Experteer Overview 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 / Ventajas
- 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 mentoringResponsabilidades
- 6+ years of software engineering with ownership of production systems
- Hands-on realtime systems experience (voice applications, WebRTC/SIP, streaming media)
- Strong frontend 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/opsRequisitos principales
- 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

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