About
About Me
Software Engineer focused on Security and Identity. Building resilient and scalable systems with Elixir/OTP, Ruby, and Go. Working at the intersection of high-performance engineering and Security & Identity, advocating for best practices and open-source technologies.
Skills
Programming Languages
Frameworks
Security & Identity
Infrastructure & Messaging
Databases
Experience
Swap Financial
July 2026 - Present
Software Engineer II: Developing and evolving backend services with Elixir/OTP, Phoenix, and Kotlin on a B2B Banking as a Service platform. Building APIs and integrations between financial systems with a focus on performance, reliability, and regulatory compliance.
Plathanus Software & Design
December 2025 - June 2026
Mid-Level/Senior Software Engineer: Designed and implemented full Recurring Automatic PIX integration with Itaú's Open Finance API (mTLS/OAuth 2.0). Built NFSe issuance middleware via National Sefin API with async processing via Sidekiq. Modernized legacy Rails 2.x codebase.
Effecti
January 2025 - December 2025
Full Stack Mid-Level Developer: Developed microservices in Ruby on Rails and Java for public tender scraping, processing >1.5M records/day. Led migration of 4 critical services from Java monolith to Golang + Serverless (Lambda + SQS + API Gateway), cutting p95 latency by 78%.
Accenture
February 2019 - March 2022
Mid-Level Backend Developer (March 2020 - March 2022): Developed microservices with Spring Boot, integrations with third-party and legacy Ruby on Rails systems. Code review and mentoring of junior developers.
Junior Backend Developer (February 2019 - March 2020): Development of features in enterprise systems, bug fixing and maintenance of Java applications.
Pirelli Pneus
October 2017 - October 2018
Junior Developer: Development of internal systems for production control, creation of reports and dashboards using Ruby on Rails, PHP, and SQL Server.
Gotemburgo - Volvo Trucks
February 2015 - August 2016
Intern: Development of solutions for stock recording and organisation. Automation of tasks in Microsoft Excel and other Office tools. Contributed to achieving gold/platinum classification in the 100% VOLVO process.
Certifications
AWS Certified Cloud Practitioner
2024
Oracle Certified Professional, Java SE 17 Developer
2022
Cisco CCNA 200-301
2020
CompTIA Security+
2021
Education
Systems Analysis and Development
UNIFAN - Faculdade Nobre • 2024 - 2027
Civil Engineering
UNIFTC • 2015 - 2022
Information Systems Technician
SENAI • 2019
Projects
bullet-cloud-api
RESTful API in Go for inventory management.
rinha-backend-bullet
Project for Backend Duel (Rinha de Backend 2024 Q1).
GitPentest
Ethical hacking tools for GitHub pentesting.
Arremate-certo
Automation for bidding and procurement processes.
About BulletOnRails
BulletOnRails is a personal blog where I share insights on software engineering, distributed systems, security, and open-source.