Staff Backend Engineer — AI-Driven Carrier Platform

a1mobile; San Francisco (CA); Híbrido; USD 150.000 - 230.000; Jornada completa

Descripción de la vacante

a1mobile is building the AI-native carrier for businesses in the San Francisco Bay Area. This hybrid role sits in our SF office and requires you to work from the office a few days per week.

You will own the backend and voice/messaging infrastructure, building systems end to end from design to production. Strong Python/Async, FastAPI, and AI/LLM experience are essential for shaping our carrier platform.

Formación

• Proven experience building production backend systems with Python (async/await).
• Strong system and API design skills, and relational data modeling in SQL.
• Experience shipping AI/LLM-powered features to real users; ownership mindset.

Responsabilidades

• Design and build backend services behind the AI receptionist (calls, messages, bookings, orders, quotes, follow-ups).
• Develop real-time voice AI pipelines (speech-to-text, LLMs, text-to-speech) with focus on latency and reliability.
• Collaborate with carrier infrastructure (voice, SMS/MMS, 10DLC, eSIM, provisioning).
• Create integrations and MCP connections to enable AI actions in customers’ tools (booking, ordering platforms).
• Evolve event-driven backend: durable ingestion, projections, replay.

Conocimientos

Backend systems

System design

API design

SQL relational modeling

Ownership & collaboration

Herramientas

Python (async)

FastAPI

Next.js

React

TypeScript

Flutter

Dart

AWS

PostHog

Sentry

Descripción del empleo

a1mobile is building the AI-native carrier for businesses in the San Francisco Bay Area. This hybrid role sits in our SF office and requires you to work from the office a few days per week.

You will own the backend and voice/messaging infrastructure, building systems end to end from design to production. Strong Python/Async, FastAPI, and AI/LLM experience are essential for shaping our carrier platform.