Senior Backend Engineer - Python

**About Hams.AI** At Hams.AI, we deeply understand voice AI agents \- how they think, speak, listen, and interact across systems. While real\-time voice conversations are a core part of what we do, our work goes far beyond that. We are building multiple ambitious and technically challenging projects where voice is deeply integrated with broader workflows, data, and intelligent automation. Our mission is to create human\-like AI agents that can operate across many touchpoints \-not only real\-time calls, but also the systems, logic, and intelligence that surround voice. Achieving this vision requires solving hard problems in scalability, reliability, orchestration, and backend infrastructure, and we are assembling a strong engineering team to make it happen. **What You’ll Do** * Design, build, and maintain scalable backend services * Architect, optimize, and maintain PostgreSQL and other relational database systems * Develop and optimize real\-time systems, including streaming pipelines, sockets, and asynchronous workloads * Implement and manage message brokers such as Redis, RabbitMQ, or Kafka * Design and maintain high\-performance caching layers using Redis or Memcached * Implement and operate a full observability stack, including: * Metrics, logs, and distributed tracing * OpenTelemetry, Prometheus, and Grafana * Ensure high availability, fault tolerance, and data integrity across services * Optimize database queries, indexing, transactions, and schema migrations * Handle production debugging, performance tuning, and incident response * Work closely with product, DevOps, and infrastructure teams **Who You Are** * 5\+ years of experience building production\-grade backend or full\-stack systems * Strong proficiency in Python and modern backend frameworks (FastAPI, Django, Flask) * Deep understanding of PostgreSQL and relational database design * Experience building real\-time or asynchronous systems (asyncio, streaming, WebSockets, sockets) * Hands\-on experience with message brokers and background processing systems * Strong grasp of caching strategies and performance optimization * Comfortable owning production systems end\-to\-end * Thrive in fast\-paced, startup environments **Nice to Have** * Experience with voice AI, telephony, WebRTC, or real\-time audio systems * Familiarity with AI/LLM\-powered platforms * Cloud infrastructure experience (AWS, GCP, Azure) * Containerization and orchestration (Docker, Kubernetes) Job Types: Full\-time, Permanent Pay: R$15,000\.00 \- R$20,000\.00 per month