Nuclearn builds an AI platform that automates critical operational workflows for nuclear power plants.
<p></p> <p><strong data-olk-copy-source="MessageBody">The Nuclear Company</strong> 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.</p> <p><strong>We operate with an AI-first mindset.</strong> 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.</p> <p><strong>We hire people who are driven by purpose, thrive in ambiguity, and are energized by building what has never been built before.</strong> Our team combines intellectual curiosity with high agency, embraces candid feedback and continuous learning, and holds themselves and others to exceptional standards. Our values—<strong>Transparency, Responsibility, Unity, Scrappiness, and Tenacity</strong>—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.</p> <p><strong><span class="TextRun SCXW174644119 BCX0" lang="EN-US" data-contrast="auto"><span class="NormalTextRun SCXW174644119 BCX0">About the role</span></span></strong></p> <p><span data-contrast="auto">The Nuclear Company is searching for an </span><strong><span data-contrast="auto">Application Security Engineer</span></strong><span data-contrast="auto"> to help secure the software, data systems, and developer workflows that power our Nuclear Operating System, internal platforms, and mission-critical applications. This is a high-ownership role for a builder who is equally comfortable reviewing application architecture, threat modeling an API, improving GitHub security controls, and partnering directly with engineers to ship secure software quickly.</span><span data-ccp-props="{}"> </span></p> <p><span data-contrast="auto">You will work across product engineering, platform engineering, data science, infrastructure, and operations to embed security into the way we design, build, test, and deploy software. You will help define secure development standards, review high-impact product designs, harden CI/CD workflows, and guide teams through vulnerability remediation in a practical, risk-based way.</span><span data-ccp-props="{}"> </span></p> <p><span data-contrast="auto">This role reports to the Senior Manager for Application and Product Security.</span></p> <p><strong><span class="EOP SCXW174644119 BCX0" data-ccp-props="{"134245417":false,"201341983":0,"335559740":240}">Responsibilities</span></strong></p> <p><strong><span data-contrast="none"><span data-ccp-parastyle="heading 3">Application & Product Security</span></span></strong><span data-ccp-props="{"134245418":true,"134245529":true,"335559738":160,"335559739":80}"> </span></p> <ul> <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"><span data-contrast="auto">Perform security reviews and threat models for NOS modules, internal tools, APIs, data workflows, AI-enabled features, and cloud-connected applications. </span><span data-ccp-props="{"335559739":0}"> </span></li> <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"><span data-contrast="auto">Partner with engineering teams to identify and remediate risks across authentication, authorization, tenant isolation, input validation, secrets handling, encryption, logging, and data access. </span><span data-ccp-props="{"335559739":0}"> </span></li> <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"><span data-contrast="auto">Review application designs and code changes for security issues before they become production risk. </span><span data-ccp-props="{"335559739":0}"> </span></li> <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"><span data-contrast="auto">Define reusable security patterns for web applications, APIs, mobile workflows, internal platforms, and data-heavy systems. </span><span data-ccp-props="{"335559739":0}"> </span></li> <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"><span data-contrast="auto">Help establish secure-by-default approaches for applications that support regulated, high-consequence infrastructure. </spa