# Edmar Barros

> Staff Software Engineer, Brazil · Remote. Personal site with a CV, project write-ups and a blog, in English and Brazilian Portuguese.

Staff Software Engineer with 10+ years building and operating production-grade distributed systems, most recently building AI-driven growth tooling. I tie engineering work to business outcomes: opened a self-serve revenue stream with Stripe subscriptions, improved an unbalanced Elasticsearch cluster to cut its cost by 41%, halved new-engineer ramp-up time and reduced customer onboarding from 2 weeks to 1 day. Specialized in backend architecture (monolith-to-microservices), cloud infrastructure (GCP, AWS, Terraform, Kubernetes), CI/CD and data platforms (PostgreSQL, Kafka, Elasticsearch, BigQuery).

## About

- [CV](https://edmarbarros.com/cv): experience, skills and education. Companies and their backers: Quander (Accel); Vendoo (YC W22); Paerpay (Techstars); Citruslabs (Techstars); cloud.IQ (PayPal).
- [CV as a PDF](https://edmarbarros.com/cv/EdmarBarros_CV.pdf): the same CV, ready to download.
- [Contact](https://edmarbarros.com/contact): the contact form.

## Projects

- [MCP server for this site](https://edmarbarros.com/projects/side/mcp-server): Oct 2026. A public MCP server that lets an AI assistant answer questions about my CV, skills with evidence, projects and writing in English and Portuguese, and draft a message to me that reaches my inbox only through my contact form.
- [Quander (Hypesonic) - Senior Software Engineer](https://edmarbarros.com/projects/work/quander): May 2026 - Oct 2026. Built the agent work and the ad platform around it at Hypesonic, Quander's AI growth product: the Sonic agent's tracing, sessions and tools, a rebuilt Meta sync, the ad launcher, self-serve billing, observability and a video editor.
- [Vendoo - Staff Backend Engineer](https://edmarbarros.com/projects/work/vendoo-staff): May 2024 - May 2026. Led the monolith-to-microservices migration on Kafka, owned the GCP/Kubernetes infrastructure and cut Elasticsearch cost by 41%.
- [Vendoo - Senior Backend Engineer & Tech Lead](https://edmarbarros.com/projects/work/vendoo-tech-lead): Jun 2023 - Apr 2024. Led the engineering team end-to-end - release cycles, CI/CD quality gates, data models, and API contracts - while growing the engineers on the team.
- [Paerpay - Senior Backend Engineer](https://edmarbarros.com/projects/work/paerpay): Jul 2022 - May 2023. Scaled payment-processing backends on Firebase/GCP and built a real-time transaction pipeline on BigQuery for restaurant partners.
- [EMB Software Engineering - Senior Backend Engineer & Architect](https://edmarbarros.com/projects/work/emb): Sep 2021 - Apr 2022. Delivered cloud-native backends on AWS for data-heavy client applications using an API-first architecture and Terraform IaC.
- [Citruslabs - Senior Backend Engineer](https://edmarbarros.com/projects/work/citruslabs): Jan 2019 - Sep 2021. Database-normalization work that cut customer onboarding from 2 weeks to 1 day; automated patient-funnel pipelines; built CI/CD on AWS.

## Blog

- [How I turned this site into an MCP](https://edmarbarros.com/blog/site-as-mcp): A static Astro site can't run a server, so I exported its content as JSON and put a small Cloudflare Worker in front of it. Now any AI assistant can answer questions about my CV, projects and writing.
- [Hello, world](https://edmarbarros.com/blog/hello-world): Why I'm starting this blog, what you can expect, and a quick note on languages.

## Ask an assistant about him

- [MCP server](https://api.edmarbarros.com/mcp): a remote MCP server that answers from this site. It reads the CV, skills with evidence, projects and posts, and can search them. It also drafts a message to him that the person reviews and sends on the contact page. No sign-in is needed.
- [How to connect](https://edmarbarros.com/#mcp): setup steps for Claude, ChatGPT, Cursor, VS Code and other clients.
- [For agents](https://edmarbarros.com/agents): the tools, the design choices, the JSON export and how the search is tested.

## Optional

- [Português](https://edmarbarros.com/pt): the same site in Brazilian Portuguese.
- [RSS feed](https://edmarbarros.com/rss.xml): blog updates.
- [Sitemap](https://edmarbarros.com/sitemap-index.xml): every page.