Java Backend / L3 ERPSupport Engineer

Synstack Technologies; San Ramon (CA); On-site; USD 120,000 - 180,000; Full time

Job summary

Synstack Technologies in California seeks a Java Backend Engineer with L3 Production Support and WMS/Warehouse + Retail/Supply Chain experience. You will troubleshoot issues at the application/code level, perform RCA, and implement permanent fixes in collaboration with engineering, QA, DevOps, and business teams.

The role requires hands-on experience with Spring Boot, REST/SOAP APIs, microservices, SQL, and on-call production support, plus familiarity with AWS and observability tools.

Qualifications

• L3 Production/Application Support for business-critical apps.
• Hands-on WMS/warehouse/fulfillment systems experience.
• Experience in Retail, eCommerce, Supply Chain, or Warehouse Ops.
• Strong knowledge: Spring Boot, REST/SOAP APIs, microservices, SQL, OOP.
• RCA, incident management, and production deployments.
• On-call support experience and cross-team collaboration.
• Familiarity with warehouse processes: inventory, fulfillment, order processing, shipping, receiving.
• Experience with WMS platforms: Manhattan, Blue Yonder/JDA, HighJump, Körber.
• AWS and observability/monitoring tools preferred.

Responsibilities

• Troubleshoot production issues and perform RCA.
• Implement permanent fixes and production deployments.
• Collaborate with business, engineering, QA, DevOps, and stakeholders.
• Monitor applications and support on-call rotations.

Skills

L3 Production Support

WMS

Retail / eCommerce

Spring Boot

REST APIs

SOAP APIs

Microservices

SQL

OOP

RCA

On-call support

AWS

Observability

Production deployments

DevOps collaboration

Inventory management

Fulfillment processes

Tools

Manhattan WMS

Blue Yonder/JDA

HighJump

Körber

Job description

• Strong experience in L3 Production/Application Support for business-critical applications.
• Hands‑on experience supporting WMS (Warehouse Management Systems) or warehouse/fulfillment applications.
• Experience in Retail, eCommerce, Supply Chain, or Warehouse Operations environments.
• Strong knowledge of Spring Boot, REST/SOAP APIs, microservices, SQL and OOP/OOPS.
• Ability to troubleshoot complex production issues, perform root cause analysis (RCA), and implement permanent fixes.
• Experience with application monitoring, incident management, production deployments, and on-call support.
• Ability to work closely with business, engineering, QA, DevOps/SRE, and other stakeholders.
• Experience with warehouse processes such as inventory, fulfillment, order processing, shipping and receiving is highly preferred.
• Experience with WMS platforms such as Manhattan, Blue Yonder/JDA, HighJump, Körber, or similar is a plus.
• Experience with AWS and observability/monitoring tools is preferred.

Ideal Profile:

Java Backend Engineer with strong L3 Production Support + WMS/Warehouse + Retail/Supply Chain experience, who can troubleshoot and fix issues at the application/code level.