Jr Full Stack Software Developer

Leidos • Washington, VA

2d

About The Position

The Leidos Digital Modernization NISC IV team is looking to hire a Junior Full-Stack Software Developer, with a strong background in modern web technologies and full-stack development, to help develop the CARES web application. The ideal candidate will be experienced in building responsive front-end applications (Angular, TypeScript) and scalable back-end services (C#, .NET Core). Preferred candidates will have experience applying AI-assisted development tools (GitHub Copilot, Claude Code) and bring experience developing or integrating AI into web-based applications. Applicant must have the ability to obtain a Public Trust Security Clearance Suitability (To be eligible for Public Trust Security Clearance, one must be either a U.S. Citizen OR a U.S. Permanent Resident/Green Card holder who has resided in the U.S.A for the past 3 years.) All new hires must pass a drug test prior to starting with Leidos. If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares. Original Posting: March 19, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Pay Range: Pay Range $57,850.00 - $104,575.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Requirements

• Bachelor’s degree in Computer Science, Engineering, or related field
• 0–3 years of professional software development experience.
• Proficiency in C# and experience with .NET (preferably .NET Core / .NET 6+).
• Experience building single-page applications with Angular and TypeScript.
• Basic experience with relational databases (SQL Server / PostgreSQL / MySQL) and writing SQL.
• Familiarity with RESTful APIs, JSON, and web fundamentals (HTTP, XML).
• Working knowledge of Git, Agile development practices, and CI/CD concepts.
• Strong communication skills and ability to work in a team.
• Must have the ability to obtain a Public Trust suitability.

Nice To Haves

• Experience with Entity Framework Core and LINQ.
• Familiarity with ASP.NET Core Web API, middleware, and authentication (OAuth/OpenID Connect).
• Experience with cloud platforms (AWS preferred).
• Hands-on experience with CI/CD tools (Jenkins, Bitbucket Pipelines, GitHub Actions), and static analysis (SonarQube).
• Containerization experience (Docker) and basic Kubernetes knowledge.
• Experience integrating AI services or using AI-assisted coding (e.g., GitHub Copilot) or implementing LLM/AI APIs in web applications.
• Familiarity with Microservice architecture patterns and distributed system fundamentals.

Responsibilities

• Develop, enhance, and maintain web applications using C# and.NET Core (Web API).
• Implement responsive frontend features using Angular and TypeScript.
• Write and maintain SQL queries and schema changes for relational databases (Postgres).
• Implement unit and integration tests.
• Collaborate in Agile teams: participate in sprint planning, stand-ups, and retrospectives.
• Troubleshoot, debug, and resolve defects in development, QA, and other environments.
• Produce and maintain clear technical documentation.
• Follow secure coding practices.

What This Job Offers

• Job Type: Full-time
• Career Level: Entry Level
• Number of Employees: 5,001-10,000 employees