Full-Stack Software Engineer VOIP & Twilio Infrastructure

Bucharest - Romania

Monthly Salary: Not Disclosed

Posted on: 10 hours ago

Vacancies: 1 Vacancy

Job Summary

We are building a cloud VoIP call-center platform for a restaurant group with multiple locations and a centralized catering call center.
Phase 1 MVP includes Twilio Voice (inbound/outbound) TaskRouter queues & routing voicemail call recordings browser softphone admin dashboards
and multi-location routing. Phase 2 includes the visual IVR flow builder.

Responsibilities

Architect and implement backend powering real-time telephony and routing.
Integrate deeply with Twilio Voice API TaskRouter and TwiML webhooks.
Develop REST and WebSocket APIs for the browser softphone and admin dashboards.
Build ACD routing logic overflow rules and after-hours routing.
Implement voicemail and call recording pipelines; handle secure audio storage (S3/GCP).
Own multi-location logic: hours numbers E911 profiles routing rules menus.
Implement OAuth/JWT authentication and role-based access control.
Handle Twilio event callbacks including busy/no-answer/timeouts.
Implement compliance requirements (STIR/SHAKEN E911 verification recording consent).
Collaborate with frontend-focused engineer on shared API contracts and TypeScript models.
Deploy and monitor services using Docker CI/CD and cloud infrastructure.
Implement logging observability and automated call-flow and webhook tests.

Must-Have Requirements

Strong hands-on experience with Twilio Voice API and TwiML call control.
Experience with Twilio TaskRouter (queues workers reservations workflows).
3 years of and TypeScript experience.
Deep understanding of VoIP systems: SIP RTP WebRTC signaling DTMF.
Experience with webhooks async event-driven systems and distributed flows.
Database experience with PostgreSQL and ORM tools such as Prisma.
Experience with AWS S3 or GCP Cloud Storage for audio retention.
Knowledge of E911 STIR/SHAKEN and call-recording legal requirements.
Ability to build testable observable reliable backend services.
Strong communication and system design skills.

We are building a cloud VoIP call-center platform for a restaurant group with multiple locations and a centralized catering call center. Phase 1 MVP includes Twilio Voice (inbound/outbound) TaskRouter queues & routing voicemail call recordings browser softphone admin dashboards and multi-location...