Senior Software Engineer, Full Stack (C# (.NET))

Join TRG Screen: Building World-Class Teams. One Expert at a Time.

Are you ready to be part of a dynamic team at the forefront of subscription spend management innovation?

At TRG Screen, we're not just redefining how organizations manage their subscription expenses – we're shaping the future of the industry. With cutting-edge solutions and a commitment to excellence, we empower businesses around the globe to optimize their subscription investments and drive sustainable growth.

Join us in our mission to revolutionize subscription management and make a meaningful impact on the way businesses access and utilize critical information. At TRG Screen, your talent and ambition will find a home, where opportunities for growth and advancement abound.

About TRG Screen

TRG Screen is the leading provider of market data and subscription management technology and automation solutions, tailored to the unique needs of financial institutions and legal firms. Our integrated suite of solutions includes market data and subscription spend management, usage management, compliance reporting, and comprehensive managed services, which hundreds of clients worldwide use to remove cumbersome and inaccurate manual processes and gain control over market data and subscription costs at scale. For more than 25 years, TRG Screen has enabled businesses who rely on market data to monitor and strategically manage spending and usage of data and information services, including market data, research, software licenses, consulting and other necessary corporate expenses. TRG Screen solutions give decisionmakers full transparency into subscription spend and usage, enabling them to proactively manage subscription costs at scale, conduct more informed vendor negotiations, improve governance, and avoid unnecessary spending on these mission-critical business services. TRG Screen is headquartered in New York City, with offices in Europe and Asia, as well as a 24x7 client support center in Bangalore, India.

TRG Screen is a portfolio company of Vista Equity Partners, one of the world’s largest and most respected private equity firms.

Position: Senior Software Engineer, Full Stack (C# (.NET))

Location: Belfast

Team: Activity Monitor

The Role

We are seeking a Senior Full Stack Software Engineer (.NET) 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 development with improving and modernising complex, established systems. TRG Screen is an AI-driven engineering organisation; this role is expected to use AI tooling by default across the full development lifecycle.

Responsibilities

Development & Delivery

• Design, develop, and maintain backend services and frontend applications for TRG Screen products, including modernisation and maintenance of legacy code.
• Participate in the full SDLC — requirements analysis, design, implementation, testing, deployment, and post-release support.
• Operate independently on complex tasks, owning features end-to-end across the full stack.
• Participate in code reviews, providing constructive feedback and ensuring adherence to clean code principles.
• Troubleshoot and resolve complex software issues across backend and frontend.
• Use AI tooling as standard practice across design, implementation, code review, and testing to improve quality and delivery speed.

Technical Leadership

• Contribute to architecture discussions and technical decision-making.
• Apply clean code principles and design patterns to deliver maintainable, scalable systems.
• Champion automated testing practices and contribute to system reliability, performance, and security.
• Actively adopt AI-driven development practices and contribute to their adoption within the team.
• Produce technical documentation such as design specifications and runbooks.

Team Leadership & Collaboration

• Collaborate effectively with product managers, QA, UX designers, and other stakeholders.
• Mentor junior engineers and contribute to team knowledge sharing.
• Contribute to team knowledge through pairing and documentation.
• Communicate clearly on technical topics with both technical and non-technical stakeholders.
• Participate in sprint planning, estimation, and continuous process improvement.

Required Skills And Qualifications

• 5+ years of professional experience as a Full Stack Developer using the Microsoft stack.
• Strong experience with C# and .NET, building enterprise-grade backend systems.
• Knowledge of JavaScript and TypeScript, with experience in modern front-end frameworks (Angular, React, or similar).
• Strong database skills with relational databases (SQL Server or PostgreSQL preferred).
• Solid understanding of clean code principles, design patterns, and testing practices.
• Familiarity with Git, Docker, and cloud platforms (AWS or Azure).
• Excellent communication and collaboration skills.

Preferred

• Exposure to microservices architecture and API design.
• Experience with messaging systems (e.g., Kafka, RabbitMQ, NATS).
• Experience with CI/CD pipelines and DevOps practices.
• Experience using AI-driven development tools (e.g., Claude Code, Cursor, GitHub Copilot) to enhance productivity and code quality.
• Familiarity with spec-driven development — using structured specifications to guide AI coding agents and validate generated output (e.g., BMAD, GitHub Spec-Kit).
• Familiarity with financial services or research technology domains.…