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Mid Level Java Developer Jobs in Claymont, DE (NOW HIRING)

MSCCN

JAVA Developer - Philadelphia, PA

Philadelphia, PA · On-site

$75K - $100K/yr

... CMMI Level 3+ or equivalent Decipher, read and understand code metrics for test coverage from ... Java SE 17 Developer (OCPJP 17) Must have good communication skills including communication with ...

MSCCN

JAVA Developer - Philadelphia, PA

Philadelphia, PA · On-site

$100K/yr

... CMMI Level 3+ or equivalent Decipher, read and understand code metrics for test coverage from ... Java SE 17 Developer (OCPJP 17) Must have good communication skills including communication with ...

MSCCN

JAVA Developer - Philadelphia, PA

Philadelphia, PA · On-site

$75K - $100K/yr

Responsibilities Noblis MSD is seeking a well-rounded JAVA Software Developer for the development ... CMMI Level 3+ or equivalent Decipher, read and understand code metrics for test coverage from ...

PKR

Senior Java Backend Engineer

Philadelphia, PA · Remote

$10 - $100/hr

Who You Are You are a senior-level Java engineer who thrives in complex, distributed systems. You take ownership of production services, make thoughtful technical decisions, and collaborate well ...

Mirai, LLC

Full Stack Java Developer

Philadelphia, PA · On-site

$53 - $68.25/hr

Company Description Mirai, LLC is an enterprise level healthcare, finance, and technology solutions ... The Developer will be part of a product team of designers and full-stack developers (Java back-end) ...

Mirai, LLC

Full Stack Java Developer

Philadelphia, PA

$53 - $68.25/hr

Company Description Mirai, LLC is an enterprise level healthcare, finance, and technology solutions ... The Developer will be part of a product team of designers and full-stack developers (Java back-end) ...

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How much do mid level java developer jobs pay per hour?

As of Jul 10, 2026, the average hourly pay for mid level java developer in Claymont, DE is $56.14, according to ZipRecruiter salary data. Most workers in this role earn between $48.99 and $64.04 per hour, depending on experience, location, and employer.

What does a typical workday look like for a Mid Level Java Developer?

As a Mid Level Java Developer, your typical workday often involves writing and testing Java code, troubleshooting existing applications, and participating in code reviews. You'll collaborate closely with other developers, QA engineers, and sometimes product managers in agile sprints to ensure features are delivered according to requirements. Daily stand-up meetings are common, as is the use of tools like Jira for tracking tasks. You may also spend time learning new frameworks or best practices, which helps with both personal growth and contributing to more efficient software solutions.

What is a Mid Level Java Developer job?

A Mid Level Java Developer is responsible for designing, developing, and maintaining Java-based applications. They typically have 2-5 years of experience and work on coding, debugging, and optimizing software solutions. They collaborate with teams, follow best coding practices, and may mentor junior developers. Their role involves understanding project requirements, integrating APIs, and ensuring application performance. Mid Level Java Developers contribute to both backend and frontend development, depending on the project needs.

What are the key skills and qualifications needed to thrive in the Mid Level Java Developer position, and why are they important?

Successful Mid Level Java Developers possess a solid understanding of Java programming, object-oriented design, and commonly used frameworks such as Spring or Hibernate, typically backed by a relevant degree and professional experience. Familiarity with tools like Git, Maven, popular IDEs (e.g., IntelliJ IDEA or Eclipse), and certifications like Oracle Certified Professional Java Programmer (OCPJP) are advantageous. Strong collaboration, problem-solving abilities, and effective communication skills help developers work efficiently within agile teams and cross-functional projects. Mastering both technical and soft skills ensures smooth project delivery, maintainable code quality, and productive teamwork in dynamic software development environments.

What are the most commonly searched types of Java Developer jobs in Claymont, DE? The most popular types of Java Developer jobs in Claymont, DE are:
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Mid Level Java Developer jobs near you

JAVA Developer - Philadelphia, PA

National Guard Employment Network

Philadelphia, PA • On-site

$100K/yr

Full-time

Re-posted 8 days ago

Job description


ATTENTION MILITARY AFFILIATED JOB SEEKERS - Our organization works with partner companies to source qualified talent for their open roles. The following position is available to Veterans, Transitioning Military, National Guard and Reserve Members, Military Spouses, Wounded Warriors, and their Caregivers. If you have the required skill set, education requirements, and experience, please click the submit button and follow the next steps.
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.
Additional Qualifications/Responsibilities
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

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