Demo

Front End Developer (mid-level)

Astor & Sanders
Mc Lean, VA Remote Full Time
POSTED ON 4/30/2026
AVAILABLE BEFORE 6/30/2026

Front End Developer (Mid-Level)

Systems Integration & Development (SID), an award-winning IT solutions provider based in McLean, VA, is seeking a skilled Mid-Level Front End Developer to join our team. This is a full-time and remote position.

Roles & Responsibilities

  • Develop, maintain, and enhance responsive web applications and user interfaces that provide an excellent user experience.
  • Collaborate with designers, back-end developers, and product managers to translate requirements into functional and visually appealing websites and applications.
  • Write clean, reusable, and efficient code using front-end technologies such as HTML5, CSS3, JavaScript, and modern frameworks like React or Angular.
  • Perform cross-browser and cross-device testing to ensure compatibility and responsiveness.
  • Optimize applications for maximum speed and scalability.
  • Participate in code reviews, contribute to best practices, and suggest improvements to processes and applications.
  • Troubleshoot and debug issues, providing timely fixes and enhancements.
  • Stay up-to-date with emerging front-end technologies, trends, and industry best practices.
  • Contribute to documentation and knowledge sharing within the development team.
  • Additional duties as assigned.

Skills & Experience

  • Bachelor’s degree in Computer Science, Information Technology, Systems Engineering, or related field.
  • Minimum 4 years of experience in applications development, cloud-based applications, or related roles.
  • Front End development experience with Vue 3, Pinia, PrimeVue, and Knex
  • Back End development experience .NET Web Api
  • Postgres database experience
  • Hands-on experience with cloud platforms such as AWS or others.
  • Strong understanding of data visualization, statistical processing and display, and cloud-based application processing.
  • Experience with application development, testing, and validation methodologies.
  • Ability to analyze system performance and troubleshoot complex issues.
  • Familiarity with DevOps practices, CI/CD pipelines, and Infrastructure-as-Code (IaC) tools (e.g., Terraform or others).
  • Knowledge of monitoring and logging tools (e.g., CloudWatch or others).
  • Deep understanding of modern application development design concepts, cybersecurity principles, and cloud application architecture.
  • Experience working on federal government systems, either as a contractor or federal employee, with a recent PUBLIC TRUST or higher clearance, is very strongly preferred.
  • Additional duties as assigned

Systems Integration & Development (SID) offers a unique, stimulating and challenging environment that fosters individual growth and rewards performance. Systems Integration & Development (SID) is an Equal Opportunity Employer.  

Some of our competitive benefits include

  • Generous Paid Time Off (PTO) and all Federal Holidays off
  • Comprehensive Health Coverage
  • Retirement Savings Plan
  • Pre-Tax Benefit Programs
  • Wellness and Work-Life Support
  • Professional Development
  • Performance and Referral Bonuses
  • Life and Disability Insurance

Salary.com Estimation for Front End Developer (mid-level) in Mc Lean, VA
$124,908 to $150,858
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