Java + React Developer

Wissen Technology is looking to hire a Senior Java Developer with expertise in Core Java, multithreading, collections, and React.js to join their technology team supporting the BFSI sector. Wissen Technology is a well-established organization known for building strong technology teams and delivering high-quality IT solutions to major financial institutions. As a Senior Java Developer at Wissen Technology, you will be responsible for designing, developing, and maintaining high-performance Java applications used in banking and financial services. You will also be involved in developing responsive web applications using React.js and applying your deep technical knowledge in backend development, object-oriented programming, and database optimization. Key Responsibilities: - Design, develop, and maintain high-performance Java applications for the banking and financial services sector. - Develop responsive web applications using React.js. - Utilize expertise in Java collections, concurrency, and multithreading, including executor services and fork/join frameworks. - Optimize JVM performance and memory usage in enterprise-scale systems. - Write clean, maintainable, and efficient code following industry best practices. - Work with relational databases (Sybase, Oracle, SQL Server) and apply advanced concepts like indexing, replication, triggers, and stored procedures. - Collaborate with cross-functional teams to understand requirements and deliver robust solutions. - Participate in code reviews, unit testing, and mentor junior developers. - Troubleshoot and resolve complex application issues in production environments. Required Skills & Qualifications: - 5+ years of hands-on development experience with Core Java. - Strong understanding and practical experience with Collections Framework, Concurrent Programming, and Multi-threading. - Experience in building modern web interfaces using React.js. - In-depth knowledge of the JVM, with experience in performance tuning and memory management. - Solid understanding of Object-Oriented Design and Data Structures. - Expertise in relational database systems (Sybase, Oracle, or SQL Server) with advanced SQL and performance tuning knowledge. - Strong knowledge of database features like CLOB/BLOB, materialized views, replication, and triggers. - Excellent written and verbal communication skills. - BFSI domain experience is a strong advantage. Wissen Technology, a part of the Wissen Group, was established in 2015 and specializes in providing high-end consulting services for organizations in the Banking & Finance, Telecom, and Healthcare domains. They offer a range of services including Core Business Application Development, Artificial Intelligence & Machine Learning, Big Data & Analytics, and more.,