# Senior Full Stack Developer / Senior Software Engineer

**Company**: Leidos
**Location**: Reston, VA
**Experience**: senior
**Job type**: full-time
**Salary**: $131,300.00 - $237,350.00
**Category**: Engineering
**Industry**: Technology

**Apply**: https://leidos.wd5.myworkdayjobs.com/en-US/External/job/Reston-VA/Senior-Full-Stack-Developer_R-00195468-1?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/job/senior-full-stack-developer-senior-software-f9004c58-f37/

## Description

Leidos is seeking a Senior Full Stack Developer / Senior Software Engineer to lead the technical support, development, and expansion of its core application ecosystem.

The ideal candidate will have immediate hands-on ownership of a modern stack built on React.js, Node.js, Python, and PostgreSQL.

Key responsibilities include:

- Technical Ownership: Act as a core technical lead for all active web applications, ensuring 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 transition of core tools into the supported ecosystem with minimal friction.

- 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.

- Modern Integration Support: Assist with the development and technical plumbing required for emerging features, including chat interfaces and intelligent application components.

- Code Quality & Mentorship: Conduct code reviews, establish testing strategies, and mentor a Mid-Level developer to maintain a pristine codebase.

The role requires:

- Expertise in JavaScript/TypeScript Ecosystems, with strong experience building production-grade web applications using React.js and Node.js.

- Python & API Proficiency, with strong experience using Python for backend services and building robust RESTful APIs.

- Database Design, with strong command of PostgreSQL and schema design.

- C# / .NET Literacy, with ability to read and understand legacy structures.

- Modern Tooling, with deep familiarity with Git and CI/CD concepts.

Preferred qualifications include:

- Agile Frameworks, with practical experience working effectively within an Agile-based development environment.

- AI & Modern Workflow Familiarity, with practical experience or familiarity supporting AI-adjacent application features.

- Containerization, with experience with Docker configurations.

The role offers a salary range of $131,300.00 - $237,350.00.

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## Skills

### Required
- React.js
- Node.js
- Python
- PostgreSQL
- JavaScript/TypeScript
- FastAPI
- Git
- CI/CD
- C#/ .NET

### Nice to have
- Agile Frameworks
- AI & Modern Workflow
- Containerization (Docker)
- RAG concepts
- conversational/chat interfaces
- vector databases

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Source: [Apply at leidos.wd5.myworkdayjobs.com](https://leidos.wd5.myworkdayjobs.com/en-US/External/job/Reston-VA/Senior-Full-Stack-Developer_R-00195468-1?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)