Senior Real-Time Full-Stack Engineer (Voice & AI)

Apply; Greater London; Hybrid; GBP 90,000 - 125,000; Full time

Benefits offered by this job

Equity opportunities

Group insurance premiums covered

Pension plan contribution

Generous parental leave

Travel stipend / flexible workspace

Job summary

Hopper is seeking a senior full-stack engineer to anchor HTS Assist, spanning React/TypeScript front ends, Scala and Python services, and cloud infrastructure. You will own realtime voice integrations, streaming pipelines, and multi-tenant architecture while ensuring safety, observability, and robust go-lives across partner integrations.

The role emphasizes senior ownership, low-latency delivery, and collaboration with product, design, and operations to ship iteratively and raise engineering

Qualifications

• 6+ years of software engineering experience with senior ownership of production systems
• Hands-on realtime systems experience (voice apps, streaming, low latency)
• Strong frontend in React/TypeScript and backend in Scala, JVM languages, and/or Python
• Experience with RESTful APIs, microservices, or event-driven architectures
• Familiarity with AI coding tools integrated into development workflows
• Operable-systems mindset: SLAs, observability, on-call rotations, rollback plans

Responsibilities

• Own the voice channel end-to-end, including telephony and CPaaS integrations
• Build features across the stack: React/TypeScript front ends, Scala and Python services, and GCP/AWS infra
• Design multi-tenant architecture with configuration-based customization
• Implement safety, compliance, and PII redaction integration points
• Maintain reliability through observability, alerts, and incident response
• Support partner telephony integrations and go-lives through platform capabilities
• Mentor teammates and participate in architecture reviews

Skills

Full-stack

React/TypeScript

Scala

Python

GCP/AWS

Realtime systems

CPaaS/telephony

Tools

Twilio

Amazon Connect

WebRTC

SIP

GCP

AWS

LiveKit

Deepgram/Whisper/OpenAI

Job description

Hopper is seeking a senior full-stack engineer to anchor HTS Assist, spanning React/TypeScript front ends, Scala and Python services, and cloud infrastructure. You will own realtime voice integrations, streaming pipelines, and multi-tenant architecture while ensuring safety, observability, and robust go-lives across partner integrations.

The role emphasizes senior ownership, low-latency delivery, and collaboration with product, design, and operations to ship iteratively and raise engineering