Senior Full-Stack Product Engineer III

Senior Full-Stack Product Engineer

At PNNL, our core capabilities are divided among major departments that we refer to as Directorates within the Lab, focused on a specific area of scientific research or other function, with its own leadership team and dedicated budget.

Our Science & Technology directorates include National Security, Integrated Discovery Sciences, and Energy and Environment. In addition, we have an Environmental Molecular Sciences Laboratory, a Department of Energy, Office of Science user facility housed on the PNNL campus.

The National Security Directorate (NSD) drives science-based, mission-focused solutions to take on complex, real-world threats to our nation and the world. The AI and Data Analytics Division, part of NSD, combines profound domain expertise and creative integration of advanced hardware and software to deliver computational solutions that address complex data and analytic challenges. Working in multidisciplinary teams, we connect foundational research to engineering to operations, providing the tools to innovate quickly and field results faster.

Our strengths are integrated across the data analytics lifecycle, from data acquisition and management to analysis and decision support.

We are seeking a talented Senior Full-Stack Product Engineer to help design and build the human-facing layer for next-generation AI systems  will create intuitive, trustworthy experiences that help people work with complex data, dynamic content, and user-facing AI agents.

You will work end-to-end with researchers, designers, software engineers, mission experts, and end users—from product discovery and interaction design through implementation, evaluation, deployment, and continuous improvement.

Key Responsibilities:

• Build production web applications and reusable interfaces using React, Type Script and/or JavaScript, HTML, and CSS.
• Work across the stack as needed, including APIs, data services, application state, integrations, testing, deployment, and operational improvement.
• Translate ambiguous mission and user needs into prioritized, executable product plans; make practical tradeoffs among user value, complexity, schedule, performance, accessibility, security, and maintainability.
• Design AI-assisted and human-in-the-loop workflows that provide users with appropriate control, feedback, transparency, and opportunities to review or correct generated results.
• Own features and work streams through the full software-development lifecycle and contribute improvements to shared components, design systems, engineering practices, and standards.
• Mentor junior and associate engineers through pairing, code and design review, documentation, and technical guidance.
• Contribute technical content to proposals and white papers, help scope new work, and support sponsor relationships.

This position is based in Richland, WA and requires an onsite presence.

Minimum Qualifications:

• PhD and 1 year of Software Engineering experience
  -OR-
• MS/MA and 3 years of Software Engineering experience
  -OR-
• BS/BA and 5 years of Software Engineering experience
  -OR-
• AA and 14 years of Software Engineering experience in designing, architecting, programming, deploying, and automating software solutions in support of scientific research or consumer digital product development
  -OR-
• HS/GED and 16 years of Software Engineering experience in designing, architecting, programming, deploying, and automating software solutions in support of scientific research or consumer digital product development

Preferred Qualifications:

• Experience translating ambiguous or loosely defined problems into actionable, prioritized roadmaps, including scoping minimum viable products and adapting plans as requirements change.
• Experience mentoring junior engineers and fostering their growth through pair programming, code and design reviews, and technical guidance.
• Experience developing accessible, responsive, and performant web applications with reusable UI components, integrating frontend with APIs, and supporting specialized user needs.
• Experience building, extending, and integrating backend services and APIs to power user-facing products, as well as handling application state, asynchronous data, and dynamic content.
• Experience applying user-centered design practices such as requirements gathering, prototyping, usability testing, and iterative development, including creating interfaces for AI-assisted workflows and analytical communities.
• Experience utilizing modern frontend tooling and AI-assisted development tools, ensuring code correctness, maintainability, and security, and writing automated tests for UI, components, and integrations.
• Experience contributing technical content to proposals, white papers, or new-work scoping
• Demonstrated continuous learning and technical community engagement through open-source contributions, maintained repositories, technical writing, presentations, conference participation, or self-initiated projects exploring emerging…