Senior C/C++ Engineer

The Senior C/C++ Engineer sits within the company's product engineering team, building and maintaining performance-critical systems software that underpins the company's conversational AI infrastructure. The role requires strong systems-level programming fundamentals and, ideally, prior exposure to telephony or real-time communications stacks such as Asterisk-based voice platforms, SIP signaling, and dialplan engineering. It is structured to let a strong C/C++ engineer grow into deep telephony specialization over time, with mentorship available from the team's existing SIP experts. Engineers who already bring that expertise are fast-tracked into the specialized workstreams.

Accountabilities

• Own the design, development, and ongoing support of performance-critical C/C++ components across the company's platform.

• Own resolution of scalability and performance issues affecting telephony and SIP systems.

• Ensure effective time management and consistent delivery against deadlines.

• Contribute as an integrated, collaborative team member across engineering and cross-functional teams.

Key Responsibilities

• Design, implement, and maintain C/C++ components across the company's platform, with emphasis on performance, memory safety, and concurrency correctness in production systems.

• Develop efficient applications for mission-critical systems geared for high availability and performance.

• Debug complex, multi-threaded, low-level issues using tools such as gdb, valgrind, and/or strace.

• Develop, extend, and maintain custom Asterisk modules (res_, chan_, app_*) to support call handling, recording, and routing requirements specific to the platform.

• Patch, rebuild, and validate Asterisk core and third-party modules against upstream security advisories and internal hardening requirements.

• Identify performance bottlenecks and suggest improvements.

• Develop with security principles in mind and scale services with a DevOps mindset.

• Meet regularly with the line manager to review progress; manage issue resolution and escalate critically when needed.

• Work effectively with other teams, units, and departments, ensuring clear information flow and team working.

• Support other organisational priority activities when necessary, and act as the company ambassador.

Requirements

Required

• 5+ years professional experience in C/C++ systems programming, including memory management, multithreading, and low-level debugging.

• Experience with Git and C/C++ build systems such as CMake or Meson.

• Hands-on experience modifying, compiling, and deploying Asterisk.

• Experience writing APIs and/or Web Services & Microservices using C/C++.

• Object-oriented analysis and design using common design patterns.

• Self-motivated and driven to create extraordinary things.

• Ability to work under pressure and on strict deadlines.

• Bachelor's degree in Computer Science.

• Very good written and oral communication skills in English.

• Continuous innovation mindset.

Nice to have

• Knowledge of SIP (RFC 3261) and related RFCs (SDP, RTP/RTCP, STUN/TURN/ICE) and practical dialplan authoring experience.

• Experience with Java or Python programming.

• Familiarity with FreeSWITCH, Kamailio, or OpenSIPS, WebRTC-to-SIP interworking, or call recording/audio codec architectures (G.711, G.729, Opus).

• Experience in regulated environments (PCI-DSS, HIPAA) where call recording and redaction requirements apply.

Benefits

• Fixed compensation;

• Long-term employment with the working days vacation;

• Development in professional growth (courses, training, etc);

• Being part of successful cutting-edge technology products that are making a global impact in the service industry;

• Proficient and fun-to-work-with colleagues;

• Apple gear

The company is proud to be an equal opportunity employer and is dedicated to fostering a diverse and inclusive workplace. We believe that embracing diversity in all its forms enriches our workplace and drives our collective success. We are committed to creating an environment where everyone feels welcomed, valued, and empowered to contribute their unique perspectives without regard to factors such as race, color, religion, gender, gender identity or expression, sexual orientation, national origin, heredity, disability, age, or veteran status, all eligible candidates will be given consideration for employment.