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Guilherme
Antunes/

Software engineer. From prototype to deploy: interface, API, data, cloud, automation and security.

Project
Guilherme Antunes
Revision
B · EN
Discipline
Software engineering
São Paulo
Scope
Full-Stack · DevOps · AI
Status
Available

Descriptive memo

For five years I have been turning ideas into software in production, from corporate platforms to automations that save hours of human work. Trained in Systems Analysis and Development at Fatec Guarulhos, I now work as DevOps at an AI pre-sales startup, combining back-end, front-end, cloud and automation. And I keep going deeper into hacking, security and data science, because good engineers need to see the product from the inside and the outside.

5 yearsin production
40+projects delivered
Fatec + EtecSystems analysis · development
Leavo2025 — now
25technical credentials

From prototype to deploy

  1. Sketch

    Design that understands code

    I have an eye for UI and a hand for CSS. Interfaces that aren't just beautiful, they're thought through.

  2. Wireframe

    Clear communication

    I write code for humans and explain technical decisions to the business. No needless jargon.

  3. Component

    End-to-end engineering

    From the database schema to the UI pixel, I deliver complete products, with no third parties in between.

  4. Integration

    Automation where it hurts

    Pipelines, scripts and AI agents that turn repetitive work into an invisible routine.

  5. Infra

    Performance by default

    A sharp stack, well-designed caching, predictable infrastructure. Speed isn't a bonus, it's the baseline.

  6. Deploy

    Security considered early

    Hardening, OWASP, tax audits. I build with the mindset of someone who also knows how to break things.

Work

Systems in production.

Platforms and products where I signed the engineering, the architecture or the technical leadership. Each one comes in as a project and leaves as what is live.

Leavo screen

In production

SaaS · AI pre-sales · 2025

Leavo

AI platform for pre-sales automation: a conversational layer that nurtures, qualifies and moves leads forward, continuously and naturally.

Year
2025
Category
SaaS · AI pre-sales
Stack
Next.js · OpenAI API · Node.js · PostgreSQL · Meta API
Volungo screen

In production

Platform · Volunteering · 2022

Volungo

Social engagement platform.

Year
2022
Category
Platform · Volunteering
Stack
React · Node.js

Bill of materials

Chosen for the task, not the trend.

Languages

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Front-end

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Back-end

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  • ×4
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DevOps & Cloud

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Data & AI

  • ×1
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Path

Parallel lines.

  1. 2025 — now

    DevOps with AI · Leavo · AI pre-sales platform

    Infrastructure and operations focused on AI: deploy pipelines, observability, agent automations and orchestration of conversational workloads in production.

  2. 2023 — 2025

    Full-stack developer · Basis

    Building and evolving web applications, integrating interfaces, business rules and databases.

  3. 2023 — now

    Full-stack engineer · DevOps · BranchStack · Consultancy & software house

    Technical leadership on full-stack deliveries for enterprise clients. Cloud architecture, pipelines, integrations and legacy system refactoring.

  4. 2022 — 2023

    Full-stack developer · Esphere Consultoria

    Corporate platforms, APIs, quotation portals and accounting and tax automations for B2B clients.

  5. 2021 — 2022

    Web developer · Independent projects & freelance

    Custom systems, e-commerce, social platforms and Python automations for small and medium businesses.

  6. 2019 — 2024

    Student · Etec → Fatec · Systems Development & Analysis

    Foundations in software engineering, networking, security and infrastructure, reinforced with AWS, Oracle, IBM, Cisco and other certifications.

Inspection report

25 technical credentials.

Issued by Cisco, Oracle, IBM, AWS, NASA, GitHub and others. Each one with the issuer's verification link, where there is one.

Items
25
Issuers
9
Verified
23/23
Method
Credly · Oracle Education

Education

  • Software Engineering Applied to Artificial Intelligenceongoing

    UNIPDS-Anhanguera · Graduate degree · Lato sensu

  • Healthcare Data Analyticsongoing

    PUC · Graduate degree · Lato sensu

  • Database Systemsongoing

    Uninter · Bachelor · Technologist

  • Systems Analysis & Development

    Fatec Guarulhos · Bachelor · Technologist

  • Systems Development

    Etec · Technical education

23 of 25 with public verification. The other 2 show the issuer's image, without a link.

Contact · new sheet

What's the next
system?

I reply within 24 hours. Quotes, partnerships, technical consulting or a good conversation about engineering.

Revision2026
StatusPending
EngineerGuilherme Antunes