Staff Software Engineer - NOS

The Nuclear Company is the fastest growing AI tech-enabled startup in the nuclear and energy space, pioneering a fleet-scale approach to building the next generation of nuclear reactors. Through our design-once, build-many model, we're accelerating the deployment of safe, reliable, and affordable nuclear energy. We operate with an AI-first mindset.

Every employee is expected to leverage AI, technology, and the Nuclear Operating System (NOS) as integral components of their role to improve the quality, speed, and impact of their work. We expect every team member to continuously identify opportunities to automate workflows, enhance decision-making, improve processes, and contribute to the ongoing evolution of NOS as a strategic operating capability that enables The Nuclear Company to scale with excellence. We hire people who are driven by purpose, thrive in ambiguity, and are energized by building what has never been built before.

Our team combines intellectual curiosity with high agency, embraces candid feedback and continuous learning, and holds themselves and others to exceptional standards. Our values— Transparency, Responsibility, Unity, Scrappiness, and Tenacity —guide how we hire, collaborate, and make decisions every day. They are not words on a wall; they are the standard by which we operate.

TRUST is the foundation of our safety culture, fostering intellectual honesty, accountability, and open communication, while our values challenge every team member to execute with urgency, humility, resilience, and an unwavering commitment to our mission.

About The Role

The Nuclear Company is hiring a Staff Software Engineer to lead the build of NOS modules and applications. You will report to the Director of Product Engineering and work in the Product Engineering squad. NOS is the software platform behind one of the largest nuclear buildouts in the United States, and this is a senior technical role that sets the standard for how the products get built.

This is a hands-on staff-level role. You will design and build NOS applications across desktop, mobile, and in-field surfaces, make the hard architecture calls, and raise the engineering standard for the squad. You work with platform engineers on the layers underneath and with product engineers building alongside you.

You will write production code, lead design and code reviews, mentor other engineers, and partner with business line stakeholders to turn operational needs into working software. When something is hard or stuck, you are the engineer who drives it to a decision.

Responsibilities

Lead the technical build. Design and build NOS modules and applications across desktop, mobile, and in-field surfaces, and own the hard architecture decisions. Set the engineering standard.

Lead design and code reviews, define patterns and practices, and raise code quality across the squad. Build with business stakeholders. Work directly with business line owners to turn operational and regulatory needs into working software.

Integrate with the platform. Work with platform engineers so applications use shared services, data, and the unified interface correctly. Mentor and multiply.

Coach other engineers, unblock them, and grow the technical depth of the team. Drive the hard problems. Step into the toughest cross-team technical issues and drive them to resolution.

Required Experience 8+ years building and shipping production software, with a track record at senior or staff level. Bachelor's or Master's in Computer Science, Software Engineering, or a related technical field, or equivalent production experience. Deep skills in at least one major language and stack, plus strong architecture and design judgment.

Experience shipping applications across more than one surface (web, desktop, mobile, or embedded). Experience leading technical design and mentoring engineers without formal authority. Experience with at least one major cloud (AWS preferred) and modern CI/CD.