17 of 17 Permanent Performance Optimisation Jobs in Northern Ireland

to-end, integration, and regression tests using automation tools such as Selenium, Cypress, or similar Experience using build tools such as Webpack or Vite and configuration files Knowledge of performance optimisation techniques to optimise web performance and load times Knowledge of web security best practices to protect applications from vulnerabilities Appreciation of the full SDLC, proactive involvement More ❯

Belfast (Hybrid) Are you ready to help design and deliver the technology that powers global financial markets? Do you thrive in complex, enterprise-scale environments where architecture, innovation, and performance truly matter? My client is a world-leading provider of market infrastructure, giving institutions access to global financial and commodities markets. Through cutting-edge technology and responsible innovation, they … and architectural vision across multiple global engineering teams. Working closely with Product Managers, Release Train Engineers, and development teams, you'll ensure systems and applications are designed for scale, performance, and sustainability - aligning closely with business goals and enterprise standards. This role combines strategic architecture design with hands-on technical leadership, helping to shape modern, cloud-first solutions across … delivering technology solutions in financial or trading environments. Exposure to front-office or trader-facing systems. Knowledge of Scaled Agile Framework (SAFe). Familiarity with micro-frontend architecture and performance optimisation techniques. What's On Offer Competitive salary and annual performance bonus Hybrid working model with flexibility around office days Private healthcare, pension, and generous holiday allowance More ❯

features using React, TypeScript, and modern web tooling. Collaborate closely with designers, product managers, and backend engineers to deliver elegant, user-focused solutions. Lead discussions on front-end architecture, performance optimisation, and best practices. Write clean, maintainable, and testable code. Mentor junior engineers and contribute to continuous improvement across the team. Stay current with emerging front-end technologies … and CSS3/SASS. Experience integrating with RESTful APIs and working within modern CI/CD pipelines. Strong appreciation for responsive design, accessibility, and cross-browser compatibility. Familiarity with performance profiling and debugging complex UI applications. Excellent communication and collaboration skills, with a problem-solving mindset. Nice to Have Experience with or other SSR frameworks. Knowledge of design systems More ❯

practices to maintain quality and scalability. Essential Criteria: Proven experience writing clean, maintainable production-grade code in React and TypeScript. Strong understanding of modern frontend architecture, design patterns, and performance optimisation. Experience integrating with APIs and backend services. Ability to implement unit, integration, and end-to-end tests for frontend applications. Familiarity with state management tools (e.g. Redux, Zustand More ❯

/Hybrid Type: Permanent | Full-time Contact: Ryan Quinn on LinkedIn Company: OCHO - Building Teams Overview We are hiring Senior and Mid-Level Software Engineers to join a high-performance engineering team building distributed, event-driven financial systems at scale. These roles sit within a fast-moving, product-focused environment working on high-availability trading and payments platforms. You … will design, build and optimise cloud-native services with a strong emphasis on reliability, performance and secure engineering practices. For senior roles, we are seeking deep Java expertise. For mid-level roles, we welcome engineers from strong OO backgrounds who want to develop deep JVM expertise on the job. What You'll Do Build and maintain cloud-native distributed … systems Work on highly available, event-driven architectures Develop JVM-based services with a focus on performance and scale Optimise runtime behaviour and troubleshoot production workloads Contribute to system design, code reviews and best-practice engineering Collaborate with cross-functional teams across product, platform and operations Ship reliable, secure and well-tested software into production About You Senior Engineer More ❯

. Collaborate with designers and stakeholders to deliver clean, responsive, and user-friendly interfaces. Implement new functionality, integrations, and plugins to improve system capabilities. Contribute to backend improvements and performance optimisation. Participate in code reviews, testing, and documentation. Learn and contribute to projects involving mobile and modern web technologies (training and mentoring provided). Requirements Proven experience in PHP More ❯

WordPress. Collaborate with designers and stakeholders to deliver clean, responsive, and user-friendly interfaces. Implement new functionality, integrations, and plugins to improve system capabilities. Contribute to backend improvements and performance optimisation. Participate in code reviews, testing, and documentation. Learn and contribute to projects involving mobile and modern web technologies (training and mentoring provided). Requirements Proven experience in PHP More ❯

of software engineering experience, including 2+ years in a technical leadership or management role Strong knowledge of modern frontend technologies (React, TypeScript, Next.js, etc.) Solid understanding of frontend architecture, performance optimisation, and clean code principles Experience with CI/CD pipelines and cloud environments (AWS/Kubernetes) Background in mentoring and developing engineers, fostering a culture of quality More ❯

of software engineering experience, including 2+ years in a technical leadership or management role Strong knowledge of modern frontend technologies (React, TypeScript, Next.js, etc.) Solid understanding of frontend architecture, performance optimisation, and clean code principles Experience with CI/CD pipelines and cloud environments (AWS/Kubernetes) Background in mentoring and developing engineers, fostering a culture of quality More ❯

of software engineering experience, including 2+ years in a technical leadership or management role Strong knowledge of modern frontend technologies (React, TypeScript, Next.js, etc.) Solid understanding of frontend architecture, performance optimisation, and clean code principles Experience with CI/CD pipelines and cloud environments (AWS/Kubernetes) Background in mentoring and developing engineers, fostering a culture of quality More ❯

Things to Know About this Job Influence & Impact - Take ownership of SDK architecture and play a key role in long-term product strategy. Cutting-Edge Tech - Work with high-performance imaging hardware and advanced driver integrations. Attractive Package - Competitive salary, benefits, and genuine opportunities for professional growth. The Role SDK Development & Architecture Lead the architecture, design, and implementation of … Integration Integrate, test, and maintain 3rd-party hardware drivers (e.g., USB3, CoaXPress, CameraLink) into the SDK. Develop abstraction layers and APIs to enable seamless hardware communication. Troubleshoot and optimize performance for high-throughput data interfaces. Collaborate with hardware vendors to ensure driver compatibility and long-term support. Graphical User Interface (GUI) Design & Development Design and develop intuitive basic GUIs … Qt, WPF, JavaFX, or modern web technologies (React, Angular, etc.). Solid understanding of software engineering principles: design patterns, version control, CI/CD, and automated testing. Familiarity with performance optimisation and debugging complex systems including microcode, SDK and hardware. Professional Experience 7+ years of software engineering experience, with at least 3 years in a senior or lead More ❯

arisen for an experienced IT Infrastructure & Security Engineer to join the team. This role is pivotal in shaping and maintaining the company's IT landscape, ensuring resilience, security, and performance across all systems. The successful candidate will lead infrastructure design and deployment, manage critical systems, and play a key role in advancing the organisation's cyber security posture. From … bring: Proven experience in IT infrastructure design and deployment (on-premise and cloud) Strong knowledge of servers, firewalls, switches, and related technologies A proactive approach to system monitoring and performance optimisation Expertise in cyber security platforms, patching cycles, and risk assessments Familiarity with Windows, Office365, VPNs, and remote support A collaborative mindset and the ability to lead and More ❯

processes, including data warehouse and cloud infrastructure. Experience with multi-dimensional design, star schemas, facts and dimensions. Experience and demonstrated competencies in ETL development techniques. Experience in data warehouse performance optimization. Experience on projects across a variety of industry sectors an advantage, Comprehensive understanding of data management best practices including demonstrated experience with data profiling, sourcing, and cleansing routines More ❯

to work on high-impact systems that process complex financial data at scale, within a collaborative, engineering-driven culture. What You'll Be Doing Designing, developing and deploying high-performance .NET solutions within a cloud-native environment. Building modern microservices architectures using C#, .NET Core, and Azure. Working closely with Product, DevOps, and QA teams to deliver secure, scalable … 5+ years of commercial software engineering experience, ideally within .NET and modern distributed systems. Strong understanding of clean architecture, domain-driven design, and microservices. Experience with cloud deployments and performance optimisation. A passion for solving complex technical challenges and driving quality in everything you build. Excellent communication skills and a desire to contribute to a positive, collaborative engineering culture. More ❯

to work on high-impact systems that process complex financial data at scale, within a collaborative, engineering-driven culture. What You'll Be Doing Designing, developing and deploying high-performance .NET solutions within a cloud-native environment. Building modern microservices architectures using C#, .NET Core, and Azure. Working closely with Product, DevOps, and QA teams to deliver secure, scalable … 5+ years of commercial software engineering experience, ideally within .NET and modern distributed systems. Strong understanding of clean architecture, domain-driven design, and microservices. Experience with cloud deployments and performance optimisation. A passion for solving complex technical challenges and driving quality in everything you build. Excellent communication skills and a desire to contribute to a positive, collaborative engineering culture. More ❯

certifications Our tech stack ?? While we advocate for using the right tech for the right task, you can expect to work with the following technologies to ensure scalable, high-performance applications: Programming Languages: Java, Java OOPS, Java 8 Cloud technologies: AWS What you can expect ?? Apply object-oriented programming principles in Java to design and implement robust and scalable … often hiring for similar roles which your background might be better suited to. Minimum of 2 years' experience in Java software development Deep understanding of multi-threading concepts and performance optimisation. Proven ability to design, implement, and deliver complex software solutions. You thrive in problem-solving and analytical thinking You enjoy collaborating with multiple stakeholders in a fast-paced … bonus half day on Christmas Eve) with the opportunity to buy 5 additional days Generous company pension scheme Opportunity to get involved with community and charity-based initiatives Annual performance-based bonus PA share ownership Tax efficient benefits (cycle to work, give as you earn) We're committed to advancing equality. We recruit, retain, reward and develop our people More ❯

and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Director, Customer PerformanceDirector, Customer Performance in Western Europe Overview: The role is the primary interface with customers and customer facing teams regarding customer performance (fraud rate, approval rate, authentication success rate, compliance with … standards) in Western European countries. Role: Responsibilities include selling and delivering Franchise Solutions (trainings, performance optimization projects, mandatory FMP reviews) and engaging with customers when there are performance issues (including rule violations). The role also requires identifying fraud trend and to share these with product teams, customers, banking associations and regulators. Reports to Vice President, Customer Engagement … to achieve common goals. Execution: drives execution with strong follow-up of action items, making efficient use of time and incorporating contingencies into planning and following through on commitments. Performance: is focused and results driven, able to identify opportunities for selling Franchise Solutions and other Mastercard services. Flexibility: exhibits flexibility and commitment demonstrated by remaining focused when unanticipated changes More ❯