Lead Device Software Engineer, Embedded & Firmware
ConnectDER
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ConnectDER (www.ConnectDER.com) represents the next generation in US-based resource technology product development. Our signature product, the ConnectDER Meter Socket Adapter, dramatically cuts down the cost and interconnection time for solar energy, EV charging, and home battery storage, putting clean, resilient power within reach of millions of homeowners. With a pipeline of exciting innovations, we’re only just getting started on our journey to transform how the world makes and consumes its energy. We are a dynamic, venture-backed company based in Philadelphia, PA, near Center City, with a team of over 50 dedicated professionals working in remote, hybrid, and on-site roles across the United States. As we continue to grow, we are committed to developing cutting-edge products that empower technology partners, installers, electricians, and their customers. We seek talented individuals who can deliver high-quality service and drive the value of clean energy resources forward. Our culture is collaborative, transparent, and team-oriented. We value open communication and people who bring thoughtful perspectives to the table. If you're looking for an opportunity to stretch your skills, get creative, and be a part of something new and meaningful, ConnectDER is the place for you! All full-time employees receive access to comprehensive benefits including: Health insurance plan - we cover 75% for employees, spouses, and children. Flexible paid time off – take the time off that you need. 401K with company match – we want to help you meet your future financial goals. Equity stock options - your opportunity to share in the success of the company. This is a hands-on technical lead role as part of a team of 3 firmware engineers, reporting to the Director of Electrical Engineering. In this role, you will own the device software system end to end, defining the architecture, breaking it into well-scoped workstreams, and driving fast, iterative delivery. You will both write production code, and delegate tasks to the team. You will be responsible for the IslandDER digital interface, built to comply with a new device-to-device communication standard we are co-developing with the leading battery and inverter companies for secure integration with home batteries (e.g., Tesla Powerwall) and Vehicle-to-Home (V2H) solutions. The software monitors voltage and current, drives relays, performs safety checks, and communicates securely with third-party devices and the ConnectDER cloud. The device software breaks into four subsystems you'll own: Data Acquisition (grid/microgrid metering), Control (real-time, safety-critical), Communication (Ethernet, WireGuard, multi-core interfaces), and Integration (fault tolerance, firmware updates, security, logging). In your first year, you might: Write the design diagrams and safety case for the IslandDER's safety-critical software, and sit across the table from the NRTL to defend it. Bring up firmware on a new board with the EE team, debugging across the hardware/software boundary with a logic analyzer. Stand up the code-signing pipeline so a production firmware build can be signed and shipped as a verified OTA update. Hand a teammate a well-scoped metering or comms workstream with a clean interface, then review their PRs. Tighten a line-frequency control loop that's missing its timing budget. Responsibilities will include: Systems Architecture & Leadership: Own the overall device software architecture. Break complex requirements into well-scoped workstreams, delegate with clean interfaces, and guide the team while staying hands-on where it matters. Device Software Safety Architecture: Architect and implement the safety-critical software, scoping the safety boundary tightly and owning the FMEA, safety case, and NRTL certification. Metering: Design and implement revenue-grade metering systems, including data acquisition, signal processing, and calibration. Hardware-Software Co-Design: Partner with electrical…
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