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Director of Software Engineering

Nuclearn

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

  • 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.

Delivery, reliability & AI‑assisted dev

  • 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.

Data connectors, integrations & AI pipelines

  • 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).

Product, UX/UI & AI Experience

  • 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.

Security, compliance & AI governance

  • 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.

Customer‑facing engineering

  • 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.

Cross‑functional leadership

  • 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).

Examples of Near‑term problems you'll tackle (first 90 days)

  • 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.

You'll thrive here if you…

  • 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.

Nice To Have (not Required)

  • 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.

The stack you'll shepherd

  • 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

Compensation & Benefits

  • 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

Work model & travel

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

We aim to move from first chat to decision quickly.

Ready to lead engineering that keeps critical infrastructure running? We'd love to meet you.