Sr. Java Full Stack Developer

Job in Oakland, Alameda County, California, 94616, USA

Listing for: Droisys

Full Time position
Listed on 2026-05-10

Job specializations:

Software Development
Java Developer, Backend Developer, Full Stack Developer, Software Engineer

Salary/Wage Range or Industry Benchmark: 60000 - 80000 USD Yearly USD 60000.00 80000.00 YEAR

Migration project From Java 7.8 to Java 8 or newer version

Key Responsibilities

Analyze, maintain, and modernize legacy Java enterprise applications.
Lead / contribute to migration initiatives, including application server upgrades (e.g., JBoss upgrades) and Java version migration / modernization.
Refactor legacy code to improve performance, scalability, maintainability, and security.
Work on migration efforts such as JBoss 7.x platform upgrades and Java modernization (Java 8+).
Design and develop robust backend services, business logic, and integrations.
Troubleshoot production issues and optimize application performance.
Collaborate with architects, business analysts, QA, and Dev Ops teams during modernization projects.
Ensure best practices in coding standards, testing, and deployment processes.

Required Skills Backend (Primary – 70%)

Strong hands-on experience in Core Java / Java 8
Experience with Spring / Spring Boot
Strong understanding of REST APIs / Microservices
Experience with JBoss / Wild Fly application servers
Hands-on experience in legacy application migration / modernization
Experience in code refactoring and upgrade projects
SQL / Database experience (Oracle / SQL Server / MySQL)
Debugging, performance tuning, and production support experience.

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