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Senior Java Developer

Job in Sunnyvale, Santa Clara County, California, 94087, USA
Listing for: Flexton Inc.
Full Time position
Listed on 2025-12-01
Job specializations:
  • Software Development
    Backend Developer, Cloud Engineer - Software, Java Developer, Software Engineer
Salary/Wage Range or Industry Benchmark: 45 - 50 USD Hourly USD 45.00 50.00 HOUR
Job Description & How to Apply Below

Base pay range

$45.00/hr - $50.00/hr

Job overview

We are looking for a Java Senior Developer with 6+ years of experience in designing, developing, and migrating enterprise-grade backend applications. The ideal candidate will have deep technical expertise in Java
, Spring Boot
, cloud platforms
, and large-scale data systems
, with a strong emphasis on system design and performance.

Key Responsibilities
  • Design, develop, and implement robust backend applications using Java and Spring Boot
    .
  • Lead or support large-scale application migrations
    , including architectural redesign and infrastructure transition.
  • Manage and migrate large datasets using Cassandra
    , Cosmos DB
    , or Big Query
    .
  • Design, implement, and optimize both relational (Azure SQL) and No

    SQL (Cassandra)
    database solutions.
  • Build and consume RESTful APIs
    , ensuring scalability and high performance.
  • Work with event-driven architectures using Apache Kafka to integrate backend systems.
  • Collaborate with cross-functional teams using modern design-thinking principles to ensure timely, high-quality deliverables.
  • Ensure code quality through unit testing and best practices in backend development.
  • Leverage cloud platforms such as Google Cloud Platform (GCP) and Microsoft Azure for application deployment and scalability.
Required Skills
  • 6+ years of experience in Java backend development
  • Hands-on experience with Spring Boot and REST API development
  • Strong knowledge of data structures
    , algorithms
    , and system design
  • Experience with data migration and management in Cassandra, Cosmos DB, or Big Query
  • Proficiency in relational and No

    SQL database systems
  • Working knowledge of Kafka for event-driven integration
  • Experience with cloud computing platforms (GCP and/or Azure preferred)
  • Strong sense of ownership, accountability, and team collaboration
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Position Requirements
10+ Years work experience
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