Explore 5 java software engineer jobs from 3 hiring companies in Sumner, IL, US. Filter by remote, salary, experience, and company, then open any listing to apply.

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Java Software Engineer

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Java Software Engineer Jobs

SAIC

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TRISTAR

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Caci

Job Title: Software Engineer (Real-Time Systems / C2 Integration)Job Category: EngineeringTime Type: Full timeMinimum Clearance Required to Start: SecretEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Local* * * The Opportunity: This role supports the integration of missile software from an external weapon system provider into an existing Navy Command and Control (C2) software baseline at Dahlgren. The engineer will focus on real-time software integration, message handling, and power sequencing within Linux and RTOS-based environments. This effort supports operational weapon system integration and requires disciplined software engineering across the full Software Development Lifecycle (SDLC). Responsibilities:<ul><li>Integrate externally developed missile software components into an existing C2 software baseline.</li><li>Implement and validate message sequencing and power-up/power-down sequencing between weapon software and the C2 system.</li><li>Develop, analyze, and modify real-time software operating in Linux and RTOS environments.</li><li>Utilize Real-Time Java within VxWorks-based systems.</li><li>Analyze existing software baselines to understand behavior, interfaces, and constraints.</li><li>Debug, test, and validate software through automated unit testing and system integration testing.</li><li>Apply Open Architecture principles when integrating software with COTS hardware and middleware.</li><li>Follow established SDLC and software configuration management processes.</li><li>Communicate technical status, risks, and progress to engineering and program leadership.</li></ul> Qualifications: Required: <ul><li>Bachelor’s degree in Computer Science, Software Engineering, or a related technical discipline.</li><li>Demonstrated knowledge of software development principles and Object-Oriented Design.</li><li>Proficiency in C&#43;&#43; and Java.</li><li>Experience developing and debugging software in Linux environments.</li><li>Experience analyzing and modifying existing software codebases.</li><li>Experience implementing full SDLC activities beyond code development alone.</li><li>Experience with software testing, including automated unit and integration testing.</li><li>Ability to work independently and collaboratively to meet program schedules.</li><li>Strong written and verbal technical communication skills.</li><li>Eligibility to obtain and maintain at least an Interim Secret clearance.</li></ul> Desired:<ul><li>Experience with Real-Time Operating Systems (RTOS), particularly VxWorks.</li><li>Experience using Real-Time Java in embedded or mission-critical systems.</li><li>Experience with Red Hat Enterprise Linux (RHEL) 8 and 9 or comparable enterprise Linux distributions.</li><li>Familiarity with Open Architecture systems, middleware, and COTS hardware platforms.</li></ul>This position is contingent on funding and may not be filled immediately. However, this position is representative of positions within CACI that are consistently available. Individuals who apply may also be considered for other positions at CACI._________________________________________________________________________What You Can Expect: A culture of integrity.At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.An environment of trust.CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.A focus on continuous growth.Together, we will advance our nation&#39;s most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy. Your potential is limitless. So is ours._________________________________________________________________________Pay Range: There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.Since this position can be worked in more than one location, the range shown is the national average for the position.The proposed salary range for this position is: $82,100-$172,400CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.

Software Engineer (Real-Time Systems / C2 Integration)

Software Engineer

Bachelor's in CS/Software Eng or related field; proficiency C++ and Java; Linux/RTOS experience; SDLC and testing; ability to obtain Interim Secret clearance.

Description 
Position: Computer Engineer II  
 SAIC is seeking a Computer Engineer II to support the Expeditionary Electronic Warfare Division at NSWC Crane. This position supports systems integration and development testing for the Testing Infrastructure Group (TIG). TIG at NSWC Crane provides specialized, high-reliability facilities and engineering expertise for the full life cycle --design, development, test, and evaluation --of Navy strategic systems, electronic warfare, and weapon systems. They focus on critical testing for radiation hardening, hardware-in-the-loop, and complex electronic systems to ensure mission success. You will be working onsite in a fast paced and dynamic environment where teamwork and collaboration are essential. SECRET to CLEARANCE Requirement: Interim Secret to start. Continued employment contingent upon favorable final Secret clearance. 
 Responsibilities: 
 ·         Develop, test, and maintain software code and components based on defined requirements and design specifications 
 ·         Support full SDLC, including coding, unit tests, integration, and defect resolution 
 ·         Support system integration and Developmental Test (DT) activities 
 ·         Troubleshoot and resolve software defects and performance issues 
 ·         Contribute to technical documentation (design desc., test procedures, guides) 
 ·         Collaborate with cross-functional teams (systems engineering, cybersecurity, T&amp;E) 
 ·         Follow configuration management and version control processes 
 ·         Implement secure coding practices and support RMF-aligned requirements 
  		 
		Qualifications 
Skills and Experience: ·         3 -6 years of relevant experience ·         Working knowledge of programming languages (e.g., Java, C++, Python)Experience in Agile or iterative development environments ·         Applies standard principles and practices ·         Works on defined tasks with independence and limited guidance for complex issues Education: ·         Bachelor's degree in Computer Science, Software Engineering, or related field

TIG Computer Engineer II

Computer Engineer

3-6 years of relevant experience; programming in Java, C++, Python; Agile development; Bachelor's in CS, Software Engineering, or related field.

Description 
Position: Computer Engineer III 
 SAIC is seeking a Computer Engineer III to support the Expeditionary Electronic Warfare Division at NSWC Crane. This position is responsible for performing Threat Load Development on the Ground  - Based Air Defense (GBAD) and Multi-Function Electronic Warfare systems (MFEW). Both systems represent a modernization effort aimed at protecting Marines from air threats, specifically unmanned aircraft systems (UAS), cruise missiles, and aircraft. GBAD program aims to detect, track, identify, and defeat adversary air threats. It is focused on accelerating the delivery of counter-UAS (C-UAS) technology to Marines. The MFEW system is a crucial, rapidly deployed tool for electronic warfare (EW), often used to support the Marine Air-Ground Task Force (MAGTF). The ideal candidate will be at the forefront in the design, development and execution of complex systems as well as developing and executing test and evaluation procedures. You will be working onsite in a fast paced and dynamic environment where teamwork and collaboration are essential. Must posses current SECRET clearance and eligible to obtain TS/SCI. 
 Responsibilities: 
 Computer Engineer III will be responsible for the following: 
 ·         Design, develop, and integrate complex software systems and applications aligned to program and mission requirements. 
 ·         Contribute to software architecture and technical solutioning. 
 ·         Lead or support system integration, testing (DT), and defect resolution efforts. 
 ·         Perform advanced debugging, performance tuning, and root cause analysis. 
 ·         Ensure requirements traceability and alignment with system design artifacts. 
 ·         Interface with government stakeholders, including PMAs and organizations such as NAVSEA and NAVAIR, as well as Marine Corps Systems Command (MCSC). 
 ·         Enforce secure coding standards and support compliance with RMF/CMMC requirements. 
 ·         Review code, designs, and technical deliverables for quality and compliance. 
 ·         Provide guidance and mentorship to junior developers. 
 ·         Identify and mitigate technical risks. 
  		 
		Qualifications 
Skills and Experience: ·         5-7 years of relevant experience and working knowledge of programming languages (e.g., Java, C++, Python) ·         Experience in Agile or iterative development environments ·         Apply standard principles and practices ·         Works on complex tasks independently ·         Will lead small technical efforts or mentor others  Education: Bachelor's degree in Computer Science, Software Engineering, or related field

Computer Engineer III

5-7 years in software engineering with Java, C++, Python; Agile experience; secure coding practices; mentorship; strong debugging and integration skills.

Description 
Position: Computer Engineer III 
 SAIC is seeking a Computer Engineer III to support the Expeditionary Electronic Warfare Division at NSWC Crane. This position is responsible for performing Threat Load Development on the Joint Counter Radio-Controlled Improvised Explosive Device (RCIED) Electronic Warfare (JCREW) family of electronic jamming systems designed to protect military personnel. The JCREW system is a multi  - form factor system used by the U.S. and our allies to counter both unmanned aerial systems and improvised explosive devices. The ideal candidate will be at the forefront in the design, development and execution of complex systems as well as developing and executing test and evaluation procedures. You will be working onsite in a fast paced and dynamic environment where teamwork and collaboration are essential. Must posses current SECRET clearance and eligible to obtain TS/SCI. 
 Responsibilities: 
 Computer Engineer III will be responsible for the following: 
 ·         Design, develop, and integrate complex software systems and applications aligned to program and mission requirements. 
 ·         Contribute to software architecture and technical solutioning. 
 ·         Lead or support system integration, testing (DT), and defect resolution efforts. 
 ·         Perform advanced debugging, performance tuning, and root cause analysis. 
 ·         Ensure requirements traceability and alignment with system design artifacts. 
 ·         Interface with government stakeholders, including PMAs and organizations such as NAVSEA and NAVAIR, as needed. 
 ·         Enforce secure coding standards and support compliance with RMF/CMMC requirements. 
 ·         Review code, designs, and technical deliverables for quality and compliance. 
 ·         Provide guidance and mentorship to junior developers. 
 ·         Identify and mitigate technical risks. 
  		 
		Qualifications 
Skills and Experience: ·         7+ years of relevant experience and working knowledge of programming languages (e.g., Java, C++, Python) ·         Experience in Agile or iterative development environments ·         Apply standard principles and practices ·         Works independently on complex tasks  ·         Will lead technical efforts and may mentor others Education: Bachelor's degree in Computer Science, Software Engineering, or related field

JCREW Computer Engineer III

7+ years in programming (Java, C++, Python); Agile environments; design, development, testing; secure coding; bachelor’s in CS/SE; TS/SCI eligibility and SECRET clearance.

DescriptionWe are seeking a talented and dedicated Computer Engineer II to join our dynamic development team. In this role, you will be responsible for developing, testing, and maintaining high-quality software code and components that meet our business needs and technical standards. This is an excellent opportunity for a professional looking to grow their expertise in a collaborative and innovative environment. Key Responsibilities<ul><li>Participate in the full SDLC, including coding, unit testing, integration, and defect resolution.</li><li>Support system integration and Developmental Test (DT) activities.</li><li>Troubleshoot and resolve software defects and performance issues.</li><li>Contribute to technical documentation (design descriptions, test procedures, user guides).</li><li>Collaborate with cross-functional teams (systems engineering, cybersecurity, T&amp;E).</li><li>Follow configuration management and version control processes.</li><li>Implement secure coding practices and support RMF-aligned requirements.</li></ul>Requirements<ul><li>3 years of professional experience in computer design, software development or computer networks.</li><li>Bachelor's level degree in Computer, Electrical or Electronics Engineering or Mathematics with field of concentration in computer science.</li><li>3–6 years of relevant experience.</li><li>Working knowledge of programming languages (e.g., Java, C++, Python).</li><li>Experience in Agile or iterative development environments.</li><li>Must be a U.S. Citizen.</li><li>Must be able to obtain and maintain an active security clearance.</li></ul> About TRISTARTRISTAR is an SBA certified Service-Disabled Veteran-Owned professional services company supporting the U.S. Department of Defense programs. Our core competencies include Electronic Warfare, Enterprise Management, Full Spectrum Cybersecurity, Information Technology, Digital Transformation, Software Engineering and Development, Maritime Modernization and Engineering, and Technical Solutions. TRISTAR was founded in March 1995 and has built an employee-focused collaborative environment which enables our team of professionals to create and deliver customized solutions to meet our customers’ mission critical challenges. TRISTAR’s core capabilities support customers with end-to-end solutions. For over 30 years, TRISTAR has demonstrated and perfected our ability to successfully manage any task, small or large no matter how difficult or complex. TRISTAR is proud to serve the Department of Defense and other Federal Agencies. TRISTAR provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.

Computer Engineer II

3 years of professional experience in computer design, software development or computer networks; Bachelor's in Computer, Electrical or Electronics Engineering or Mathematics with CS concentration; 3–6 years of relevant experience; programming in Java, C++, Python; Agile environment; US citizen; able to obtain active security clearance.

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