ManTech is seeking a motivated, mission- oriented Senior Principal Software Engineer in the Chantilly, VA area to provide unparalleled support to our customer.

The Senior Principal Software Engineer will be a key member of our development team. This team develops web-based systems that support our customer’s acquisition office. The successful candidate must be an enthusiastic and passionate engineering professional, have expertise in a variety of development languages, and be able to work independently and as part of a team.

Provides application software development services or technical support typically in a defined project Develops program logic for new applications or analyzes and modifies logic in existing applications Codes, tests, debugs, documents, implements and maintains software applications Analyzes requirements, and maintains, tests and integrates application components Ensures that system improvements are successfully implemented

Requires specialized depth and/or breadth of expertise Interprets internal or external business issues and recommends best practices. Solves complex problems; takes a broad perspective to identify innovative solutions. Works independently, with guidance in only the most complex situations. May lead functional teams or projects. Requires depth and/or breadth of expertise in own specialized area and general knowledge of related areas Interprets internal/external business challenges and recommends best practices to improve products, processes, or services. May lead teams or projects with moderate resource requirements, risk, and/or complexity. Leads others to solve complex problems; uses analytical thinking, tools, and judgement to identify innovative solutions Impacts the achievement of customer, operational, project or service objectives; work is guided by department objectives. Communicates complex concepts; anticipates potential objections and influences others to adopt a different point of view.

Responsibilities include, but are not limited to:

• Write stable, extensible, and maintainable code

• Integrate with third-party APIs and internal utilities

• Maintain and add to a suite of automated test

• Participate in code reviews

• Participate in the projects agile process

Basic Qualifications:

• Requires Bachelor's degree or equivalent experience

• At least 8+ years of relevant experience

• Experience contributing to a large software project

• Ability to design features for and maintain long standing software systems with a small team of developers

• Strong knowledge of Microsoft .NET

• Experience with JQuery, C#, CSS

• Quick learner, both able and willing to learn new technology and software

• Ability to work with minimum supervision, while collaborating with team members regularly

• A passion and desire to produce elegant code

Preferred Qualifications:

• Exposure to front-end technologies and how they fit into the larger software design

• Understanding of REST APIs

• Exposure to databases and SQL

• Experience with continuous integration and deployment

• Experience with Amazon Web Services and/or other cloud service providers

Security Clearance Requirements:

• Current TS/SCI clearance with Polygraph

Physical Requirements:

• Must be able to be in a stationary position more than 50% of the time

• Must be able to communicate, converse, and exchange information with peers and senior personnel

• Constantly operates a computer and other office productivity machinery, such as a computer

• Constantly positions self to maintain computers in the lab, including under the desks and in the server closet

• Frequently moves Audio/Visual or Computer equipment weighing up to 50 pounds across and/or around a business campus or large facility

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. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at careers@mantech.com and provide your name and contact information.