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Java Developer Legacy Jobs (NOW HIRING)

JAVA Developer

Philadelphia, PA

$51.50 - $66.50/hr

Provide engineering services that include development and maintenance in support of hardware and ... Experience maintaining/refactoring large legacy Java codebases (300k+ LOC) * Knowledge of PLC I/O ...

Java Developer

Fort Worth, TX · Hybrid

$48.75 - $63.25/hr

An established aviation technology organization is seeking a Java Developer in Fort Worth, Texas ... Experience modernizing legacy systems or leading refactors.

Java Developer III

Madison, WI

$51.50 - $66.50/hr

Java Developer The Java Developer role is directly involved with the development and support of ... Provide development support for new or existing software products, including legacy applications ...

Java Developer

Jersey City, NJ · On-site

$53.25 - $69/hr

Skill: Java Developer Must Have Technical/Functional Skills: Enterprise Architecture Design ... Application Modernization, Legacy System Migration, Data Architecture, Database Design (Oracle ...

Java Developer

Jersey City, NJ

$53.25 - $69/hr

Skill: Java Developer Must Have Technical/Functional Skills: Enterprise Architecture Design ... Application Modernization, Legacy System Migration, Data Architecture, Database Design (Oracle ...

Sr. Java Developer

Westlake, TX

$55 - $70/hr

Sr Full Stack Java Developer 5 openings Westlake, TX every other week onsite 12 months + Only W2 Consultants Need strong legacy Java experience; Struts is preferred but not required for every role.

Senior Java Developer

Columbus, OH · On-site +1

$55.25 - $70.50/hr

We are looking for an experienced Senior Java Developer with strong expertise in mainframe ... legacy mainframe applications and data structures. Analyze and refactor existing Java applications ...

Java Developer Contractor

Chicago, IL · On-site

$52.50 - $68/hr

... and legacy claims systems. • Mentor Java developers and enforce best practices in secure coding and microservices architecture. Qualifications : Required : • 5-9 years of experience with Java ...

Senior Java Developer

Columbus, OH · Remote

$130K - $140K/yr

We are looking for an experienced Senior Java Developer with strong expertise in mainframe ... legacy mainframe applications and data structures. Analyze and refactor existing Java applications ...

senior java developer

Raleigh, NC

$55.75 - $71/hr

Interview Types * Skills Java Developer Sprin.. Visa Types Green Card, US Citiz.. This is a ... WAM is executing a multiyear reengineering and replatforming initiative to decouple legacy services ...

Java Developer

Chicago, IL · On-site

$52.50 - $68/hr

Java Developer Job Location: Chicago, IL Job Type: Contract * Lead design development and ... Experience migrating legacy BPM tools processes like jBPM Pega etc to Camunda is a plus * Exposure ...

Senior Java Developer

Richmond, VA · On-site

$56.75 - $72.25/hr

... legacy/monolithic applications Strong experience with: Java (8-17) Spring Framework, Spring Boot ... DevOps Containerization technologies with Docker and Kubernetes Education: Bachelor Degree in ...

Java Developer

Greensboro, NC

$44 - $57/hr

Lead Application Developer The Lead Application Developer coordinates systems efforts through ... legacy technologies (Java 8, struts, JWS, WebSphere) while working towards full modernization ...

Senior Backend Java Developer

Mclean, VA · On-site

$121K - $158K/yr

Overview: Position Title * Sr. Backend Java Developer Position Responsibilities Role: Senior ... Modernize legacy backend components while ensuring system stability * Design and optimize ...

Java Developer

Portland, OR

$54 - $70/hr

Java Developer DISYS is currently recruiting for a Java Developer. This contract opportunity is ... Understand legacy Swing based application and translate functionality to a web-based environment.

Sr. Backend Java Developer

Mclean, VA · On-site

$121K - $158K/yr

Overview: Position Title * Sr. Backend Java Developer Position Responsibilities Role: Senior ... Modernize legacy backend components while ensuring system stability * Design and optimize ...

Java Developer

Irving, NY · On-site

$60K - $135K/yr

Java Developer City: Irving State/Province: Texas Posting Start Date: 6/3/26 Wipro Limited (NYSE ... Analyze legacy documentation and design cloud migration solutions. - Translate business ...

Java Developer

Springfield, MA · On-site

$50.75 - $65.75/hr

... to DevOps Legacy tech stack: Struts 2, JSP, JavaScript with AJAX, HTML, XML, Java 6, IBM DB2 ... Preferred Experience designing and leading the development of one or more complex investment ...

Senior Java Developer

$58.50 - $74.75/hr

Role- Senior Java Developer Location- Minneapolis, MN / Remote Job Type: Contract Experience ... The role involves transforming legacy systems into consumer-ready APIs, enabling streaming data ...

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Java Developer Legacy information

See salary details

$15

$56

$77

How much do java developer legacy jobs pay per hour?

As of Jun 12, 2026, the average hourly pay for java developer legacy in the United States is $56.70, according to ZipRecruiter salary data. Most workers in this role earn between $49.04 and $63.46 per hour, depending on experience, location, and employer.

What are Java Developer Legacy roles?

Java Developer Legacy roles focus on maintaining, upgrading, and troubleshooting older Java-based systems that are still in use within organizations. These professionals work with legacy codebases, often written in earlier versions of Java or using outdated frameworks and libraries. Their responsibilities may include bug fixing, refactoring, integrating new features, and ensuring compatibility with modern technologies. Strong problem-solving skills and an understanding of both current and historical Java practices are crucial for success in this role.

What is the difference between Java Developer Legacy vs Java Developer?

AspectJava Developer LegacyJava Developer
Required CredentialsBachelor's in Computer Science or related field, Java certifications often preferredBachelor's in Computer Science or related field, Java certifications often preferred
Work EnvironmentLegacy systems, on-premises servers, older Java frameworksModern Java frameworks, cloud environments, microservices
Employer & Industry UsageFinancial institutions, government agencies, companies maintaining legacy applicationsTech companies, startups, organizations adopting new Java technologies
Search & Comparison IntentUnderstanding roles in legacy system maintenanceSeeking modern Java development opportunities

Java Developer Legacy focuses on maintaining and updating older Java applications, often in legacy systems within traditional industries. In contrast, Java Developer roles typically involve working with modern Java frameworks, cloud integration, and new development projects. Both roles require similar foundational skills, but their work environments and project types differ significantly.

What are the key skills and qualifications needed to thrive as a Java Developer (Legacy), and why are they important?

To thrive as a Java Developer (Legacy), you need strong proficiency in Java (particularly older versions), understanding of legacy frameworks (like Struts or EJB), and experience with maintaining and refactoring existing codebases. Familiarity with legacy databases, application servers, and version control systems is typically required, along with knowledge of build tools such as Ant or Maven. Problem-solving skills, attention to detail, and effective communication are essential soft skills for collaborating on complex, long-standing projects. These skills ensure efficient troubleshooting, smooth integration of updates, and ongoing stability for critical legacy systems.

What are some common challenges faced by Java Developers working with legacy systems, and how can they be addressed?

Java Developers working with legacy systems often encounter challenges such as outdated codebases, limited documentation, and compatibility issues with newer technologies. Addressing these issues typically involves spending time understanding existing architectures, refactoring code to improve maintainability, and collaborating closely with other team members who have historical knowledge of the system. Proactively documenting any changes and gradually introducing modern development practices can also help ease the transition and ensure system stability.
Infographic showing various Java Developer Legacy job openings in the United States as of June 2026, with employment types broken down into 86% Full Time, 13% Part Time, and 1% Contract. Highlights an 81% Physical, 5% Hybrid, and 14% Remote job distribution, with an average salary of $117,931 per year, or $56.7 per hour.
JAVA Developer

$51.50 - $66.50/hr

Other

Medical, Life, Retirement, PTO

Posted 27 days ago


Job description

Responsibilities

Noblis MSD is seeking a well-rounded JAVA Software Developer for the development and integration of PIMCS technology for onboard trainers. This is an onsite position in Philadelphia, PA at the Naval Yard.

Noblis MSD's mission is to support the Naval Sea Systems Command (NAVSEA) and, Naval Surface Warfare Center (NSWCPD) and their missions' to enable research, development, test and evaluation, acquisition, engineering, systems integration, in-service and fleet engineering with cybersecurity, comprehensive logistics, and life-cycle savings.

Responsibilities:

  • Develop software requirements for Machinery Control Systems (MCS) based on the Naval Combatant Design Specification (NCDS), Design Practice Criteria (DPC) manuals, DoD and NAVSEA guidance, marine specifications, and commercial specifications as applicable.

  • Develop software integration designs for networking, supervisory control systems, and other test tools/systems developed inhouse.

  • Develop, maintain, configure, and manage software and hardware installation procedures, instructions, notices and Standard Operating Procedures.

  • Provide engineering services that include development and maintenance in support of hardware and software.

  • Analyze & decipherall automation testing pipelines and scripts from the Platform Independent Machinery Controls System (PIMCS) ecosystem in NSWCPD

  • Analyze & decipher all Jenkins pipelines.

  • Read, develop and decipher Jenkins continuous improvement and continuous deployment (CI/CD) pipelines.

  • Provide software lifecycle support following the NSWCPD Systems Engineering Process (SEP) with applicable Capability Maturity Model Integrated (CMMI) and Institute of Electrical and Electronics Engineers (IEEE) standards and specifications.

Required Qualifications

  • Bachelor's Degree in Computer, Electrical or Electronics Engineering, Computer Science or relevant STEM degree.

  • 3 years of experience with Java programming.

  • Must be a US Citizen

  • Must have an Active Secret Security Clearance, or the ability to obtain one. Active clearance preferred.

  • Proficient in modular monolith architecture, understanding JPMS, classloader isolation, and dependency injection

  • Experience maintaining/refactoring large legacy Java codebases (300k+ LOC)

  • Knowledge of PLC I/O mapping, ladder logic behaviors, and Allen-Bradley ControlLogix/CompactLogix

  • Familiar with SCADA systems like FactoryTalk View, Ignition, or Wonderware

  • Ability to learn PIMCS framework (Platform Independent Machinery Controls System ecosystem in NSWCPD)

  • Experience delivering software under CMMI Level 3+ or equivalent

  • Decipher, read and understand code metrics for test coverage from Sonarqube

  • Fluent and able to navigate in a Linux Operating System

This position is on-site at the Philadelphia Naval Yard.

Desired Qualifications

  • Experience containerizing large Java monoliths for Docker or RHEL 8/9

  • Experience with Java 17 to Java 25 migration (including records, sealed classes, and enhanced switch)

  • Knowledge of JGroups for distributed clustering in legacy Java

  • Leading or mentoring development teams through modernization efforts

  • Collaborating with cybersecurity, systems engineering, and testing teams

  • Participating in IV&V and FQT

  • Writing clear software design documents, ICDs, and release notes

  • Desired certifications: Linux or OS certification, CompTIA Security+, CISSP, Oracle Certified Professional: Java SE 17 Developer (OCPJP 17)

  • Must have good communication skills including communication with and with people with varying technical knowledge and various levels of management

#nowhiring

Overview

Overview

Noblis and our wholly owned subsidiaries, Noblis ESI and Noblis MSD, take on some of the nation's toughest challenges, delivering advanced solutions to our customers' most critical missions. We bring together leading scientific, engineering, and management expertise in a culture grounded in objectivity and collaboration, ensuring our work creates lasting impact across federal missions.

We work with a broad range of government agencies in the defense, intelligence, and federal civilian sectors. Learn more and find opportunities at careers.noblis.org (https://careers.noblis.org/about-noblis/)

Why Work at Noblis

At Noblis, we share a passion for excellence and innovation, and we create an environment where people can do meaningful work while maintaining the balance that keeps them energized and fulfilled. We seek out individuals with a natural curiosity and desire to collaborate and learn. We believe our people are our greatest strength, and we consistently seek exceptionally skilled, mission-driven professionals who care deeply about doing work that enriches lives and makes our nation safer.

Noblis has earned numerous workplace awards (https://noblis.org/who-we-are/awards/) for our culture, our commitment to employee well-being, and our dedication to meaningful, impactful work. We also maintain a drug-free workplace.

Remote/hybrid status is subject to change based on Noblis and/or government requirements.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to race, color, ethnicity, sex, age, national origin, religion, physical or mental disability, pregnancy/childbirth and related medical conditions, veteran or military status, or any other characteristics protected by applicable federal, state, or local law.

If reasonable accommodation is needed to participate in the job application or interview process, to perform essential job functions, and/or to receive other benefits and privileges of employment, please contact us (https://noblis.org/contact) .

EEO is the Law (https://www.dol.gov/general/topic/discrimination) | E-Verify (https://assets.cms.talentplatform.us/zhu9bbm0ym8duz1a5mj8osb7/attachments/iawiyhl3wfqccbsgnpticdz3-federal-e-verify-participation-poster-eng-and-sp-9-11-2024.pdf) | Right to Work (https://www.justice.gov/crt/case-document/file/1133936/download)

Total Rewards

At Noblis we recognize and reward your contributions, provide you with growth opportunities, and support your total well-being. Our offerings include health, life, disability, financial, and retirement benefits, as well as paid leave, professional development, tuition assistance, and work-life programs. Our award programs acknowledge employees for exceptional performance and superior demonstration of our service standards. Full-time and part-time employees working at least 20 hours a week on a regular basis are eligible to participate in our benefit programs. Other offerings may be provided for employees not within this category. We encourage you to learn more about our total benefits by visiting the Benefits (https://careers.noblis.org/benefits/) page on our Careers (https://careers.noblis.org/) site.

Compensation at Noblis is determined by various factors, including but not limited to, the combination of education, certifications, knowledge, skills, competencies, and experience, internal and external equity, location, clearance level, as well as contract-specific affordability, organizational requirements and applicable employment laws. The projected compensation range for this position is based on full time status. For part time or on-call staff, compensation is proportionately adjusted based on hours worked. While monetary compensation is important, it's just one component of Noblis' total compensation package.

Posted Salary Range

USD $78,900.00 - USD $123,300.00 /Yr.