RBJ Engineering Services, LLC • Texas, USA
Computer Engineer Building Custom Software & Automation Solutions
I help businesses bridge software and hardware — delivering scalable systems, PLC automation, API integrations, and engineered solutions that work in the real world.
What I Do
Four engineering disciplines. One engineer who owns the full stack — from control logic on the plant floor to production APIs in the cloud.
Custom Software Development
Full-stack applications, automation tooling, and internal platforms. Built with clean architecture, tested, and shipped through CI/CD.
API & Backend Systems
REST and event-driven APIs, data pipelines, and integrations between services that never meant to talk to each other. Observability included.
PLC & Industrial Automation
Ladder logic, structured text, HMI/SCADA integration, and process optimization. I write control code the way good software engineers write software — reviewed, versioned, and testable.
System Integration
Hardware meets software. Embedded systems, sensors, protocols, and the glue that turns a pile of parts into a working, monitorable system.
A hybrid engineer, not a generalist.
I’m Rodolfo Baez Jr., a Computer Engineer (B.S.) and consultant based in Texas. For over a decade I’ve worked across both sides of the stack — writing production software, architecting APIs, and building PLC and embedded systems that run real equipment.
That combination is rare. It means your automation project doesn’t get handed between a controls team and a software team with a spec in the middle. You work with one engineer who owns the whole loop.
Core stack
- Python, JavaScript/TypeScript, C/C++
- Docker, GitHub Actions, CI/CD pipelines
- PLC (ladder/structured text), HMI/SCADA
- REST APIs, webhooks, event pipelines
- Embedded: Arduino, microcontrollers, sensors
Featured Projects
A sample of recent work — more in the portfolio.
Have a project in mind?
Whether it’s a production line that needs automating, an API that needs building, or hardware and software that refuse to talk to each other — I can help.