Senior Web Application Developer jobs in Belfast

Job Description Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you'll have the opportunity to grow your career, give back to your community and make a real impact. Job Overview About the Department Developer Engineering & Engineering Excellence Tech is a function...

About Roadern Roadern is building an AI-powered road and asset intelligence platform used by road authorities and councils. Our product is mobile-first, turning smartphone imagery, GPS, and sensor data into actionable insights at scale. We’re looking for a senior engineer who is strong in React Native, comfortable with map-heavy interfaces, and happy working across mobile and web in a startup...

About Pronetx Pronetx is a cutting-edge consulting firm that specializes in transformative customer experience (CX) solutions powered by AWS. With decades of experience deploying sophisticated CX solutions for industry leaders like Capital One, Social Security Administration, and Hilton, we're known for pushing the boundaries of what's possible in customer experience technology. Job...

You will be working in a fast-paced environment to develop new website themes and add new features in a complex Next. js-based codebase (including a CMS). This is a great opportunity for the right person to take on a challenging and broad role. Homeflow is operating on a fully remote basis but occasional travel will be required for our company meet ups (bi-annually at most in the UK).

🚀 About Webigence and Spark Travel Webigence has 25 years of experience crafting UX‑first, often highly complex software. Our engineers pair forward‑thinking agile practices with an obsession for intuitive design, shipping products that feel effortless even when the logic underneath is anything but. Alongside a handful of long‑standing third‑party clients, we’re scaling our own SaaS...

You will contribute to exciting projects in digital agriculture, ensuring the quality and reliability of our web-based systems.

You will independently take on the following responsibilities: Plan, implement, and execute automated tests for web applications (frontend, backend, and database) using Robot Framework BrowserLibrary or Cypress within a CI/CD pipeline.

You will work closely with developers on Next.

Department: Support Reports To: Application Software Support Manager Location: Remote Salary: £55k - £60k /yr (depending on experience) Contract Type: Permanent – Full Time Role Summary We're looking for an experienced full-stack .NET developer to join our team in a new and exciting role. This role will initially be supporting an array of clients, helping our support team to continue to...

Position: Front End JavaScript Developer Reports to: Front End Development Team Lead Hours: 40 hours Location: 3 days in North London office (Monday – Wednesday) Salary: £60 - £80,000 + eligibility for performance bonus Start date: ASAP Purpose of the role: As a Front End Developer you will join one of our multinational Scrum teams to create state-of-the-art software solutions. In all...

You will work closely with Managers and Partners, taking ownership of key areas on site and progressing towards leading smaller audits.

You will be responsible for the entirety of the back end features of the products.

You will be in charge of building scalable backend services and awesome messaging queues.

You will be responsible for developing a Python-based back end platform that's handling 100,000+s of interactions daily.

Software Development Engineer III Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success. Why Join Us? To shape the future of travel, people must come first. Guided by our...

Reports to: Technology Director / Executive Sponsor Location: Remote with occasional travel to London (2 times a month) Contract: Full-time, permanent Base Salary: £70,000 – £80,000 location and experience dependent + 10% company bonus scheme and sales commission scheme Why This Role Exists Serve Legal is entering a new chapter: evolving beyond compliance auditing into AI enabled,...

You will design, develop, and maintain our platform’s backend infrastructure, focusing on multi-tenant architectures, security, and efficient LLM integration. This role requires a strong understanding of Python web frameworks, cloud services (particularly AWS), and modern AI approaches including working with agentic architecture.

About Roadern Roadern is building an AI-powered road and asset intelligence platform used by road authorities and councils. Our product is mobile-first, turning smartphone imagery, GPS, and sensor data into actionable insights at scale. We’re looking for a senior engineer who is strong in React Native, comfortable with map-heavy interfaces, and happy working across mobile and web in a startup...

You will work in an agile software development environment, developing quality and scalable software solutions using leading-edge technologies. Based on business requirements, you will develop code consistent with quality standards and offer support during testing cycles and post-production deployment.

You will work in an agile software development environment, developing quality and scalable software solutions using leading-edge technologies. Based on business requirements, you will develop code consistent with quality standards and offer support during testing cycles and post-production deployment.

You will have a truly global reach, which will provide you with new experiences and development opportunities right here in Belfast's iconic Titanic Quarter. Engineer the future of global finance. At Citi, our Tech team doesn't just support finance - we are helping to redefine it.

Job Description Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you'll have the opportunity to grow your career, give back to your community and make a real impact. Job Overview We're looking for multiple talented engineers Server Side , to join one of our...

About the Team: Data Solutions Technology strives to provide measurable competitive advantage to our business by delivering high quality, innovative and cost effective reference data technology and operational; solutions in order to meet the needs of the business, our clients, our regulators and stakeholders. Olympus is a next generation Data Fabric to streamline data sources across SMBF and...