Staff C++ Developer, Belfast

Staff Software Engineer with C++ Location: Belfast | Hybrid At a Glance Staff-level C++ engineering role focused on high-level, object-oriented development rather than low-level systems programming Design and development of a high-volume payment processing gateway Technical leadership: mentoring, driving best practice, shaping the roadmap Collaborative, agile team with end-to-end ownership from requirements to release 35 days holiday, private medical, flexible and hybrid working Who You'll Work For Our client is an established, specialist payments business, operating a high-performance payment processing gateway used by merchants and partners at scale. They are an engineering-led organisation that removes bureaucracy from the development process, giving engineers the space to focus on what they do best: solving complex technical problems and shipping quality software. The team operates with full lifecycle ownership, from requirements analysis through to production release, and places real value on technical expertise at every level. What You'll Be Doing Designing and developing server-side components of a high-volume payment processing gateway in high-level, object-oriented C++, using state-of-the-art practices including Behavioural Driven Development and Continuous Delivery Acting as a technical leader across the team: setting standards, mentoring engineers, and demonstrating how to execute complex software projects successfully Understanding merchant and partner needs and translating them into high quality, innovative solutions that deliver real customer value Collaborating closely with team members to ensure deliverables are technically accurate, useful, and delivered on time Identifying critical activities and tasks, contributing to estimation and planning, and keeping stakeholders informed with timely, accurate status updates Improving software development processes, methodologies, and tooling through applied experience, automation, and simplification Supporting deployment activities to internal test environments and production, as part of a team that owns the full delivery lifecycle Your Impact In this role, you will be a recognised technical expert and leader within the engineering function. Your work will directly shape the reliability, performance, and scalability of a payments platform used by merchants at scale. Beyond writing great code, you will raise the bar for the team around you, through mentorship, clear communication, and a relentless focus on quality at every stage of the software lifecycle. What We're Looking For Essential BSc, MSc, or equivalent in Computer Science or a related field, or equivalent commercial experience in high-level, object-oriented C++. Note: this role focuses on OO application development rather than low-level systems or embedded C++ Proven experience in server-side product development Strong understanding of database design and development Solid experience with Design Patterns, Refactoring, and OO Design principles Experience working in an Agile environment (Scrum or Lean Kanban) Strong analytical, problem-solving, and organisational skills Experience leading a team of engineers Eligibility to work in the UK on a permanent, full-time basis Experience working with Web Services Desirable Web client development skills: HTML, JavaScript, and CSS Experience with asynchronous messaging systems Windows development experience using .NET What's In It For You Attractive base salary Flexible working with the option to work from home 35 days holiday per year, with the option to buy additional days Private Medical Insurance Health Cash Plan Income protection and life insurance Group Personal Pension Plan, matched up to 5% Cycle to Work Scheme Free on-site car parking Office lunches and regular social events, including summer and Christmas parties If you're interested or have any further questions on the role, please feel free to reach out to Eve Geddis directly on LinkedIn. Skills: High Level C Object Oriented Programming Web Design Database Design Benefits: Pension Fund Medical Aid / Health CareTPBN1_NI