Senior Full Stack Java Developer
Role: Senior Full Stack Java DeveloperLocation: Santa Clara, CA (Onsite 5 days)Duration: 6+ MonthsMUST-HAVE Skills for This RoleFull Stack with Strong Backend Experience — Candidate must demonstrate hands-on backend engineering depth (Java 21 / Spring Boot) alongside front-end capability (React preferred)SQL Server Expertise — Proven, hands-on experience with Microsoft SQL Server: schema design, query optimization, stored procedures, and performance tuningData Mapping — Experience designing and executing data mapping strategies across systems, including field-level mapping, transformation rules, and validation logicData Migration — Demonstrated ownership of end-to-end data migration projects; experience moving data between databases or platforms with integrity checks and rollback planningPower BI — Hands-on experience building Power BI dashboards, semantic/data models, and datasets connected to SQL Server or other backend sources (minimum 20% of recent project scope)Data Transformation — Ability to design and implement transformation logic within ETL/ELT pipelines, including business rule application and data normalizationOverview: We are seeking a highly skilled Contract Senior Full-Stack Software Engineer to join our Manufacturing Execution System (MES) Software Engineering team, reporting to the Software Engineering Manager. This role supports modernization of legacy manufacturing systems into a cloud-native, multi-tenant SaaS platform on Microsoft Azure. This is a hands-on engineering role covering front-end development, backend services, system architecture, and data/analytics enablement, with SQL Server to PostgreSQL migration planned in a later phase. The engineer will work closely with architecture, DevOps, and engineering teams to design and deliver scalable MES SaaS capabilities, APIs, and analytics solutions.Key Responsibilities:Design, build, and deliver MES SaaS product features end-to-end across UI, API, backend, and data layersDevelop modern front-end applications using React (preferred) or Angular/VueBuild backend services using Java 21 and Spring BootDesign and implement RESTful APIs and microservices supporting MES workflowsImplement gRPC-based cross-service communication for high-performance service-to-service interactionUse Temporal for workflow orchestration for complex MES and enterprise processesContribute to solution architecture and system design for scalable multi-tenant SaaS platformRefactor legacy MES components into modular cloud-native servicesDefine and implement multi-tenant SaaS architecture (isolation, scalability, performance)Design and execute data mapping and migration from SQL Server to PostgreSQL (later phase) — including field mapping, transformation rules, and data integrity validation ★Build and support Power BI dashboards and MES analytics layer including semantic models and datasets ★Develop and maintain ETL/ELT data pipelines and transformation logic supporting reporting and analytics ★Work with Azure services (App Services, AKS, Functions), Docker, and KubernetesSupport CI/CD pipelines, testing, and production releasesIntegrate legacy MES systems with modern SaaS servicesMust Have Skills & Experience:Core Engineering8 to 10+ years software engineering experience ( full-stack or backend-heavy with demonstrated backend depth)Strong hands-on architecture, design, and development experienceDeep experience with Java 21 and Spring BootStrong front-end development experience with React (preferred) or Angular/Vue ★ Data & Database — MUST HAVE★ MUST: SQL Server — Deep, hands-on experience with Microsoft SQL Server (schema design, stored procedures, query optimization, indexing strategies, and performance tuning)★ MUST: Data Mapping — Proven ability to design field-level mapping specifications and transformation rules across heterogeneous systems★ MUST: Data Migration — End-to-end ownership of data migration initiatives including planning, execution, validation, and rollback; experience with SQL Server migration preferred★ MUST: Data Transformation — Hands-on ETL/ELT pipeline development with business rule application, normalization, and data quality enforcementStrong experience with PostgreSQL, including migration exposure from SQL ServerStrong understanding of relational database design and performance tuningExperience with data lakes, ETL, or analytics systems ★ Analytics & Reporting — MUST HAVE★ MUST: Power BI — Hands-on experience building dashboards, datasets, and semantic/data models in Power BI; connected to SQL Server or enterprise data sources; must represent a meaningful portion (approx. 20%+) of recent project scope Architecture & CloudExperience designing or working with multi-tenant SaaS applicationsStrong experience with microservices architecture and REST APIsExperience with gRPC for service-to-service communicationFamiliarity with Temporal workflow orchestrationExperience with MES / ERP / manufacturing systems (preferred)Azure cloud experience (App Services, AKS, Functions)Docker, Kubernetes, and distributed systems experienceSoft Skills:Strong technical documentation skills (design docs, architecture diagrams, runbooks)Excellent communication across engineering and business stakeholdersStrong collaborative team player mindsetAbility to operate in a fast-paced, execution-driven environmentStrong ownership and end-to-end delivery accountability