Senior Java Developer (7–10 Years)
Geysers International
5 - 10 years
Chennai
Posted: 08/01/2026
Job Description
We are hiring a Senior Java Developer (710 Years) for a large-scale Mainframe to Java migration and modernization program for a well-established US financial services client . The role involves migrating legacy Mainframe systems into modern Java, Spring Boot, and microservices-based architectures , handling high-volume transactional data in a regulated BFSI environment.
Location : Chennai
Client : Reputed Financial Institution USA
Immediate / Short Notice Joiners Preferred
Experience Required
- 710 years of strong hands-on experience as a Java Developer / Senior Java Developer
- Proven experience in legacy system migration , preferably Mainframe modernization or Mainframe to Java migration
- Experience working on enterprise-scale, high-availability systems
Key Responsibilities
- Lead and contribute to Mainframe modernization and legacy application migration
- Analyze Mainframe business logic and re-engineer it into Java 8+/Java 11 Spring Boot microservices
- Design and develop RESTful APIs and distributed microservices
- Define technical design, migration strategy, and data architecture
- Perform code reviews , enforce best practices, and mentor team members
- Collaborate with Mainframe, Data, QA, DevOps, and Architecture teams
- Own performance optimization, scalability, and production readiness
- Work closely with US-based client stakeholders in a client-facing role
- Follow Agile / Scrum development methodologies
Mandatory Technical Skills
- Strong expertise in Java (Java 8 / Java 11 / Java 17)
- Extensive hands-on experience with Spring Framework, Spring Boot, Spring MVC, Spring Data JPA
- Strong understanding of Microservices Architecture and Distributed Systems
- Proven experience in REST API development
- Deep hands-on experience with Hibernate / JPA
- Strong experience with RDBMS , especially DB2 (Oracle / PostgreSQL acceptable)
- Solid knowledge of SQL, data modeling, and performance tuning
- Experience with Maven / Gradle and CI/CD pipelines (Jenkins)
NoSQL & Data Migration Skills (Critical)
- Strong working experience with NoSQL databases , especially Apache Cassandra
- Hands-on experience in Cassandra data modeling and performance tuning
- Experience in data migration, transformation, and reconciliation from Mainframe / RDBMS to NoSQL
- Understanding of high-volume data processing and eventual consistency
Good to Have Skills
- Functional understanding of Mainframe technologies (COBOL, JCL, VSAM, batch processing)
- Experience with Docker, Kubernetes, and containerization
- Exposure to Cloud platforms (AWS / Azure) and cloud migration
- Experience with event-driven architecture
- Strong background in Banking / Financial Services (BFSI) domain
Leadership & Soft Skills
- Strong system design and technical design skills
- Proven ability to mentor developers and lead technical discussions
- Strong analytical and problem-solving skills
- Excellent communication skills in a global delivery model
- Comfortable working in regulated, enterprise financial systems
Job Details
- Employment Type: Full-time
- Work Location: Chennai
- Joining: Immediate / Short Notice preferred
Salary Range
- Market-aligned, based on experience and expertise
Why Join Us?
- Lead a mission-critical Mainframe modernization program
- Work with a top-tier US financial institution
- High technical ownership and architectural exposure
- Opportunity to work on modern Java, microservices, NoSQL, and cloud-native systems
- Long-term, stable engagement
Interested candidates can apply via LinkedIn or share their resume at
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