Lead Java Developer

Hi,

Hope you are doing well.

We are hiring a Lead Software Engineer to own technical direction for a large multi-module Java enterprise platform with a modern React UI, batch processing, partner integrations, and AWS-hosted containerized deployments.

You will lead design and delivery across a mature codebase while modernizing architecture, cloud operations, and developer experience. Experience building AI agents / LLM-powered workflows is a strong plus.

Please advise if you are looking for similar opportunity.

Job Title: Lead Java Developer

Location: Walnut Creek, CA (Hybrid) Local only

Duration: Long term contract

Experience: Prefer 12 - 14 years

In-person interview with client

About the role

We are hiring a Lead Software Engineer to own technical direction for a large multi-module Java enterprise platform with a modern React UI, batch processing, partner integrations, and AWS-hosted containerized deployments.

You will lead design and delivery across a mature codebase while modernizing architecture, cloud operations, and developer experience. Experience building AI agents / LLM-powered workflows is a strong plus.

What you'll do

• Lead end-to-end delivery of features across backend services, APIs, UI, and integrations
• Architect and review solutions in a large Maven multi-module Java/Spring application
• Guide evolution of the platform: legacy server-rendered UI alongside modern React, APIs, and batch jobs
• Own or partner on AWS deployment and reliability for containerized Tomcat services (ECS, CDK pipelines, secrets, observability)
• Mentor engineers, set coding standards, drive design reviews, and improve CI/CD and release quality
• Partner with product and stakeholders on external integrations.
• Diagnose production issues across application, database, and infrastructure layers; strengthen monitoring and runbooks
• Optionally lead or contribute to AI-agent initiatives that automate workflows, data handling, or developer productivity

Required qualifications

• Prefer 12+ years professional software engineering experience; 2+ years in a lead / staff / tech-lead capacity
• Deep expertise in Java (Java 8+; comfort with large enterprise codebases)
• Strong hands-on experience with Spring (MVC, Security, Batch, SOAP/REST), Hibernate/JPA, and relational data modeling
• Solid SQL / MySQL skills: schema design, query tuning, transactional integrity
• Experience with Maven, multi-module builds, and Tomcat (or similar Java app servers)
• Proven AWS experience in production: ideally ECS/Fargate, ECR, ALB, Secrets Manager / SSM, S3, CloudWatch, and IaC (CDK, CloudFormation, or Terraform)
• Experience modernizing or maintaining legacy enterprise systems while delivering incremental improvements safely
• Strong design, debugging, and communication skills; ability to lead without blocking the team

Preferred qualifications

• React (or similar SPA) experience - Vite, Redux/RTK, Material UI a plus
• Observability: Datadog, structured logging, APM, on-call practices
• Docker, CI/CD (Jenkins, CodePipeline/CodeBuild), artifact registries (CodeArtifact/Nexus)
• AI agent building experience (plus): Tool-calling agents, MCP, or workflow automation agents applied to enterprise systems

Ash Kumar m: +1 (408) 459-7163 w: www.e-solutionsinc.com e: ash@e-solutionsinc.com "Disclaimer: E-Solutions Inc. provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, disability, genetic information, marital status, amnesty, or status as a covered veteran in accordance with applicable federal, state and local laws. We especially invite women, minorities, veterans, and individuals with disabilities to apply. EEO/AA/M/F/Vet/Disability."