Mid-Level Software Developer C#.NET 🏆
3Si Security SystemsRole Overview
3Si Security Systems is hiring a mid-level Mid-Level Software Developer C#.NET 🏆. This is a full-time role in Ashburn. Part of 3Si Security Systems's Lifecycle hiring. The posted range is $78k to $118k. Full responsibilities, required qualifications, and the apply link are listed in the description below.
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Job Description
Mid-Level Software Developer 💰 Salary: $78,000 - 118,000 per year
At 3Si Security Systems we are looking for a C#.NET engineer!
🛠️ Our tech stack:
.NET Framework, C#, Git, HTTP, Support, JIRA, Network, REST, Security, Telerik, Visual Studio, WPF, Windows, UX UI Design, ASP.NET, .NET
📝 Rquirements:
- Strong understanding of full-stack development practices
- Proficiency in C# and the .NET framework
- Experience with Windows Presentation Foundation (WPF)
- Knowledge of software development best practices and secure coding techniques
- Ability to work with RESTful APIs and HTTP network technologies
- Skilled in using Visual Studio, Git, and Jira
- Strong problem-solving and analytical abilities
- Effective communication and collaboration skills
- Ability to work independently or within a team environment
- Bachelors degree in Computer Science, Information Technology, Software Engineering, or a related technical field
- Equivalent professional experience may be considered in lieu of formal education
- Associate degree in a technical discipline combined with relevant experience and/or industry certifications may also be considered
- At least 5 years of related software development experience
- Minimum of 3 years of hands-on experience in C#/.NET development
- Experience with reusable C# library development and version-controlled environments
👩💻👨💻 Your responsibilities are:
- Participate in full software development lifecycle activities, including design, development, testing, debugging, and implementation
- Define and document functional requirements based on stakeholder feedback
- Design and develop scalable software solutions utilizing C# and .NET
- Collaborate with peers and cross-functional teams to ensure technical alignment with project objectives
- Employ development tools such as Visual Studio, Git, and Jira
- Work with technologies including REST/ServiceStack, WPF, and Progress/Telerik UI Toolkit
- Support and maintain client and server applications using REST and HTTPS protocols
- Undertake additional tasks as required to support the companys mission and project goals
View this job and over 500 other transparent jobs with salaries (💰💰💰) & tech stacks (🛠️) on DevITJobs
Category: C#.NET Developer / Engineer
Location address: Red Rum Drive 21660, Arlington, United States
Salary: $78,000 - 118,000 per year
Benefits & perks that we offer:
3Si Security Systems - More about us and the role:
At 3Si, our mission is to enhance safety across the globe through innovative security technology. We are a leading entity in the field, enabling businesses and law enforcement to effectively counter and respond to crime with our proven solutions and strong partnerships. With over 100 years of collective experience, our specialized focus on GPS tracking, video surveillance, and integrated response technologies is aimed at various sectors, including retail and finance. We foster a collaborative, purpose-driven culture, offering a hybrid work environment, competitive benefits, and opportunities for personal and professional growth. Join us in our commitment to making a meaningful impact in our communities.
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Frequently Asked Questions
How do I apply for the Mid-Level Software Developer C#.NET 🏆 position at 3Si Security Systems?
Use the Apply button above to submit your application directly to 3Si Security Systems. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.
Where is the Mid-Level Software Developer C#.NET 🏆 position at 3Si Security Systems located?
This position is based in Ashburn. 3Si Security Systems has not indicated remote or hybrid options for this role, so candidates should plan for on-site work.
How much does the Mid-Level Software Developer C#.NET 🏆 role at 3Si Security Systems pay?
3Si Security Systems has posted a compensation range of $78k to $118k for this position. Final offers typically vary based on candidate experience, location, and internal salary bands.
When was the Mid-Level Software Developer C#.NET 🏆 role at 3Si Security Systems posted?
This role was posted on March 20, 2026 (85 days ago). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.
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