Persistence is an early-stage company building the voice-AI platform for phone-first businesses — healthcare, insurance, mortgages, financial services and roadside assistance — industries that still run most customer interactions over the phone, where legacy fixes like IVR menus and offshore call centres handle only a slice and still leave people on long holds. Persistence's AI voice agents plug in like a human call- centre agent and handle calls at scale: build, test, deploy and continuously improve them from one platform.
The product is already live and multilingual — you can take a live call from an agent at persistence.dev. The bet is to be to voice-based customer operations what HubSpot or Salesforce became to their categories: a horizontal, telephony-native platform, in a global call-centre market worth roughly $390B. The team owns the full voice stack — real-time orchestration and turn-taking, telephony (SIP / WebRTC / LiveKit), and over time its own fine-tuned speech and language models for phone calls.
This is a genuine founding-team seat in Bengaluru — early engineers shape the core architecture and own services end-to-end, not a slice of a mature codebase.
Leadership
- CEO — Utkarsh Marwaha. Background across voice AI and big tech (ex-Retell AI, ex-Nasdaq), plu two earlier ventures he founded; engineering graduate (ANU).
- Head of Engineering — Raj Yadav (your reporting line). 8+ years; previously at Sanas and ShopUp.Has built Go/gRPC services at 10K+ RPS, ClickHouse analytics, and real-time voice pipelines at scale.
The Role
As a Frontend Engineer, you'll build fast, reliable and polished interfaces for the Persistence platform — the
surfaces teams use to build, deploy, monitor and continuously improve their voice agents. You'll work closely
with backend, AI and product teams, own features end-to-end, and care deeply about performance, clean
code and UX.
What You'll Do
• Build high-quality web applications using React.
• Manage server state using React Query.
• Use React hooks and the Context API for scalable state management.
• Write clean, maintainable, well-structured code.
• Build responsive, polished UI with modern CSS.
• Optimize frontend performance — lazy loading, memoization, efficient rendering.
• Work closely with backend APIs and product teams, and improve developer experience and frontend
architecture.
What We're Looking For
• 4–10 years of frontend development experience.
• Strong experience with React.
• Deep understanding of Hooks and the Context API.
• Experience with React Query.
• Strong JavaScript / TypeScript
• Good understanding of CSS and responsive UI.
• Experience optimizing frontend performance.
• Ability to own features end-to-end.
Nice to Have
• Experience with Next.js.
• Experience with design systems or component libraries.
• Experience with testing frameworks.
• Startup experience.
What Matters Most
• You write clean, readable code.
• You care about performance and UX.
• You move fast and own problems.
• You enjoy building real products used by millions.
