Senior AI Platform Engineer — Real-Time Voice & Telephony

Car Wars; Abilene (TX); On-site; USD 130,000 - 180,000; Full time

Benefits offered by this job

Full benefits package

401k with company match

Monthly gym reimbursement

Monthly wellness reimbursement

Monthly reading allowance

Career growth opportunities

Fun collaborative environment

Job summary

Call Box is building a high-performance, AI-native engineering organization. This individual contributor role involves shipping and owning your product, designing features, writing production code daily, and solving hard problems in real-time AI systems.

We are creating a conversational voice AI system for the automotive industry, processing real-time voice AI calls at scale for thousands of dealership customers.

Qualifications

• CS degree (or demonstrated equivalent depth in algorithms, systems design, distributed computing) 5+ years building and scaling production systems.
• Expert-level TypeScript and Node.js experience.
• Strong AWS experience (ECS, Lambda, EventBridge, RDS/ElastiCache, SQS, CloudWatch, networking, IAM).
• Infrastructure as code with CDK.
• CI/CD and release automation (semantic-release or equivalent).
• Production database experience (Postgres).
• Experience integrating with third-party systems such as dealership management systems (DMS), scheduling platforms, and CRMs, or comparable enterprise API integration experience.
• Obsesive about testing, observability, and reliability.

Responsibilities

• Own your design, implementation, deployments, and live-site health.
• Write code that integrates across the full conversational AI stack: speech-to-text, text-to-speech, LLMs, and telephony systems.
• Optimize the real-time audio pipeline for low latency and high-quality results.
• Own the observability platform end to end: distributed tracing on self-hosted LangFuse, CloudWatch dashboards and alarms, and LLM cost attribution.
• Build resilience into live-site systems: circuit breakers, multi-provider LLM failover, and retry and backoff strategies that degrade gracefully under partial failure.
• Design event-driven, cross-account AWS plumbing (EventBridge and SQS) that moves data reliably between services.
• Deliver Infrastructure as Code (IaC) with AWS CDK across containerized and serverless architectures, and own the release-engineering path: semantic-release, monorepo versioning, and cost-allocation tagging.
• Deliver fault-tolerant, highly available telephony integrations with comprehensive error handling.
• We are an AI-first engineering team, and we expect you to work fluently with AI coding agents as part of your daily workflow.
• We move quickly and confidently by investing in code quality, automated tests, and high-value code review feedback.

Skills

TypeScript

Node.js

AWS

CDK

CI/CD

PostgreSQL

LLM integration

Observability

Testing

Telephony/SIP

Education

CS degree or equivalent

Tools

LangFuse

AWS CDK

CloudWatch

EventBridge

SQS

Job description

Call Box is building a high-performance, AI-native engineering organization. This individual contributor role involves shipping and owning your product, designing features, writing production code daily, and solving hard problems in real-time AI systems.

We are creating a conversational voice AI system for the automotive industry, processing real-time voice AI calls at scale for thousands of dealership customers.