Available for new challenges

Midlevel Full Stack Engineer

Thyago
C. Martins
Backend · Cloud

Computer Engineer with 4+ years building scalable systems for national and international companies. Passionate about simplifying complexity and turning technology into real business solutions.

View projectsGitHub →
4+
Years XP
70M+
Users impacted
10
Companies
3
Countries
iam/identity.service.ts — Capgemini
01// IAM — 20M+ users · Banco Bradesco
02
03@Injectable()
04export class IdentityService {
05  async authenticate(dto: AuthDto): Promise<Token> {
06    const user = await this.ldapService.verify(dto)
07    if (!user.active) throw new UnauthorizedException()
08    return this.jwtService.sign({ sub: user.id })
09  }
10}
✅
Pipeline passed
production · just now
Thyago C. Martins
Thyago C. Martins
São Paulo, Brasil · UTC-3
🇧🇷 Portuguese — Native🇺🇸 English — Professional🇪🇸 Spanish — Basic
About me

Engineer who
simplifies complexity.

Computer Engineer graduated from ESAMC, working as a Fullstack Developer for over 4 years with national and international teams. My mission is to turn technology into solutions that truly serve the business.

Experience on platforms with 20M+ users (Banco Bradesco / Capgemini), telecoms (Vivo / Telefônica), web games, home automation, and payment systems for clients in the US, Spain, and Mexico.

Currently deepening knowledge in Software Architecture and Scalable Applications, aiming to work as a Solutions Architect.

🏛️
Solid architecture
DDD, Hexagonal, Microservices.
📈
High scale
Systems for 20M+ users.
🌎
Global mindset
Projects in Brazil, US, Spain & Mexico.
🔐
Security & IAM
Auth, LDAP, API Security.
🤖
AI & LLM
ML, Fine-tuning, RAG & LLM integrations in production.
Career

Work
Experience

Back End Developer — Java · IAM
Capgemini → Banco Bradesco📍 Remote📅 Dec 2025 — Present

Deployed via Capgemini at Banco Bradesco as a Backend Developer on the Identity team, responsible for developing IAM solutions. I build secure APIs for authentication and authorization in an environment that serves 20M+ active users with high availability.

JavaSpring BootLDAPJWTAPI SecurityPostgreSQLMicroservices
Developed and maintained secure APIs for authentication and authorization flows.
Implemented auth rules aligned with bank security policies and compliance standards.
Systems with 20M+ active users requiring high performance and resilience at scale.
Contributed to strategic security and identity integration projects.
Full Stack Developer — React · Java · Node
Mutant → Vivo (Telefônica Brasil)📍 São Paulo, SP📅 Aug 2024 — Dec 2025

Deployed via Mutant at Vivo/Telefônica as a Fullstack Developer. Worked with React, Java, and Node in microservices systems, developing new API features and maintaining pages. Projects directly impact end users in home automation, invoice access, and phone number support flows.

ReactNode.jsJavaTypeScriptBFFMicroservicesUnit Tests
Built features for APIs and frontend in Vivo's home automation projects.
Worked across frontend, BFF, and microservices — complete end-to-end stack.
Monthly flow of 10,000+ users on the platform with constant demand for fast solutions.
Implemented efficient unit tests ensuring the highest possible code quality.
Software Developer — NestJS · React · Laravel
🌎 Gaming Innovators📍 Remote · US / Spain / Mexico📅 Jan 2024 — Jul 2024

Developed and maintained microservices with NestJS, PHP, and Laravel, plus frontend applications with React. Built mobile apps with React Native for international clients in the US, Spain, and Mexico.

NestJSReactReact NativePHPLaravelMicroservices
Payment systems serving ~5,000 monthly users with secure and efficient processing.
Cross-platform mobile apps (React Native) for US, Spain and Mexico markets.
API integrations in mixed architectures — microservices and monolith.
Software Engineer — Java · PHP · JavaScript
Codernex📍 São Paulo, SP📅 Feb 2023 — May 2024

Backend Developer on online gaming projects (bingo, web games), management systems, and WordPress plugin maintenance for national and international markets. Impacted 15,000+ monthly clients.

JavaPHPLaravelJavaScriptWordPressMySQL
Projects impacting 15,000+ monthly clients with significant financial returns.
Developed online gaming systems — bingo and web games — for national and international audiences.
Maintained and developed WordPress plugins for multiple markets.
Freelance Full Stack Developer
💻 99Freelas📍 São Paulo, SP (Remote)📅 Jul 2022 — Feb 2023

Freelance web development covering websites, landing pages, e-commerce, REST APIs, microservices, and Telegram bots. Worked with PHP/Laravel, Java/Spring, Node/React, and Python using Kafka, Docker, and AWS.

PHP/LaravelJava/SpringNode.jsReactPythonKafkaDockerAWS
Built Python bot infrastructure that generated 920 new users for a client.
Developed e-commerce platforms, management systems, REST APIs, and microservices.
Gained full-cycle perspective: frontend, backend, and infrastructure.
Java Developer — Volunteer
🤝 DevsFree — ICPA Project📍 São Paulo, SP📅 Apr 2022 — Dec 2022

Volunteer on the ICPA development team. Responsible for structuring design patterns, refactoring existing code, and contributing to backend development in Java/Spring Boot. Produced technical documentation and UML diagrams.

Java 11/17Spring BootSpring SecurityPostgreSQLSwaggerScrumUML
Restructured the entire code architecture and design patterns of the project.
Produced technical documentation and UML diagrams, leveling the whole team.
Developed technical leadership and problem-solving skills in challenging contexts.
Cases

Featured
Projects

Fintech · IAM · High Scale

Identity & Access Management — Banco Bradesco

IAM platform for Brazil's largest private bank. Secure authentication APIs with LDAP, JWT, and granular access control for 20M+ active users with zero downtime requirements.

JavaSpring BootLDAPJWTPostgreSQLKubernetes
70M+
users
99.99%
uptime
High
security

🏢 Enterprise System — Confidential
Telecom · Brazil · B2C / Self-service

Vivo Platform — Home Automation & Billing

Vivo/Telefônica Brasil digital customer service platform. Fullstack development — React frontend, Node.js/TypeScript BFF, and Java microservices — for home automation (IoT), billing management, and connection diagnostics.

ReactNode.jsJavaTypeScriptBFFMicroservices
20M+
users
99.99%
uptime
High
security

🏢 Enterprise System — Confidential
Gaming · International · US / Spain / Mexico

Payment System — Gaming Innovators

Backend and mobile for international gaming platform. NestJS + Laravel APIs integrated with payment systems processing ~5,000 monthly transactions. React Native for iOS and Android.

NestJSLaravelReact NativeMySQL
🏢 Enterprise System — Confidential
PERSONAL PROJECT · OPEN SOURCE
Fintech · AI · Full Stack · SaaS

FinanceAI — Personal Finance Management with AI

Fullstack personal finance platform for tracking income, expenses, investments and goals. Interactive dashboard with exportable reports, financial simulator, allocation models (50/30/20, CFP/ANBIMA), market data integration via brapi.dev, and AI-assisted recommendations. Next.js as frontend and BFF, authentication, due date notifications, and multilingual support (PT/EN/ES).

Next.jsReactTypeScriptNode.jsPostgreSQLDockerbrapi.devAI
Full Stack
Architecture
PT/EN/ES
Multilingual
AI
Recommendations
View GitHub
PERSONAL PROJECT · OPEN SOURCE
Construction · B2B · SPA

Viobra (Construcom) — Technical Construction Management

B2B web platform for civil construction management in Brazil. React/TypeScript SPA unifying multi-project dashboard, budgeting with calculation memory and DER-ES table, Gantt schedule, field diary, physical measurement, warehouse inventory and approval workflows — with i18n (pt/en/es) and Docker/Nginx deployment.

ReactTypeScriptViteReact RouterTailwind CSSi18nextDockerNginx
B2B
Platform
PT/EN/ES
Multilingual
SPA
Architecture
Fintech · Brazil

GEVTECH — Credentialing & Payments

Web front-end for a multi-tenant CRM for credentialing and payments. Next.js + TypeScript with BFF in Route Handlers integrating REST API and legacy PHP systems. Transactional dashboard, white labels, establishments, fees, compliance, and terminals.

Next.jsReactTypeScriptNode.jsTailwind CSSSocket.IODocker

🏢 Enterprise System — Confidential
Page 1 of 2
Technologies

Stack &
Skills

☕

Java Back-end

Main corporate stack. Spring Framework in production for high-scale and security-critical systems.

Java 11/17
Spring Boot / Security
Spring Cloud / JPA
LDAP / IAM
🟢

Node.js Back-end

Current stack with Node.js, TypeScript, and NestJS. Robust REST APIs and microservices in production.

Node.js / TypeScript
NestJS
Express.js
REST / GraphQL APIs
⚛️

Front-end

React and Next.js for responsive, performant interfaces. React Native for cross-platform mobile apps.

React / Next.js
React Native
Angular
Vue.js 3
🐘

Databases

SQL and NoSQL. Modeling, query optimization and caching strategies with Redis.

PostgreSQL / MySQL
MongoDB
Redis
TypeORM / Hibernate
📡

Messaging & Cloud

Event-driven systems with Kafka and RabbitMQ. AWS cloud with Docker and Kubernetes.

Apache Kafka
RabbitMQ
AWS
Docker / Kubernetes
🏛️

Architecture

DDD, Hexagonal Architecture, and Microservices. Focus on design patterns and scalability.

DDD
Hexagonal Arch.
Microservices
Distributed Systems
🤖

AI / ML & LLM

Applied AI in production: LLM integrations, RAG pipelines, model fine-tuning, and ML-powered features.

LLM / OpenAI API
RAG
Fine-tuning
Machine Learning
Education

Academic
Background

2019–2024
B.Eng. in Computer Engineering
ESAMC — São Paulo
Software Engineering, Distributed Systems, Software Architecture, and advanced computer science fundamentals.
2016–2018
Technical Degree — Electrical Technician
ETEC — São Paulo
Electronics, automation, and electrical systems. Solid technical foundation for the technology field.
2018–2020
English — Professional Working
Evolutime
Professional English focused on technical communication for international corporate environments.
Certifications

 

🎓
Software Architecture & Modern Systems Design
Udemy
Aug 2025
🎓
Learn Golang from Scratch! Build a COMPLETE APPLICATION!
Udemy
Jun 2025
🚀
Scalable Microservices Challenge
Rocketseat
Jun 2025
🎓
React from Zero to Mastery (w/ hooks, router, API, Projects)
Udemy
Feb 2025
🎓
Advanced Node.js with Clean Architecture, NestJS and TypeScript
Udemy
Feb 2025
🎓
NestJS for REST API with TypeORM, JWT Authentication and Tests
Udemy
Feb 2025
🎓
Automated Testing in Practice with Spring Boot
Udemy
Aug 2024
🎓
Azure Pipelines — CI/CD, Docker and Kubernetes on Azure DevOps
Udemy
Aug 2024
🎓
Java Microservices with Spring Boot and Spring Cloud
Udemy
Aug 2024
🎓
Microservices Architecture: Orchestrated Saga Pattern
Udemy
Jun 2024
🎓
Advanced Web Development with PHP, Laravel and Vue.js
Udemy
Jun 2024
🎓
Complete PHP 7 — Web Developer Course
Udemy
Jun 2024
🎓
Java from Scratch
Udemy
Jun 2024
🎓
Linux Bootcamp: Learning Track [Devs & DevOps]
Udemy
May 2024
💜
Unit Testing with JUnit
DIO (Digital Innovation One)
May 2023
💜
Learn S.O.L.I.D. Principles with Java
DIO (Digital Innovation One)
Apr 2023
🎓
Mastering Zabbix from Basic to Advanced
Udemy
Mar 2023
🔷
DevOps Essentials
IBM
Mar 2023
📘
The Bits and Bytes of Computer Networking
Coursera (Grow with Google)
May 2022
🎓
Network Architecture
Udemy
Apr 2022
🌐
CCNA: Introduction to Networks
Cisco Networking Academy
Dec 2021
🔌
Optical Fiber Technician TFO - FS100A
Lancore
Jun 2021
🎓
Software Architecture & Modern Systems Design
Udemy
Aug 2025
🎓
Learn Golang from Scratch! Build a COMPLETE APPLICATION!
Udemy
Jun 2025
🚀
Scalable Microservices Challenge
Rocketseat
Jun 2025
🎓
React from Zero to Mastery (w/ hooks, router, API, Projects)
Udemy
Feb 2025
🎓
Advanced Node.js with Clean Architecture, NestJS and TypeScript
Udemy
Feb 2025
🎓
NestJS for REST API with TypeORM, JWT Authentication and Tests
Udemy
Feb 2025
🎓
Automated Testing in Practice with Spring Boot
Udemy
Aug 2024
🎓
Azure Pipelines — CI/CD, Docker and Kubernetes on Azure DevOps
Udemy
Aug 2024
🎓
Java Microservices with Spring Boot and Spring Cloud
Udemy
Aug 2024
🎓
Microservices Architecture: Orchestrated Saga Pattern
Udemy
Jun 2024
🎓
Advanced Web Development with PHP, Laravel and Vue.js
Udemy
Jun 2024
🎓
Complete PHP 7 — Web Developer Course
Udemy
Jun 2024
🎓
Java from Scratch
Udemy
Jun 2024
🎓
Linux Bootcamp: Learning Track [Devs & DevOps]
Udemy
May 2024
💜
Unit Testing with JUnit
DIO (Digital Innovation One)
May 2023
💜
Learn S.O.L.I.D. Principles with Java
DIO (Digital Innovation One)
Apr 2023
🎓
Mastering Zabbix from Basic to Advanced
Udemy
Mar 2023
🔷
DevOps Essentials
IBM
Mar 2023
📘
The Bits and Bytes of Computer Networking
Coursera (Grow with Google)
May 2022
🎓
Network Architecture
Udemy
Apr 2022
🌐
CCNA: Introduction to Networks
Cisco Networking Academy
Dec 2021
🔌
Optical Fiber Technician TFO - FS100A
Lancore
Jun 2021
GitHub Foundations
GitHub
AZ-900 — Azure Fundamentals
AZ-900 — Azure Fundamentals
Microsoft
AWS Cloud Fundamentals
Amazon Web Services
Contact

Let's build
something together?

Open to Backend/Fullstack Developer opportunities and challenging projects. Response within 24h.

oficialthyago2@gmail.com →
📧

E-mail

oficialthyago2@gmail.com

💼

LinkedIn

in/thyagomartins

🐙

GitHub

thyagomartins0

📄

Resume

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