Senior Software Engineer (C++)

TL;DR

Senior Software Engineer (C++): Designing and building software for next-generation countertop and handheld Genius payment terminals, focusing on secure embedded devices for EMV contact, contactless, and mobile wallet transactions. Focus on technical design, implementation, and delivery, driving engineering excellence across the team.

Location: Hybrid, requiring reasonable practical travel distance to Belfast, United Kingdom for in-person team events.

Company

hirify.global enables millions of buyers and sellers to move money securely across the globe, building the payment technologies that power businesses and financial institutions.

What you will do

• Design, develop, and maintain C++ applications for smart-card, NFC/contactless, and mobile payment flows.
• Implement secure, end-to-end transaction handling, including cryptographic operations, key management, and digital signatures.
• Integrate terminal software with POS systems, payment gateways, and merchant applications.
• Own delivery across the full SDLC: requirements, architecture, implementation, testing, and release.
• Conduct code reviews and champion strong engineering principles, design patterns, refactoring, and maintainability.
• Mentor and guide the engineering team through coaching, knowledge-sharing, and leading technical initiatives.

Requirements

• Strong expertise in C++ development.
• Degree in Computer Science or related field with 3+ years of industry experience.
• Solid grounding in object-oriented design, software architecture, and design patterns.
• Comfortable working in a fast-moving environment with strong problem-solving and communication skills.
• Able to work from home as preferred but also live within reasonable practical travel distance to Belfast for in-person team events.

Nice to have

• Awareness of PCI DSS, P2PE, or other secure payment/cryptography standards.
• Experience with embedded systems, Linux development, or customer-facing payment devices.
• Kotlin or Android experience (including Jetpack Compose and Android Studio).
• Experience working in Lean/Kanban environments.
• Python or SQL exposure.

Culture & Benefits

• Competitive salary with performance bonus, health, dental, and vision coverage, and a pension plan.
• Flexible and remote-first working environment.
• Generous paid time off.
• Professional development and training opportunities.
• Employee assistance, wellbeing programs, and regular team events.