Java Software Engineer jobs in Gaithersburg

Why Karsun? Join Karsun Solutions to grow your career with the company transforming possible for the US Government. At Karsun, collaboration drives our community. We’re committed to building an environment where team members from diverse backgrounds can innovate, learn and grow with us. Here at Kars

CaseGuard

$10,000 - $17,167 /year

We are looking for a Senior Software Engineer to join our backend team and play a critical role in building the platform that will define CaseGuard's next chapter. You will design and build the REST API microservices and cloud infrastructure that power our application, real-time collaboration featur

Securiport

Job Summary: Securiport is hiring a Software Engineer (3–5 years experience) to build scalable, high-impact systems supporting global border security and threat detection. In this role, you’ll develop C#/.NET backend services, APIs, and microservices that power real-time data processing and analytic

Securiport

Job Summary: Securiport is hiring a Software Engineer (3–5 years experience) to build scalable, high-impact systems supporting global border security and threat detection. In this role, you’ll develop C#/.NET backend services, APIs, and microservices that power real-time data processing and analytic

Securiport

Job Summary: Securiport LLC is a U.S.-based company headquartered in Reston, VA, specializing in the design and implementation of advanced border security solutions, including passenger biometric recognition, immigration processing, and intelligent information management systems. Our technology enab

Securiport

Job Summary: Securiport is hiring a Software Engineer (3–5 years experience) to build scalable, high-impact systems supporting global border security and threat detection. In this role, you’ll develop C#/.NET backend services, APIs, and microservices that power real-time data processing and analytic

ASRC Federal is a leading government contractor furthering missions in space, public health and defense. As an Alaska Native owned corporation, our work helps secure an enduring future for our shareholders. Join our team and discover why we are a top veteran employer and Certified Great Place to Wor

An active or rein-statable TS/SCI with Polygraph security clearance is REQUIRED. Please do not apply if you currently do not possess this level of clearance. Are you a Software Engineer who is ready for a new challenge that will launch your career to the next level? Tired of being treated like a com

Overview VTG is seeking a Staff I Software Engineer with specific skills to optimize our Python-based software for modeling sonar array performance and other tactical use cases. The primary focus of this role is to assist in implementing parallel processing and GPU acceleration. This position will s

Overview VTG is seeking a Senior Associate Software Engineer with specific skills to optimize our Python-based software for modeling sonar array performance and other tactical use cases. The primary focus of this role is to assist in implementing parallel processing and GPU acceleration. This positi

Lockheed Martin

Job Description: This position may be eligible for a $25K sign on bonus for external hires! WHAT WE’RE DOING Lockheed Martin, Rotary Mission Systems Cyber & Intelligence invites you to step up to one of today’s most daunting challenges: the use of advanced electronics to undermine our way of life. A

Labor Category: Software Engineer Position Title: UI/UX Designer Position Level: Level 1 – Subject Matter Expert Salary: Up to $215,000.00 per year Core Hours: 9am to 4pm Location: McLean VA Description Position Requires a Top Secret (TS/SCI) Clearance with a Polygraph. UI/UX Designer – 01 June 2026

Job ID: 2611428 Location: Arlington, VA, US Date Posted: 2026-04-14 Category: Software Subcategory: SW Systems Engr Schedule: Full-Time Shift: Day Job Travel: Yes - 25% of the time Minimum Clearance Required: Secret Clearance Level Must Be Able to Obtain: TS/SCI Potential for Remote Work: ORA_HYBRID

Job Number: R0237703 NET Software Engineer The Opportunity: As a full-stack developer, you can resolve a problem with a complete end-to-end solution in a fast, agile environment. If you’re looking for the chance to not just develop software, but to create a system that will make a difference, we nee

Here at Appian, our values of Intensity and Excellence define who we are. We set high standards and live up to them, ensuring that everything we do is done with care and quality. We approach every challenge with ambition and commitment, holding ourselves and each other accountable to achieve the bes

Do you love building and pioneering in the technology space? Do you enjoy solving complex business problems in a fast-paced, collaborative, inclusive, and iterative delivery environment? At Capital One, you'll be part of a big group of makers, breakers, doers and disruptors, who love to solve real p

Do you love building and pioneering in the technology space? Do you enjoy solving complex business problems in a fast-paced, collaborative, inclusive, and iterative delivery environment? At Capital One, you'll be part of a big group of makers, breakers, doers and disruptors, who solve real problems

ELEVI Associates

$165,400 - $190,000 /year

Because You Deserve More Than Just a Job To be an ELEVI team player you will need: You must hold a current Poly clearance Twelve (12) years experience software engineering experience in programs and contracts of similar scope, type, and complexity is required Four ((4)years of which must be in progr

Lockheed Martin

Job Description: This position may be eligible for a $25K sign on bonus for external hires! Lockheed Martin, Cyber & Intelligence invites you to step up to one of today’s most daunting challenges: the use of advanced electronics to undermine our way of life. As a cyber security professional at Lockh

Lockheed Martin

Job Description: This position may be eligible for a $25K sign on bonus for external hires! WHAT WE’RE DOING Lockheed Martin, Rotary Mission Systems Cyber & Intelligence invites you to step up to one of today’s most daunting challenges: the use of advanced electronics to undermine our way of life. A