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Job
· Senior
Data Engineer - Oracle to PostgreSQL Re-Platform
Data Engineer
• Senior
• Remote
• Full-time
•
EU/EMEA
OpsBrasil is hiring a senior Data Engineer to own end-to-end delivery of a production LLM agent, taking it from read-only insight toward supervised action, while re-platforming from Oracle to PostgreSQL.
Stack
Responsibilities
- ▹Own end-to-end delivery: take a production LLM agent from requirement to production deploy, defending architecture and trade-offs with the client
- ▹Build and harden agent orchestration (LangGraph/LangChain or equivalent) — routing, tool-calling, planning, synthesis, state management
- ▹Integrate tools over MCP and maintain a growing tool surface, including BM25, hybrid, or vector retrieval
- ▹Run models on AWS Bedrock and Bedrock AgentCore — model selection/routing, guardrails, memory, regional residency
- ▹Build the evaluation harness (golden sets, LLM-as-judge, CI quality gates) and instrument the system with OpenTelemetry for token, cost, and latency attribution
- ▹Drive down cost and latency through model routing, prompt caching, payload pruning, and parallelizing independent calls
- ▹Design and stage safe write-actions with least-privilege permissions, human-in-the-loop approval, plan versioning, audit trail, and rollback
Requirements
- ▹5+ years in software engineering, at least 2 at a senior level
- ▹Strong Python in production, comfort with TypeScript or Go when needed
- ▹Hands-on LLM application engineering: prompt design, tool/function calling, structured output, context management, token budgeting
- ▹Agent orchestration experience with LangGraph, LangChain, or hand-rolled orchestration
- ▹Managed LLM/agent platform experience in production: AWS Bedrock, Google Vertex AI, or Azure AI Foundry
- ▹Evaluation, retrieval & observability experience: eval harnesses, golden/reference sets, vector or hybrid search in production, OpenTelemetry-based distributed tracing
- ▹Production AWS, CI/CD & IaC experience, including Terraform in production
- ▹Working English, comfortable defending system design on client calls
Soft skills
Ownership and accountability for production outcomesAbility to defend technical decisions directly to the clientComfortable working beyond ticket execution, proposing and defending solutions
Languages: Angol: Középfok
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