Web engineering that performs, converts, and ranks.
I'm Tiago Castro. For more than 4 years I've built full-stack web software — from database to pixel — for high-traffic e-commerce and enterprise software. React, Node.js, and Java/Spring Boot.
I don't write code in a vacuum. The problem comes before the editor.
I started on the web from the side that shows the most: HTML, CSS, and JavaScript faithful to the design and to the user, with a UI/UX focus. More than four years later, the work expanded — APIs in Node.js and Spring Boot, data modeling, deploys to Azure with CI/CD pipelines. The obsession stayed the same: software that loads fast, does exactly what the product promises, and that Google understands.
I work with React, Node.js and the JavaScript ecosystem, and also with Java + Spring Boot when the backend asks for more weight. I've shipped high-traffic e-commerce sites at an agency, and now I build enterprise software in consulting — two opposite schools that taught me to balance delivery speed with technical solidity.
Performance, accessibility, and SEO enter the conversation from the first commit — not as a final pass.
Four years. Two environments. The same obsession.
Fast agency, solid consulting — two schools that teach you to ship frontend faithful to the design and backend that handles real load.
- 01PeriodNov 2024 — Presentcurrent
SysMap Solutions
/ Mid-level Full-Stack DeveloperEnterprise software consultancy focused on automation and AI.
- REST APIs with AI integrations to automate and add intelligence across application flows.
- Front-end React + TypeScript interfaces focused on UI/UX and responsiveness.
- Back-end Node.js and Java/Spring Boot with efficient cross-layer integration.
- AI tooling GitHub Copilot and Claude to speed up development.
- 02PeriodMay 2022 — Oct 20242 years, 6 months
ePlus
/ Front-End DeveloperAgency specialized in high-traffic e-commerce.
- Delivery frontends for 8+ e-commerce sites on VTEX and headless platforms, including Black Friday campaigns.
- Lighthouse lifted Performance from 62 to 94 on the home of one of the largest stores in the portfolio, with an 18% gain in mobile conversion.
- Pixel-perfect dozens of landings shipped from Figma under campaign deadlines.
Selected work, with metrics that matter.
Two projects that cover the essentials — my portfolio and a complete frontend course. Each one with a clear focus: presence and training.
- 0101
tiagocastro.dev
Portfolio · 2026Bilingual, static site optimized for technical SEO — written in Astro with 0KB of JS by default.
StackAstro 6 · Tailwind v4 · TypeScriptResult100/100 LighthouseView sourceBilingual, static site optimized for technical SEO — written in Astro with 0KB of JS by default.
- 0202
Aprenda Frontend
Course · CurrentFrontend course that starts on the web, moves through HTML, CSS, JS/TS and React, and ends with automated tests and next steps.
StackWeb · HTML · CSS · JS/TS · React · TestingResultComplete curriculum, from zero to the next stepView courseFrontend course that starts on the web, moves through HTML, CSS, JS/TS and React, and ends with automated tests and next steps.
Foundation in the classroom. Fluency in production.
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Systems Analysis and Development
IFTM Campus Patrocínio
In progressExpected · 2026 -
Technical High School in Computer Maintenance and Support
IFTM Campus Patrocínio
2017 — 2019Completed
Let's build something that actually performs.
If you're building something where performance, design fidelity, and user experience truly matter — let's talk.
- LinkedIn /in/tiagosouzadecastro
- GitHub @tiagosouzac