X-energy

Software Engineer III, AI Digital & Engineering Software

X-energy
Apply
2 months ago
Rockville, MD, USASenior

Base Salary

$150k - $180k/yr

Responsibilities

  • Develop production-ready AI-native applications, autonomous agents, agentic workflows, and supporting platform infrastructure.
  • Use Claude Code and other AI-assisted development tools for implementation, prompt iteration, and maintenance.
  • Build front-end and full-stack applications with React, TypeScript, Tailwind CSS, Vite, AWS services, WebSockets, and REST APIs.
  • Develop AWS Bedrock agent architectures, multi-turn workflows, RAG and Graph-RAG systems, MCP tools, and AI evaluation and safety pipelines.
  • Build governed AWS data lakehouse and engineering-data integration capabilities using S3, Glue, Lake Formation, Athena, Iceberg, CDC pipelines, and enterprise engineering-system connectors.
  • Design and maintain containerized applications, GitLab CI/CD pipelines, Terraform-managed AWS infrastructure, observability, release automation, and production support.
  • Collaborate with systems-engineering, licensing, quality-assurance, development, and internal customer teams to document architecture, validate solutions, and meet nuclear-quality and regulatory expectations.
  • Support data governance, identity federation, export-control requirements, data lineage, validation pipelines, technical roadmaps, reviews, prototypes, and on-call incident response.

Requirements

  • Bachelor’s degree in Computer Science, Artificial Intelligence, Systems Engineering, Engineering, or a related field from an accredited institution.
  • Typically five years of relevant software engineering experience, including experience in at least one listed specialization track.
  • Experience with Git, GitLab, CI/CD, modern development workflows, Jira, Confluence, and AI-enhanced development environments such as Claude Code.
  • Experience working collaboratively in fast-paced development teams and communicating complex technical concepts to technical and non-technical audiences.
  • Track A applicants should have working knowledge of React, TypeScript, JavaScript, Vite, Bun, Tailwind CSS, WebSockets, REST APIs, user-interface development, and AWS web-application deployment.
  • Track B applicants should have knowledge of LLMs, agentic architectures, AWS Bedrock or comparable tools, LangChain, LangGraph, LlamaIndex, RAG, Graph-RAG, TypeScript, Python, Node.js/Express, FastAPI, and AI evaluation methods or frameworks.
  • Track C applicants should have experience or familiarity with data lakes/lakehouses, ETL, AWS data services, Apache Iceberg, Delta Lake or Apache Hudi, canonical data models, schema governance, enterprise engineering-system integrations, identity federation, and engineering data formats.
  • Track D applicants should have experience with Docker, GitLab CI/CD, AWS ECS, ECR, VPC, Terraform, release automation, monitoring and observability, Linux or macOS command-line environments, and container orchestration.
  • Preferred qualifications include experience in nuclear energy, aerospace, defense, or other regulated fields; digital engineering, MBSE, PLM and requirements systems; graph databases; NQA-1; 10 CFR 50 Appendix B; AWS GovCloud; FedRAMP; ITAR, EAR, or 10 CFR 810; and MCP tool development.

Benefits

  • Hybrid work schedule requiring office attendance Tuesday, Wednesday, and Thursday, with the work site in the Rockville/Gaithersburg, Maryland area.
  • Full-time exempt position with standard hours of 8:00am-5:00pm ET, Monday-Friday.
  • Up to 10% travel as needed.
  • 401(k) plan with employer match.
  • Medical, dental, and vision insurance.
  • Life and disability insurance.
  • Paid time off.
  • Tuition reimbursement and professional development support.

Tech Stack

Amazon DynamoDBAWSDatadogDockerExpressFastAPIGitJavaScriptNeo4jNode.jsPythonReactRedisTailwind CSSTerraformTypeScript

Categories

AI ApplicationsData EngineeringDevOps
X-energy

About X-energy

1,001-5,000 employees

X-energy designs and sells advanced high-temperature gas-cooled small modular reactors (Xe-100) and TRISO nuclear fuel for utilities and energy-intensive industries. Privately held and headquartered in Rockville, Maryland, the company is building its TRISO-X fuel manufacturing campus in East Tennessee to support commercial deployment. It provides reactor and fuel supply, licensing support, and lifecycle engineering services for grid power, industrial heat, and microreactor applications.

Contact me