Sr .NET Software Developer

Company: Leidos
Location: Silver Spring
Posted on: April 1, 2026

Job Description:

The Leidos Digital Modernization NISC IV team is looking to hire a skilled Sr .NET Software Developer to help develop the CARES web application. Your duties will primarily revolve around web application development by writing code and modifying software to fix errors, adapt it to new hardware, improve its performance, or upgrade interfaces. You will also be involved in directing system testing and validation procedures and working with customers or departments on technical issues, including software system design and maintenance. To be successful in this role, you will need extensive knowledge of languages and the software development lifecycle. 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. Primary Responsibilities: Develop, enhance, and maintain .NET applications and handle front and backend development procedures. Perform tasks using SQL database systems Design, configure, develop, and implement enhancements and production fixes to existing systems. Develop and implement new systems and ensure their configuration is handled correctly. Use development best practices and appropriate patterns to develop required software solutions. Create and maintain technical documentation, including user manuals and guides. Formulate and define system scope and objectives based on the individual needs of each user. Analyze and revise existing system logic difficulties and ensure that technical knowledge of all phases of application systems is maintained. Develop, maintain, and support existing web applications and analyze and convert business requirements as needed. Perform object-oriented analysis and design, and diligent testing to ensure optimal performance of all assigned systems and system modules. Required Qualifications: Bachelors degree and a minimum of 8 years of prior relevant experience. Additional years of experience or education will be considered in place of a degree. Experience delivering entire projects or processes spanning multiple technical areas. Deep understanding of software lifecycle. Working knowledge of Agile Development, continuous integration, and continuous delivery methodologies and tools. Strong, self-motivated desire to learn new programming languages, tools, frameworks, and techniques. Must have: The ability to complete tasks independently with minimal direct supervision. The ability to work and collaborate effectively within a multi-disciplined engineering team. Experience working with the .NET framework, Entity framework and Linq Experience working with Angular 9 or greater Experience working with languages (C#) Experience working with basic web technologies (XML, REST, JSON) Experience working with frontend web technologies (Javascript, Typescript, HTML, SCSS) Hands-on experience in DevOps and CI/CD tools integrations (Bitbucket, SonarQube, Etc.) Experience with Microservice Architecture Experience with writing and implementing Unit Tests Experience working with Agile Development methodologies. Experience with leveraging Cloud data services Experience working with at least one Relational Database Management System (PostgreSQL, Oracle, MySQL, SQL Server, etc.) . Experience working with a Jenkins pipeline. 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 17, 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 $107,900.00 - $195,050.00 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.

Keywords: Leidos, Silver Spring , Sr .NET Software Developer, IT / Software / Systems , Silver Spring, Maryland