Open to opportunities

Rafael Ferreira

@rafaelferreira

Message

I am a senior .NET engineer delivering scalable, high-performance systems.

Brazil

Message

What I'm looking for

I seek senior .NET roles where I can design scalable architectures, lead small teams, improve system performance, and implement SOLID/DDD practices to deliver measurable business impact.

I am a senior .NET software engineer with over eight years of experience specializing in .NET development and software architecture. I focus on building scalable, high-performance enterprise applications and solving complex challenges while continuously improving my craft.

At Grupo Fast I led continuous enhancement and development of a management system for a rapidly expanding clinic network, modernized legacy architecture, integrated multiple third-party services, and optimized database interactions to support business growth. I also reworked the institutional website using modern .NET technologies to improve SEO, performance, and multilingual support.

I designed system architectures using DDD and Clean Architecture for franchise management platforms, implemented secure APIs and real-time synchronization across locations, and developed inventory and scheduling systems that reduced operational friction and customer complaints. I have managed small freelance teams, delegated tasks, reviewed code, and enforced best practices to ensure delivery quality.

I follow SOLID and clean-code principles, apply CI/CD and containerization for reliable delivery, and work across frontend, backend, and database technologies. I hold a bachelor's degree in Computer Engineering and remain committed to continuous learning and delivering measurable business impact.

Experience

Work history, roles, and key accomplishments

Current

Senior .NET Software Engineer

Current

Grupo Fast

Apr 2021 - Present (4 years 5 months)

Composed and led a continuous enhancement team for a laser hair removal clinic management system, modernizing legacy architecture, integrating third-party services, and significantly improving operational efficiency and scheduling performance.

C#).NET Core .NET Framework Entity Framework REST APIs DDD SQL Server

Mid Level .NET Developer

Grupo Fast

Feb 2020 - Apr 2021 (1 year 2 months)

Led development of a management system for a cosmetic clinic franchise, simplifying appointment scheduling, inventory management, and implementing secure real-time APIs to centralize franchisor data.

.NET Core ASP.NET MVC SignalR Web APIs SQL Server JavaScript Team Leadership

Mid Level .NET Developer

Grupo Fast

Feb 2019 - Feb 2020 (1 year)

Designed and delivered a management system for a health plan franchise, automating clinical operations, medical record management, and a real-time interactive medical agenda to enhance scheduling efficiency.

C#).NET Core PostgreSQL MySQL Stored Procedures Docker CI CD Azure DevOps

Junior .NET Developer

Instituto da Construção

Nov 2016 - Jan 2019 (2 years 2 months)

Improved a construction training management system by optimizing database queries and reports, implementing group scheduling and payment gateway integrations to increase sales and operational throughput.

C#)ASP.NET MVC SQL Server TDD Selenium NUnit xUnit

Education

Degrees, certifications, and relevant coursework

UNORTE – Centro Universitário do Norte Paulista

Bachelor of Computer Engineering, Computer Engineering

2014 - 2019

Activities and societies: Scientific initiation: Galvanometer usage in laser harp electronics; Thesis: Comparative study of A* pathtracing algorithm vs. machine learning genetic algorithm on warehouse robots automation.

Bachelor's degree in Computer Engineering with a scientific initiation on galvanometer usage in laser harp electronics. Thesis compared A* pathtracing algorithm and a machine learning genetic algorithm for warehouse robots automation.