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

Noblis

Senior JAVA Developer

Philadelphia, PA · On-site

$54.75 - $69.75/hr

... Level 3+ or equivalent • Decipher, read and understand code metrics for test coverage from ... Java SE 25 Developer • Must have good communication skills including communication with and with ...

AllSTEM Connections

Java Developer Contractor

Malvern, PA · On-site

$93.60K - $104K/yr

Job Title: Senior Full-Stack Java Developer - Contract Role Overview We are seeking a highly ... Expert-level capability designing, debugging, and scaling core Java application frameworks ...

Seven Seven Software

Full Stack Java Developer

Wilmington, DE · On-site

$51 - $65.75/hr

Wilmington, DE Level: Advanced (10+ years of experience) Work Setup: Onsite (5 days/week) Required Skills: o 10+ years of Full Stack Java experience o Technologies: Spring Boot, Kafka, AWS, Cloud ...

Noblis

Senior JAVA Developer

Philadelphia, PA · On-site

$52.50 - $67/hr

Experience delivering software under CMMI Level 3+ or equivalent * Decipher, read and understand ... Java SE 25 Developer * Must have good communication skills including communication with and with ...

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 ...

Seven Seven Software

Java Developer

Wilmington, DE · On-site

$49.50 - $64/hr

Java, J2EE, Maven, Spring MVC, Unix, Web Services, PL/SQL, AWS/cloud technologies Skill Level: Intermediate (4-7 years) Location: Delaware Job Requirements

Seven Seven Software

Core Java Developer

Newark, DE · On-site

Any domain knowledge in banking esp in trading a plus Level of proficiency: * 5-10 years ... Java proficiency/ certification - none * Working knowledge of the technologies, capability to ...

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 May 31, 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 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 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.
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Mid Level Java Developer jobs near you
Senior JAVA Developer

Senior JAVA Developer

Noblis

Philadelphia, PA • On-site

$54.75 - $69.75/hr

Full-time

Posted 23 days ago

Job description

Job Summary:
Noblis is a company that supports critical missions for government agencies, particularly in defense and federal sectors. They are seeking a Senior JAVA Developer to develop and integrate technology for onboard trainers, focusing on software requirements and lifecycle support.
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 & decipher all 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.
Qualifications:
Required:
• Master's Degree in Computer, Electrical or Electronics Engineering or Computer Science
• 8-10 years of experience with Java programming, specifically Java 17 to Java 25 migration (including records, sealed classes, and enhanced switch)
• Must currently have one of the following certifications: CompTIA Security+, CCNA Sec, CySA, GICSP, GSEC or SSCP
• 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
• Must be a US Citizen
• Must have a Secret Clearance or the ability to obtain one. Active clearance preferred.
Preferred:
• Active Secret Clearance highly preferred
• Experience containerizing large Java monoliths for Docker or RHEL 8/9
• 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, CISSP, Oracle
• Certified Professional: Java SE 25 Developer
• Must have good communication skills including communication with and with people with varying technical knowledge and various levels of management
Company:
Noblis is a nonprofit science, tech strategy organization that works in the public interest to help clients solve most complex problems. Founded in 1996, the company is headquartered in Reston, USA, with a team of 1001-5000 employees. The company is currently Late Stage.

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