Senior Full Stack Engineer (Realtime & Voice), Customer Experience Platform

Stack

Responsibilities

• ▹Own the voice channel end to end: telephony and CPaaS integrations (Twilio, Amazon Connect)
• ▹Streaming speech-to-text and text-to-speech pipelines, realtime model orchestration, latency budgets
• ▹Build product features across the stack: React/TypeScript, Scala and Python services, GCP infrastructure
• ▹Design for multi-tenant scale via configuration rather than forks
• ▹Build safety and compliance plumbing: guardrails, content filtering, PII redaction
• ▹Keep revenue-critical deployments healthy: observability, alerting, incident response, SLA performance
• ▹Build platform capabilities forward-deployed engineers configure for partner integrations
• ▹Raise the engineering bar through code review, architecture reviews, and mentoring

Requirements

• ▹6+ years of software engineering experience with senior-level ownership of production systems
• ▹Hands-on realtime systems experience (voice applications, WebRTC/SIP, streaming media)
• ▹Strength in a modern front end (React, TypeScript) and depth on the backend (Scala or another JVM language, and/or Python)
• ▹Cloud infrastructure experience on GCP or AWS
• ▹Track record designing RESTful APIs, microservices, or event-driven systems
• ▹Familiarity using AI coding tools as a standard part of the workflow
• ▹An operable-systems mindset: SLAs, observability, on-call rotations, rollback plans
• ▹Ability to break down complex problems, make pragmatic tradeoffs, communicate well

Nice to have

• ▹Conversational AI or LLM orchestration experience (Deepgram, ElevenLabs, Whisper, OpenAI Realtime)
• ▹Working knowledge of cloud telephony or CPaaS platforms (Twilio, Amazon Connect, Genesys, LiveKit)
• ▹Experience building customer service, CRM, contact center, or workflow automation tools
• ▹Familiarity with travel industry technologies (PSS/GDS, hotel PMS/CRS)

Soft skills

What we offer

• ▹Competitive salary, pre-IPO equity packages
• ▹Employer-covered private medical and dental premiums
• ▹Private life and accident coverage
• ▹Generous parental leave, above industry standards
• ▹Co-working space access (FlexDesk) and work-from-home stipend
• ▹Unlimited PTO
• ▹Monthly gym membership allowance

About the company

Hopper's HTS Assist is an agentic AI assistant for travel, resolving flight changes, cancellations, refunds, and bookings over chat and voice for major travel brands.