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Java Open Source Developer Jobs (NOW HIRING)

Vets Hired

Senior Frontend Developer

Richmond, VA

$113K - $149K/yr

Utilize programming languages like JavaScript (Angular, React, Node), HTML/CSS, TypeScript and Java, open source frameworks, RESTful web services, and work on cross-browser and cross-device ...

Rootshell Enterprise Technologies, Inc.

Java Developer

$52.25 - $67.50/hr

Java Developer Location:Remote • Prepare project related documentation, G.A.P. analysis ... data open source programming tools • Work with research teams and data scientists, finding ...

Info Way Solutions

Java Developer

Fremont, CA · On-site

$56 - $72.50/hr

Job Summary : Info Way Solutions is seeking a Java Developer with expertise in Java stack and ... open source frameworks • Automated test frameworks such as JUnit and any JavaScript test ...

Info Way Solutions

Java Developer

Fremont, CA · On-site

$56 - $72.50/hr

Info Way Solutions is seeking a Java Developer. The role involves working with the Java stack ... open source frameworks • Automated test frameworks such as JUnit and any JavaScript test ...

Info Way Solutions

Java Developer

Sunnyvale, CA · On-site

$59.50 - $77/hr

Job Summary : Info Way Solutions is seeking a Java Developer to work onsite in San Jose and ... open source frameworks • Automated test frameworks such as JUnit and any JavaScript test ...

Info Way Solutions

Java Developer

San Jose, CA · On-site

$59.75 - $77.25/hr

Info Way Solutions is seeking a Java Developer to join their team. The role involves working with ... open source frameworks • Automated test frameworks such as JUnit and any JavaScript test ...

Apex Systems

Java Developer

Bentonville, AR · On-site

$43.50 - $56.25/hr

Job#: 3046053 Java Developer Location: Bentonville, Arkansas (Remote) Role Overview We are seeking ... Java/Open Source Company Overview Our organization is a leader in the consumer goods and services ...

Omega Solutions, Inc.

Java Developer MC

Santa Clara, CA · On-site

$60 - $77.50/hr

Omega Solutions, Inc. is seeking a Java Developer for their team. The role involves developing and ... an open source project. • Employ both Object Orientated development skills and Systems ...

R2 Technologies Corporation

Java Developer

Sunnyvale, CA · On-site

$59.75 - $77.50/hr

Java Developer Sunnyvale CA Long-Term Onsite Experience Skillset/JD Data Access Layer (DAL) App ... Open source contributions exp is a plus Skills: Data Access Layer,AZURE,Cassandra,Kafka

PSG Global Solutions

Java Developer

Charlotte, NC

$49.75 - $64.50/hr

Summary: We are looking for a Java developer to be part of new Open Source BPM Framework architecture and implementation. The successful candidate should have a broad range knowledge and skills ...

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Java Open Source Developer information

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How much do java open source developer jobs pay per hour?

As of Sep 12, 2026, the average hourly pay for java open source developer 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 cities are hiring for Java Open Source Developer jobs?

Cities with the most Java Open Source Developer job openings:

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Infographic showing various Java Open Source Developer job openings in the United States as of August 2026, with employment types broken down into 1% As Needed, 78% Full Time, 18% Part Time, and 3% Contract. Highlights an 93% Physical, 2% Hybrid, and 5% Remote job distribution, with an average salary of $117,931 per year, or $56.7 per hour.

Full-Stack Java Developer -- open source & AI-assisted delivery

Rockville, MD • On-site

Neevsys LLC
IT Services • 1 - 10 employees
Learn more about Neevsys LLCexternal

$53.50 - $69/hr

Other

Posted 25 days ago

Job description

Over 10 years we helping companies reach their financial and branding goals. Onum is a values-driven SEO agency dedicated.

Job Description

Neevsys is currently seeking two Senior full-stack Java engineers who build modern, API-driven applications, contribute to open-source software, and use AI development harnesses to accelerate delivery — proficiencies that map directly to building AI business applications on our platform.

Responsibilities
  • Design, build, and maintain full-stack Java applications (backend services and web front-ends) on a cloud-based middleware platform.
  • Integrate large language models, retrieval-augmented generation (RAG), and vector data stores into application features.
  • Use AI development harnesses and agentic coding tools to prototype and ship solutions faster.
  • Contribute high-quality, well-tested code; participate in code review and uphold engineering standards.
  • Work within a secure, government cloud environment and iterate as platform requirements evolve.
Required skills
  • Demonstrable open-source contributions — public repositories and merged pull requests to established projects.
  • Hands-on experience using AI / LLM development harnesses or agentic coding tools to build software.
  • API and service integration; solid SQL and data-handling skills.
  • Ability to learn an unfamiliar platform / middleware stack quickly.
  • US work authorization; clearance eligibility per contract environment.
Preferred
  • GenAI application experience: embeddings, RAG, and vector databases (pgvector, ChromaDB, Pinecone, or similar).
  • Cloud (AWS or Azure) and containerization (Docker / Kubernetes).
  • Prior federal or regulated-environment delivery.
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