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Backend Engineer

The Nuclear Company - Washington, DC, United States - In-office - posted 2026-07-31

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The Nuclear Company is a Series A AI-first startup pioneering next-generation nuclear reactor deployment through a design-once, build-many model. They are seeking a Backend Engineer to build server-side systems for NOS (Nuclear Operating System), their software platform supporting one of the largest nuclear buildouts in the United States. In this hands-on engineering role, you will report to the Director of Product Engineering and work within the Product Engineering squad. Your primary responsibilities include designing and building backend services and APIs for NOS applications, modeling and accessing data efficiently, and ensuring the server side is reliable, secure, and performant in a regulated, safety-critical environment. You will write production code, review pull requests, debug production issues, and collaborate with Staff Software Engineers on application development and with the platform squad on shared services. The role requires building backends that meet the stringent requirements of nuclear operations, where reliability and safety are paramount. The company operates with an AI-first mindset, expecting all employees to leverage AI and technology to improve quality, speed, and impact. You'll be expected to identify opportunities to automate workflows, enhance decision-making, and contribute to the evolution of NOS as a strategic operating capability. The Nuclear Company values purpose-driven individuals who thrive in ambiguity and are energized by building novel solutions. Their core values—Trust, Responsibility, Unity, Scrappiness, and Tenacity—guide hiring and collaboration. Trust underpins their safety culture, fostering intellectual honesty and accountability, while the team executes with urgency, humility, resilience, and commitment to their mission.

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