Staff Software Engineer

🔒 Confidential Employer
Posted 23 April 2026
LOCATION
Belfast
TYPE
Full-time
LEVEL
Mid-Senior level
CATEGORY
Technology
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

C# .NET SQL Server CI/CD Agile/Scrum Web service solutions Test automation OO design

FULL DESCRIPTION

Every day, [Employer hidden — view at passion-project.co.uk] makes it possible for millions of people to move money between buyers and sellers using our payments solutions for credit, debit, prepaid and merchant services.  Our worldwide team helps over 3 million companies, more than 1,300 financial institutions and over 600 million cardholders grow with confidence and achieve amazing results.  We are driven by our passion for success and we are proud to deliver best-in-class payment technology and software solutions.  Join our dynamic team and make your mark on the payments technology landscape of tomorrow.

Key responsibilities:

  • Provide broad and in-depth knowledge of analysis, modification, and development of complex code/unit testing in order to develop concise application documentation
  • Perform and advise on testing, validation requirements, and corrective measures for complex code deficiencies and provide systemic proposals
  • Apply a full understanding and in-depth knowledge of procedures, methodology and application standards to include Payment Card Industry (PCI) security compliance
  • Provide estimates on complex initiatives, projects, and issues - Assist with software deployment activities to internal test environments and our production data center
  • Identify problems, issues, collect and integrate information from a variety of sources to establish a course of action and communicate the issue and solutions clearly and concisely
  • Contribute to project success by providing ideas, strategies, improving communication among team members and executing decisions
  • Assist with on-the-job training and provide in-depth expertise and advice to software engineers

Position Requirements:

  • Degree in Computer Science or a similar
  • 6+ years of software development experience
  • Experience with server side development in a Windows .NET environment (.NET, C#)
  • Experience designing and implementing scalable Web service solutions
  • Experience with relational databases (SQL Server or related)
  • Experience working in a CI/CD environment (e.g. Bamboo, Jenkins, GitLab) - Experience with test automation (Unit tests, BDD/Specflow)
  • Experience with design patterns, refactoring, OO design and related areas - Demonstrate functional comprehension of software design principles, including coupling/cohesion, decomposition/modularity, encapsulation/information hiding, and separation of interface and implementation
  • Strong analytical, problem-solving, and organizational skills
  • Proven ability to work as part of a team
  • Excellent communication skills
  • Experience working in an Agile/Scrum, or Lean/Kanban environment
  • Must reside in NI / commuting distance to Belfast and be eligible to work in the UK on a permanent and full-time basis

Benefits:

  • Competitive salary
  • Remote-first flexible working from our new office in the heart of Belfast city centre or remotely - wherever suits you best
  • 26 days leave (plus Bank holidays) increasing with length of service
  • Medical insurance
  • Dental insurance
  • Life insurance / income protection / critical illness
  • 5% to 8% matching pension contributions and Salary Sacrifice
  • 26 weeks company paid maternity leave
  • Cycle to work scheme
  • Electric car scheme
  • Stock purchase plan
  • Twice annual Worldwide Days of Service
  • Company social events
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