Front-End Software Engineer

Haystack
Washington, District of Columbia, United StatesFull-timePosted Sep 18, 2026

About the role

We're working with a leading technology solutions provider dedicated to supporting critical national security initiatives. This organization leverages cutting-edge technology to deliver secure, high-performance systems for defense and intelligence clients, operating at the forefront of innovation in a highly impactful domain.

The Role

Develop and maintain high-quality web applications for a DoD program using modern front-end frameworks.

Code, test, and debug new and existing web applications to ensure robust performance.

Implement and refine user interfaces for optimal user experience.

Conduct thorough unit testing utilizing automated tooling to maintain code integrity.

Collaborate with internal and external teams to ensure optimal application performance and usability.

Participate in peer code reviews and utilize virtualization technologies like Docker and Podman.

What You'll Need

Active Top Secret clearance with the ability to obtain a TS/SCI with CI Polygraph.

Bachelor's degree and a minimum of ten years of professional experience in software development.

Strong proficiency in modern front-end libraries such as ReactJS and Angular, with at least 2 years of direct experience.

Expertise in HTML, CSS, and JavaScript, along with a solid understanding of HTTP web requests for JSON data.

Demonstrated ability to work effectively within an Agile framework and strong communication skills.

Experience writing front-end unit tests and familiarity with performance optimization techniques are a plus.

A genuine passion for creating exceptional user experiences and up-to-date knowledge of emerging front-end technologies.

What's On Offer

Comprehensive benefits package including 100% company-paid medical, dental, and vision premiums for employees and dependents.

Robust retirement plan with an 8% total company contribution (4% match + 4% non-elective), with immediate vesting.

Generous paid time off, including up to 20 days of flexible PTO and 11 paid floating holidays.

Opportunities for performance bonuses and employee referral bonuses.

Apply via Haystack today!

Responsibilities

  • Develop and maintain high-quality web applications for a DoD program using modern front-end frameworks
  • Code, test, and debug new and existing web applications to ensure robust performance
  • Implement and refine user interfaces for optimal user experience
  • Conduct thorough unit testing utilizing automated tooling to maintain code integrity
  • Collaborate with internal and external teams to ensure optimal application performance and usability
  • Participate in peer code reviews and utilize virtualization technologies like Docker and Podman

Qualifications

  • Active Top Secret clearance with the ability to obtain a TS/SCI with CI Polygraph
  • Bachelor's degree and a minimum of ten years of professional experience in software development
  • Strong proficiency in modern front-end libraries such as ReactJS and Angular, with at least 2 years of direct experience
  • Expertise in HTML, CSS, and JavaScript, along with a solid understanding of HTTP web requests for JSON data
  • Demonstrated ability to work effectively within an Agile framework and strong communication skills
  • Experience writing front-end unit tests and familiarity with performance optimization techniques are a plus

Benefits

  • Comprehensive benefits package including 100% company-paid medical, dental, and vision premiums for employees and dependents
  • Robust retirement plan with an 8% total company contribution (4% match + 4% non-elective), with immediate vesting
  • Generous paid time off, including up to 20 days of flexible PTO and 11 paid floating holidays
  • Opportunities for performance bonuses and employee referral bonuses

Skills mentioned

Frontend DevelopmentReactAngularHTMLCSSJavaScriptREST APIsUnit TestingPerformance OptimizationDocker

About Haystack

Haystack combines AI & expert vetting to deliver world-class tech candidates who are engaged, aligned, and ready to interview. We're trusted by over 400,000+ tech candidates, working in Software Engineering, Data, Design, DevOps, Cloud, Tech Management, Testing, Product & Delivery, Architecture and more. 100s of employers from startups and scale-ups like Atom Bank, DuckDuckGo and Goodlord to established enterprises like American Express, Dunelm and AWS use Haystack to connect with qualified tech talent that they can't find anywhere else.

Technology51-200 employeesNewcastle upon Tyne, England