Director of Software Engineering
Nuclearn
Software Engineering
Phoenix, AZ, USA
USD 180k-214k / year + Equity
Posted on Aug 16, 2025
Why Nuclearn.ai
Nuclearn.ai builds AI‑powered software for the nuclear and utility industries - tools that keep critical infrastructure reliable, efficient, and safe. Our software integrates AI driven workflow, documentation, and research automation and is already used at 60+ nuclear reactors across North America. We need a hands‑on engineering leader to turn that momentum into disciplined, reliable delivery.
This is a new role. All software engineers will report through you. You'll shape the org, raise the bar on reliability, and ship features that matter to real plants.
Eligibility: U.S. citizenship or permanent residency (green card) is required due to DOE export compliance.
The role & impact
You'll own engineering execution across a modern Python/React stack and a regulated, customer‑integrated environment. That means building the team, hardening the platform, and shipping - often in the same week. This is a working director role. You will code, review, and design while setting the bar for how we blend modern software engineering with production‑grade AI.
People & org
Full‑time, salaried. Hybrid at Phoenix HQ (≥80% in‑office; Wednesdays remote). Occasional travel to customer sites, conferences, or auditors as needed.
How We Hire (fast, Respectful, Practical)
Ready to lead engineering that keeps critical infrastructure running? We'd love to meet you.
Nuclearn.ai builds AI‑powered software for the nuclear and utility industries - tools that keep critical infrastructure reliable, efficient, and safe. Our software integrates AI driven workflow, documentation, and research automation and is already used at 60+ nuclear reactors across North America. We need a hands‑on engineering leader to turn that momentum into disciplined, reliable delivery.
This is a new role. All software engineers will report through you. You'll shape the org, raise the bar on reliability, and ship features that matter to real plants.
Eligibility: U.S. citizenship or permanent residency (green card) is required due to DOE export compliance.
The role & impact
You'll own engineering execution across a modern Python/React stack and a regulated, customer‑integrated environment. That means building the team, hardening the platform, and shipping - often in the same week. This is a working director role. You will code, review, and design while setting the bar for how we blend modern software engineering with production‑grade AI.
People & org
- Own the org design (backend, frontend) and the architecture that supports it;
- Hire, onboard, and coach ICs and leads; set clear growth paths and expectations.
- Run the rooms: weekly planning, architecture/design sessions, AI+UX charrettes, post‑incident RCAs, and incident drills.
- Build an AI‑enabled engineering culture - when and how to use AI pair programming, code generation, and test synthesis safely.
- Own SDLC and release management (branching, feature flags, safe rollbacks).
- Institute typed APIs and schema migration discipline (backfills, idempotency, partitioning).
- Drive Sentry triage and error‑budget/SLOs; implement retries, back‑pressure, DLQs, circuit breakers.
- Embed AI in the toolchain: automated test generation, static‑analysis + AI code review prompts, release‑note drafting, log summarization, etc.
- Define “customer‑visible reliability” metrics (uptime, success rates, SLA adherence) and publish them internally.
- Lead robust integrations with DevonWay, Maximo, and Microsoft 365 (Teams/OneNote).
- Build safe, traceable re‑processing (versioned transforms, replayable queues, full lineage).
- Stand up retrieval pipelines that can power in‑product AI (schema‑aware indexing, PII filtering, audit logs).
- Rethink UX with AI: design “copilot‑style” flows in CAP AI and AtomAssist that propose, simulate, explain, then apply - with human‑in‑the‑loop gates and diffs you can trust.
- Partner with Design to create AI‑first UI patterns (natural‑language to action, draft‑to‑diff changes, semantic search across customer content) that map to utilities' workflows and approvals.
- Embed secure SDLC and change control that satisfy SOC 2/ISO 27001 without stalling delivery.
- Support vendor risk reviews and DPAs in MSAs; help field enterprise questionnaires.
- Join key utility calls to scope integrations, demo AI‑enhanced capabilities, and close feedback loops.
- Translate constraints into backlog, SLAs, rollout plans, and clear acceptance criteria.
- Partner with Product on quarterly planning and the “toward 100% automation” roadmap.
- Work with Customer Success on renewals (license entitlements, usage reporting, uptime) and measure time saved and AI suggestion acceptance as value proof.
- Present progress and risks to founders and the board with clear, actionable metrics (DORA, SLOs, AI‑assist KPIs).
- Reliability: Cut a noisy class of Sentry errors by 30%+ via task idempotency, DLQs, and AI‑assisted log triage.
- Automation guardrails: Roll out “simulate → review → apply” gating for CAP automations with dry‑run diffs, explanations, and full audit trails.
- Data pipeline: Deliver a OneNote → AtomAssist connector: tabular ingest, strict schema validation, safe reprocessing, lineage.
- Process: Stand up lightweight engineering metrics (DORA), on‑call, incident response, RCA templates; add AI to draft postmortems.
- Org: Fill priority roles (e.g., Full Stack Engineers) and level up existing teams with crisp ownership.
- Have led 5 - 20+ engineers across multiple disciplines at a startup or regulated enterprise.
- Are a player‑coach: you can dig into FastAPI/React/Postgres/Celery and still scale the org.
- Care about correctness and safety: typed contracts, migrations with backfills, idempotent jobs, tests that catch sharp edges.
- Have shipped AI‑powered features and know how to measure and improve trust (evals, guardrails, human‑in‑the‑loop).
- Are comfortable with utility customers—able to demo, clarify constraints, and negotiate pragmatic workarounds.
- Communicate clearly under pressure and keep teams focused when the alerts page lights up.
- Experience with RAG/data pipelines, vector search, feature stores, or LLM ops (prompt/versioning, evals, monitoring).
- Background in nuclear/utility or other safety‑critical domains (aviation, med‑device, rail).
- SOC 2/ISO 27001 experience.
- Familiarity with Maximo, DevonWay, Microsoft 365 integrations.
- Frontend: React, JavaScript, HTML/CSS
- Backend: Python (FastAPI)
- Data/Infra: PostgreSQL, SQLite; Redis, RabbitMQ, Celery
- DevOps: Docker/Podman, Kubernetes; GitHub Actions
- Observability: Sentry, Netdata
- Quality: PyTest, Cypress
- Collab: Git/GitHub
- Base salary: $180k - $214k
- Equity: 0.10% - 0.28%, in the form of stock options
- Bonus: 10%, annual
- Benefits: Unlimited PTO, health/dental/vision insurance
Full‑time, salaried. Hybrid at Phoenix HQ (≥80% in‑office; Wednesdays remote). Occasional travel to customer sites, conferences, or auditors as needed.
How We Hire (fast, Respectful, Practical)
- 20‑min founder intro to trade context and assess mutual fit
- Leadership & systems deep dive (org design, SDLC, reliability plan)
- Team panel + working session (design review or incident/RCA exercise)
- Final chat on 90‑day plan & success metrics
Ready to lead engineering that keeps critical infrastructure running? We'd love to meet you.