Java +React

Wissen Technology is Hiring for Java + React

About Wissen Technology:

At Wissen Technology, we deliver niche, custom-built products that solve complex business challenges across industries worldwide. Founded in 2015, our core philosophy is built around a strong product engineering mindset—ensuring every solution is architected and delivered right the first time. Today, Wissen Technology has a global footprint with 2000+ employees across offices in the US, UK, UAE, India, and Australia. Our commitment to excellence translates into delivering 2X impact compared to traditional service providers. How do we achieve this? Through a combination of deep domain knowledge, cutting-edge technology expertise, and a relentless focus on quality. We don’t just meet expectations—we exceed them by ensuring faster time-to-market, reduced rework, and greater alignment with client objectives. We have a proven track record of building mission-critical systems across industries, including financial services, healthcare, retail, manufacturing, and more. Wissen stands apart through its unique delivery models. Our outcome-based projects ensure predictable costs and timelines, while our agile pods provide clients the flexibility to adapt to their evolving business needs. Wissen leverages its thought leadership and technology prowess to drive superior business outcomes. Our success is powered by top-tier talent. Our mission is clear: to be the partner of choice for building world-class custom products that deliver exceptional impact—the first time, every time.

Job Summary:

We are looking for a highly skilled Senior Java Developer with a strong background in Core Java, multithreading, collections, and React.js to join our technology team supporting the BFSI sector. The ideal candidate will possess deep technical expertise in backend development with strong proficiency in object-oriented programming, database optimization, and modern UI frameworks.

Key Responsibilities:

• Design, develop, and maintain high-performance Java applications used in banking and financial services.
  
• Develop responsive web applications using React.js.
  
• Apply in-depth knowledge of 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 (QA, DevOps, Business Analysts) to understand requirements and deliver robust solutions.
  
• Participate in code reviews, unit testing, and mentoring junior developers.
  
• Troubleshoot and resolve complex application issues in production environments.
  

Required Skills:

• 5+ years of hands-on development experience with Core Java.
  
• Strong understanding and practical experience with:
  
• Collections Framework
  
• Concurrent Programming
  
• Multi-threading (Executor service, Fork/Join Pool, etc.)
  
• 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 Sites: