C++ Senior Software Developer (Windows)

About Us

Felix Payment Systems is an industry leading fintech located in Vancouver, BC. We have created the world’s first 100% cloud-based payment acceptance platform. Our technology transforms commercial-grade devices including point of sale displays, tablets, smartphones, scanners, mini-computers and kiosks into secure portable payment acceptance terminals using no additional hardware. This represents a significant and disruptive shift forward in the payments industry, reshaping how businesses accept transactions.

As a C++ Senior Software Developer on the client-side, you’ll lead the development of high-performance Windows applications, owning key components and delivering clean, efficient code. Your role will involve deep collaboration across teams, rigorous testing, and continuous optimization of client-side features for reliability and responsiveness.

Responsibilities:

• Maintain and enhance core payment algorithms and C++ SDK integrations within a Windows-based client environment.
• Enhance our card reading capabilities in the SDK and optimize our message-based protocol between the SDK and our Cloud payment services.
• Develop high-performance, secure client-side components optimized for Windows OS.
• Ensure client-side architecture and development practices meet PCI MPoC and other security compliance standards.
• Implement secure coding practices, threat modeling, and vulnerability mitigation strategies.
• Support partner integrations through secure client-side implementation, testing, and technical assistance during deployment and troubleshooting.
• Mentor junior team members by promoting best practices in C++ development, Windows architecture, and secure software design.
• Collaborate with team to refine requirements, user stories, estimates, and development plans.

• Design, implement, and unit test Windows-native applications using modern C++ standards and development tools.

Qualifications

• 8+ years of professional experience in software development with a strong focus on C++ in Windows desktop environments.
• 5+ years of experience designing and maintaining application data models and writing high performance SQL code.
• Bachelor's or advanced degree in Computer Science, Software Engineering, or equivalent practical experience.
• Solid understanding of Windows OS internals, including memory management, threading, and system APIs.
• Deep knowledge of Object-Oriented Design (OOD) and Object-Oriented Programming (OOP), with experience refactoring complex legacy systems.
• Proven ability to mentor junior developers, fostering a collaborative and growth-oriented team culture.
• Expertise in performance profiling, debugging, and optimizing high-volume client-side transactions.
• Hands-on experience with Windows security features, encryption protocols, code signing, and secure software distribution.
• Security-first mindset with experience designing and implementing software in regulated environments.
• Experience deploying and supporting enterprise-grade Windows applications, including installer packaging and update mechanisms.

Benefits

We value our employees and strive to create a supportive work environment:

• 3 weeks of vacation leave per year to relax and recharge.
• 6 additional paid personal leave days per year to support your well-being.
• Comprehensive employee benefits program.
• Snacks and drinks to keep you energized throughout the day.
• Hybrid work model with 3 days on-site and 2 days work from home to promote flexibility and collaboration.

At Felix Payment Systems, we are proud to be an equal opportunity employer committed to building a diverse and inclusive environment. We believe that a commitment to diversity and inclusion enables our employees to reach their full potential. Everyone is welcome and we strongly encourage applications from candidates of all backgrounds, experience, perspectives regardless of race, gender, sexual orientation, marital status, age, citizenship, disability, and national origin.