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

Hopper
Dublin
Workplace: RemoteContractFunction: Customer Success & Account ManagementExperience: 6+ yearsSkills: ["Ownership","Communication","Mentoring","Problem-solving","Pragmatic tradeoffs"]

Own end-to-end realtime and voice experiences for an agentic AI travel assistant, from telephony/CPaaS integrations through streaming speech-to-text and text-to-speech and realtime model orchestration. Build full-stack features with React/TypeScript front ends, Scala and Python backend services, and GCP infrastructure. Drive multi-tenant scalability, partner integration capabilities, and safety/compliance guardrails while ensuring reliability via observability, incident response, and SLA performance.

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Hopper
Hopper
4 days ago

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

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 10 hours agoStatus: Live

Job Summary

Own end-to-end realtime and voice experiences for an agentic AI travel assistant, from telephony/CPaaS integrations through streaming speech-to-text and text-to-speech and realtime model orchestration. Build full-stack features with React/TypeScript front ends, Scala and Python backend services, and GCP infrastructure. Drive multi-tenant scalability, partner integration capabilities, and safety/compliance guardrails while ensuring reliability via observability, incident response, and SLA performance.
Location: Dublin
Workplace: Remote
Employment Type: Contract
Job Function: Customer Success & Account Management
Seniority: Mid level

Key Responsibilities

  • •Own the voice channel end to end, including telephony and CPaaS integrations, streaming speech-to-text/text-to-speech pipelines, realtime model orchestration, and latency/quality budgets.
  • •Build product features across the stack with web chat front ends in React/TypeScript, backend services in Scala and Python, and infrastructure on GCP.
  • •Design for multi-tenant scale using a single codebase serving many partners via configuration.
  • •Build safety and compliance tooling for enterprise partners, including guardrails, content filtering, and PII redaction integration points.
  • •Maintain platform reliability through observability, alerting, incident response, and SLA performance.

Pay and Benefits

Perks:EquityTravel AllowanceRemote Work

Key Requirements

  • •6+ years of software engineering experience with senior-level ownership across production systems and a true full-stack range.
  • •Hands-on experience with realtime systems for voice applications, including WebRTC/SIP, streaming media, or comparable low-latency products.
  • •Strong front-end skills (React, TypeScript) and deep backend experience (Scala or another JVM language and/or Python) plus cloud infrastructure experience on GCP or AWS.
  • •Experience designing, building, and maintaining RESTful APIs, microservices, or event-driven systems.
  • •Operable-systems mindset covering SLAs, observability, on-call rotations, and rollback plans.
Experience:6+ years
Skills:OwnershipCommunicationMentoringProblem-solvingPragmatic tradeoffs
Tech Stack:ReactTypeScriptScalaPythonGCPAWSTwilioAmazon ConnectCPaaSWebRTCSIPRESTful APIsMicroservicesEvent-driven systemsDeepgramElevenLabsWhisperOpenAI RealtimeGenesysLiveKit

Company Brief

Hopper
Hopper is a mobile-first travel marketplace and travel-tech provider (HTS) that uses machine learning and fintech ancillaries (Price Freeze, disruption protection) to power consumer bookings and white-label partner travel portals globally.
Industry: TravelTech
Company Size: Large (251 to 1,000 employees)
Revenue: USD 500M to 1B
Growth: Scaleup
Valuation: Unicorn (USD 1B+)
Funding: Series E+
Headquarters: Montreal, Canada
Founded: 2007
Glassdoor
Glassdoor: 3.2
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