Windows C++ Security Developer Senior

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, analyzing, 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.

What you will do

• 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

• Analyze 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 GitLab CI/CD pipelines and modern development workflows

Required

• 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)

Nice to have

• Finance background, particularly in Fixed Income

• Experience with Python scripting

• JavaScript knowledge/experience

• Good knowledge of communication protocol and network programming fundamentals

Benefits

• 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.

In case of relocation to Cyprus, we offer

• Flight tickets, accommodation rent for 1st month for our relocated employee and his/her official family.

• Support in visa application and issue process, entry permit and residence permit processing