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Miguel Pereira

@miguelpereira2

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Senior AI Engineer specializing in production LLMs, RAG, AI agents, and backend systems for scalable, observable AI.

Brazil

Message

What I'm looking for

I’m looking for a role where I can productionize LLM/RAG/agentic systems with strong evaluation and observability, while designing high-performance backend services and automation for reliable, scalable AI delivery.

I’m a Senior AI Engineer with 8 years of experience delivering production AI, backend platforms, and distributed systems. I focus on productionization, evaluation, observability, performance, and automation across LLM, RAG, and AI agent workflows.

At Health Catalyst, I productionized LLM/RAG/agentic workflows, cutting knowledge-retrieval effort by 50%+. I built Python/FastAPI AI services using vector search and PostgreSQL, improving response latency by ~30%, and strengthened AI evaluation and observability to raise evaluated response quality by ~20%.

Earlier, I led cloud-native backend and AI services at THINKON, improving API throughput by ~35% through async processing, caching, and database optimization. At AND DIGITAL and FCAMARA, I delivered scalable REST APIs and production releases, reducing API latency by ~25% and repetitive engineering effort by ~30% through development, testing, monitoring, and infrastructure automation.

Experience

Work history, roles, and key accomplishments

Senior AI Engineer

Health Catalyst

Jun 2025 - Jun 2026 (1 year)

Produced LLM, RAG, and agentic workflows, reducing knowledge-retrieval effort by 50%+. Built Python/FastAPI AI services using vector search and PostgreSQL, lowering response latency by ~30%. Improved evaluated response quality by ~20% through AI evaluation and observability.

LLM RAG Python fastAPI Vector Search PostgreSQL AI Evaluation Observability Response Time Optimization

Senior Software Engineer

ThinkOn

Sep 2023 - Mar 2025 (1 year 6 months)

Developed cloud-native backend and AI services, improving async processing, caching, and database performance to raise API throughput by ~35%. Automated AI/data workflows processing 50K+ records/documents, cutting manual effort by ~60%. Implemented CI/CD, automated testing, monitoring, and infrastructure automation, reducing deployment failures by ~25%.

Caching Database Optimization AI Workflow Automation Automation CI CD Automation Testing Monitoring Infrastructure Automation

Backend Software Engineer

And Digital

Aug 2020 - Jun 2023 (2 years 10 months)

Built scalable REST APIs and backend services, improving query/service performance to reduce API latency by ~25%. Delivered integrations and workflow automation, cutting manual processing effort by ~40%. Contributed 10+ production backend features across cloud, APIs, databases, and testing.

REST APIs Backend Services Query Optimization API Performance Integration Workflow Automation APIs Databases Testing

Software Engineer

FCamara

Aug 2018 - Apr 2020 (1 year 8 months)

Developed web applications, APIs, and backend services, delivering 10+ production releases across multiple technology stacks. Optimized databases and backend components to improve application response times by ~20%. Created development and testing automation, reducing repetitive engineering effort by ~30%.

Web Applications APIs Backend Services Production Releases Database Optimization Backend Testing Automation