Senior Full Stack Engineer (Realtime & Voice) Customer Experience Platform
Note on Contractual Status 🇮🇪: This position is offered as an Independent Contractor engagement (Contract for Services) and does not constitute an offer of direct employment. The successful candidate will operate as a self-employed individual or through a Personal Service Company (PSC). You will be responsible for your own tax, PRSI, and VAT compliance in accordance with Irish Revenue Commissioners regulations. Engagement is contingent upon providing proof of valid business registration and appropriate professional indemnity insurance.
About the Role
HTS Assist is Hopper's agentic AI assistant for travel, resolving flight changes, cancellations, refunds, and bookings over chat and voice for some of the world's largest travel brands. We're looking for a senior full stack engineer to anchor this product, owning the realtime and voice layer end to end while building across React/TypeScript front ends, Scala and Python services, and cloud infrastructure. The team is lean and senior, ownership is broad, and the path from your code to a traveler's phone call is short.
What would your day-to-day look like
- Own the voice channel end to end, including telephony and CPaaS integrations (e.g., Twilio, Amazon Connect), streaming speech-to-text and text-to-speech pipelines, realtime model orchestration, and latency and quality budgets
- Build product features across the stack, including web chat front ends in React/TypeScript, backend services in Scala and Python, and infrastructure on GCP
- Design for multi-tenant scale, with one codebase serving many partners through configuration rather than forks
- Build the safety and compliance plumbing enterprise partners audit, including guardrails, content filtering, and PII redaction integration points
- Keep revenue-critical deployments healthy through observability, alerting, incident response, and SLA performance
- Build the platform capabilities forward-deployed engineers configure for partner telephony integration...