Full-Stack & Mobile Developer

I build
products
that ship.

From concept and architecture to App Store deployment. 5+ years building end-to-end — web, mobile, and AI.

...

Developer.
Product builder.
Architect.

I'm a full-stack developer who doesn't stop at the API. I take products from the first whiteboard sketch to a live app in someone's pocket — owning architecture, backend, frontend, mobile, and deployment along the way.

Currently at Ocyan in the Oil & Gas sector, where I lead the architecture of a business-critical system that supports the company's entire production operations.

Outside of work, I design and ship my own products end-to-end from database schema to App Store release. I also hold a postgraduate degree in AI & Machine Learning and build computer vision and NLP projects on the side.

🇧🇷
Portuguese Native
🇺🇸
English Fluent
🇷🇺
Russian Intermediate
🇨🇳
Mandarin Basic
Concept Product thinking, requirements, architecture decisions
Design System design, DB modeling, UX flows
Backend APIs, business logic, integrations, databases
Web Frontend interfaces, dashboards, admin panels
Mobile iOS & Android apps with Ionic and Flutter
Deploy Cloud infrastructure, CI/CD, monitoring
Shipped Products

Built end-to-end.
Check some out below.

🪶
Corporate Finance
Leve

Corporate expense reimbursement platform with configurable approval workflows, spending policies, cost center management, and analytics dashboards.

R$1M+ reimbursed
Web iOS Android
🧭
Corporate Logistics
Rumos

Executive transport and fleet management platform. Real-time vehicle tracking, fleet maintenance, driver coordination, and trip management.

Web iOS Android Real-time
💑
Consumer Mobile
Dvoi

The shared home base for couples. Manage joint expenses with automatic splitting and settle-up, keep synced shopping and to-do lists, and never miss a date with a shared calendar and smart reminders.

Web iOS Android Push Notif.
🧾
Group Finance
Ouricin

Splitwise-style expense splitting for groups — trips, roommates, and friends. Create groups with shared currency, join by invite code, track who owes what, and settle up with Pix key integration.

Web iOS Android Push Notif.
Experience

5+ years in
production environments.

Apr 2024 – Present Ocyan Oil & Gas
IT Analyst — Full-Stack Developer
  • Drove the architecture and technical foundation of a ground-up reconstruction of a business-critical internal system, defining the stack, database design, and API structure.
  • System is core to Ocyan's production operations, replacing a legacy platform and impacting workflows across departments.
  • Established coding standards, API structure, and database conventions that became the baseline for the engineering team.
  • Supported junior developers by sharing best practices and reviewing code.
Sep 2023 – Apr 2024 RINA Oil & Gas
IT Analyst
  • Provided IT support and systems analysis for a project at PETROBRAS (Sondas).
Jan 2023 – Aug 2023 DOF Oil & Gas
IT Project Analyst
  • Provided IT support and systems analysis for internal projects.
  • Developed solutions using Microsoft Power Apps and supported the TOTVS (RM) ERP platform.
Aug 2019 – Jan 2023 Etesco Oil & Gas
IT Support & Developer
  • Managed the IT department, overseeing accounts, contracts, software licenses, and asset inventory.
  • Provided helpdesk support to end users, resolving hardware and software issues.
Stack

The tools
I ship with.

Core Stack
PHP Laravel JavaScript Symfony HTML/CSS Bootstrap
Mobile
Ionic iOS Android C# ASP.NET
Data & AI
Python Machine Learning TensorFlow Power BI OpenCV MediaPipe YOLO NLP
Databases & Cloud
MySQL PostgreSQL SQLServer SQLite Azure Power Apps
Contact

Let's build
something great.


kezia.campos@icloud.com