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MBA CSi

Software Developer (Microsoft C#)-26-00097L

Merrifield, VA, United States

$90,000 to $100,000 USD / year

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Job details

Pay: $90,000 to $100,000 USD / year
Experience: Minimum of 5 years of professional experience in software development or a closely related technical field.
Posting language: English
Posted: Nov 9, 2026

Original job description

MBA Consulting Services, Inc. (MBA CSi) is seeking an experienced Software Developer (Microsoft C#) to support the United States Postal Service (USPS) Engineering organization in Merrifield, VA. In this role, you will design, develop, enhance, and maintain software applications that support critical engineering and technology initiatives across USPS operations. This is an excellent opportunity for a skilled developer who enjoys solving complex technical challenges, working with innovative technologies, and contributing to software solutions in a fast-paced research and development (R&D) environment. You will collaborate with engineers, software developers, and technical teams to develop applications, integrate systems, and deliver reliable, scalable solutions that support USPS modernization efforts. The ideal candidate will bring strong experience in Microsoft C#, .NET, Windows Forms (WinForms), SQL, web services, multithreaded programming, and application integration, along with the creativity and technical expertise needed to support evolving engineering requirements. This is a full-time position located onsite at USPS Engineering Headquarters in Merrifield, VA. One day of telework per week may be considered after successfully completing an initial 30-day probationary period.

Responsibilities

Design, develop, modify, test, implement, and maintain software applications using Microsoft C# and the .NET framework.
Develop and support Windows Forms (WinForms) applications, including kiosk-based software solutions.
Design and implement database interfaces, write SQL queries, and support data integration between applications and systems.
Develop web applications, web services, and APIs utilizing XML and JSON for data exchange.
Design and implement multithreaded C# applications to improve software performance, responsiveness, and efficiency.
Support application integration using technologies such as Kafka and APIs.
Utilize Microsoft Visual Studio and source control tools, including Team Foundation Server (TFS) or GitHub CI/CD, to manage software development activities.
Participate in all phases of the Software Development Life Cycle (SDLC), including requirements analysis, design, development, testing, deployment, and maintenance.
Collaborate with engineers, developers, and project team members to develop technical solutions that meet operational and business requirements.
Troubleshoot, debug, and resolve software issues while providing technical support for applications and operating systems.
Support software installation, configuration, upgrades, and ongoing system maintenance.
Contribute innovative ideas and technical solutions in a fast-paced research and development environment.
Prepare and maintain technical documentation related to software design, development, and implementation.

Basic Qualifications

Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related technical field.
Minimum of 5 years of professional experience in software development or a closely related technical field.
Strong experience developing applications using Microsoft C# and the .NET framework.
Proficiency with Microsoft Visual Studio IDE and source control tools, including TFS or GitHub CI/CD.
Hands-on experience developing C# Windows Forms (WinForms) applications, including kiosk software design.
Experience designing database interfaces using C# .NET and writing SQL queries.
Experience developing web applications, web services, and APIs using XML and JSON.
Demonstrated experience with C# multithreaded programming and application design.
Experience with data integration technologies, including Kafka and APIs.
Strong understanding of the Software Development Life Cycle (SDLC) and software development best practices.
Excellent analytical, troubleshooting, and problem-solving skills.
Strong communication and collaboration skills, with the ability to work effectively in a multidisciplinary technical environment.
Ability to work independently, manage competing priorities, and adapt to changing requirements in a fast-paced R&D environment.
Must be able to work onsite in Merrifield, VA, in accordance with the position's work schedule.
Must successfully pass a pre-employment background check and drug screening.

Preferred Qualifications

Experience with Microsoft Entity Framework for database access and application development.
Familiarity with Microsoft Windows operating systems, including Windows 10 and Windows Server environments.
Experience developing applications using Windows Presentation Foundation (WPF).
Knowledge of user interface (UI) design technologies, including speech recognition, text-to-speech, and other interactive technologies.
Familiarity with Section 508 accessibility requirements and accessible user interface design.
Experience with additional programming languages beyond Microsoft C#.
Experience developing or integrating hardware drivers and software interfaces with physical equipment.
Ability to demonstrate previously developed software applications or current technical projects.
Experience with system administration or database administration (DBA).
Previous experience supporting engineering, automation, or research and development environments.
Experience developing software applications that interface with specialized equipment or hardware systems.

Salary Range-$90,000-$100,00

MBA CSi is an Equal Opportunity Employer. Women, Minorities, Veterans, and individuals with disabilities are encouraged to apply. EOE – Minority/ Female/ Veteran/ Disabled

Health Care Plan (Medical, Dental & Vision)
Retirement Plan (Safe Harbor 401k)
Life Insurance (Basic, Voluntary & AD&D)
Paid Time Off (Vacation, Sick & Public Holidays)
Short Term & Long Term Disability
Training & Development

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More about this job

Skills

C#
Collaborate with engineers
.NET
Microsoft Windows
SQL
Microsoft .NET Framework
Apache Kafka
Microsoft Visual Studio
Microsoft Team Foundation Server
GitHub
CI/CD
Software development
Troubleshoot
Technical support
Research
Documentation
Computer science
Computer technology
IDE
Troubleshooting
Problem solving
Communication skills
Collaboration
Work independently
Microsoft Windows Server
Speech recognition
UI design
Programming languages
System administration
Database administration

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Jobs in the United States