Senior DevOps / SRE – CI/CD
Engineer
I specialise in
I’m Mario Dantas – an engineer who designs both the circuit and the code. Over 25 years of hands‑on experience: from building an ethanol fuel measurement device (mechanics, electronics, firmware) to crafting C++ applications and pixel‑perfect UI for flight simulators. I bring rare hardware + software expertise to every freelance project or technical team.
What I deliver for clients
Clear, outcome‑focused services – from prototype to production
Embedded & IoT Prototyping
Custom electronics design, Arduino/ESP32 firmware, sensor integration, and complete functional prototypes ready for testing.
C++ Desktop & Simulation UI
High‑performance C++ applications, flight simulator instrument panels, OpenGL/ImGui interfaces, and real‑time data visualisation.
DevOps & Full‑Stack Development
CI/CD pipelines (GitLab/Jenkins), monitoring stacks (Dynatrace/ELK/Grafana), PHP/Python backends, and database administration.
Featured projects
From concept to working system – real engineering stories
Ethanol fuel measurement device
Challenge: Build a precision fuel analyser from scratch.
Solution: Designed mechanics, custom PCB, Arduino C++ firmware, and a data logging interface.
Result: A fully functional prototype with ±0.5% accuracy – demonstrating full hardware/software ownership.
C++ Flight Simulator UI & Instruments
Challenge: Realistic, low‑latency cockpit displays.
Solution: C++ with OpenGL, custom GDI+ instruments, and simulator data bus integration.
Result: Smooth 60 FPS instruments used by a small flight simulation community.
FYT Factory – Custom Firmware for Car Head Units
Challenge: Optimize Chinese Android head units with bloated firmware and poor performance.
Solution: Developed MD-EDITION custom kernel with GPU rendering, memory optimizations, and FMC management app for backup/restore.
Result: Trusted by thousands of users globally; featured on XDA Forums with multi-language support.
“Mario’s ability to jump from electronics to high‑level C++ is rare. He delivered a working prototype ahead of schedule.”
— J. Costa, Hardware Startup Founder (past client)
Looking for a hands‑on engineer?
Available for freelance contracts, prototype development, or technical consulting.
Let’s talk about your project →