Overview
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In this role you will anchor HTS Assist, Hopper’s agentic travel assistant, by owning the real-time and voice layer end-to-end. You’ll build across React/TypeScript front ends, Scala and Python services, and cloud infrastructure to serve multiple partners from one codebase. You’ll shape scalable, multi-tenant platforms, implement safety/compliance guardrails, and drive reliable, low-latency experiences from code to customer touchpoints. This is a high-ownership, impact-driven opportunity in a fast-growing fintech travel platform.
Compensaciones / Incentivos
competitive salary
private medical and dental coverage
private life and accident coverage
unlimited PTO
FlexDesk on demand and home office stipend
gym and home office stipend
Responsabilidades
Own the voice channel end-to-end, including telephony and CPaaS integrations (e.g., Twilio, Amazon Connect) and streaming speech-to-text/text-to-speech pipelines
Build product features across the stack: React/TypeScript front ends, Scala and Python backends, and GCP infrastructure




Design for multi-tenant scale with a single codebase configured for partners
Develop safety and compliance plumbing (guardrails, content filtering, PII redaction)
Maintain healthy deployments via observability, alerting, incident response, and SLA monitoring
Configure and deploy platform capabilities for partner telephony integrations and go-lives
Elevate engineering standards through code reviews, architecture reviews, and mentoring
Requisitos principales
6+ years of software engineering with ownership of production systems
Hands-on realtime systems experience (voice applications, WebRTC/SIP, streaming media)
Strong frontend xqbhyrx with React/TypeScript and backend with Scala and/or Python; cloud experience (GCP or AWS)
Experience designing and maintaining RESTful APIs, microservices, or event-driven systems
Familiarity with AI coding tools and ability to review/correct code released
Operable-systems mindset: SLAs, observability, on-call, rollback plans
Strong problem-solving, pragmatic tradeoffs, and cross-functional communication with product/design/ops
strong communication
mentoring and leadership
collaboration across cross-functional teams
React
TypeScript
Scala

📌 Senior Full Stack Engineer (Realtime & Voice) Customer Experience Platform (Barcelona)
🏢 Hopper
📍 Barcelona