654 junior software engineer jobs found

ECS is seeking a Junior Software Engineer Intern to work in our Fairfax, VA office for the summer of 2026. This internship offers a unique opportunity to move beyond the classroom and gain firsthand experience with production-grade workflows and real-world datasets. You will work alongside senior engineers and scientists to move models from research to the tactical edge, ensuring from end to end, both our warfighters & decision makers are empowered with the latest technology solutions at their fingertips. Job Description: ECS is seeking a Junior Software Engineer to participate in a team of scientists and engineers, and to support the execution of a variety of projects including Artificial Intelligence/Machine Learning and Big Data/Cloud Solutions. The candidate works closely with the Project Manager and technical team to swiftly develop solutions in an agile environment and deploy capabilities to the operational end user. The candidate cultivates an environment...

Basic Qualifications Bachelor’s degree in Software Engineering, or a related Science, Engineering or Mathematics field. Agile experience preferred. CLEARANCE REQUIREMENTS: Department of Defense SECRET security clearance is required at time of hire. Applicants selected will be subject to a U.S. Government security investigation and must meet eligibility requirements for access to classified information. Due to the nature of work performed within our facilities, U.S. citizenship is required. Responsibilities for this Position Make the world’s most advanced Cybersecurity and Encryption products even smarter   Imagine building your career by developing the solutions that support the mission of our nation’s service members, intelligence analysts and first responders. That’s the challenge that’s waiting for you at General Dynamics Mission Systems. Here you have the opportunity to redefine innovation and excellence for the world....

Basic Qualifications Bachelor’s degree in Software Engineering, or a related Science, Engineering or Mathematics field. Agile experience preferred. CLEARANCE REQUIREMENTS: Department of Defense SECRET security clearance is required at time of hire. Applicants selected will be subject to a U.S. Government security investigation and must meet eligibility requirements for access to classified information. Due to the nature of work performed within our facilities, U.S. citizenship is required. Responsibilities for this Position Make the world’s most advanced Cybersecurity and Encryption products even smarter   Imagine building your career by developing the solutions that support the mission of our nation’s service members, intelligence analysts and first responders. That’s the challenge that’s waiting for you at General Dynamics Mission Systems. Here you have the opportunity to redefine innovation and excellence for the world....

Basic Qualifications Requires a Bachelor’s degree in Software Engineering, or a related Science, Engineering, Technology or Mathematics field. Also requires 8+ years of job-related experience, or a Master's degree plus 6 years of job-related experience. Agile experience preferred.     CLEARANCE REQUIREMENTS: : Department of Defense Secret security clearance is required at time of hire. Applicants selected will be subject to a U.S. Government security investigation and must meet eligibility requirements for access to classified information. Due to the nature of work performed within our facilities, U.S. citizenship is required. Responsibilities for this Position ROLE AND POSITION OBJECTIVES: We are seeking a highly skilled and experienced Software Engineer with a Mathematics background to join our dynamic team focused on undersea sensor systems. In this role, you will be responsible for designing, developing, and...

Position: Senior Java Software Engineer Job Description: We are looking for a skilled Senior Java Developer to join our team and take ownership of designing, developing, and maintaining robust, scalable Java-based applications. This role requires deep expertise in Java and its related frameworks, strong problem-solving abilities, and a solid understanding of modern development practices. As a Senior Developer, you will lead project initiatives or development teams, collaborate closely with cross-functional groups including QA, DevOps, and UI/UX designers, and provide technical guidance to junior developers. You’ll play a key role in ensuring our applications meet high standards of performance, scalability, and alignment with business goals. Key Responsibilities Design, implement, debug, and deploy Java-based applications across the full SDLC.   Collaborate with cross-functional teams to develop robust, maintainable solutions. Contribute to technical...

Description: WHAT WE'RE DOING By bringing together people that use their passion for purposeful innovation, at Lockheed Martin we keep people safe and solve the world's most complex challenges. Our people are some of the greatest minds in the industry and truly make Lockheed Martin a great place to work. With our employees as our priority, we provide diverse career opportunities designed to propel development and boost agility. Our flexible schedules, competitive pay, and comprehensive benefits enable our employees to live a healthy, fulfilling life at and outside of work. At Lockheed Martin, we place an emphasis on empowering our employees by fostering innovation, integrity, and exemplifying the epitome of corporate responsibility. Your Mission is Ours. THE WORK Lockheed Martin has been embedded with the USSTRATCOM Nuclear Mission for 30+ years and has a track record of bringing innovative mission software solutions to this domain. Lockheed Martin Rotary & Mission...

Overview SCCI is seeking a Senior Software Engineer to join our team in support of a high-performing DoD acquisition program. The successful candidate will provide software engineering technical support, and mentor junior and mid-level software engineers. In this position your work will have a great impact on the program's overall mission in providing support to the Department of Defense. This position is available for immediate hire and is located in Dahlgren, VA . SCCI offers a comprehensive and competitive benefits package including Health, Dental, Vision, Life and Disability benefits, 401k with Company Match, time off consisting of 2 weeks of paid vacation, 48 hours of sick/personal leave, and 11 paid Holidays. Responsibilities: Provide Software Engineering technical support Provide mentorship for Junior - Mid level Software Engineers Support software engineering code-design reviews Perform requirements assessments and requirements...

Description: Who We Are Lockheed Martin is dedicated to shaping, developing, & advancing technologies & capabilities with a focus on our customers' needs as part of our 21st Century Security vision. We foster collaborative innovation, provide opportunities for career development, & empower our employees with the skills needed to create cutting-edge products & solutions that keep our users Ahead of Ready. Who You Are As a Senior Software Engineer in the Radar Modeling and Simulation group, you will develop high performance C++ software. Your contributions will directly support radar modeling, scene modeling, signal construction, signal processing, and radar control processing components within simulation and digital twin environments. Your software will operate as part of a system of systems integrating with external components to enable high volume and high fidelity radar modeling and simulations. You will apply a systems engineering perspective to ensure delivery...

Description: WHO WE ARE: The Skunk Works (Lockheed Martin Advanced Development Programs) is looking for world-class talent in Software Engineering to be a part of a team that will carry on our 80-year tradition-making history in advanced aircraft development. The vehicle management software team writes software for a wide range of aircraft subsystems that make an airplane fly. We are a highly innovative fast paced team working developing modular and reusable software to support both our current platforms and the aircraft of the future. We operate out of the Skunk Works headquarters in Palmdale, CA in a fully onsite and hands on team. WHAT’S IN IT FOR YOU: This team is working new development software where our team members get to work hands on from the lab to the aircraft in all stages of development, including design, code, integration, and lab and field test. We work on a wide range of technologies and give our team members the opportunity to drive their career towards their...

Description: Lockheed Martin’s Victor Portfolio of Space Security is seeking a highly skilled, motivated, and experienced Senior Software Engineer to join an Agile, cross‑functional team dedicated to protecting critical space assets. This role will focus on developing web‑based applications within an open‑architecture infrastructure that supports mission‑critical space‑security operations. The successful candidate will collaborate with internal development teams and subject‑matter experts, and thrive in a fast‑paced environment where each day brings new challenges. Key Responsibilities • Full‑Lifecycle Development – Design, implement, test, deploy, and maintain web applications and services that enable space‑asset protection. • Agile Collaboration – Participate in Scrum ceremonies (stand‑ups, sprint planning, retrospectives) and contribute to continuous‑improvement of team processes. • Open‑Architecture Integration – Build modular, reusable components that conform to...

Description: You will be the Senior Software Engineer for the team which is responsible for the development and delivery of software models with the ability to make independent and solid decisions during the software development process. What You Will Be Doing As the Senior Software Engineer you will be responsible for leading the design, development, and delivery of high‑quality software solutions in a lab environment. You will mentor junior engineers, drive architectural decisions, and collaborate closely with cross‑functional teams to ship reliable, scalable, and high‑performing products. Your responsibilities will include: Lead design and development of software solutions. Mentor junior engineers and foster technical growth. Drive architectural decisions and enforce best practices. Collaborate with cross‑functional teams to ensure reliability and scalability. Oversee delivery, testing, and performance optimization of products. What’s In It...

Position Summary Odyssey Systems is seeking a Senior Software Engineer to support advanced situational awareness and multi-domain operations (MDO) programs. This role focuses on the design, analysis, and integration of RF and signal processing systems that enable next-generation battlefield awareness, electronic warfare, and spectrum management capabilities.   You will work closely with a multidisciplinary team of engineers, analysts, and operators to design and deliver systems that integrate data from diverse sensors, communications, and radar systems to provide actionable intelligence and operational advantage. The ideal candidate brings deep technical expertise in RF, signal processing, and spectrum management, along with experience contributing to mission-critical DoD programs in multi-domain environments.   This is a full time position located at MacDill AFB, FL or Ft. Belvoir, VA.    ***Contingent upon contract award***...

Description: WHO WE ARE At Lockheed Martin, we are driven by innovation and integrity. By applying the highest standards of business ethics and forward‑thinking, we can achieve anything. We value your skills, training, education, and background, and we are committed to providing a work environment that encourages and supports employees to think big, perform with quality, and build incredible products. WHAT WE'RE DOING We are seeking a **Software Engineer** to drive complex software solutions for Mission Systems. Working with only general direction, you will independently define solution approaches, lead design reviews, and ensure software deliverables meet cost, schedule, and technical requirements. THE WORK - Design, develop, and integrate software components for mission‑critical systems. - Lead technical design reviews and validate solutions against requirements. - Collaborate with internal and external customers, cross‑functional teams, and senior technical...

Description: Who We Are Lockheed Martin is dedicated to shaping, developing, & advancing technologies & capabilities with a focus on our customers’ needs as part of our 21st Century Security vision. We foster collaborative innovation, provide opportunities for career development, & empower our employees with the skills needed to create cutting-edge products & solutions that keep our users Ahead of Ready. Who You Are As a Senior Software Engineer in the Radar Modeling and Simulation group, you will develop high performance C++ software. Your contributions will directly support radar modeling, scene modeling, signal construction, signal processing, and radar control processing components within simulation and digital twin environments. Your software will operate as part of a system of systems integrating with external components to enable high volume and high fidelity radar modeling and simulations. You will apply a systems engineering perspective to ensure...

Position: Senior Software Test Engineer (Einfochips) Job Description: What You'll Be Doing: Lead and collaborate with a team of test engineers to ensure effective and efficient testing practices. Partner with cross-functional teams—including software, hardware, and systems engineers—to define testing requirements and priorities. Design, develop, and execute comprehensive test plans and test cases for embedded software and hardware components. Drive the adoption of automated testing frameworks and tools to improve test coverage, reliability, and efficiency. Identify, document, and track defects; communicate findings clearly to development teams and ensure timely resolution. Conduct root cause analysis of defects and lead initiatives to enhance product quality and optimize testing processes. Actively participate in agile ceremonies, including sprint planning, retrospectives, and daily stand-ups, to support collaboration and transparency. Maintain and continuously...

Position Summary Odyssey Systems has an exciting new opportunity for a Test Engineer for the Engineering, Professional, and Administrative Support Services (EPASS) Contract at Peterson SFB. As the Test Engineer you will provide technical and engineering support for Enterprise Resource Planning (ERP) and major IT Test and Evaluation (T&E) to SSC SYD 85 in the S5.   Responsibilities Duties includ e, but not limited to:    Documenting the review, test concept development, test methodology development, test plan development, test execution, and test reporting, data reduction and analysis, and enduser operational testing Using Design of Experiments methods to plan and conduct test programs Independently prepare (or advise others in the preparation of) criteria, computation/analyses, specifications, cost estimates test plans, and technical reports in the specific area of technical expertise Select and apply...

Description: You will be the Circuit Card Design Engineer for Lockheed Martin Missile & Fire Control programs. Our team designs, evaluates, and qualifies circuit cards and test hardware that keep mission critical systems operating reliably in harsh, radiation rich environments such as space based platforms. What You Will Be Doing As the Circuit Card Design Engineer you will oversee technical execution, translate system requirements into subsystem designs, and create electrical interface and power distribution architectures. You will work closely with software, hardware and systems engineers, drive Integrated Master Schedule (IMS) tasking, manage procurement and testing, and guide the team through the Design Assurance process. Your responsibilities will include: • Developing detailed schematics, 3 D models and bill of materials for circuit card assemblies (CCAs) that meet size, weight, power and environmental constraints. • Performing signal integrity, power integrity and...

Description: This position is participating in our External Referral Program . If you know somebody who may be a fit, click here to submit a referral. If your referral is hired, you'll receive a payment! code-extrefer Sr. Capabilities Development Engineer - Clearance Required WHAT WE'RE DOING • Join Lockheed Martin Rotary and Mission Systems, Cyber & Intelligence, where we foster innovation and integrity. • As a Sr. Capabilities Development Engineer, you'll be empowered to create "new realities" and pioneer solutions that break boundaries. • Benefit from the support of a global technology leader that values innovative thinking and provides the resources to turn ideas into reality. • Build on our proud legacy of achievement and contribute to shaping the future of aerospace, defense, and security solutions. THE WORK TKO provides systems engineering, software development, data science and cloud development and engineering services to the Cyber Infrastructure Solutions...

Basic Qualifications Requires a Bachelor’s degree in Computer Engineering, Software Engineering, Computer Science, or a related Science, Engineering, Technology or Mathematics field. Also requires 5+ years of job-related experience, or a Master's degree plus 3 years of job-related experience. Agile experience preferred.     CLEARANCE REQUIREMENTS: : Department of Defense Secret security clearance is required at time of hire. Applicants selected will be subject to a U.S. Government security investigation and must meet eligibility requirements for access to classified information. Due to the nature of work performed within our facilities, U.S. citizenship is required. Responsibilities for this Position ROLE AND POSITION OBJECTIVES: We are seeking a highly skilled and experienced Software Engineer with a Mathematics background to join our dynamic team focused on undersea sensor systems. In this role, you will be responsible...

Basic Qualifications Bachelor’s degree in Software Engineering, or a related Science, Engineering or Mathematics field. Agile experience preferred. CLEARANCE REQUIREMENTS: Department of Defense SECRET security clearance is required at time of hire. Applicants selected will be subject to a U.S. Government security investigation and must meet eligibility requirements for access to classified information. Due to the nature of work performed within our facilities, U.S. citizenship is required. Responsibilities for this Position Make the world’s most advanced Cybersecurity and Encryption products even smarter   Imagine building your career by developing the solutions that support the mission of our nation’s service members, intelligence analysts and first responders. That’s the challenge that’s waiting for you at General Dynamics Mission Systems. Here you have the opportunity to redefine innovation and excellence for the...