Application Developer

ManTech; Chantilly (NC); On-site; USD 115,000 - 190,000; Full time

Benefits offered by this job

Health Insurance

Life Insurance

Paid Time Off

Holiday Pay

Disability Insurance (short-term)

Disability Insurance (long-term)

Retirement and Savings

Learning and Development opportunities

Wellness programs

Job summary

MANTECH seeks an Application Developer in Chantilly, VA for full-time, on-site work. The role focuses on developing and enhancing existing applications and new features, with strong Java, web technologies, and Spring/REST skills. A TS/SCI w/ Poly clearance is required, and a robust benefits package accompanies the role.

The team emphasizes collaboration with internal and external stakeholders and adherence to DevOps practices for deployment across development, test, and production environments.

Qualifications

• High School Diploma/GED with 7+ years of experience in information technology.
• Strong Java programming/development skills with hands-on experience.
• Experience with HTML, CSS, JavaScript and at least one modern front-end framework (preferably Angular).
• Experience with Spring Framework, RESTful services and SQL; ORM libraries such as Hibernate/JPA.
• Experience with Git branching and merging within a team.

Responsibilities

• Designing, programming, and modifying software systems, applications, and tools, both existing and potentially new in the future.
• Analyzing user needs and software requirements to determine feasibility within time and cost constraints.
• Collaborating with teammates, service providers, vendors, and users to develop new program features.
• Developing unit and integration tests and participating in functional/regression tests.
• Correcting errors and ensuring the program delivers the desired results; review help desk messages and troubleshoot production issues.
• Participating in code reviews and incorporating feedback according to standards.

Skills

Java

HTML

CSS

JavaScript

Angular

Spring Framework

RESTful services

SQL

Hibernate/JPA

Git

Education

High School Diploma/GED

Job description

General information

Requisition #

R70756

Locations

USA-VA-Chantilly

Posting Date

09/15/2026

Security Clearance Required

TS/SCI w/ Poly

Remote Type

Onsite

Time Type

Full time

Description & Requirements

Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we’ve been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with MANTECH!

MANTECH seeks a motivated, career and customer-oriented Application Developer to join our team in Chantilly, VA

The Application Developer will be dedicated full-time to development and enhancement support for existing applications as well as new development.

Responsibilities include but are not limited to:

• Designing, programming/developing, and modifying software systems, applications, and tools, both existing and potentially new in the future
• Analyzing user needs and software requirements to determine feasibility of design within time and cost constraints
• Collaborating with teammates, other service providers, vendors, and users to develop new program features
• Developing unit and integration tests, in addition to participating in functional and regression tests to ensure programs will produce the desired results and that instructions are correct
• Correcting errors by making the appropriate changes and then re-checking the program to ensure the desired result was produced. As well as, reviewing help desk messages periodically and working with other teams to troubleshoot and resolve production issues
• Participating in code reviews by reviewing and incorporating feedback from teammates as well as providing feedback to others based on existing standards and recommended programming practices.
• Deploying code to development, test, and production environments using existing DevOps infrastructure/tools
  

Minimum Qualifications

• High School Diploma/GED with 7+ years of experience in the Information Technology field
• Strong Java programming/development skills, with hands‑on experience
• Experience with HTML, CSS, JavaScript, and at least one modern front‑end framework, preferably Angular
• Experience with, or knowledge of, the Spring Framework and RESTful services and SQL, ORM libraries such as Hibernate/JPA
• Experience with Git branching and merging within a team to manage source code
  

Preferred Qualifications

• Strong ability to manage competing priorities and communication to multiple stakeholders
• Experience with, or knowledge of, Elasticsearch
• Experience with, or knowledge of, best practices for developing secure web applications
  

Clearance Requirements

• An active TS/SCI with Polygraph
  

Physical Requirements

• Use hands to operate a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.
• The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
• Must be able to remain in a stationary position 50% of the time

The projected compensation range for this position is $114,600.00-$190,200.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH’s benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short‑term and long‑term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.

MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation. If you need a reasonable accommodation to apply for a position with MANTECH, please email us at [e-mail] and provide your name and contact information.