OpenSensor Engineering LLC is an engineering practice based in Cumberland, Maine, working across software, cloud platforms, fintech, hardware, and security research. The company brings experience in systems used by payroll, e-commerce, and financial services, offering backend architecture, modernization, cloud infrastructure, and full-stack delivery. Its technology work includes Python, Django, Java, AWS, Terraform, and Kubernetes.

OpenSensor also develops and supports products and open-source projects. GrowMax boards and kits provide indoor growers with per-plant moisture monitoring and scheduled watering, using open MicroPython firmware without cloud lock-in or subscription fees. Solar Monitoring Alerts tracks inverter health and production, providing daily summaries and real-time email or SMS notifications without requiring new rooftop hardware. The company also sells electronics and offers 3D printing.

Its open-source and research work includes LightNVR, a network video recorder for RTSP and ONVIF cameras, pipenv maintenance contributions, and the MARS neural-network runtime. Security research focuses on embedded firmware and secure boot, including coordinated vulnerability disclosures. OpenSensor presents these activities as distinct channels spanning engineering, products, open source, and security.