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.

• 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 integrations and go-lives

• Raise the engineering bar through code review, architecture reviews, and mentoring

• 6+ years of software engineering experience, with senior-level ownership of production systems and genuine full-stack range

• Hands-on realtime systems experience, such as voice applications, WebRTC/SIP, streaming media, or comparable low-latency products

• Strength in a modern front end (React, TypeScript) and depth on the backend (Scala or another JVM language, and/or Python), along with cloud infrastructure experience on GCP or AWS

• A track record designing, building, and maintaining RESTful APIs, microservices, or event-driven systems

• Familiarity using AI coding tools as a standard part of their workflow, with the judgment to review, correct, and own everything that ships

• An operable-systems mindset, covering SLAs, observability, on-call rotations, and rollback plans

• The ability to break down complex problems, make pragmatic tradeoffs, and ship iteratively, backed by strong communication across product, design, and operations

• Bonus points for conversational AI or LLM orchestration experience, including speech technologies such as Deepgram, ElevenLabs, Whisper, or OpenAI Realtime

• Bonus points for working knowledge of cloud telephony or CPaaS platforms such as Twilio, Amazon Connect, Genesys, or LiveKit

• Bonus points for experience building customer service, CRM, contact center, or workflow automation tools

• Familiarity with travel industry technologies (PSS/GDS, hotel PMS/CRS) is a plus, though not required

• Billions of dollars worth of travel and travel fintech are sold through Hopper and HTS' channels every year.

• Our fintech products, including Cancel for Any Reason and Flight Disruption Assistance, have exceptionally strong CSAT because the terms are always clear, and customers receive instant, no-questions-asked resolutions.

• Almost 30% of our app customers purchase at least one fintech product when making a booking, and consumers are 1.6x more likely to repurchase if they add fintech to their booking versus if they booked just travel.

• Given the success of its fintech products, Hopper launched a B2B initiative, HTS (Hopper Technology Solutions), which represents more than 75% of the business.

Through HTS, any travel provider (airlines, hotels, banks, travel agencies, etc.) can integrate and seamlessly distribute Hopper's fintech or travel inventory on their direct channels. As its first HTS partnership, the company partnered with Capital One to co-develop Capital One Travel, a new travel portal designed specifically for cardholders. Other HTS partners include Air Canada, Uber, CommBank, Nubank, Flair Airlines and many more.

Hopper has been named the #1 most innovative company in travel by Fast Company. Hopper has been downloaded over 120 million times and continues to have millions of new installs each month. Hopper is now the #3 largest online travel agency in North America and 70% of our app customers are Gen Z and millennial travelers.

Hopper has raised over $750 million USD of private capital and is backed by some of the largest institutional investors and banks in the world. HTS is primed to continue its growth as the leading travel ecommerce provider in a $1 trillion online shopping category. The Hopper app and website will also continue to be the preferred travel provider for Gen Z and Millennials.

Come take off with us!

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