Software Engineer (Public Transport)

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FREQUENTIS Solutions & Services (FSS) as a member of the Austrian Group FREQUENTIS AG, is focused on software development, system engineering and delivery of safety-critical voice communication and information systems. Our solutions are developed and distributed in the following business segments: Air Traffic Management & Defence (civil and military air traffic control, aeronautical information management), Public Safety (police, fire and rescue services, emergency medical services) and Public Transport & Maritime (railway and urban transport solutions, vessel traffic management).

We are looking for a skilled Software Engineer to strengthen our growing product team and help scale a high-demand solution evolving from an incubator initiative into a mature product. You will join a cross-functional, self-organizing team building the backbone of safety-critical communication systems, where reliability is essential and quality is non-negotiable.

You will own features end-to-end—from initial design to final release—working with modern C++ in a microservices environment supporting real-time communication. Join an international technology leader and contribute to building reliable, scalable systems while enjoying flexible working conditions and a strong work-life balance.

Your Main Responsibilities

• Design, implement, and integrate backend services in modern C++ 17, C++23 and beyond), using asynchronous patterns and message-driven architectures
• Own features end-to-end: from concept, architecture, and design through implementation, integration, and release within a cross-functional team
• Write and maintain automated tests (unit tests, integration tests, and where appropriate fuzz tests) as a natural part of your development workflow
• Participate in code reviews, both giving and receiving feedback, as part of a culture where quality is everyone's responsibility
• Work with relational databases, build tooling with CMake, and monitor system health through observability and telemetry
• Collaborate with teammates in agile ceremonies, refine requirements together, and make pragmatic trade-offs as a team
• Maintain and improve CI/CD pipelines and contribute to the quality infrastructure that ensures system reliability

Technical Skills & Competencies

• Strong proficiency in modern C++ (C++17 and above, ideally C++20/23/26), with focus on writing well-structured, maintainable, and long-lasting software
• Experience building and maintaining microservice architectures
• Experience with asynchronous I/O programming (e.g. ASIO, event loops) and message-based communication
• Familiarity with communication protocols such as HTTP/2, WebSockets, AMQP, and SIP
• Experience with relational databases (MariaDB, SQLite)
• Experience with CMake as a build system and working with Clang/GCC toolchains
• Experience with containerization (Docker)
• Experience with CI/CD tools (e.g. Jenkins) and static analysis tools (e.g. Coverity)
• Experience with code coverage tooling and performance profiling
• Experience with C++ testing frameworks (e.g. Google Test or comparable)
• Familiarity with sanitizers (AddressSanitizer, LeakSanitizer, UBSan)
• Experience working in Agile environments (Scrum)

Zamestnanecké výhody, benefity:

• Training and development program (business and product trainings, language course)
• Employee Referral Program (financial reward for recommending a successful candidate
• Employee assistance program (law consultations, finance/tax consultations, psychological assistance paid by employer)
• Meal contribution fully paid by the company
• Multisport card/Pension scheme contribution (DDS)
• Flexible working hours, home office
• Refreshments, company & team events

Požiadavky na zamestnanca:

• Pragmatic mindset — makes sensible, context-based decisions rather than following rules blindly
• Comfortable with giving and receiving feedback; sees reviews as a tool, not a judgment
• Strong problem-solving mindset — proactively identifies, explores, and proposes solutions
• Understanding that quality and security in safety-critical systems are non-negotiable, with the discipline to act accordingly every day
• Team player with open communication, knowledge sharing, and focus on helping others succeed
• Collaborative mindset with ability to work effectively in cross-functional teams