Senior Voice & Video Platform DSP Engineer
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Job Description
Senior Voice & Video Platform DSP Engineer developing real-time voice/video services for Nextiva. Enhancing call quality and enabling AI-powered features on a unified communications platform.
Responsibilities:
- Develop Core Communication Services: Build and maintain backend services for voice/video calling (signaling servers, call routing logic, media gateways) using SIP and WebRTC.
- Enhance Audio Quality (DSP): Implement and tune digital signal processing algorithms for superior call audio.
- Optimize Media & Codecs: Work with real-time media streaming (RTP) and various codecs (Opus, G.711, H.264, etc.).
- Integrate Voice AI Features: Embed speech-to-text (ASR) and text-to-speech (TTS) capabilities.
- Ensure Scalability & Resilience: Design services with a cloud-native approach (microservices, containers).
- Performance & Reliability Tuning: Continuously profile and improve system performance end-to-end.
- DevOps & Support: Use CI/CD pipelines to deploy updates safely with zero downtime.
- Collaboration: Work closely with Product Managers, front-end teams, AI/ML team, and network engineers.
Requirements:
- 5+ years of experience developing VoIP or real-time communication systems
- Strong knowledge of SIP protocol, WebRTC, and related networking (RTP, NAT traversal)
- Proven ability to implement call logic and troubleshoot signaling and media issues
- Hands-on experience with audio processing in real time
- Familiarity with noise reduction, echo cancellation, jitter buffers, and other voice QoS techniques
- Proficiency in C/C++ for high-performance, multi-threaded systems programming
- Experience writing efficient, low-latency code (lock-free structures, memory management)
- Experience building and deploying services in a cloud-native environment (Docker, Kubernetes)
- Knowledge of designing scalable microservices and using cloud infrastructure (AWS, GCP, or Azure)
- Exposure to integrating speech recognition and text-to-speech in applications
- Basic understanding of securing voice communications (TLS, SRTP) and safeguarding customer data
- Comfortable using CI/CD, infrastructure-as-code, and logging/monitoring tools
- Excellent collaboration and communication skills
- Experience working in Agile teams
Benefits:
- Health 🍏 - Multiple health plan options to suit your needs, including medical, dental, vision, and telemedicine coverage
- Insurance 💼 - Life, disability, and supplemental indemnity plans
- Work-Life Balance ⚖️ - Flexible Time Off (FTO) for salaried employees, PTO for hourly employees, Paid Sick Time (PST), paid parental bonding leave, and paid holidays
- Financial Security 💰 - 401(k) with company match, Health Savings Accounts with company contributions, Dependent Care FSA
- Wellness 🤸 - Employee Assistance Program and comprehensive wellness initiatives
- Growth 🌱 - Access to ongoing learning and development opportunities and career advancement
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