I like dealing with hardware, firmware and software. From valve amp schematics and DSP algorithms to aquarium temperature and irrigation controllers, here's some of what I like to tinker with.

I'm a founder/partner at Raks Tecnologia Agrícola, where we build IoT for agriculture: soil moisture sensors and satellite/LTE communication modules for field equipment. I also do independent electronics and IoT consulting. Based in Brazil 🇧🇷

Hardware & embedded

• High-frequency and impedance-controlled PCB design
• Design and development of sensor and communication boards (IoT sensors, satellite, LTE / NB-IoT)
• Multi-channel data acquisition architectures: analog front-ends, solar/battery power, LTE store-and-forward
• Analog audio: valve amp schematics, plus DSP algorithms for audio effects

RF & antennas

• RF front-end layout and antenna integration for cellular (LTE / NB-IoT) and satellite modules
• Antenna matching networks and RF trace design (controlled-impedance feedlines, grounding, keep-outs)

Firmware & connectivity

• Firmware for STM32, ESP32 and embedded Linux targets
• Cellular IoT: AT-command modem integration, NB-IoT, eSIM (GSMA SGP.32 / IPAd) for IoT devices

Software & cloud

• Web platforms deployed on AWS: Terraform, Route 53, CloudFront, S3, EC2, RDS, Timestream
• Python tooling and TypeScript web apps, with Supabase/Postgres backends
• Integration with third-party device APIs (rate limiting, request queuing, homologation)
• Dashboards and reports for deployed device health

Business & product

• Product development from prototype to production, including outsourced electronics manufacturing management

Interested in agtech, web dev, IoT, cellular connectivity or audio electronics? Reach out on LinkedIn.