Prolific Machines is ushering in a new era of biotechnology with light. Our first-of-its-kind optogenetic platform delivers unprecedented control, precisely guiding cellular behavior when and where it matters most. Unlike existing tools used to control biology, our technology enables dynamic, tunable control over virtually any cellular function in any cell type. We're enabling partners to unlock robust efficiency, quality, and reproducibility advantages across the most complex pharmaceuticals and therapeutic proteins. Prolific is supported by leading investors, including Bill Gates’s Breakthrough Energy Ventures, Mayfield and SOSV. This is a high-ownership role with significant opportunity to shape the long-term direction of software systems at Prolific. As a foundational Software Engineer within the organization, you will have substantial influence over architecture, tooling, and long-term technical direction. We’re looking for a Software Engineer to help define and build the next-generation software and controls platform underlying Prolific’s illumination systems. This role will serve as a foundational software hire within a multidisciplinary illuminator technology team, helping define software architecture across device control, cloud-connected infrastructure, internal tooling, and future customer-facing systems. This individual will work closely with Firmware, Hardware, Data, and Bioprocess Engineering teams to develop scalable, production-ready control systems for next-generation illumination products. Over time, this role is expected to help define software architecture, interfaces, and development strategy as Prolific expands both internal software capabilities and external development partnerships. This is not a traditional consumer web or SaaS role. Success in this position requires strong systems thinking and comfort operating across the hardware/software boundary. The ideal candidate enjoys working in-person, operating close to real-world systems and hardware, and is comfortable working across abstraction layers rather than specializing narrowly in frontend or backend development. This role will be primarily based on-site in Emeryville, CA with some hybrid flexibility depending on current project needs.