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Junior Mern Stack Developer Jobs in Reston, VA (NOW HIRING)

Halvik

Sr. Full Stack Developer

Vienna, VA · Remote

$145K - $155K/yr

Position Overview Senior Full Stack Developer responsible for leading the design, development, and ... Coach junior and mid-level developers, participate in code reviews, and help build team capability ...

New

Halvik

Sr. Full Stack Developer

Vienna, VA · On-site

$145K - $155K/yr

Position Overview Senior Full Stack Developer responsible for leading the design, development, and ... Coach junior and mid-level developers, participate in code reviews, and help build team capability ...

New

C. Mack Solutions, LLC

Full Stack Developer

Ashburn, VA · On-site

C. Mack Solutions is seeking a Full Stack Developer with agile methodology experience to join our ... Providing mentoring to junior members of the team Requirements: You must live within the DC, MD, VA ...

SteerBridge

Senior Software Engineer

Vienna, VA · On-site

$145K - $175K/yr

Proficiency in the PERN/MERN Stack (PostgreSQL, MongoDB, Express.js, React.js, Node.js). * Solid ... Ability to guide junior team members in developing clean, maintainable, and declarative code.

SteerBridge

Senior Software Engineer

Vienna, VA · On-site

$123K - $162K/yr

Proficiency in the PERN/MERN Stack (PostgreSQL, MongoDB, Express.js, React.js, Node.js). * Solid ... Ability to guide junior team members in developing clean, maintainable, and declarative code.

Adtech

Senior Full Stack Developer (Java)

Ashburn, VA · On-site

$53.75 - $69.25/hr

Senior Full Stack Developer Duration: Full time Lactation: Ashburn, VA (Hybrid with 2 days a week ... Mentor junior developers and actively contribute to the development of a community of practice ...

Steampunk

Full Stack Developer

Mclean, VA · Remote

$85K - $170K/yr

As a Full Stack Developer , you will work with our growing DevSecOps practice delivering software ... Act as an individual contributor and mentor more junior team members * Engineer and implement ...

Beth Page tech

Java Full Stack Developer

Washington, DC · On-site

$59.50 - $76.75/hr

Java Full Stack Developer Location : Washington, DC (Remote) Duration : Fulltime : This role ... Ability to mentor more junior developers by bringing experience and depth to the design and ...

Steampunk

Full Stack Developer

Mclean, VA · On-site

$85K - $170K/yr

Overview As a Full Stack Developer , you will work with our growing DevSecOps practice delivering ... Act as an individual contributor and mentor more junior team members * Engineer and implement ...

Steampunk

Full Stack Developer

Mclean, VA · Remote

$85K - $170K/yr

Overview As a Full Stack Developer , you will work with our growing DevSecOps practice delivering ... Act as an individual contributor and mentor more junior team members * Engineer and implement ...

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Junior Mern Stack Developer information

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$25K

$92.6K

$143K

How much do junior mern stack developer jobs pay per year?

As of Jul 8, 2026, the average yearly pay for junior mern stack developer in Reston, VA is $92,566.00, according to ZipRecruiter salary data. Most workers in this role earn between $69,700.00 and $90,500.00 per year, depending on experience, location, and employer.

Can I learn MERN in 3 months?

As a Junior MERN Stack Developer, learning the core technologies—MongoDB, Express.js, React, and Node.js—can be achieved in three months with intensive study and practical projects. However, mastering advanced concepts and building a strong portfolio typically requires ongoing practice beyond this timeframe.

Will AI replace MERN?

AI is unlikely to fully replace MERN stack developers, as the role requires understanding complex application logic, coding, and problem-solving that AI tools can assist but not fully automate. Developers skilled in JavaScript, React, Node.js, and MongoDB will continue to be essential for building and maintaining web applications, especially as AI can enhance productivity and automate routine tasks. Staying updated with new tools and frameworks is important for MERN developers to remain competitive in the evolving tech landscape.

What are the key skills and qualifications needed to thrive in the Junior Mern Stack Developer position, and why are they important?

To thrive as a Junior MERN Stack Developer, you need a solid understanding of JavaScript, React.js, Node.js, Express, and MongoDB, typically supported by a relevant degree or coding bootcamp. Familiarity with version control systems like Git, Agile development practices, and basic knowledge of RESTful APIs are highly valued, while certifications in web development can enhance your candidacy. Strong problem-solving abilities, good communication skills, and a willingness to learn enable effective collaboration and growth in this role. These skills and qualities are essential for building efficient web applications and contributing successfully to dynamic development teams.

What kind of projects or tasks might a Junior MERN Stack Developer typically work on?

As a Junior MERN Stack Developer, you will often be involved in building and maintaining web applications, implementing new features, and fixing bugs within the application stack. Your day-to-day work may include writing code for both front-end (using React.js) and back-end (using Node.js and Express), working with databases like MongoDB, and collaborating closely with other developers, designers, and project managers. You may also be asked to participate in code reviews, contribute to team discussions on architecture or user experience, and learn best practices for scalable and maintainable code. This hands-on experience helps you develop your technical skills and prepares you for more advanced responsibilities as your career progresses.

Is MERN stack still in demand?

The MERN stack remains in high demand for web development roles, including Junior MERN Stack Developers, due to its popularity for building scalable and efficient applications. Skills in MongoDB, Express.js, React, and Node.js are highly valued by employers, and knowledge of JavaScript across the stack is essential for many tech companies.

Is MERN stack in demand in 2026?

The MERN stack, which includes MongoDB, Express.js, React, and Node.js, remains highly in demand for junior MERN Stack developers due to its popularity in web development and the growing need for full-stack skills. Proficiency in JavaScript and frameworks like React and Node.js are valuable for job opportunities in 2026.

What is a Junior Mern Stack Developer job?

A Junior MERN Stack Developer is an entry-level software developer who specializes in building web applications using the MERN stack, which consists of MongoDB, Express.js, React, and Node.js. They assist in developing, testing, and maintaining both front-end and back-end components of web applications. Typical responsibilities include writing clean code, fixing bugs, collaborating with senior developers, and integrating APIs. Strong foundational knowledge of JavaScript, database management, and version control (e.g., Git) is essential. This role is ideal for individuals looking to gain hands-on experience and grow their skills in full-stack development.

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Junior Mern Stack Developer jobs near you
Senior Full Stack Developer

Senior Full Stack Developer

Karsun Solutions, LLC

Herndon, VA • On-site

$135K - $150K/yr

Full-time

Re-posted 13 days ago

Job description

Why Karsun?
Join Karsun Solutions to grow your career with the company transforming possible for the US Government.
At Karsun, collaboration drives our community. We're committed to building an environment where team members from diverse backgrounds can innovate, learn and grow with us. Here at Karsun, the only limit to your potential is the limit of your curiosity.
Join Team Karsun, and Find Your Next!
Summary
As a key member of a team that has standardized its AI SDLC practices , the Senior Full Stack Developer will drive the entire software development lifecycle of assigned software components. This includes requirements gathering, development, testing, and deployment, all within a SAFe Agile framework. A core responsibility will be expertly leveraging AI-powered development tools, such as GitHub Copilot, to significantly enhance productivity, accelerate code generation, and elevate code quality across all phases of development. The Senior Full Stack Developer will play a pivotal role in building and maintaining high-performance, seamlessly integrated applications that support our core mission, while also championing the effective adoption of AI best practices and fostering continuous innovation and learning within the team.
What You'll Be Doing:
  • Application Development & AI Integration: Develop, test, and deploy full-stack applications, including dashboards, process automation tools, and interface applications, using Java, JEE, Spring/Spring Boot, Angular, and other relevant technologies. Actively utilize AI-powered coding assistants (like GitHub Copilot) to rapidly prototype features, generate boilerplate code, write unit and integration tests, and assist in refactoring efforts across the full stack.
  • Full Development Lifecycle Ownership: Hands-on role with extensive involvement in the full development lifecycle, including design, development, unit testing, implementation, maintenance, and enhancement of applications.
  • AI Best Practices & Mentorship: As a senior member, champion the effective and responsible adoption of AI development tools across the team, fostering a culture of continuous learning and innovation in AI-assisted development. Mentor junior and mid-level developers on best practices for leveraging AI coding assistants.
  • Prompt Engineering Expertise: Employ advanced prompt engineering strategies to maximize the efficiency and accuracy of AI-generated code, reducing development cycles and time-to-market.
  • Microservices Architecture: Design, develop, and maintain API microservices that are scalable, resilient, and secure.
  • Collaboration: Collaborate effectively with other developers, testers, and stakeholders within a SAFe Agile environment.
  • Modernization: Drive the migration of monolith applications to the latest microservices architecture.

Required Qualifications:
  • Bachelor's degree in Computer Science or a related field.
  • 8-10 years of experience in full-stack development using Java/JEE.
  • Strong proficiency in Java, JEE, and related technologies, including Spring/Spring Boot and Angular frameworks.
  • Demonstrated expertise and hands-on experience utilizing AI-powered coding assistants (e.g., GitHub Copilot) in daily development workflows to significantly enhance productivity, accelerate code generation, and improve code quality across both front-end and back-end development.
  • Expert understanding and practical application of prompt engineering techniques and AI Prompt Templates for optimizing AI code suggestions and effectively guiding AI tools to produce desired, secure, and efficient outcomes for complex tasks.
  • Hands-on experience with Docker, Apache Maven, JBoss Enterprise Application Platforms, and cloud-native application hosting.
  • Expert Proficiency and hands-on experience with UI frameworks such as Angular, Bootstrap, jQuery, and DataTables.
  • Experience with Java Persistence API (JPA) and Hibernate ORMs.
  • Availability during core business hours of 9:00 AM - 5:00 PM EST.
  • Ability to obtain and maintain a Public Trust clearance.

Preferred Qualifications:
  • Experience integrating AI development tools into existing IDEs (e.g., VS Code, IntelliJ) and contributing to the automation of development tasks through AI assistance.
  • Experience supporting US federal government contracts.
  • Experience with workflow orchestration tools such as Temporal, Camunda is a plus.
  • Experience with integrating USWDS compliant components with Angular storybooks is a plus.

Things to Know:
Commitment to Non-Discrimination
All qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, local, or international law.
Salary Range
The proposed salary range for this role is $135,000 to $150,000 USD. The salary range provided is a good faith estimate representative of all experience levels. Karsun considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate's work experience, location, education/training, and key skills.
Third Party Resumes: Karsun does not accept unsolicited resumes through or from search firms or staffing agencies. All unsolicited resumes will be considered the property of Karsun and Karsun will not be obligated to pay a placement fee.
Clearance Information
This position requires the eligibility to obtain a security clearance. The Defense Industrial Security Clearance Office (DISCO), an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the US Department of State government website: https://www.state.gov/m/ds/clearances/c10978.htm
Location
To be considered for this role, you must reside in one of the following states: CA, CO, DC, FL, GA, IL, MD, NJ, NY, NC, OH, OK, PA, SC, TX, VA, WV.
Applicants must be authorized to work in the U.S. We may consider candidates currently in H-1B status who are eligible for transfer.

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