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Job Title: Senior Full Stack Java Developer (AI Lab)
Location: Boston, MA (On-site). Philadelphia also considered.
Employment Type: Contract (W2 through ZipStaff — No C2C or 1099)

About the Opportunity:

ZipStaff is seeking a Senior Full Stack Java Developer for an AI Lab team at a financial services organization. You will stay hands-on building Java / Spring applications and modern front ends while influencing architecture, quality, and mentoring. Work is AI- and data-enabled with Product Owners, data scientists, and business stakeholders.

What You’ll Do:

Design, develop, and maintain Java applications in a distributed environment.
Build end-to-end features with React or Angular and Java / Spring Boot (Python or Node.js as needed).
Own features from requirements through implementation, deployment, and production support.
Contribute to AI-enabled and data-driven solutions with data and product teams.

Participate in design and architecture discussions; run code reviews.
Mentor less experienced developers and set engineering standards.
Work with CI/CD and deployment automation; support OpenShift and Azure.
Troubleshoot complex production issues.
Apply RAG, embeddings, vector search, and agentic frameworks (LangChain, LangGraph, CrewAI) where the product needs them.

Required Qualifications:

5+ years hands-on Java development.
Strong Spring (MVC, Data, Security) and enterprise backend systems.
Modern front end: Angular and TypeScript (React acceptable).
SQL and NoSQL, data modeling, and performance.

Messaging / asynchronous processing.
Hands-on Azure.
Agile (Scrum / Kanban).
Ability to work on-site in Boston, MA (Philadelphia considered).
Must be legally authorized to work in the United States without sponsorship now or in the future.

Preferred Qualifications:

OpenShift / Unix-Linux.
RAG, embedding models, vector databases, semantic search.
LLMs and agentic frameworks (LangChain, LangGraph, CrewAI).
Python or Node.js in addition to Java.
Mentoring and technical leadership on a small team.

Benefits:

Health Insurance.
Dental Insurance.
Vision Insurance.
401(k).
401(k) matching.
Paid time off.
Referral Program.

About ZipStaff:

ZipStaff partners with leading organizations to connect skilled technology professionals with high-impact contract opportunities. We focus on quality matches, clear communication, and long-term success for candidates and clients.

To apply, submit your resume highlighting Java / Spring and Angular (or React) work you owned, Azure or OpenShift delivery, and any RAG / LangChain exposure.

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Apply for Senior Full Stack Java Developer (AI Lab) at ZipStaff Inc.