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Erick User

@erickuser2

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Senior Full Stack Engineer specializing in Data and LLM systems, delivering production AI features.

Brazil

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What I'm looking for

I seek roles building production AI/LLM systems with ownership of ingestion, retrieval, and evaluation, strong DevOps, collaboration with ML/product teams, and emphasis on reliability, observability, and secure deployments.

I am a senior full stack engineer focused on building data and LLM systems that power production AI features across parsing, extraction, retrieval, and evaluation.

I design and ship APIs and React/Next.js UIs on AWS and Kubernetes, using Python and TypeScript to deliver scalable, observable systems with Terraform-driven infrastructure.

At LlamaIndex and previous roles I implemented multimodal RAG pipelines, optimized ingestion and inference, and built evaluation suites that improved routing accuracy, reduced token waste, and accelerated audits.

I collaborate closely with product and ML teams across regulated sectors, prioritize reliability and observability, and mentor engineers while driving CI/CD, monitoring, and secure deployment practices.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Engineer

Current

LlamaIndex

Jul 2023 - Present (2 years 8 months)

Designed and productionized data and LLM pipelines on AWS and EKS, delivering document classification, multimodal RAG, and retrieval systems that improved routing accuracy and reduced manual triage time while lowering token spend and latency percentiles.

Python TypeScript fastAPI React LlamaIndex RAG Embeddings Vector Search Terraform Kubernetes

Senior Software Engineer

BigBro AI

Sep 2020 - Jun 2023 (2 years 9 months)

Built a real-time sports analytics platform with React dashboards and GPU inference backends, optimizing inference pipelines and streaming telemetry to enable sub-second live insights and improved tracking reliability.

Python PyTorch Onnx TensorRT fastAPI React Kafka Redis Kubernetes

Software Engineer

Urban Influence

Mar 2018 - Aug 2020 (2 years 5 months)

Rebuilt a marketing automation SaaS into microservices with Vue.js and Python, launched real-time analytics and campaign builder features, and implemented A/B testing that boosted client engagement by 15%.

Python TypeScript Vue.Js Redis REST APIs AWS Docker CI CD A B Testing

Software Engineer

Google

Feb 2015 - Feb 2018 (3 years)

Developed internal Python and Go services for Ads infrastructure, contributed to large-scale ETL and monitoring systems, and supported predictive bidding experiments to improve reliability and system observability.