Senior Full Stack Engineer – Realtime, Voice

This is a fully remote position, open to applicants in United Kingdom.

📋 Description

• Take full ownership of the voice channel from start to finish, encompassing telephony and CPaaS integrations, streaming speech-to-text and text-to-speech pipelines, real-time model orchestration, as well as managing latency and quality budgets.

• Develop product features utilizing React/TypeScript for front-end development, along with Scala and Python for backend services, and leverage GCP infrastructure.

• Architect solutions for multi-tenant scalability through configuration instead of relying on code forks.

• Implement safety and compliance functionalities, which include guardrails, content filtering, and integration points for PII redaction.

• Ensure the maintenance of revenue-critical deployments by employing observability, alerting, incident response, and managing SLA performance.

• Create platform capabilities to facilitate partner telephony integrations and support go-lives.

• Engage in code reviews, architecture evaluations, and provide mentoring.

⛳️ Requirements

• Minimum of 6 years of experience in software engineering.

• Senior-level expertise in managing production systems with a comprehensive full-stack skill set.

• Practical experience with real-time systems such as voice applications, WebRTC/SIP, streaming media, or similar low-latency products.

• Proficiency in React and TypeScript.

• Background in backend development using Scala or another JVM language and/or Python.

• Experience with cloud infrastructure, specifically on GCP or AWS.

• Proven ability to design, build, and maintain RESTful APIs, microservices, or event-driven architectures.

• Familiarity with AI coding tools, combined with the ability to review, refine, and take ownership of all delivered products.

• Experience in managing SLAs, observability protocols, on-call rotations, and rollback strategies.

• Capability to decompose complex problems, make reasonable trade-offs, and deliver iteratively.

• Excellent communication skills across product, design, and operational teams.

• Experience with conversational AI or LLM orchestration is advantageous.

• Familiarity with speech technologies such as Deepgram, ElevenLabs, Whisper, or OpenAI Realtime is a plus.

• Understanding of cloud telephony or CPaaS platforms like Twilio, Amazon Connect, Genesys, or LiveKit is beneficial.

• Experience in building customer service, CRM, contact center, or workflow automation tools is a bonus.

• Knowledge of travel industry technologies (PSS/GDS, hotel PMS/CRS) is an asset.

🏝️ Benefits

• Competitive salary.

• Pre-IPO equity packages.

• Full coverage of employee premiums for a group insurance plan via Vitality Health.

• Automatic contributions managed through Smart Pension.

• Generous parental leave policy.

• On-demand co-working space available through FlexDesk.

• Work-from-home stipend provided.

• Carrot Cash travel stipend.

• Unlimited paid time off (PTO).

• A culture that promotes entrepreneurship.

• Open lines of communication with management and company leadership.

• Small, agile teams that create a significant impact.