Top 1351 C#.net developer Jobs in Arlington, Va

AP108 HEASARC Senior Scientific Software Developer
ADNET Systems, Inc. —Greenbelt, MD
- Computer Science
- Bachelor of Science
- Bachelor's degree
- Paid holidays
- Disability insurance
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Software Developer (C# / .NET - Logistics & Industrial Systems)
x2 solutions LLC —Herndon, VA
- $75,000 - $95,000 a year
- Full-time
- Hybrid work
- Computer Science
- Engineering
- System design
- Health insurance
- Dental insurance
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Backend Software Engineer - AI Trainer
DataAnnotation —Rosslyn, VA
- $50 - $100 an hour
- Part-time
- Remote
- Writing skills
- English
- Mid-level
- Flexible schedule
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Senior .NET Software Engineer
Network Designs Inc. —Alexandria, VA
- $125,000 - $135,000 a year
- Full-time
- Computer science
- Computer Science
- Bachelor of Science
- Paid holidays
- Disability insurance
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5d
Software Engineer - AI Trainer
DataAnnotation —Falls Church, VA
- $50 - $100 an hour
- Part-time
- Remote
- Writing skills
- English
- Mid-level
- Flexible schedule
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Senior .NET Developer
Prime Source Technologies —Vienna, VA
- $140,000 - $175,000 a year
- Full-time
- Computer Science
- Office
- SQL
- Health savings account
- Health insurance
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C# .NET Backend Developer - W2 Contract
Fortira Inc —Bethesda, MD
- $56.47 - $58.63 an hour
- Contract
- Background check
- Mid-level
- Office
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10d
Jr. Net, C#, SQL Developer - Active Top Secret required
General Dynamics Information Technology —Washington, DC
- $81,349 - $92,000 a year
- Computer Science
- Research
- Mid-level
- Paid holidays
- 401(k) matching
.NET Mainframe Developer
System One —Vienna, VA
- Contract
- Remote
- Computer Science
- 5 years
- Java
- Health insurance
- Dental insurance
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C# / .Net Developer
Synergy ECP —Washington, DC
- $125,000 - $155,000 a year
- Full-time
- Azure
- 3 years
- SQL
- Paid holidays
- Health insurance
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Full Stack Developer with C# Expertise
CACI —Tysons, VA
- $103,800 - $218,100 a year
- Full-time
- Computer science
- 7 years
- Computer Science
- Health insurance
.NET Developer
Gridiron IT Solutions LLC —Chantilly, VA
- $160,000 - $180,000 a year
- Full-time
- 7 years
- Computer Science
- Research
- Health savings account
- AD&D insurance
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Senior Software Developer
Highlight Technologies —Washington, DC
- Email
- Computer science
- Computer Science
- SQL
- Employee stock ownership plan
Software Engineer
National Security Agency —Fort Meade, MD
- $105,262 - $192,764 a year
- 8 hour shift
- Doctoral degree
- Computer Science
- No experience needed
3d
Real-Time Software Engineer
Leidos —Arlington, VA
- $87,100 - $180,000 a year
- Full-time
- Computer science
- Computer Science
- System design
- Paid holidays
- Paid time off
Software Developer
CGI Group, Inc. —Arlington, VA
- $89,600 - $176,300 a year
- Azure
- Mid-level
- AWS
- Paid jury duty
- Paid parental leave
Application Developer
CGI Group, Inc. —Washington, DC
- $69,700 - $169,700 a year
- Oracle
- Computer Science
- ERP systems
- Paid parental leave
- Paid holidays
Portal Developer, Senior
CGI Group, Inc. —Arlington, VA
- $100,000 - $200,000 a year
- 5 years
- Analysis skills
- Bachelor's degree
- Paid parental leave
- Paid holidays
SAP Fiori UX Consultant/Developer (Jr.) - U.S. Citizenship Required
CGI Group, Inc. —Fairfax, VA
- $70,800 - $172,400 a year
- Hybrid work
- Background check
- Writing skills
- Mid-level
- Paid parental leave
- Paid holidays
Mid SW Developer
CGI Group, Inc. —Fairfax, VA
- $70,800 - $156,700 a year
- Computer Science
- System design
- Research
- Paid parental leave
- Paid holidays

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c#.net developer jobs near arlington, va

AP108 HEASARC Senior Scientific Software Developer

ADNET Systems, Inc. -
Greenbelt, MD

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Job Details

Benefits

Paid holidays
Disability insurance
Health insurance
Dental insurance
Tuition reimbursement
Vision insurance
401(k) matching

Qualifications

Software engineering
Content creation for technical audiences
Bug Tracking (Quality assurance practices)
Continuous Delivery (CD) implementation
Software coding
Git
Bachelor's degree
Issue tracking
Version control systems
Software documentation
Managing projects
Open source contribution
DevOps automation
Technical writing experience within technology
Providing code feedback

Full Job Description

AP108 HEASARC Senior Scientific Software Developer

The High Energy Astrophysics Science Archive (HEASARC) at NASA's Goddard Space Flight Center (GSFC) seeks a senior scientific software developer with significant experience in developing, maintaining, and managing open source software. Experience with developing or maintaining C and C++ code would be a plus. We maintain a large code base of analysis software called HEASoft written over several decades and using multiple languages from a variety of contributors and developers. We need to modernize the development and management practices we use. As we open source parts of this code, we expect contributions also from the community. We are furthermore developing a plan for modernizing the software itself and will need an experienced developer to be involved in the design as well as implementation of this future code base.

Required Qualifications:

Demonstrated experience developing and maintaining large, long-lived code bases in a collaborative or open source environment
Proficiency in at least one systems-level language (C, C++, Fortran) and at least one scripting language (Python, Perl, or shell)
Experience with modern software development practices: version control with git, code review workflows, CI/CD pipelines, and issue tracking
Experience managing open source projects, including contribution workflows, licensing considerations, and community-facing documentation
Ability to work across a multi-language, multi-contributor code base and improve consistency without requiring full rewrites
Strong written communication skills for technical documentation and contributor-facing guidance
Bachelor of Science degree in Physics, Astronomy, Computer Science or a relevant physical science
US Citizenship or Permanent Residency (LPR) required, with US residency for the past 3 consecutive years.
Ability to obtain and maintain a Tier 1 Investigation through NASA.

Desired Qualifications:

Experience modernizing or refactoring legacy scientific software
Familiarity with HEASARC tools or high-energy astrophysics data formats (HEASoft, FTOOLS, XSPEC, FITS)
Experience with software build systems (CMake, Autotools, or similar) across multiple platforms
Background in scientific computing or research software engineering
Experience designing software architecture for long-term maintainability and extensibility
Master of Science degree or higher in Physics, Astronomy, Computer Science or a relevant physical science

Team ADNET brings over 30+ years of experience to information systems and professional services for the federal government. With a history of expertise in software development, computer network design, IT security, mission operations support, and educational outreach, Team ADNET is deeply embedded in the Space and Earth Science at NASA's Goddard Space Flight Center (GSFC) in Greenbelt, MD.

ADNET Systems, Inc. is working with Goddard Space Flight Center to fulfill NASA's vision for space exploration, and working with the Science and Exploration Directorate to fulfill its many missions.

ADNET Systems, Inc. is an employee-centric company, committed to providing premier benefits that support our employees and their families. With affordable medical and dental plans coupled with leading disability and life insurance options, ADNET offers our employees the benefits most sought after by today’s professional candidate. Furthermore, our benefits package features the extras that distinguish us from other small businesses, ensuring our high employee retention that our customers appreciate.

Some features of our compensation plans and environment perks include:

Annual Leave/Sick Leave
Military and Family Emergency Leave
Paid Holidays
Performance Bonuses
Medical, Dental and Vision Plans
Direct Deposit Payroll
401K Plan with Company Matching
Tuition Reimbursement
Swag bags

Quick Apply

Refine Your Search

c#.net developer jobs in arlington, va

AP108 HEASARC Senior Scientific Software Developer

Software Developer (C# / .NET - Logistics & Industrial Systems)

Backend Software Engineer - AI Trainer

Senior .NET Software Engineer

Software Engineer - AI Trainer

Senior .NET Developer

C# .NET Backend Developer - W2 Contract

Jr. Net, C#, SQL Developer - Active Top Secret required

.NET Mainframe Developer

C# / .Net Developer

Full Stack Developer with C# Expertise

.NET Developer

Senior Software Developer

Software Engineer

Real-Time Software Engineer

Software Developer

Application Developer

Portal Developer, Senior

SAP Fiori UX Consultant/Developer (Jr.) - U.S. Citizenship Required

Mid SW Developer

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