Explore 4 java software engineer jobs from 4 hiring companies in Grayville, 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

Amentum

CACI

Matrix Design Group

SAIC

Onsite

Hybrid

Matrix designs, manufactures, and sells innovative technological products that help keep people safe. Originally focused on the underground coal mining industry, Matrix has expanded into new industrial markets in the United States and globally. 
We are currently seeking a skilled and motivated Test and Validation Software Engineer to join our dynamic team. As a Test Engineer, you will play a crucial role in ensuring the quality and reliability of our products through comprehensive testing and validation processes. Your expertise will contribute to the development of high-quality software and hardware solutions that meet or exceed customer expectations. This position works in a team environment at our home office in Newburgh, IN. This is not a remote position. 
This position reports to the Manager of Testing and Validation.
Duties and Responsibilities 
<ul><li>Collaborate with cross-functional teams to understand product requirements and specifications.</li><li>Develop a comprehensive testing framework and define testing parameters based on input from the product design team.</li><li>Implement the testing framework to monitor the process, document the results, and take steps to troubleshoot.</li><li>Develop test environments and test cases for all software and electrical systems.</li><li>Provide feedback to the tested products.</li><li>Ensure products and procedures meet all industry quality standards.</li><li>Conduct data analysis from test results, detect issues, and track root causes.</li><li>Build automated testing systems for regular testing of our products.</li><li>Identify test scenarios, test cases, and test data to cover all aspects of product functionality and use cases.</li><li>Prioritize testing efforts based on risk assessment.</li><li>Perform various types of testing, including functional, regression, performance, usability, compatibility, and security testing.</li><li>Execute test cases and validate product features against requirements.</li><li>Utilize automated testing tools and frameworks to increase efficiency and repeatability of tests.</li><li>Report and track defects in a detailed manner using designated bug tracking systems.</li><li>Develop and maintain automated test scripts and frameworks to streamline repetitive testing processes.</li><li>Continuously improve and expand the test automation suite to cover new features and use cases.</li><li>Collaborate with the development team to implement and maintain integration tests and continuous integration pipelines.</li><li>Create and maintain clear and detailed documentation for test plans, test cases, test results, and testing processes.</li><li>Generate testing reports to communicate testing progress, results, and issues to relevant stakeholders.</li><li>Work closely with software and hardware engineers, product managers, and other team members to ensure effective communication and understanding of project requirements.</li><li>Participate in design reviews and provide feedback from a testing perspective to identify potential issues early in the development process.</li><li>Stay up to date with industry trends, best practices, and emerging technologies related to software and hardware testing.</li><li>Identify opportunities for process improvements and suggest enhancements to optimize testing procedures and outcomes.</li><li>Creative and out-of-the-box thinker.</li></ul>
Qualifications &amp; Competencies
<ul><li>Bachelor’s degree in computer science, Engineering, or a related technical field.</li><li>Five or more years of proven experience as a Test Engineer or similar role, preferably in the field of sensors and imaging, controls, and software development.</li><li>Experience with high voltage and AC/DC Power 800V+. (Desirable)</li><li>Experience with Hardware, Firmware, and Software and Apps Testing.</li><li>Proficient in LabView and National Instrument Software and Hardware, such as Data Acquisition Systems DAQ.</li><li>Basic communication protocol experience, such as CAN, RS-232, and RS-485.</li><li>Strong understanding of common lab tools, such as Oscilloscopes, Spectrum Analyzer, NI LabView, NI DAQ, and Digital Multi-Meters (DMMS).</li><li>Experience in mechanical and electrical fixturing and basic drawing.</li><li>Strong understanding of software testing methodologies, testing types, and quality assurance principles.</li><li>Proficiency in using testing tools and frameworks for both manual and automated testing.</li><li>Proficiency with programming languages (e.g., Python, Java, C++, LabView, Macros) to develop and maintain test scripts.</li><li>Familiarity with version control systems, continuous integration, and continuous deployment practices.</li><li>Excellent problem-solving skills and keen attention to detail.</li><li>Effective communication skills to collaborate with cross-functional teams and convey testing results.</li><li>Ability to multitask and excellent time management skills.</li></ul>
Working Conditions
<ul><li>This position will mostly work in a climate-controlled lab setting but may test larger equipment in an industrial warehouse setting.</li><li>Frequent use of computers and test equipment; work may require sustained attention to detail and occasionally extended periods of sitting or standing.</li><li>May be exposed to moderate noise, moving equipment, and varying temperatures in warehouse areas.</li><li>Required to follow all safety policies and procedures, including use of appropriate personal protective equipment (PPE) when working in the lab, warehouse, or customer environments.</li><li>Work may involve exposure to electrical hazards and the use of hand tools, power supplies, and test fixtures; adherence to ESD controls and lockout/tagout or other required safety practices may be necessary.</li><li>Occasional travel to customer sites may be required; work may include entering industrial environments and complying with site-specific safety rules.</li><li>Work schedule is generally aligned to standard business hours; occasional overtime or schedule adjustments may be needed to support testing timelines or customer needs.</li></ul>
Physical Requirements
The employee is occasionally required to stand; walk and stoop, or crouch. The employee may need to lift and/or move up to 50 pounds. Specific vision abilities required by this job include close vision, distance vision, color vision, peripheral vision, depth perception and ability to adjust focus.
Physical Demands: The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. #LI-OnsiteBenefits<ul><li>First day coverage of all benefits - no waiting period</li><li>Premium free medical, dental and vision insurance – working spouse must take single major medical at their place of employment if offered</li><li>On-site health clinic</li><li>Basic Life (2x annual base salary at no cost)</li><li>Optional Life and Accidental Death and Dismemberment (AD&amp;D) insurance</li><li>Short-Term and Long-Term Disability insurance (no cost)</li><li>401(k) Plan with up to an 8% company match</li><li>FSA for Health Care and Dependent Care</li><li>10 Paid annual holidays plus vacation time</li><li>Educational Reimbursement Program</li><li>Scholarship Program</li><li>Optional Gym Membership</li><li>ESports Room</li></ul>

Test and Validation Software Engineer

Five+ years as a Test Engineer; Bachelor’s in CS/Engineering; LabVIEW/Ni DAQ; Python/Java/C++; software and hardware testing; CI/CD; strong communication.

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.

Amentum is seeking a Mid-Level or Senior Level Software Engineer to support  the design, testing, and fielding of advanced automated test system solutions for Naval Aviation activities. The Mid-Level Software Engineer will contribute to the development of hardware and software capabilities used to support organizational, intermediate, and depot-level maintenance of Airborne Electronic Attack (AEA) systems. The role focuses on creating and sustaining software solutions for automated test program sets (TPS) and operational test program sets (OTPS) used in depot maintenance and flight line verification environments.Job Duties and Responsibilities: Develop, integrate, test, and maintain software for automated test systems and TPS applications supporting AEA systems<ul><li>Collaborate with multidisciplinary engineering teams to design and implement software solutions for test and evaluation environments</li><li>Support development of Fleet OTPS and flight line operational verification test systems</li><li>Participate in requirements analysis, system design, code reviews, and verification/validation activities</li><li>Troubleshoot and resolve software defects in test systems and depot support tools</li><li>Develop and maintain technical documentation, including software design documents and test procedures</li><li>Support system integration, fielding, and sustainment activities</li><li>Ensure compliance with applicable engineering standards, cybersecurity requirements, and configuration management processes</li></ul>Required Qualifications:<ul><li>Bachelor’s degree in Computer Science, Software Engineering, Electrical Engineering, or a related technical field</li><li>3–7 years of professional software development experience</li><li>Proficiency in one or more programming languages such as C/C&#43;&#43;, C#, Python, or Java</li><li>Experience with automated test systems, embedded systems, or hardware/software integration</li><li>Familiarity with software development lifecycle processes and version control tools</li><li>Strong analytical, troubleshooting, and problem-solving skills</li><li>Ability to work effectively in a team environment and communicate technical concepts clearly</li><li>Must be able to obtain and maintain a US Government Secret Clearance. Please note US Citizenship is required to obtain a Secret Clearance.</li></ul>Preferred Qualifications:<ul><li>Active Secret Clearance</li><li>Experience with TPS/OTPS development or automated test equipment</li><li>Knowledge of avionics or electronic warfare systems</li><li>Familiarity with lab instrumentation and test interfaces</li><li>Experience working in defense or aerospace environments</li><li>Understanding of Agile or DevSecOps development practices</li></ul>       Compensation Details:$120,000-$200,000       The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws. Benefits Overview:Our health and welfare benefits are designed to support you and your priorities. Offerings include:<ul><li>Health, dental, and vision insurance</li><li>Paid time off and holidays</li><li>Retirement benefits (including 401(k) matching)</li><li>Educational reimbursement</li><li>Parental leave</li><li>Employee stock purchase plan</li><li>Tax-saving options</li><li>Disability and life insurance</li><li>Pet insurance</li></ul> Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O&#39;Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.       Original Posting:04/08/2026 - Until FilledAmentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.       Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed,  marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at <a href="https://postings.govdocs.com/#/vxSkbztPuAwwxfs" target="_blank">Labor Laws Posters</a>.

Mid-Level/Senior Level Software Engineer

Bachelor's in a related field; 3–7 years’ software development; proficiency in C/C++, C#, Python, or Java; experience with automated test systems; ability to obtain US Secret Clearance.

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

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.

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