Senior VoIP Software Engineer (Berkeley)

We are looking for a skilled Senior Software Engineer to join our team. This role focuses on the design and development of resilient VoIP and SIP-based systems for emergency communications, working REMOTELY from anywhere in LATAM . This is an exciting opportunity to make a tangible impact on public safety while collaborating with a mission-driven and highly talented team.

• 7+ years of software engineering experience, with 4+ years focused on VoIP/SIP .
• Proven experience developing VoIP, SIP , and Real-Time Communication services.
• Proficiency in Python , or willingness to learn. Experience with Go or C/C++ is a plus.
• Strong knowledge of Linux-based environments and network protocols.
• Familiarity with tools like Wireshark, SIPp, libpcap, and BSD socket programming.
• Experience scaling solutions with automated testing tools and frameworks.
• Experience building or integrating AI-driven solutions is a plus.
• Strong communication and collaboration skills.
• Highly self-motivated and adaptable to fast-paced environments.
• Advanced English .

Main Activities

• Architect, develop, and deploy new features for SIP and voice-centric applications.
• Build and maintain live transcription and call recording systems.
• Ensure performance, scalability, and security across voice infrastructure.
• Collaborate with cross-functional teams to solve real-world safety challenges.
• Lead strategic architectural decisions and drive innovation.
• Develop testing tools and monitoring systems to ensure call quality and reliability.
• Participate in code reviews and continuous process improvement.
• Own meaningful parts of the platform and contribute to its growth.

Education

• Bachelor's degree in Computer Science, Information Technology, or a related field.

Definity First specializes in IT Services, Cloud Business Applications & Microsoft Technologies, providing enterprise-grade solutions that translate into a successful business transformation.

We were founded in 2004, with six offices distributed across the US and Mexico. Definity First has worked for transformative, iconic companies and universities such as Tesla, Flowserve, Harvard, Berkeley, Caltech, and more.

At Definity First we do not discriminate towards gender, age, sexual preferences/orientation, religion, pregnancy, ethnicity or place of origin.