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Nexus Flux

@nexusflux

Senior full-stack & data engineer, 13+ years building cloud data platforms, AI/LLM pipelines, and scalable APIs. Remote, LATAM/US time zones.

Brazil

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Full-stack and data engineer with 13+ years of experience designing cloud-native platforms, data pipelines, and AI-powered applications across AWS, GCP, and Azure. I build end-to-end systems: ETL/ELT and lakehouse architectures (Databricks, Snowflake, dbt, Airflow, Spark), production microservices and REST APIs (Node.js/NestJS, Python/FastAPI), and modern React/Next.js front-ends.

Over the past few years I've focused on LLM and RAG systems, shipping LangChain and LangGraph multi-agent workflows, vector-search pipelines, and Claude/OpenAI integrations that turn unstructured data into structured, reliable features. I care about clean architecture, strong test coverage, and CI/CD automation that lets teams ship with confidence.

I've delivered for US-based companies as a remote contractor, mentoring engineers, leading architecture and code reviews, and presenting roadmaps to stakeholders. Fluent in English (C1) and based in Brazil, I work comfortably across LATAM and US time zones.

Experience

Work history, roles, and key accomplishments

Senior Full-Stack & AI Engineer

Stedi

Oct 2023 - Mar 2026 (2 years 5 months)

Built full-stack web applications using React and TypeScript with Node.js (NestJS) back ends, designing and consuming RESTful APIs. Delivered AI features with Claude and OpenAI APIs by building RAG pipelines for semantic search, and applied security via token-based authentication, RBAC, and OWASP-aligned validation and dependency scanning.

Full-Stack Engineer

Data Squared Inc.

Jul 2020 - May 2022 (1 year 10 months)

Developed React front ends and Node.js (NestJS) back ends on GCP Cloud Run, exposing RESTful and GraphQL endpoints. Implemented event-driven processing with Kafka and integrated Hugging Face inference models for text classification while maintaining CI/CD and automated tests.

Senior Full-Stack Developer

Chameleon

Feb 2017 - Jan 2020 (2 years 11 months)

Built Node.js microservices and React internal dashboards for a product-analytics platform, including Python (FastAPI) back-end services and REST APIs. Deployed containerized services on AWS EKS using Docker and Kubernetes, tuned reporting queries to improve performance, and integrated third-party SaaS APIs via REST and webhooks.

Node.js microservices React Python fastAPI REST APIs PostgreSQL MongoDB Docker Kubernetes Amazon EKS Terraform Reporting query optimization Composite Indexes Materialized Views CI CD GitHub Actions Pytest Third party SaaS APIs Webhooks

Backend Developer

Jampp

Aug 2014 - Jun 2016 (1 year 10 months)

Developed Python ETL services that pulled from REST APIs and partner feeds into PostgreSQL and Redshift for analytics. Built AWS Lambda functions for event-driven processing, and also developed Java (Spring Boot) and PHP/Laravel back-end and web applications while maintaining CI/CD in an Agile environment.

Python ETL REST APIs PostgreSQL Redshift AWS Lambda Event driven processing S3 triggered fan out Java Spring Boot REST Integration PHP Laravel CI CD Jenkins Agile team

Web Developer

LINE MAN Wongnai

Aug 2011 - Oct 2013 (2 years 2 months)

Developed full-stack web applications using Node.js (Express) and PHP, building RESTful APIs and relational database schemas for listing and content portals. Implemented responsive front-end interfaces with HTML5/CSS3 and JavaScript (jQuery), and maintained custom WordPress themes and plugins.