.HS
Open to opportunities · Available for hire

I'm a software engineerwho builds reliableand user-friendly systemsthat teams trust.

4+ years turning ideas into production-grade software. I work across the full stack — from cloud architecture to pixel-perfect UI — for clients in retail and civil construction.

Find me on LinkedIn, GitHub, or just send me an email.

Stylized portrait of Hugo Sergio
Hugo · since 2021
JavaSpring BootReactNode.jsTypeScriptPython.NETAWSAzureGCPDockerLinuxJavaSpring BootReactNode.jsTypeScriptPython.NETAWSAzureGCPDockerLinuxJavaSpring BootReactNode.jsTypeScriptPython.NETAWSAzureGCPDockerLinux
— About

I'm a Software Engineer based in Brazil, currently working at Kyndryl as Associate Technical Support, supporting clients in retail and civil construction.

Before that, I spent time at IBM as an Application Developer, building software for retail customers at scale. Two big shops, one shared obsession: shipping clean, maintainable code that solves real problems.

I move comfortably between backend (Java/Spring Boot, .NET, Python, Node), frontend (React, TypeScript, modern JS), and cloud (AWS, Azure, GCP). Docker and Linux are home — I treat infrastructure as part of the product.

— ExperienceA glimpse of the journey

Two companies.
One relentless craft.

2025Now · 9moRemote · BR

Associate Technical Support

Kyndryl·Full-time

Level-2 support for enterprise clients in retail and civil construction. Investigation, fixes, and operational routines — keeping critical systems up while quietly improving them.

  • CMS & e-commerce support across WordPress, Magento and modern JS stacks on AWS for client @ Tigre.
  • Sustained critical retail systems at GPA — POS checkouts, fiscal document correction (NF), and a complementary-assortment recommendation service.
  • Daily routines on Linux servers: cron, bash, and container workloads with Docker/Podman across AWS and on-prem.
  • WordPress
  • Magento
  • Nuxt.js
  • .NET
  • Java
  • Spring Boot
  • React
  • Next.js
  • AWS
  • Docker
  • Oracle
  • MariaDB
  • Linux
IBM2023 — 2025 · 2y 4moSão Paulo · Remote

Application Developer

IBM·Full-time · GPA

Application support, data flow analysis, and development of fixes for critical retail systems at GPA (Grupo Pão de Açúcar).

  • Level-2 support for offers, promotions and pricing — root cause analysis and corrective implementations.
  • Developed and shipped fixes for system failures, ensuring business continuity during peak operations.
  • Maintained and administered Linux servers hosting critical applications; monitored and executed mainframe (z/OS) routines.
  • On-call shifts for critical operations, including on-site support for Black Friday.
  • Java
  • SQL
  • Oracle
  • PostgreSQL
  • Linux
  • GCP
  • Docker
  • Elasticsearch
IBM2023 · 7moInternship

Early Associate — Software Developer

IBM·Internship · GPA

Retail sector at GPA — pricing, offer and move-to-cloud team. First steps into production engineering.

  • Worked inside the Scrum & Kanban rituals on a cross-functional squad.
  • Built features in Java + Spring Boot and supported legacy z/OS systems through ServiceNow.
  • Authored integration tests and managed CI/CD pipelines through Azure DevOps.
  • Java
  • Spring Boot
  • z/OS
  • ServiceNow
  • Azure DevOps
  • Scrum
— ProjectsA few things worth showing

Things I've built, broken, and fixed.

A curated shelf of personal and open-source work. Client work lives under NDA, so the cards below are placeholders I'll swap as I ship new things.

Web · Side projectComing soon
2026

Personal Project — Placeholder

A small, opinionated side project I'm building to scratch my own itch. More details once it stops being embarrassing — for now, this card holds the spot.

  • TypeScript
  • React
  • Next.js
Soon →Placeholder
CLI · ToolingComing soon
2026

Personal Project — Placeholder

A developer tool I keep wishing existed. Clean CLI, sensible defaults, zero telemetry. Drop-in for the workflows I run every day.

  • Node.js
  • TypeScript
Soon →Placeholder
OSS · ContributionIn progress
TBD

Open Source — Placeholder

An open-source contribution I'm actively working on. Documentation and a public repo will land here once the first release is shipped.

  • Open source
  • TBD
Tracked →Placeholder
Web · Study toolOpen source
2026

Study Guides Hub

Portal de guias de estudo interativos para certificações AWS e tecnologias como Quarkus.

  • React
  • TypeScript
  • Vite
Acessar →Live
Notes · WritingComing soon
TBD

Writing — Placeholder

Technical notes and post-mortems from the work I do day to day. Long-form, opinionated, and indexed by tag so future-me can actually find them.

  • MDX
  • Notes
Drafts →Placeholder

More on GitHub · Always open to showcasing something new here.

— The toolbox

Languages, frameworks &clouds I'm fluent in.

Languages
  • Java
  • Python
  • TypeScript
  • JavaScript
  • C# / .NET
Frameworks
  • Spring Boot
  • React
  • Node.js
  • Express
  • REST APIs
Cloud
  • AWS
  • Azure
  • GCP
  • Docker
  • Linux
How I work

Pragmatic over precious. I write code other humans can read, document the why, and treat production like a place my code actually has to live.

— Let's talk

Have a project, an idea,
or a weird problem?

I'm always open to new opportunities, conversations, and collaborations. Drop a line — I read everything.

contato.dev.hugosergio@gmail.comLinkedInGitHub