# Senior Data Scientist – Fusion Systems at Helion

- Company: Helion
- What the company does: Helion is building the world's first fusion power plant to deliver clean, reliable, and abundant electricity to the grid. Backed by Lightspeed, Peak XV and SoftBank VF.
- Company website: https://helionenergy.com/
- Type: Startups
- Level: Senior
- Location: Everett, WA
- Work setup: On-site
- Pay: $195K to $222K base salary per year (USD)
- Posted: 2026-06-25
- Apply by: 2026-10-08
- Apply: https://jobs.ashbyhq.com/helion/71f44aec-7b3c-4449-a705-9bf55943f689
- Page: https://www.1752.vc/careers/jobs/helion-senior-data-scientist-fusion-systems/

## About the role

You will be responsible for developing the data and knowledge foundation that enables engineers to understand, operate, and improve Helion’s fusion systems. In this role, you will partner closely with engineers, scientists, and operators to transform complex experimental and operational data (including machine telemetry, experimental results, and engineering workflows) into structured datasets, knowledge systems, and AI-enabled tools that support analysis and decision-making.

## What they're looking for

- 7+ years of experience applying statistics, data science, and quantitative methods to complex hardware, physics, or engineering data
- Experience analyzing operational, experimental, and time-series data to identify trends, diagnose hardware behavior, uncover anomalies, and inform engineering decisions is preferred
- Ability to translate ambiguous problems into practical, scalable solutions and partner effectively with engineers and scientists
- Proficiency in Python and modern data science tooling, with experience building data pipelines, analytics infrastructure, or production data systems
- Experience developing structured representations of information, including data models, schemas, metadata frameworks, or ontologies
- Familiarity with LLM APIs and applied AI techniques such as RAG, embeddings, semantic search, and AI-powered workflow automation

Tags: Research & Development