Alex Paiva
São Paulo, SP
Summary
I'm Alex, a .NET Software Engineer with over five years of experience developing and maintaining scalable applications using .NET (C#). I also have hands-on experience with multiple Azure services such as App Services, Key Vault, and Service Bus and am always eager to expand my cloud expertise.
At Motorola Solutions, I contributed to a secure authentication system, integrating Azure and TOTP authentication to meet strict security standards. I enjoy solving complex problems, improving software quality and working in fast-paced, collaborative environments. With strong adaptability and a quick learning mindset, I’m always excited to take on new challenges and expand my technical skill set.
Overview
7
7
years of professional experience
1
1
Certification
Work History
Software Engineer
Motorola Solutions
10.2022 - Current
- Designed and developed a unified login system using Angular, .NET Core, and REST APIs, implementing TOTP authentication to meet new security standards for U.S. public agencies. Developed interactive front-end components, improving the UI/UX for authentication flows. Also created a front-end prototype for a new interface for the whole system, which later evolved into a dedicated project.
- Diagnosed and resolved critical bugs in a complex legacy system with 30+ years of history, improving stability and maintainability.
- Worked with a variety of technologies in a single public safety software environment, including C# (.NET Framework, .NET Core and ASP.NET), Java, Angular, and C++, using multiple IDEs and automation tools, demonstrating strong adaptability to different tech stacks.
- Took ownership of software quality by writing and maintaining unit tests (xUnit) and integration tests, ensuring reliability and maintainability. In addition, collaborated with the QA team during regression testing, helping identify and resolve issues before deployment.
.NET Software Engineer
act digital
09.2021 - 06.2022
- Developed & deployed a chatbot system on Microsoft Azure, using Service Bus (RabbitMQ), Storage, Key Vault, and Kubernetes for high availability and security.
- Built & secured REST APIs, integrating with third-party platforms (WhatsApp, Zendesk, IBM Watson Assistant).
- Automated testing & security—Wrote unit tests, integration tests, and API security tests to improve system resilience.
.NET Software Engineer
Blip
01.2020 - 09.2021
- Developed and maintained chatbot solutions using C# (.NET Core), REST APIs and microservices.
- Worked closely with customer teams to integrate chatbots with third-party services through API development and front-end customization, including Angular and front-end JavaScript frameworks.
- Assisted in onboarding new customers by providing technical consulting on full-stack development and best practices.
- Designed and implemented a REST-to-SOAP adapter API for a client-facing utility company app, enabling smooth legacy system integration.
Junior Software Engineer
Embraer
09.2018 - 12.2019
- Developed and maintained support systems for critical Embraer applications, working primarily with .NET Framework (C#) and a SQL Server. Designed backend services and data management tools, optimizing system performance and ensuring seamless integration with internal applications.
- Researched software engineering best practices for critical systems, forming the foundation for my undergraduate thesis
Software Engineering Intern
Mereo.
02.2018 - 08.2018
- Solely responsible for developing new features, maintaining, and optimizing the company’s internal ERP system using AngularJS, JQuery, .NET Framework, and Entity Framework.
- Fixed critical bugs and improved system stability, ensuring smoother operations for internal users.
- Provided direct support to the team by troubleshooting system issues and implementing performance optimizations.
Education
Bachelor of Science - Information Systems
Universidade Federal De Minas Gerais
Belo Horizonte, Minas Gerais, Brazil12-2019
Sandwich Degree - Computer Science
Webster University
St. Louis, Missouri, United States01.2015
Skills
- NET Core / C#
- Java
- REST APIs
- Microsoft Azure
- Automation Testing
- Java
- Git
- Scrum
Certification
Microsoft Certified: Azure Fundamentals, Microsoft
Languages
English
Advanced (C1)
Portuguese
Bilingual or Proficient (C2)
Timeline
Software Engineer
Motorola Solutions
10.2022 - Current
.NET Software Engineer
act digital
09.2021 - 06.2022
.NET Software Engineer
Blip
01.2020 - 09.2021
Junior Software Engineer
Embraer
09.2018 - 12.2019
Software Engineering Intern
Mereo.
02.2018 - 08.2018
Bachelor of Science - Information Systems
Universidade Federal De Minas Gerais
Sandwich Degree - Computer Science
Webster University
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