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Wissen Logo Wissen · IT - Software Development

Java Developer

India, Mumbai · Job Posted May 29, 2026
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Job Description

Wissen Technology is hiring for Java Developer. We are looking for a Java Developer with strong experience in building enterprise-grade financial applications, statement processing, and reconciliation systems. The role involves developing high-volume transaction processing modules, automated reconciliation pipelines, and exception management workflows using Java, Spring Boot, and Spring Batch. Candidates should have expertise in microservices architecture, SQL/DB2/MS SQL, Hibernate/JPA, and batch processing frameworks. Experience with rule engines such as Drools for business logic automation and reconciliation matching is highly preferred. The candidate will work on scalable, low-latency systems supporting millions of transactions daily in banking and financial environments.

Job Responsibility

  • Design and develop high-volume transaction statement generation modules
  • Build automated reconciliation pipelines
  • Implement exception management workflows
  • Integrate with downstream statement delivery systems (SWIFT, SFTP, email, client portals)
  • Support NOSTRO, VOSTRO, and inter bank reconciliation processes
  • Develop break analysis reports and aging summaries
  • Architect and implement scalable back-office and middle-office financial systems using Java and Spring Boot
  • Build low-latency, high-throughput microservices
  • Develop robust batch processing frameworks using Spring Batch
  • Own full-stack feature delivery
  • Design and optimize complex SQL queries, stored procedures, and database schemas
  • Implement efficient data access layers using Hibernate/JPA
  • Build data pipeline integrations with upstream trade capture systems, risk engines, and market data feeds
  • Perform query tuning, execution plan analysis, and index optimization
  • Design and implement rule-based systems using Drools
  • Author and maintain DRL rule sets
  • Integrate rule engines with Spring Boot services
  • Build rule governance workflows
  • Design decision tables
  • Participate in solution design and architecture reviews
  • Apply enterprise design patterns
  • Conduct code reviews and enforce best practices
  • Work directly with BAs and client stakeholders
  • Write comprehensive unit, integration, and regression tests
  • Support UAT and production issues

Requirements

  • Java (17/21+): Deep expertise in Core Java, generics, collections, streams, functional programming, memory model, and JVM tuning
  • Spring Ecosystem: Spring Boot, Spring MVC, Spring Batch, Spring Data JPA, Spring Security
  • Multithreading & Concurrency: Hands-on with ExecutorService, CompletableFuture, concurrent data structures, and designing deadlock-free, thread-safe reconciliation engines
  • SQL & RDBMS: Advanced SQL, window functions, CTEs, partitioning, bulk operations, and stored procedures in DB2 or MS SQL Server
  • Data Structures & Algorithms: Strong CS fundamentals applied to performance-critical matching, sorting, and aggregation in large datasets
  • Microservices & APIs: RESTful API design and consumption
  • experience with IBM MQ, Kafka or other messaging queues for async reconciliation pipelines is a strong plus
  • Rule Engines: Hands-on experience designing and deploying rule-based systems using Drools or similar frameworks
  • Domain Knowledge: Understanding of transaction lifecycle in banking - trade capture, settlement, confirmation, and clearing
  • NOSTRO/VOSTRO, cash breaks, position breaks, aging analysis, and exception resolution workflows
  • Additional Technical Skills: Maven/Gradle, Git, GitHub Actions, Jenkins, Docker/Pod man basics
  • JUnit 5, Mockito, Test containers for integration testing
  • Splunk, Prometheus/Grafana
  • Working knowledge of Linux/Unix, shell scripting, Cron jobs, log analysis
  • Soft Skills: Experience: 4 to 7 years of professional Java development, with at least 2 years in a financial services or fin tech environment
  • Communication, Problem Solving, Ownership, Collaboration
  • Educational Background: Bachelor's or master's degree in computer science, Information Technology, Engineering, or related field

Nice to have

  • Experience in investment banking or capital markets domain
  • Exposure to production support and incident management
  • Familiarity with Agile/Scrum methodologies
  • Ability to work in a fast-paced and collaborative environment
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