Full Stack Engineer

Harrington Starr; Belfast City District; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Flexible hybrid working structure

Competitive salary and comprehensive/2

Job summary

Harrington Starr is partnering with a global technology organisation to hire a Senior Full Stack Engineer to join a growing engineering team in Belfast. You will design, build, and modernise enterprise-scale applications used across markets, contributing to technical strategy and best practices.

You'll work in a flexible hybrid environment, collaborating with Product, QA, and Engineering, and mentoring peers while delivering resilient software using C#/.NET, SQL Server, and cloud services such

Qualifications

• 5+ years of commercial C#/.NET development experience.
• Strong SQL Server and relational database knowledge.
• Experience with cloud platforms (Azure or AWS).
• Familiarity with APIs, CI/CD, and source control practices.
• Effective communication and stakeholder management.
• Experience in Agile software development environments.

Responsibilities

• Design, develop, and maintain scalable full-stack applications using .NET and modern frontend technologies.
• Build features and enhance enterprise products for performance and scalability.
• Collaborate with Product, QA, and Engineering throughout the software development lifecycle.
• Contribute to architectural decisions, code quality initiatives, and continuous improvement of engineering practices.
• Mentor engineers and drive technical excellence across the team.

Skills

Strong communication

Stakeholder management

Agile software development

Tools

Azure

AWS

SQL Server

CI/CD

Source control

Job description

Belfast, Northern Ireland | Permanent Role

Harrington Starr has partnered with a global technology organisation that provides critical software solutions to some of the world's largest financial services and professional services organisations. They are looking to hire a Senior Full Stack Engineer to join a growing engineering team, working on the development and modernisation of enterprise-scale applications used by clients across multiple markets.

This is an excellent opportunity to join a highly collaborative environment where you'll play a key role in designing, building, and enhancing business-critical platforms while contributing to technical strategy and engineering best practices.

Key Responsibilities:

• Design, develop, and maintain scalable full-stack applications using .NET and modern frontend technologies
• Build new features and enhance existing enterprise products, ensuring performance, reliability, and scalability
• Collaborate with Product, QA, and Engineering teams throughout the software development lifecycle
• Contribute to architectural decisions, code quality initiatives, and continuous improvement of engineering practices
• Support and mentor other engineers while helping drive technical excellence across the team

Benefits of the Role:

• Flexible hybrid working structure
• Competitive salary and comprehensive benefits package
• Opportunity to work on globally used enterprise software products
• Exposure to modern technologies, cloud platforms, and AI-enabled development tools
• Excellent career progression and professional development opportunities

What Skills, Experience and Qualifications are Required:

• Strong commercial experience with C#/.NET development
• Strong knowledge of SQL Server and relational databases
• Experience with cloud technologies such as Azure or AWS
• Understanding of APIs, CI/CD, source control, and modern software engineering practices
• Strong communication and stakeholder management skills
• Experience working within Agile software development environments

This role offers hybrid working, with an office location based in Belfast.