Sr Java Developer
ABOUT SONATA SOFTWARESonata Software, with over $1.2 Billion Revenue, is a leading AI-first Modernization Engineering company, powered by our unique PlatformationTM framework. Our 6400+ AI Engineers are helping enterprises transform from systems to intelligent business platforms leveraging partner ecosystem to drive speed, efficiency and growth. Our bouquet of Modernization Engineering Services with AI -first approach cuts across Cloud, Data, AI, Dynamics, Test Automation, and Managed Services.Sonata’s AI-led modernization is enabled by a powerful suite of proprietary tools and assets. At the core is the Harmoni.AI Enterprise Platform, which includes AgentBridge-a governance and observability framework; Agent Builder-a development toolkit for fungible agents integrated into enterprise systems; and the Agent Marketplace-an internal ecosystem for modular, reusable agents.Headquartered in Bengaluru, India, Sonata Software has a strong global presence, including key regions US, UK, India, Malaysia, Mexico, Australia, DACH (Germany/Switzerland) & Nordics (Finland). We are a trusted partner of Fortune 500 companies in Banking, Financial Services and Insurance; Healthcare and Lifesciences; Telecom, Media, and Technology; and Retail, Manufacturing and Distribution space.Deep collaborations with partners like Microsoft, AWS, Salesforce, and Snowflake strengthen our ability to deliver cutting-edge AI solutions. Our 30+years of partnership with Microsoft, and being part of the elite Microsoft Inner Circle, places us among the top 1% of global Microsoft partners. Sonata is now among the first companies to earn the Microsoft Frontier Partner Badge Also; Sonata Software is proud to achieve AWS Premier Tier Status in the AWS Partner Network.Job Title: Sr Java DeveloperLocation: Walnut Creek, CA (Hybrid)Duration: Long term contractExperience: 8+ yearsIn-person interview with clientAbout the roleWe 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 doLead end-to-end delivery of features across backend services, APIs, UI, and integrationsArchitect and review solutions in a large Maven multi-module Java/Spring applicationGuide evolution of the platform: legacy server-rendered UI alongside modern React, APIs, and batch jobsOwn 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 qualityPartner with product and stakeholders on external integrations.Diagnose production issues across application, database, and infrastructure layers; strengthen monitoring and runbooksOptionally lead or contribute to AI-agent initiatives that automate workflows, data handling, or developer productivityRequired qualifications8+ years professional software engineering experience; 2+ years in a lead / staff / tech-lead capacityDeep 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 modelingSolid SQL / MySQL skills: schema design, query tuning, transactional integrityExperience 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 safelyStrong design, debugging, and communication skills; ability to lead without blocking the teamPreferred qualificationsReact (or similar SPA) experience — Vite, Redux/RTK, Material UI a plusObservability: Datadog, structured logging, APM, on-call practicesDocker, 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 systemsWhy join Sonata Software?At Sonata, you´ll have an outstanding opportunity. The chance to use your skills and imagination to push the boundaries of what´s possible. To build never seen before solutions to some of the world’s toughest problems. You´ll be challenged, but you will not be alone. You´ll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next.Sonata Software is an Equal Opportunity Employer encouraging diversity in the workplace. All qualified applicants will receive consideration for employment without regard to race, national origin, gender identity, age, religion, disability, sexual orientation, veteran status, marital status, or any other characteristics protected by law