Full-Time
Software Development Engineer Voice
Posted on 1/7/2026
Plivo
51-200 employees
APIs for cloud voice and messaging
No salary listed
Bengaluru, Karnataka, India
In Person
 Software Engineering (1) |
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- Strong foundation in systems programming -- C, Go, and/or Rust.
- Experience in backend and real-time systems engineering.
- Expertise in WebRTC, SIP, VoIP, and signaling/audio pipelines.
- Hands-on with open-source RTC stacks: Freeswitch, Kamailio, Livekit, RTPEngine, Pipecat
- Understanding of media negotiation, codec pipelines, and audio/video streaming.
- Knowledge of real-time networking (UDP/TCP, ICE, NAT traversal).
- Experience building and scaling distributed RTC platforms.
- Experience with AI voice systems -- TTS, STT, VAD, LLM voice agents, or speech embeddings.
- Familiarity with AI/ML frameworks (PyTorch, TensorFlow, ONNX) or model integration.
- Backend development experience in Python or Node.js.
- Strong debugging, profiling, and performance optimization skills.
- Builder mindset: proactive, curious, and thrives in complex systems.
- Design and build real-time voice systems using WebRTC, SIP/RTP and Websocket streaming.
- Engineer backend infrastructure for signaling, routing, call control, and audio/video processing.
- Work with open-source RTC stacks -- Freeswitch, Kamailio, Livekit, RTPEngine, and Pipecat.
- Develop and integrate AI capabilities, including: TTS (Text-to-Speech), STT (Speech-to-Text), VAD (Voice Activity Detection), Media servers and AI voice agents.
- Build and scale a global, distributed RTC platform with strong resilience, observability, and low latency.
- Integrate AI/ML models into real-time voice systems (speech recognition, synthesis, embeddings).
- Work across the stack -- from C/Go/Rust real-time components to Python/Node.js backend services, and our SDKs.
- Collaborate cross-functionally with Product, and DevOps teams.
- Instrument and monitor systems for quality, latency, and performance.
- Prototype rapidly: build, test, iterate, and deploy new RTC + AI features.
- Contribute to open-source voice and AI ecosystems.
- Be hands-on: Debug issues, tune queries, optimize performance, and improve resiliency, you own your code from dev to prod.
- Don’t be afraid to jump on a call or chat with a customer to ensure they have a smooth experience -- you own the outcome, not just the code.
- Use AI-assisted development tools to improve coding speed, testing, and code quality.
- Contributions to open-source RTC or AI projects.
- Familiarity with LLM integration and multimodal AI (voice + text).
- Experience in edge computing or real-time streaming optimization.
- Exposure to audio signal processing or DSP algorithms.
- Experience deploying real-time systems on cloud (AWS/GCP) with Docker/Kubernetes.
- Experience with AI voice agents, or voicebots.
Plivo provides a cloud communications platform that enables businesses to send SMS, make voice calls, and provision phone numbers. It works by offering APIs that developers can integrate into their applications, and a pay-as-you-go pricing model where charges are based on actual usage plus optional subscription fees for premium features. The platform relies on a global network of carrier partnerships to deliver reliable, low-latency communication with high uptime and proactive maintenance. Plivo differentiates itself through seamless API integration, global reach and scalable capacity, backed by strong reliability and carrier coverage, which helps businesses deploy communications inside their existing software. The company aims to help enterprises, startups, and developers communicate with customers at scale, across regions, with predictable costs and dependable delivery.
Company Size
51-200
Company Stage
Seed
Total Funding
$2.1M
Headquarters
San Francisco, California
Founded
2011
Simplify's Take
What believers are saying
- Plivo's profitable since 2015, handling 1B+ API requests monthly for Uber and Zomato.
- Plivo's Auth0 support and Contacto integrations boost secure developer adoption since 2021.
- Plivo's global network enables scalable, low-latency communications across 150+ countries.
What critics are saying
- Twilio erodes Plivo's market share, churning enterprises like Uber in 12-24 months.
- 10DLC mandates hike Plivo's US messaging costs 20-30% within 3-6 months.
- OpenAI APIs commoditize Plivo's Voice AI, obsoleting infrastructure in 18-36 months.
What makes Plivo unique
- Plivo provides carrier-direct connectivity to 190+ countries via 1600+ networks.
- Plivo offers <500ms latency Voice AI agents in 50+ languages with 99.99% uptime.
- Plivo's Contacto delivers AI-powered omnichannel contact centers with no-code deployment.
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Benefits
Professional Development Budget
Growth & Insights and Company News
6 month growth
↓ -3%1 year growth
↓ -5%2 year growth
↓ -3%While generative AI is transforming customer service, human support remains critical, especially in the fintech industry, where nuanced, complex and emotional situations often require more than an algorithmic response.When chatting online, half of the customers prefer communicating with real people rather than with AI chatbots, which are widespread nowadays. Meanwhile, according to other statistics, 34% of consumers find AI chatbots helpful in customer service.Taking into account this minor contradiction in users’ views, it seems that hybrid support models are on the rise — AI handles routine tasks, while humans step in where the stakes are much higher. So, let’s break down where AI excels, where it falls short, and why the AI-human synergy could be fintech’s smartest move.The Bright Side of AI in Fintech SupportAt first glance, it may seem that fintech is rapidly embracing AI only because it is a current trend everywhere. But that is slightly far from reality. Companies are also doing it because it simply works. In today’s digital world, customers expect support to be fast, personalized and always available
Inc. revealed this week that Plivo was included in the 2023 Inc. 5000, the magazine's annual list of the fastest-growing private companies in America.
Plivo yesterday won UC Today’s Innovation Award for Best CPaaS Platform.
Yesterday Plivo Inc. announced new support for Auth0 authentication.
Plivo won the Appealie Overall SaaS Award in the Development and DevOps category, and Plivo Inc. couldn’t be happier.