Developer startup jobs in Belfast

 ...seeking a platform-minded software engineer to build and own the developer-facing tools that sit at the heart of how engineers integrate...  ...managed, multi-tenant SaaS platform that helps organizations, from startups to Fortune 500 companies, secure, govern, and distribute... 

 ...backend engineers, AI research scientists, and others from Amazon, Microsoft, and Google, leading PhD programs like Stanford, high growth startups like Stripe, Vercel, Bolt, and many founders of their own companies. Overview With the growth of our Android app, being the... 

 ...We are looking to hire ambitious entrepreneurs to start and scale their own startups. We are serial entrepreneurs, for example Paul Müller (founder Adjust, €1.2B exit) and Petter Made (founder SumUp, €8B) who are eager to support outlier personalities and serial entrepreneurs... 

 ...environments and the opportunity to shape innovative solutions, we'd love to hear from you. Job Description As a Senior kdb+ Developer at [DI] you’ll be at the forefront of delivering high-performance, scalable solutions for some of the world’s most data-intensive... 

 ...within our DNA. Invest in us and we’ll invest in you!.  Job Description We are seeking an experienced Senior OutSystems Developer to oversee the design, development, and deployment of enterprise-grade applications using the OutSystems low-code platform. The successful... 

 ...learning, hands-on work experience and personalised career guidance to equip you with the skills and knowledge needed to excel as a kdb+ Developer, even without prior experience. You will join an intake of other like-minded Graduates, all starting on a level playing field!... 

 ...growth! Job Description What You’ll Be Doing Collaborating with business users to define new application requirements. Developing, testing, and maintaining clean, performant code for client applications. Supporting project delivery alongside Project... 

 ...Backend development experience using C#/.NET, ASP.NET, Java or another object-oriented programming language. Experience designing and developing REST APIs, microservices and distributed systems. Familiarity with SQL and/or NoSQL databases, including PostgreSQL, SQL Server... 

 ...rapidly growing digital technology company operating within the online consumer and transactional sector. They are looking for a Senior Developer to join their expanding technology team and work on high-traffic, transaction-heavy web platforms. This is an exciting... 

 ...cloud-native architecture and large-scale distributed systems Collaborative engineering environment with opportunities to mentor and develop others Opportunity to contribute to the design and delivery of next-generation technology About your next employer A... 

Proofpoint is a global leader in human- and agent-centric cybersecurity. We protect how people, data, and AI agents connect across email, cloud, and collaboration tools. Over 80 of the Fortune 100, 10,000 large enterprises, and millions of smaller organizations trust Proofpoint...

 ...Senior Software Developer At Oxford Instruments Andor, we are devoted to accelerating the greatest scientific advancements of our age. It matters to us that the products we develop make a real difference to our customers and contribute significantly to their research. We... 

 ...installation and maintenance. Software Engineers may interface with users to define system requirements and/or necessary modifications or develop cost estimates, budgets, and schedules. All roles require digital fluency, including the ability to work with emerging... 

 ...what is possible in scientific imaging. As a global leader in high-performance light measuring solutions, we combine cutting-edge developments in sensors, electronics, optics and software to create technology that enables some of the world's most important scientific breakthroughs... 

 ...Pattern: 08:30-5:00, on-site Benefits: Join an established, successful brand with a strong presence across multiple industries Develop a broad technical skillet by working across business-critical applications and databases Long-term career development and training... 

Proofpoint is a global leader in human- and agent-centric cybersecurity. We protect how people, data, and AI agents connect across email, cloud, and collaboration tools. Over 80 of the Fortune 100, 10,000 large enterprises, and millions of smaller organizations trust Proofpoint...

 ...engineering team working closely with a major global cloud provider, with the opportunity to contribute to a modern platform being developed from the ground up. Salary & Benefits Competitive salary and benefits package Hybrid working from Belfast Opportunity to... 

 ...Instruments Andor we are devoted to accelerating the greatest scientific advancements of our age. It matters to us that the products we develop make a real difference to our customers and contribute significantly to their research. We want to deliver differentiated, accessible... 

 ...meet business needs while adhering to best practices in security, performance, and maintainability. Role Responsibilities Design, develop, and maintain scalable full-stack applications using modern frameworks and cloud technologies. Collaborate with cross-functional... 

 ...collaborative backend design sessions and code reviews. Elevate the team's engineering standards by mentoring junior and mid-level developers. Required Qualifications Education & Experience: BS/MS in Computer Science, Engineering, or a related field, with 7+ years of... 

 ...Tactical Systems and Missile Defence, Optronics, and Radar.Together we offer fantastic opportunities for committed employees to learn and develop their career with us. At Thales UK, we research, develop, and supply technology and services that impact the lives of millions of... 

 ...passion for football, innovation and teamwork . We are a team of people who live and breathe the game — from coaches and players to developers and customer success specialists. At TeamFeePay, we value collaboration, creativity and ownership , encouraging everyone to... 

 ...team. Experience in financial services or trading technology would be beneficial but is not essential. What you'll do Design, develop and maintain scalable web applications using React on the frontend and C#/.NET on the backend. Build responsive user interfaces... 

 ...Spend The Role We are seeking a Senior Full Stack Software Engineer (Java) to join TRG Screen’s engineering team. You will design, develop, and evolve backend services and frontend applications across our enterprise product suite — a hands-on role that blends new feature... 

 ...adoption of AI tooling, spec-driven workflows, and responsible use of code-generation practices. Development & Delivery Design, develop, and own complex full-stack initiatives, setting the standard for code quality and craftsmanship. Conduct rigorous code reviews,... 

 ...deeply embedded within our DNA. Invest in us and we’ll invest in you!.   Job Description We are seeking an  experienced Java Developer  to join our team. This role requires experience in Java development, AWS, database management, and batch processing. As a Java... 

 ...-edge financial technology · Clear opportunities for career progression You will be part of a collaborative engineering team developing and maintaining innovative software solutions that support global trading operations. My client provides technology-driven solutions...