Full Stack Developer

COMPANY OVERVIEW

XCEL Engineering, Inc. is an award‑winning small business that provides trusted information technology, engineering, consulting and project management solutions and services to federal agencies and organizations. Originally founded in 1971 by professional engineers at the University of Tennessee, XCEL was acquired in 2003 by U.S. Army and Navy veterans and in 2023 became a Martin Fed company.

XCEL Engineering is a part of IT Lab Partners (ITLP) which was created to support Oak Ridge National Laboratory (ORNL) in recruiting the best and the brightest technical talent to East Tennessee region. ORNL delivers scientific discoveries and technical breakthroughs needed to realize energy and national security solutions and provides economic benefit to the nation. This premier research institution near Knoxville in Oak Ridge, TN, addresses national needs through impactful research and world‑leading research centers.

Considering joining our impressive team supporting ORNL today!

XCEL Engineering is seeking a versatile Full Stack Software Engineer to support multiple concurrent software projects within a Department of Energy (DOE) Research & Development environment. This role requires an on‑site presence and close collaboration with technical teams, stakeholders, and government clients. The ideal candidate is comfortable working across the entire development lifecycle from gathering client requirements and translating concepts into technical designs, through development, testing, deployment, and long‑term support.

Candidates must be adaptable, detail‑oriented, and capable of managing multiple priorities in a structured, security‑focused environment.

• Collaborate with government clients and internal stakeholders to gather, analyze, and refine technical and functional requirements.
• Design, architect, and develop full‑stack applications from concept to completion.
• Work on multiple simultaneous projects with varying timelines and technical scopes.
• Develop scalable backend services and APIs.
• Build responsive, user‑friendly front‑end interfaces aligned with UI/UX best practices.
• Participate in code reviews, testing, debugging, and performance optimization.
• Maintain documentation for system architecture, code, and processes.
• Ensure compliance with security, privacy, and operational standards required in a federal R&D environment.
• Provide ongoing maintenance, enhancements, and technical support for deployed applications.

• Bachelor's degree in a scientific field or equivalent combination of education and experience coupled with 8 years of software development experience.
• Bachelor degree in Computer Science, Software Engineering, or related field (or equivalent practical experience).
• 3+ years of professional full‑stack development experience
  • JavaScript, Type Script, Python, SQL
  • Backend Frameworks‑Fast API
  • Frontend Frameworks Vue.js 2 & Vue.js 3
  • State Management‑Pinia
  • UI Libraries‑Vuetify
  • Databases‑PostgreSQL
  • Other Technologies‑GraphQL
• Demonstrated experience delivering production‑ready applications end‑to‑end.
• Strong communication skills and ability to translate business needs into technical solutions.
• Ability to obtain and maintain any required facility clearances or background checks.
• Work Environment:
  On‑site presence is required due to the secure nature of the facility.
• Collaborative, mission‑driven R&D atmosphere.
• Opportunity to contribute to projects with national‑level impact and long‑term technical value.

• Java development experience
• Experience working in government, national laboratory, or regulated environments
• Familiarity with CI/CD pipelines and Dev Ops practices
• Containerization technologies (Docker, Kubernetes) Experience with automated testing frameworks

• Inside office environment.
• Working on a computer for long periods of time.
• May involve long period of sitting at a desk.
• The work environment is fast‑paced and sometimes involves extreme deadline pressures.

This job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are…