Customer Success Engineer

The role

Customer Success Engineers at Nuclearn deploy AI software inside nuclear plants. It's a pretty cool job description to have at a dinner party, and the work behind it is even more interesting than it sounds.

The actual work covers a lot of ground, including standing up our platform on customer infrastructure (sometimes air-gapped), configuring it for the specific plant's workflows, troubleshooting integration issues with engineering, and making sure the operators who use it every day actually get the outcomes we promised.

You'll work directly with nuclear engineers, IT teams, and plant operators. You'll be on site regularly. You'll own customer relationships from go-live through expansion. The work is technical, customer-facing, and grounded in real plant operations.

Why now

Nuclearn is post-PMF and scaling. We're live at 70+ nuclear facilities across North America and the U.K., our customer count is accelerating, and we're hiring our first Head of Customer Outcomes to lead this team as it grows. You'll be joining a team of five CSEs at a moment when the function is getting real structure, real headcount, and real influence on the company's growth.

What you'll own

Deployment and implementation. Install and configure Nuclearn's platform on customer infrastructure, whether on-prem (sometimes air-gapped) or in secure cloud environments. Manage the technical side of integrations with plant systems. Partner with our Engineering team when implementations need custom work.

Customer success and adoption. Make sure customers get the outcomes they bought. That means understanding their workflows, training their users, troubleshooting friction, and identifying adoption gaps before they become retention risks.

Technical advisory. Be the credible technical voice for your customers someone the plant's IT team and engineers respect. Recommend configurations, optimize how they use the platform, and document patterns that scale to other customers.

Customer voice. Surface what you hear from customers to Product and Engineering. You'll know things about how our software is actually used that nobody else at Nuclearn does. That's a responsibility.

About you

You have 3+ years in customer success engineering, technical implementation, or solutions engineering at a B2B software company. You've worked with enterprise customers on complex deployments where the customer's technical team was as smart as you are, and you held your own.

You're genuinely technical. You're comfortable in Linux, you know your way around Docker or Podman, and you can troubleshoot integration issues without escalating every time. You don't need to write production code, but you should be the kind of person engineers respect in a technical conversation.

You're customer-facing by choice. You'd rather be on site at a plant solving a real problem than behind a desk. You handle skeptical, technical buyers without getting defensive. You're comfortable when the customer knows more about their domain than you do your job is to bring deep expertise on our platform, not on theirs.

You're an AI-fluent professional. You use AI tools in your work, you understand what they're good and bad at, and you can talk credibly with customers about how Nuclearn's AI fits into their workflows.

You're comfortable with candor. You'll tell a customer when their setup is the problem. You'll tell Engineering when a bug is real. You'll tell your manager when a deployment is at risk. We say the hard things here, with facts and without spin.

Nice to have, not required:

• Experience in nuclear, utilities, energy, or another regulated industry
• Familiarity with Azure, Terraform, or Kubernetes
• Background working with generative AI, Postgres, or Python
• Prior experience at an early-stage startup where the playbook was still being written

You'll be in your element if...

We try to be honest about where people thrive here, because that saves everyone time. Some patterns we've seen:

• You're comfortable building without a playbook. A lot of what you'll do here, you'll figure out as you go. We're past product-market fit, but we're still building most of the systems around it.
• You're energized by fast cadence. The work moves fast. Customers are growing. Priorities shift. People who do well here lean into that pace rather than waiting for it to settle.
• You bring decisions, not just questions. Our managers expect you to come with "Here's what I'm going to do, unless you tell me otherwise," not "What should I do?"
• You want candid feedback. We tell each other the hard things, with facts and without spin. People who do well here find this energizing, not uncomfortable.
• You like reaching across function lines. Small team means everyone wears multiple hats. The boundary of your role is whatever the work needs, and that's a feature, not a bug.

How we'll know you're winning

Your customers are getting the outcomes they paid for. Deployments land on time. Customers expand to new Nuclearn products because the first one worked. Your peers learn from your customer notes. Engineering trusts the bugs you escalate.

How we work

Our founders are nuclear engineers from Palo Verde who built Nuclearn to bring AI to an industry that needed it, and to do it in a way that actually makes operations better, safer, and smarter. Our team now has 50+ years of combined nuclear experience between them, and it's why our customers trust us with workflows that matter.

We're a values-driven company. Six values shape how we work, and three will be especially visible in this role:

Customer Wins. Their win is our win. CSEs are closest to the customer, which makes you closest to whether we win.

Ownership and Urgency. See it, own it, fix it. We don't wait for permission to do the right thing, and we don't pass problems sideways.

Resourcefulness. Every dollar and hour matters. You'll be supporting multiple customers across a growing portfolio efficiency and judgment about where to spend your time are part of the job.

This role is remote and US-based, with regular travel to customer sites (typically nuclear plants in North America). We have a real HQ in Phoenix where the founders and engineering team work four days a week, and we'd love it if you joined us there but it's not required. Strong remote candidates are very welcome.

A few practical notes

• $95,000 to $115,500 base salary with equity participation
• Remote (US-based); Phoenix HQ option available and welcomed
• Regular travel to customer sites (expect 2540% travel, varying by deployment phase)
• U.S. citizenship or permanent residency required for DOE export compliance

How we hire

Fast, respectful, and practical. Our goal is first conversation to decision in three weeks or less.

1. 20-minute intro with our recruiter or hiring manager to trade context and assess mutual fit
2. Technical conversation with a senior CSE or Engineering teammate
3. Practical work sample (60-90 minutes; a real deployment or troubleshooting scenario)

Nuclearn is an equal opportunity

Nuclear is an industry that has historically drawn from a narrow talent pool, and we think widening that aperture is part of how the industry moves forward. Nuclearn hires the best person for each role regardless of background, and we mean that as a practical commitment, not a legal line. Research shows that women, people of color, and candidates from non-traditional backgrounds are less likely to apply for roles unless they meet 100% of the qualifications. If you can do the work and the role excites you, apply even if your path here doesn't look like the one we described. The best hires we've made often surprised us.

We don't discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.