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Guilherme Nicolaci
PT
Available for new projects

From idea to live,no nonsense.

I build web applications, integrations, and AI automation that turn business needs into reliable software.

Contact me
View projects

Portfolio

Projects

01 / 07
LiveProduct · AI

Echo English

An independent English-learning platform with exercises and AI-assisted conversation. Voice is disabled in the public deployment to avoid API costs; the remaining flows are available to explore.

  • Next.js
  • AI
  • Education
  • Voice
View full case study

Freelance projects

Websites, portfolios, systems — whatever the project needs.

I take freelance projects from idea to deployment, with clear scope, direct communication, and a solution shaped around real business needs.

  1. Websites and portfolios

    Responsive, fast, and accessible business websites, landing pages, and portfolios, with polished execution and attention to conversion.

  2. Custom systems

    Scheduling flows, client areas, internal dashboards, and other tools shaped around how the business actually operates.

  3. APIs and integrations

    Connections between platforms, external services, and data, with clear contracts, resilient workflows, and proper failure handling.

  4. AI automation

    Task automation, assistants, and reports where AI creates practical value while keeping control and traceability in the workflow.

Technologies I use to deliver

and whatever the project needs

TypeScriptReactNext.jsTailwind CSSHTML & CSSNode.jsPythonREST APIsGraphQLPostgreSQLRedisSQLPandasOpenAIClaudeGeminiCursorGitHub CopilotDockerLinuxVercelGitCI/CDVS CodeGitHubPostmanFigmaMivaShopify

Frontend

  • TypeScript
  • React
  • Next.js
  • Tailwind CSS
  • HTML & CSS

Backend

  • Node.js
  • Python
  • REST APIs
  • GraphQL

Data

  • PostgreSQL
  • Redis
  • SQL
  • Pandas

AI/Automation

  • OpenAI
  • Claude
  • Gemini
  • Cursor
  • GitHub Copilot

Infrastructure

  • Docker
  • Linux
  • Vercel
  • Git
  • CI/CD

Tools

  • VS Code
  • GitHub
  • Postman
  • Figma

E-commerce

  • Miva
  • Shopify

Results

Grow your business's reach.
Fast, accessible and easy to find.

The sites I build are designed to score 100 on Google Lighthouse tests: pages that load fast, work for everyone and rank better in search.

Contact me
guinicolaci.com
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Performance

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Accessibility

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Best Practices

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SEO

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Performance

Pages that open fast, even on 4G, without losing visitors to the wait.

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Accessibility

Contrast, keyboard and screen readers: the site works for everyone.

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SEO

Structure, metadata and speed that help Google show your business.

Experience

Professional experience
and education.

  1. 08/2025 — Present

    Software Engineer

    Automate Army

    • Full-stack work at Automate Army, a US-based company, across projects with different stacks and product needs.
    • Development of exclusive business systems, integrations, and automations focused on real operational problems.
    • Continuous improvement of an internal chatbot, refining flows and responses based on how teams use it.

  2. 2023 — 2025

    Systems Analysis & Development

    Fatec São Paulo

    • Continued studies in software development and systems analysis.
    • Advanced coursework in software engineering, systems, and development practices.

  3. 2022 — 2023

    Systems Analysis & Development

    Fatec Ipiranga

    • Started higher education in Systems Analysis and Development.
    • Built a foundation in programming, databases, and systems development.

About

End-to-end software development.

I'm Guilherme Nicolaci, a full-stack software engineer based in Brazil and working remotely with a US team. I'm currently part of Automate Army (Colorado, USA), where I build applications, complex integrations, and end-to-end automations.

Alongside my primary role, I build independent projects and tailored solutions. My approach combines product thinking with practical engineering, focused on building software that solves real problems and remains easy to maintain.

  • Architecture that evolves

    Clear APIs, well-defined components, and technical decisions that reduce the cost of change.

  • Purposeful automation

    Repetitive tasks become software when doing so reduces errors, saves time, and improves the workflow.

  • Production from the start

    Testing, observability, and reliability are part of delivery, not an afterthought.

Contact

Have a project or an opportunity?

I'm open to freelance projects, collaborations, and professional conversations. Share some context through the form or by email.