Nextiva · 4 hours ago
Senior Voice & Video Platform DSP Engineer
United States
Full-time
Remote
Mid, Senior Level
$100K/yr - $180K/yr
5+ years expNextiva is a global leader in customer experience and team collaboration, and they are seeking a Senior Voice & Video Platform DSP Engineer to enhance their next-generation voice and video platform. The role involves developing backend services for voice/video calling, implementing digital signal processing algorithms, and integrating AI features to improve call quality and reliability.
Call CenterCloud ComputingEnterprise SoftwareSaaSSoftware
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. Implement features like call setup, conferencing, transfers, and recording with a focus on efficiency and reliability
Enhance Audio Quality (DSP): Implement and tune digital signal processing algorithms for superior call audio. This includes noise suppression, echo cancellation, jitter buffer optimization, and voice activity detection to ensure crystal-clear, uninterrupted communication even on poor networks
Optimize Media & Codecs: Work with real-time media streaming (RTP) and various codecs (Opus, G.711, H.264, etc.). Optimize codec configurations and adapt bitrates on the fly based on network conditions to balance quality and bandwidth
Integrate Voice AI Features: Embed speech-to-text (ASR) and text-to-speech (TTS) capabilities into the platform. Enable AI voice agents to participate in calls by streaming audio to AI services and injecting synthesized speech responses. Manage conversation flow between humans and AI (handling interruptions, timing responses) to make interactions feel natural
Ensure Scalability & Resilience: Design services with a cloud-native approach (microservices, containers) for deployment on Kubernetes. Implement high-availability strategies (clustering, failover) across global data centers so that the platform achieves five-9s uptime with no downtime for maintenance
Performance & Reliability Tuning: Continuously profile and improve system performance end-to-end. Minimize call setup times and audio latency through efficient coding (C/C++ for media processing) and system optimizations
DevOps & Support: Use CI/CD pipelines to deploy updates safely with zero downtime. Write comprehensive automated tests (unit, integration, load) for your features. Participate in on-call rotation to troubleshoot and resolve production issues in real time, and implement lasting solutions to prevent recurrence
Collaboration: Work closely with Product Managers, front-end teams, AI/ML team and with network engineers
Qualification
Required
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
Comfort optimizing or using audio codecs (Opus, G.711, etc.) and improving call quality under varying network conditions
Proficiency in C/C++ for high-performance, multi-threaded systems programming
Experience writing efficient, low-latency code (lock-free structures, memory management)
Skilled with a higher-level language like Go or Java for building microservices and control logic
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) for load balancing, monitoring, and fault tolerance
Exposure to integrating speech recognition and text-to-speech in applications
Basic understanding of securing voice communications (TLS, SRTP) and safeguarding customer data (GDPR, HIPAA considerations for call recordings, etc.)
Comfortable using CI/CD, infrastructure-as-code, and logging/monitoring tools
Excellent collaboration and communication skills
Experience working in Agile teams
Ability to clearly document designs and mentor others
A proactive attitude to problem-solving and an enthusiasm for continuous learning in the fast-evolving communications and AI field
Benefits
Multiple health plan options to suit your needs, including medical, dental, vision, and telemedicine coverage
Life, disability, and supplemental indemnity plans
Flexible Time Off (FTO) for salaried employees, PTO for hourly employees, Paid Sick Time (PST), paid parental bonding leave, and paid holidays
401(k) with company match, Health Savings Accounts with company contributions, Dependent Care FSA
Employee Assistance Program and comprehensive wellness initiatives
Access to ongoing learning and development opportunities and career advancement
Company
Nextiva
Nextiva is a leading unified customer experience management company that helps businesses simplify and enhance their customer relationships.
1001-5000 employees
H1B Sponsorship
Nextiva has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (9)
2024 (14)
2023 (25)
2022 (23)
2021 (6)
2020 (3)
Funding
Current Stage
Late StageTotal Funding
$200MKey Investors
Goldman Sachs Asset Management
2021-09-14Private Equity· $200M
Leadership Team
Tracy Conrad
Co-Founder and Chief Amazing Officer
A
Anne Brennan
Chief Financial Officer
Recent News
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2025-10-21
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