Senior Full Stack Developer
- Compensation
- Not disclosed
- Location
- Reston, VA
- Work setup
- Not specified
- Seniority
- Senior
- Employment
- Not specified
- Experience
- 10+ years
- Category
- Fullstack
- Posted
Skills
Must have
- Must have an active TS/SCI with Polygraph
Nice to have
- Agile Frameworks: Practical experience working effectively within an Agile-based development environment (Scrum, Kanban, or similar sprint-based workflows).
- AI & Modern Workflow Familiarity: Practical experience or familiarity supporting AI-adjacent application features, such as conversational/chat interfaces, vector databases, or Retrieval-Augmented Gene
- Containerization (Docker): Experience with Docker configurations, container security, or image hardening is a plus, but containerization is not a strict requirement for this role.
Full description
Leidos is looking for a Senior Full Stack Developer / Senior Software Engineer to guide the technical support, development, and expansion of our core application ecosystem. In this role, you will take immediate hands on ownership of our modern stack built on React.js, Node.js, Python, and PostgreSQL.
Your initial focus will include overseeing a straightforward, simple transition of existing web applications (internal tools and core applications) into our ecosystem. This is a direct, functional transition without the need for complex, heavy migration planning.
As a senior member of the team, you will help scale active applications, design new features, and collaborate with other innovative technology experts to build brand-new software applications from scratch to fill emerging requirements. You will lend your robust engineering skills to support our modern features, including assisting with the integration of AI-driven tools, chat interfaces, workflows, and data pipelines into our core ecosystem. You will work closely within a highly collaborative, fast-moving small team environment.
Technical Execution & Application Support
- Technical Ownership: Act as a core technical lead for all active web applications, taking responsibility for their overall system health, code quality, and technical design.
- Application Support: Oversee day-to-day maintenance, troubleshooting, and operational support to ensure application reliability.
- Seamless Transitions: Manage the simple, direct transition of core tools into our supported ecosystem with minimal friction.
Greenfield Development & Innovation
- New Feature & App Creation: Architect and build high-impact features, optimize backend processing scripts in Python, scale Node.js services, and design high-performance APIs (FastAPI/RESTful).
- Modern Integration Support: Assist with the development and technical plumbing required for emerging features, including chat interfaces, RAG concepts, and intelligent application components.
- Code Quality & Mentorship: Conduct code reviews, establish testing strategies, and mentor a Mid-Level developer to maintain a pristine codebase.
- Foundational Codebases: Set up and maintain foundational repositories, boilerplates, and clean code standards for the React/Node/Python stack.
Basic Qualifications
- Must have an active TS/SCI with Polygraph
- BS degree and 12 – 15 years of prior relevant experience or Masters with 10 – 13 years of prior relevant experience. May possess a Doctorate in technical domain.
- Develops solutions that are highly innovative, and achieved through research and integration of best practices.