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João Victor CasteloJC
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João Victor Castelo

@joovictorcastelo

Senior Software Engineer at Ubiminds, modernizing enterprise LMS features and using AI-assisted workflows for investigation, implementation, and validation.

Brazil
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At Ubiminds, I develop enterprise LMS features for NEOGOV in .NET, C#, SQL Server, and Angular, including manager approval flows controlled by backend feature flags. I use Claude Code CLI and reusable agent skills to investigate, trace code, analyze root causes, test, and validate fixes.

At Sunshift.Dev, I designed Codex Skills and SQL and Atlassian MCP integrations for an Alberta Motor Association travel website CMS project. The reusable investigation and root-cause-analysis skills improved productivity by approximately 40% on that project.

At Instituto Atlântico, I led a six-person team supporting Dell Technologies sales applications used across six Latin American countries. I applied Clean Architecture, DDD, and CQRS, and optimized stored procedures by up to 90% in specific cases.

Earlier, I modernized applications at Marlabs and GREaT, including resolving API and database bottlenecks and moving a billing monolith toward microservices. I also taught object-oriented programming, software requirements, detailed design, and verification and validation at Federal University of Ceará.

Experience

Work history, roles, and key accomplishments

SU

Software Engineer / AI-Driven Software Engineer

Sunshift.Dev

Jul 2025 - Feb 2026 (7 months)

Designed Codex Skills for specification, planning, implementation, debugging, testing, and code review, integrating SQL and Atlassian MCP. Developed reusable investigation and root-cause-analysis skills, improving productivity by approximately 40%.

IA

Technical Lead / Software Engineer

Instituto Atlântico

Aug 2021 - Oct 2024 (3 years 2 months)

Led a six-person team supporting enterprise sales applications for approximately 1,000 users across six Latin American countries. Applied Clean Architecture, DDD, CQRS, MediatR, and RabbitMQ, and optimized stored procedures by up to 90%.

IA

Software Engineer

Instituto Atlântico

Mar 2020 - Aug 2021 (1 year 5 months)

Built .NET/Angular microservices and SOAP/REST integrations for sales applications, helping accelerate Brazilian sales workflows by up to 50%. Implemented event-driven services with RabbitMQ and automated tests with SpecFlow.

Education

Degrees, certifications, and relevant coursework

UN

Unichristus

Postgraduate Degree, Information Security

2020 - 2021

Postgraduate degree in Information Security from Unichristus, completed in 2021.

FC

Federal Institute of Ceará

Master of Science, Renewable Energy

2017 - 2019

Master of Science in Renewable Energy from the Federal Institute of Ceará, completed in 2019.

FC

Federal Institute of Ceará

Bachelor of Science, Computer Engineering

2011 - 2017

Bachelor of Science in Computer Engineering from the Federal Institute of Ceará, completed in 2017.

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