KoiamaDev
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Thiago Koiama · Full Stack Software Engineer

Development of web, mobile, and enterprise systems.

Bachelor's degree in Computer Science and an IT Technician qualification, with experience in software development, REST APIs, and databases using Flutter, Dart, Next.js, Node.js, PL/SQL, and Oracle Forms/Reports.

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  • Web systems
  • Mobile applications
  • Enterprise systems
  • APIs and databases
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About

Development with a complete view of the system.

I am a Full Stack Software Engineer with a bachelor's degree in Computer Science and an IT Technician qualification. My background combines systems development and maintenance, web and mobile applications, REST APIs, databases, technical support, and infrastructure. This multidisciplinary foundation helps me understand requirements, implement, test, maintain, and evolve solutions.

Diagram connecting code, interface, data, architecture, and operations.
01 · Education
Bachelor's degree in Computer Science
02 · Technical foundation
IT Technician
03 · Work
Web, mobile, REST APIs, and enterprise systems
04 · Technical perspective
Software, data, support, and infrastructure
Professional experience

A career in systems development and technology.

Professional experience in web and mobile development, REST APIs, Oracle enterprise systems, technical support, and infrastructure.

  1. 01

    Full Stack Software Engineer

    Solpi · Jundiaí-SP

    September 2025 — present

    Responsible for requirements gathering, architecture, development, deployment, and maintenance of a cross-platform operational management system with inventory, production, construction/sales, and shipping modules. The solution was built with Flutter for Windows and Android, with a Dart backend, MySQL on Amazon RDS, services hosted on EC2 with Nginx, email and WhatsApp integration through a Node.js microservice, and automatic application updates using builds stored on Amazon S3.

    • Development with Flutter, Shelf/Dart, Next.js, and Node.js.
    • Requirements analysis, architecture definition, implementation, and testing.
    • Solution maintenance and evolution, with source code versioning in Git.
  2. 02

    Freelance Web Developer

    Present

    Development of responsive landing pages for the professional presentation of brands, products, and services.

    • Implementation with Next.js and Tailwind CSS.
    • Attention to performance, cross-device compatibility, and user experience.
  3. 03

    Junior Systems Analyst

    Emulzint Zeelandia · Jundiaí-SP

    August 2024 — September 2025

    Development and maintenance of enterprise systems using Oracle Forms/Reports and PL/SQL.

    • Functional analysis and requirements gathering.
    • Preparation of technical and functional specifications.
    • Support for deployment, testing, and maintenance of internal systems.
  4. 04

    IT Intern - Systems

    Emulzint Zeelandia · Jundiaí-SP

    March 2024 — August 2024

    Support in the development and maintenance of internal systems with PL/SQL and Oracle Forms/Reports.

    • Bug fixes and functional adjustments.
    • Improvements to internal system routines.
  5. 05

    IT Intern - Help Desk/Support

    Emulzint Zeelandia · Jundiaí-SP

    September 2022 — March 2024

    On-site and remote technical support for users and assistance with the operational environment.

    • Configuration and preparation of equipment for local and remote use.
    • Preventive and corrective maintenance of hardware and software.
    • Assistance in resolving infrastructure incidents.
  6. 06

    IT Intern

    BM Bike · Itupeva-SP

    March 2022 — September 2022

    Technical support for users and preparation and maintenance of IT equipment.

    • Development of two institutional websites in React.js.
    • Work focused on digital presence and presenting the company's services.
Selected projects

Solutions developed in real-world contexts.

A selection of work demonstrated through professional experience, including internal systems, enterprise applications, and digital presence.

01

Internal systems and REST APIs

Context
Internal Solpi solutions focused on process automation, reduced rework, and operational productivity.
My contribution
Development across the complete lifecycle, including requirements analysis, architecture, implementation, testing, maintenance, and evolution.

Technologies

  • Flutter
  • Dart
  • Shelf
  • Next.js
  • Node.js
  • Git

Professional experience

02

Internal enterprise systems

Context
Development, maintenance, and support of Emulzint Zeelandia's internal systems.
My contribution
Functional analysis, requirements gathering, technical and functional specifications, fixes, improvements, testing, and deployment support.

Technologies

  • Oracle Forms
  • Oracle Reports
  • PL/SQL

Professional experience

03

BM Bike institutional websites

Context
Two institutional websites created to support the company's digital presence and present its services.
My contribution
Development of both websites while working in IT.

Technologies

  • React.js

Professional experience

Skills

Professional experience and technical skills.

Technologies and knowledge that make up my work in systems development, support, and infrastructure.

Professional experience

Web and mobile

Backend and APIs

Databases and enterprise systems

Development lifecycle

Cloud and infrastructure

Technical support

Education and languages

Academic foundation and continuous learning.

Completed higher and technical education, languages, and complementary studies organized by area.

Academic education

Bachelor's degree in Computer Science

Universidade Anchieta · Jundiaí-SP

2021 — 2024

IT Technician

ETEC Vasco Antônio Venchiarutti · Jundiaí-SP

2018 — 2020

Languages

Portuguese
Fluent
English
Intermediate
Spanish
Basic
Freelance work

Software projects and services.

In addition to my professional work, I am available for freelance projects with a clear scope in web and mobile development and systems integration.

Websites and landing pages

Development of responsive pages for the professional presentation of companies, brands, products, and services, with attention to performance and cross-device compatibility.

Related technologies

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

Applications and APIs

Implementation of web or mobile applications and REST APIs, from understanding requirements through testing, maintenance, and evolution.

Related technologies

  • Flutter
  • Dart
  • Next.js
  • Node.js
  • APIs REST

Maintenance and integrations

Fixes, improvements, and integrations in existing solutions, including backend routines and databases.

Related technologies

  • Node.js
  • SQL
  • PL/SQL
  • Oracle
How I work

From the problem to the evolution of the solution.

An objective sequence based on the stages that are part of my work in systems development.

  1. 01

    Problem and requirements

    Understanding the context, analyzing needs, and gathering the solution requirements.

  2. 02

    Technical definition

    Organizing the scope and defining the application's architecture, technologies, and responsibilities.

  3. 03

    Implementation and testing

    Development, integration, and testing of the solution according to the defined requirements.

  4. 04

    Maintenance and evolution

    Fixes, support, and improvements to address new system needs.

Contact

Open to professional opportunities and software projects.

Get in touch to discuss positions and professional opportunities, collaborations, or freelance projects.

Direct message

Let's talk?

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E-mailthiagokoiama@gmail.com
LinkedInlinkedin.com/in/thiagokoiama

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