisation, is currently seeking a Senior Java Engineer to join their dynamic team for an initial 6-month contract. This is an excellent opportunity to work on impactful projects within a collaborative and supportive environment. As a Senior Java Engineer, you'll play a key role in the design, development, and delivery of high-quality software solutions. Working closely with cross-functional teams, you will be involved in the full software development lifecycle - from requirements gathering and system design to implementation, testing, and deployment. This role offers a hybrid working model, allowing you the flexibility to work both remotely and
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Principal Performance Test Engineer - Remote
Principal Performance Test Engineer - Remote
VANRATH
Belfast, County Antrim
£60,000 - £70,000 per annum
Principal Performance Tester - Shape & Lead Performance Engineering - We're recruiting for a Principal Performance Tester to help establish and grow a performance testing capability at a fast-scaling tech business in the payments space. You'll drive strategy, design environments, and ensure systems meet demanding performance and scalability needs. * Define and deliver performance testing strategy (load, stress, soak). * Design, build, and optimise performance test environments. * Lead performance testing across APIs, web apps, and databases. * Provide insight on risks, bottlenecks, and tuning opportunities. * Guide and mentor teams, driving best practices and a shift-left approach. * 8-10+ years' experience in performance testing enterprise systems. * Significant leadership in quality/performance engineering.
Principal Performance Tester - Shape & Lead Performance Engineering - We're recruiting for a Principal Performance Tester to help establish and grow a performance testing capability at a fast-scaling tech business in the payments space. You'll drive strategy, design environments, and ensure systems meet demanding performance and scalability needs. * Define and deliver performance testing strategy (load, stress, soak). * Design, build, and optimise performance test environments. * Lead performance testing across APIs, web apps, and databases. * Provide insight on risks, bottlenecks, and tuning opportunities. * Guide and mentor teams, driving best practices and a shift-left approach. * 8-10+ years' experience in performance testing enterprise systems. * Significant leadership in quality/performance engineering.
Define and implement scalable test strategies across UI, API, performance, and integration layers
Define and implement scalable test strategies across UI, API, performance, and integration layers
Proven experience with API design and collaboration with backend teams
Proven experience with API design and collaboration with backend teams
Own the delivery of automated solutions for UI, API, database, performance and integration testing * Hands-on experience automating API, UI, backend and non-functional test scenarios
Own the delivery of automated solutions for UI, API, database, performance and integration testing * Hands-on experience automating API, UI, backend and non-functional test scenarios
Comfortable collaborating closely with backend teams to align API design with mobile constraints
Comfortable collaborating closely with backend teams to align API design with mobile constraints
Solid understanding of secure coding practices and API design.
Solid understanding of secure coding practices and API design.
Build and manage automated testing frameworks for web, mobile, API, and performance testing * You will have demonstrated experience building automated test frameworks for web and API testing.
Build and manage automated testing frameworks for web, mobile, API, and performance testing * You will have demonstrated experience building automated test frameworks for web and API testing.
Build and manage automated testing frameworks for web, mobile, API, and performance testing * You will have demonstrated experience building automated test frameworks for web and API testing.
Build and manage automated testing frameworks for web, mobile, API, and performance testing * You will have demonstrated experience building automated test frameworks for web and API testing.
Work closely with backend engineers and product teams to create seamless, API-driven UI workflows
Work closely with backend engineers and product teams to create seamless, API-driven UI workflows