ManTech Software Developer, Senior in Chantilly, Virginia

Job Duties and Responsibilities:

Become an integral part of a diverse team that leads the world in Mission Solution & Services. At ManTech International Corporation, you will help protect our national security while working on innovative projects that offer opportunities for advancement.

As a Senior Software Developer, you will perform as a technical expert in the design, development, coding, testing, and debugging of new software or complex enhancements to existing software.

The ideal candidate will work with other technical staff to understand and develop resolution for software problems, perform code reviews, as well as manage customer complaints and respond to suggestions for software modifications or enhancements. The candidate should have the ability to be the technical lead on complex projects.

Responsibilities include:

  • Experience working with HTML 5 & CSS

  • Experience with Windows desktop and web application development using C#

  • Experience working with JavaScript and PHP

  • Experience working with Responsive and Interactive Design (UI/UX)

  • Experience gathering requirements from customers and translating those requirements into technical implementations.

  • Basic knowledge of setting up and maintaining active directory for development environments.

  • Knowledge of prototyping/wireframing tools (Adobe XD, Justinmind)

  • Knowledge of CSS toolkits (such as Bootstrap)

  • Knowledge of CSS preprocessor toolsets (such as Sass, LESS, or Stylus)

  • Knowledge of jQuery, AngularJS

  • Knowledge working with JavaScript code optimization

Position Requirements:

  • At least 5-7 yrs. of software development experience with a Bachelor s degree or equivalent experience.

  • Experience with C#/, User Interface Design, Windows desktop application development

  • Security Requirements: U.S. Citizenship and an active Secret clearance required


Requires Bachelor s degree (in Computer Science or related field) or equivalent and five to seven years of related experience.


Equivalent Experience/Education, Bachelor's Degree

Years of Experience

05-07 years w/Bachelors Degree, 02-04 years w/Masters Degree

Position Type





ManTech International Corporation is comprised of approximately 7,300 talented employees who use advanced technology to help government and industry meet some of their greatest challenges around the world. We adhere to the simple, no-nonsense values on which ManTech was founded more than four decades ago, aligning squarely with the mission objectives of our customers. As our customer base continues to expand and diversify, we continue to diversify our workforce and solutions. Nearly half our employees have a military background, and approximately 70 percent hold a government security clearance. As a leading provider of innovative technology services and solutions for the nation's defense, security, health, space, and intelligence communities; we hold nearly 1,100 active contracts with more than 50 different government agencies.

ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Waretime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law. If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services.

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