Maicon Vieira

Available for freelance work and new opportunities

Custom web systems, from code to server

I build websites and systems for small businesses and take care of what comes after: hosting, security, backups and monitoring. Day to day, I work as an Infrastructure Technician at Semantix, keeping critical production environments running, and I study Systems Analysis and Development.

Get in touch → See Projects → Read the Blog →

What I do

Websites and landing pages

Fast, responsive pages that present your business and bring in customers, with domain and HTTPS set up.

Examples: this website and Maciel & Morais (archived) →

Custom systems

Inventory, point of sale, records, operations control: the system a spreadsheet can't handle, built around your process.

Examples: BookCase and Yard Control →

Hosting and maintenance

I put it online and keep it running: server, deployment, backups, security updates and monitoring.

How I do it for BookCase →

See services and get a quote →

About me

I'm a developer who also runs production infrastructure. That combination is what sets me apart: I don't just hand over code, I deliver a system that is live, with automated deployment, backups and monitoring.

At Semantix, I monitor critical production environments, including SAP, with Zabbix, Datadog, Grafana and Control-M. I investigate incidents down to the root cause and work in Portuguese and English with international teams. Before that, at Solus Software, I fixed production issues in PL/SQL, Delphi, PHP and JavaScript systems.

In my own projects I build end to end: BookCase, a management system running in production for used bookstores; a yard control app used by the team at a Localiza kiosk; and this website, with its blog, admin panel, cookie-free in-house analytics, job-search bot and automated CI/CD deployment.

From code to server I build, ship and maintain: one person accountable for the whole system.
Production-grade experience Monitoring, incident response and root-cause analysis in enterprise environments.
Real clients Systems used by real businesses, not just study projects.
Portuguese and English Clear communication with clients and teams in Brazil and abroad.

Articles

20/10/2026 Como montei a infraestrutura deste site: Flask, Docker, CI/CD e analytics sem cookies

Do site estático à aplicação Flask em contêiner, com deploy automático pelo GitHub Actions e um analytics próprio que respeita a privacidade de quem visita.

Read article (in Portuguese) → 20/10/2026 How I built and run this site: Flask, Docker, CI/CD and cookie-free analytics

A case study of my personal site: from static HTML to a containerized Flask app with automated deployments, tests in CI and in-house analytics that respect visitor privacy.

Read article (in Portuguese) → 18/10/2026 Integração de IA a documentação interna e impactos de uma documentação desorganizada

Organizando a documentação interna para melhorar a agilidade e o desempenho interno, garantindo a melhor entrega da operação, e como a Ia pode auxiliar nesse processo.

Read article (in Portuguese) → 05/09/2026 BookCase: construindo um sistema de gestão para sebos com Flask e PostgreSQL

Case study técnico: como projetei estoque, cadastro de livros e um caixa com PDV para sebos, e os desafios de manter tudo consistente em produção.

Read article (in Portuguese) → 20/08/2026 VMs mais baratas: como escolhi a Interserver para meus projetos

Comparei DigitalOcean, Vultr, Linode, Oracle Cloud e Contabo antes de decidir onde hospedar o BookCase — e por que a Interserver ganhou no custo-benefício.

Read article (in Portuguese) →

Skills · where I've used them

Python · Flask BookCase and this website, including the blog, admin panel and in-house analytics

JavaScript · TypeScript Yard Control (Firebase), project front-ends and production fixes at Solus

SQL · PostgreSQL · PL/SQL Inventory and sales modeling for BookCase; database queries and maintenance at Solus

Linux · Docker · nginx Self-managed server running several production systems, HTTPS, Docker deployments and backups

Zabbix · Datadog · Grafana Monitoring critical production environments at Semantix

PHP · Delphi Supporting and fixing corporate systems at Solus

PHP PL/SQL Firebase Git HTML & CSS Delphi C

Currently growing into

Gradually moving toward DevOps — automating more of my own infrastructure and deployment workflow.

DevOps Cloud

Experience

Semantix

08/2026 — Present

Technical Integrator Cloud Ops

Incident investigation and resolution in production
Critical infrastructure monitoring with Zabbix, Datadog, Grafana and Control-M
SAP environment

› See more

I work on the front line of support for critical production environments, covering everything from initial incident triage to root-cause investigation alongside application and infrastructure teams.

Highlights

Working in a fully bilingual environment, documenting and communicating incidents in Portuguese and English for international squads
Day-to-day tools: Zabbix, Datadog, Grafana, Control-M and SAP environment

Solus Software

11/2025 — 07/2026

Systems Analyst — Technical Support

Corporate system support and ticket handling
Incident investigation and resolution in production
Bug fixing in PL/SQL, Delphi, PHP and JavaScript applications
Database queries and maintenance with PL/SQL
Fixes validation and integration testing
Collaboration with development and QA teams

› See more

I worked on supporting internal corporate systems, combining direct technical support with production code fixes, always alongside the development and QA teams.

Highlights