Senior Full Stack Engineer – Realtime, Voice, Customer Experience Platform

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

📋 Description

• Take ownership of the voice channel from start to finish, covering telephony and CPaaS integrations.

• Develop streaming speech-to-text and text-to-speech pipelines.

• Coordinate real-time models while overseeing latency and quality budgets.

• Create product features utilizing React/TypeScript for front-end development, alongside Scala and Python for backend services, all within GCP infrastructure.

• Design solutions for multi-tenant scalability using configuration rather than code forks.

• Establish safety and compliance measures, including guardrails, content filtering, and PII redaction integration points.

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

• Develop platform capabilities for partner telephony integrations and their go-lives.

• Contribute to the team through code reviews and architecture assessments.

• Mentor fellow engineers and elevate the engineering standards.

⛳️ Requirements

• A minimum of 6 years of experience in software engineering.

• Senior-level responsibility for production systems with a genuine full-stack capability.

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

• Proficiency in React and TypeScript.

• Strong backend knowledge in Scala or another JVM language and/or Python.

• Familiarity with cloud infrastructure, preferably on GCP or AWS.

• Experience in designing, building, and maintaining RESTful APIs, microservices, or event-driven architectures.

• Comfort with AI coding tools and the capacity to review, correct, and take ownership of deployed code.

• Knowledge of SLAs, observability, on-call rotations, and rollback strategies.

• Ability to deconstruct complex problems, make practical trade-offs, and deliver iteratively.

• Strong communication skills across product, design, and operations teams.

• Experience with conversational AI or LLM orchestration is a plus.

• Familiarity with speech technology such as Deepgram, ElevenLabs, Whisper, or OpenAI Realtime is advantageous.

• Experience in cloud telephony or CPaaS platforms like Twilio, Amazon Connect, Genesys, or LiveKit is a bonus.

• Background in building customer service, CRM, contact center, or workflow automation tools is an asset.

• Familiarity with travel industry technologies such as PSS/GDS and hotel PMS/CRS is beneficial but not mandatory.

🏝️ Benefits

• Competitive salary.

• Pre-IPO equity packages.

• Employee premiums fully covered for private medical and dental insurance.

• Private life and accident insurance coverage.

• Generous parental leave policies.

• Access to on-demand co-working space via FlexDesk.

• Work-from-home stipend available.

• Unlimited paid time off (PTO).

• Monthly cash allowance for gym memberships.

• Monthly cash allowance for home office expenses.

• Carrot Cash travel stipend provided.

• Open lines of communication with management and company leadership.

• Small, agile teams with significant impact.