Backend Developer - Pleno

Backend Developer - Pleno

Collaborate with data scientists and ML engineers to understand requirements for ML / LLM features. Design, implement, maintain, improve, and document backend systems (Python, FastAPI) for ML / LLM features. Manage and optimize databases (Postgres, MongoDB, Milvus) for application storage. Improve observability and reliability for distributed, async workloads (structured logging, metrics, retry / backoff strategies, traces). Help maintain and orchestrate containerized development workflows (uv, Docker, Docker Compose, Kubernetes) and CI checks. Raise the bar for testing (unit + integration) to ensure high code quality and reliability. Improve the local development experience for the team by establishing and promoting Python-based development standards and best practices. Integrate and optimize calls to LLM APIs (OpenAI) and agentic frameworks (OpenAI Agents SDK). Mentor other engineers and drive architectural decisions.

Requirements

• Experience in backend engineering, specifically in building production services, with over 2 years of expertise in working with asynchronous Python.
• Extensive Python knowledge : async / await, typing system, modern Pydantic (v2), and testing frameworks (pytest).
• Production experience building RESTful APIs with FastAPI and ASGI servers (uvicorn).
• Solid operational and debugging skills for async systems and distributed services.
• Strong familiarity with Postgres and MongoDB databases.
• Experience with vector search systems (Milvus, FAISS, Pinecone) and embedding pipelines.
• Experience with message queues, background processing, and patterns for batch processing, idempotency, and retries.
• Practical experience integrating with OpenAI or other LLM providers.
• Comfortable working with containerization technologies (Docker, Docker Compose, Kubernetes).
• Familiarity with AWS services (EKS, ECS, S3).
• Familiarity with CI / CD pipelines (Jenkins, GitHub Actions).
• Good communication skills and ability to work effectively in a remote team environment.
• Good English proficiency (reading, writing, speaking).

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