Software engineer, Programmable Comms
Madrid OfficeFull-TimeMid-levelSoftware Engineering
Key Responsibilities:
- Design and build highly scalable and secure backend services, ensuring high availability, performance, and security to support high-volume workloads
- Design and maintain robust CI pipelines (GitLab CI), release workflows, and automated testing to implement continuous delivery best practices in production environments.
- Debug and optimize the application’s performance, focusing on memory leaks and CPU usage in a desktop environment, critical for maintaining a high audio quality during calls.
- Operate, monitor, and optimize distributed systems in AWS production environments
- Apply a deep understanding of RTC / VoIP architectures and protocols
- Participate in an on-call rotation to respond to critical system issues.
Qualifications:
- You have solid experience building backend services (preferably in TypeScript) with a strong focus on security, scalability, availability, and performance.
- You have strong knowledge of CI/CD pipelines, infrastructure-as-code, automated testing, and deployment best practices.
- You have hands-on experience with GitLab CI/CD (or similar), release workflows, code reviews, and continuous delivery in production.
- You are proficient in working in containerized environments (Docker, Kubernetes).
- You have experience operating and optimising systems in AWS production environments, ideally supporting high-volume, high-availability workloads.
- You have the ability to troubleshoot, monitor, and improve distributed systems running in production.
- You have an understanding of RTC / VoIP architectures and protocols (SIP, RTP).
- You are familiar with open-source SIP/RTC technologies such as FreeSWITCH, Kamailio, Asterisk, or similar.
- You have exposure to media servers, signaling flows, or real-time communications debugging.
- You stay current with modern development practices and tooling, including AI-assisted development tools, to maximize your productivity
- You have strong communication skills and fluency in English (written and spoken).
- You are autonomous, proactive, and comfortable owning features end-to-end.
- You are pragmatic and have a willingness to experiment, iterate, and continuously improve systems.
