Windows C++ Security Developer

We are looking for a Senior Windows C++ Security Developer for a leading global electronic trading company. The company develops large-scale enterprise trading platforms used by clients in more than 85 countries and maintains a substantial Windows-native technology ecosystem.

As part of a new strategic security initiative, the company is building a dedicated team focused on identifying, analysing, and resolving security vulnerabilities across critical Windows applications and infrastructure components.

This is an opportunity to join a technically strong engineering environment working on complex native Windows systems, enterprise-scale architecture, and security-focused development.

• Poland
• Portugal
• Cyprus
• Spain

• Identify, investigate, and resolve security vulnerabilities in Windows-native applications
• Develop and maintain high-performance C++ applications
• Work with Windows APIs and low-level system components
• Analyse complex technical issues and perform root-cause investigations
• Contribute to architectural improvements and security-focused redesign initiatives
• Collaborate with multiple engineering teams within a large enterprise environment
• Participate in code reviews and engineering best practices
• Work within Git Lab CI/CD pipelines and modern development workflows

• Bachelor’s degree in computer science or related discipline.
• 7+ years’ experience in C++ programming.
• Strong skills in both structural and OOP, C++: concepts, data structures, patterns, templates, multithreaded programming.
• Solid experience in low-level Windows platform development, native OS APIs, sockets, timers, event-driven architectures and operating system internals.
• Strong understanding of systems programming concepts including networking, concurrency, synchronization primitives, and event loop design.
• Advanced debugging and troubleshooting skills, including diagnosis of stack corruption, memory leaks, buffer overflows, race conditions, and deadlocks.
• Experience writing robust, testable code with strong software engineering practices including unit testing, test-driven development and code reviews.
• Good knowledge of databases.
• Ability to work independently and within a team, own issues and solve them.
• Willingness to work with minimum 5-hour overlap with New York business hours (12:00 p.m. – 8:00 p.m. CET)

• Finance background, particularly in Fixed Income
• Experience with Python scripting
• Good knowledge of communication protocol and network programming fundamentals
• Flexible work setup: remote or a hybrid model.
• Health insurance coverage for those based in Poland and Cyprus.
• 50% coverage of health insurance for spouses and children in Poland and Cyprus.
• 24 days of paid vacation.
• 10 days of paid sick leave.
• 50% reimbursement for professional training, education, conferences.
• Work alongside a highly professional team.
• Engaging teambuilding events and activities.
• Relocation Package: assistance for relocation to Poland or Cyprus, if desired.
• Flight tickets, accommodation rent for 1st month for relocated employee and official family.
• Support in visa application and issue process, entry permit and residence permit processing.