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Software Developer I Jobs in Washington (NOW HIRING)

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Software Engineer I

Annapolis Junction, MD · On-site

Software Developer I Location: Annapolis Junction, MD Required Clearance : TS/SCI w/ Full-Scope Poly Salary: Competitive We are seeking a talented software developer to join our team. This is a ...

Fullscope

Software Engineer I

Annapolis Junction, MD

Software Developer I Location: Annapolis Junction, MD Required Clearance: TS/SCI w/ Full-Scope Poly Salary: Competitive We are seeking a talented software developer to join our team. This is a unique ...

VTG

Software Developer

Chantilly, VA · On-site

Overview VTG is seeking a Software Developer for a technical development program supporting the ... I.e., continuous integration and continuous delivery/deployment. • Write custom scripts to ...

VTG

Software Developer

Chantilly, VA · On-site

The Software Engineer will work with a small team of developers, software engineers, and data ... repeatable fashion, I.e., continuous integration and continuous delivery/deployment. • ...

Leidos

Software Developer

Chantilly, VA

$154K - $278K/yr

The Software Engineer will work with a small team of developers, software engineers, and data ... Establish and maintain infrastructure in a repeatable fashion, I.e., continuous integration and ...

Leidos

Software Developer

Chantilly, VA · On-site

$154K - $278K/yr

The Software Engineer will work with a small team of developers, software engineers, and data ... Establish and maintain infrastructure in a repeatable fashion, I.e., continuous integration and ...

NS2 Mission

Software Developer

Chantilly, VA · On-site

... SDA I&W systems. We are looking for a Software Developer with strong Java expertise and a ... background in astrodynamics . Candidates may participate in all aspects of lifecycle application ...

NS2 Mission

Software Developer

Chantilly, VA · On-site

... SDA I&W systems. We are looking for a Software Developer with strong Java expertise and a ... background in astrodynamics . Candidates may participate in all aspects of lifecycle application ...

NewGen

Software Developer

Herndon, VA · On-site

The program is seeking a Full Stack primarily Front End, Software Developer to join its Data ... Automated testing for front end applications (i.e. Jasmine, Selenium, Cypress) * Web-based ...

NewGen Technologies

Software Developer

Herndon, VA · On-site

The program is seeking a Full Stack primarily Front End, Software Developer to join its Data ... Automated testing for front end applications (i.e. Jasmine, Selenium, Cypress) * Web-based ...

DANE LLC

Software Developer

Chantilly, VA · On-site +1

$85K - $100K/yr

Develop and test MuleSoft Anypoint flows (i.e. System/API/ Process layers); configure connectors, transformations, and error handling. * Write unit, integration, and API tests (xUnit/NUnit, JUnit ...

Lentech Inc.

Software Developer

Linthicum Heights, MD · On-site

$140K - $155K/yr

Lentech is hiring a software engineer who loves Pig and PySpark. * The engineer will be heavily ... Lentech's Mission Technical Solutions Division is focused on providing engineering, operations, I&T ...

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Showing results 1-20

All JobsSoftware Developer I JobsSoftware Developer I Jobs in Washington

Software Developer I information

See Washington salary details

$54.4K

$126.7K

$188K

How much do software developer i jobs pay per year?

As of Jun 14, 2026, the average yearly pay for software developer i in Washington is $126,675.00, according to ZipRecruiter salary data. Most workers in this role earn between $101,900.00 and $147,200.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Software Developer I, and why are they important?

To thrive as a Software Developer I, you need a solid understanding of programming languages (such as Java, Python, or C#), problem-solving skills, and typically a bachelor's degree in computer science or a related field. Familiarity with version control systems (like Git), integrated development environments (IDEs), and basic software development methodologies is important. Strong communication, teamwork, and a willingness to learn help you collaborate effectively and adapt to new challenges. These skills ensure you can contribute to successful software projects and grow within dynamic development teams.

What opportunities for mentorship and skill development are typically available to Software Developer I employees?

As a Software Developer I, you can expect to benefit from structured mentorship programs, code reviews, and regular feedback from more experienced developers on your team. Many companies also provide access to online learning platforms, technical workshops, and internal knowledge-sharing sessions. These resources are designed to help you build your technical skills, understand company-specific processes, and grow your professional network, setting you up for advancement to more senior roles.

What is the difference between Software Developer I vs Software Engineer I?

CriteriaSoftware Developer ISoftware Engineer I
Required CredentialsBachelor's in CS or related field; sometimes certificationsBachelor's in CS or related; certifications less common
Work EnvironmentTeam-based, collaborative projects in tech companiesSimilar environment, often in larger organizations or startups
Employer & Industry UsageUsed across tech, finance, healthcare industriesCommonly used interchangeably with Software Developer in many companies
Search & Comparison IntentOften compared with Software Engineer I for entry-level rolesSimilar entry-level role, slight differences in job scope

Both roles are entry-level software positions with similar educational backgrounds and work environments. The main difference lies in terminology preference; 'Software Developer I' emphasizes coding and development tasks, while 'Software Engineer I' may imply a broader engineering perspective. Companies often use these titles interchangeably, so understanding the specific job description is key.

What are Software Developer I positions?

A Software Developer I is an entry-level professional who designs, develops, tests, and maintains software applications under the guidance of senior developers or team leads. They typically work on coding tasks, debugging, and learning best practices in software development. This role often involves collaborating with team members, writing documentation, and participating in code reviews. It's a starting point for individuals building a career in software engineering.
What cities in Washington are hiring for Software Developer I jobs? Cities in Washington with the most Software Developer I job openings:
Software Developer I jobs near you
Infographic showing various Software Developer I job openings in Washington as of June 2026, with employment types broken down into 1% As Needed, 88% Full Time, 8% Part Time, and 3% Contract. Highlights an 76% Physical, 5% Hybrid, and 19% Remote job distribution, with an average salary of $126,675 per year, or $60.9 per hour.
Software Developer I (Junior)

Software Developer I (Junior)

3Si Security Systems

Ashburn, VA • On-site

$68K - $89K/yr

Full-time

Medical, Dental, Vision, Life, Retirement

Posted 15 days ago

Job description

At 3Si, our mission is to make your world, safer. As a global leader in innovative security technology, we help businesses and law enforcement prevent and respond to crime through field-proven solutions and trusted partnerships. With over 100+ years of combined experience through our merged companies, our expertise drives measurable impact in communities worldwide.

We specialize in GPS tracking, video surveillance, and integrated response technologies that deter theft and accelerate criminal apprehension. Designed for retail, financial institutions, law enforcement, and more, our solutions combine cutting-edge tools with unmatched response capabilities. Through our exclusive DirectToDispatch™ technology, verified crime alerts are sent directly to law enforcement dispatch centers in real time—bypassing traditional third-party monitoring delays—to enable rapid, precise response when it matters most.

At 3Si, meaningful work makes a difference. We’re a purpose-driven team that values innovation, trust, and collaboration. From engineering to sales and support, every role contributes to our mission to protect communities and make the world safer. We offer a hybrid, flexible work culture, competitive benefits, and the chance to grow alongside a team of passionate, dedicated professionals.

Join us—and be part of something that matters. The Junior Software Developer is responsible for participating in technical development, testing, debugging, and implementation of enhancements to enterprise-level applications. The developer is expected to work collaboratively with senior developers and members of the team, contributing to the mission-critical success of our organization. Additionally, you may be tasked with writing Jira tickets, technical user guides, and supporting documentation.

Primary Responsibilities

  • Participate in full software development lifecycle activities, including design, development, testing, debugging, and implementation

  • Design and develop scalable software solutions using C# and .NET

  • Collaborate with other developers and cross-functional teams to ensure technical alignment with project goals

  • Utilize development tools such as Visual Studio, Git, Jira, and

  • Work with technologies including REST/ServiceStack, WPF, Progress/Telerik UI Toolkit

  • Support and maintain client and server utilizing REST and HTTPS protocols

  • Perform other duties as needed to support the company’s mission and project requirements

Knowledge, Skills, and Abilities

  • 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

Qualifications

  • Bachelor’s 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

  • 1 year of related software development experience

  • 1 year of hands-on experience in C#/.NET development

  • Experience with reusable C# library development and version-controlled environments

Additional Comments

  • Position on-site in Ashburn, VA.

  • Successful candidates must pass a comprehensive background investigation

  • Pre-employment drug screening is required

  • Comprehensive benefits package including medical, dental, vision, life insurance, short- and long-term disability starting on your first day
  • 401(k) retirement savings plan with company match