Java Developer

Location: Mohali
Work Mode: 5 Days Work From Office
Shift Timing: 11 AM IST onwards
Experience: 4+ Years
Employment Type: Full-Time
About the Role
We're looking for a Java Developer with strong backend skills and experience building calculation-heavy, finance-related applications.
Key responsibilities
Design, build and maintain backend applications using Java and Spring Boot. Break requirements into modules, write the code end to end, and keep it maintainable as features grow.
Build secure, well-structured REST APIs with proper request validation, error handling, status codes and versioning. Document APIs using Swagger/OpenAPI so other teams can use them easily.
Write clean, readable and testable code that follows SOLID principles and team coding standards. Refactor older code when needed and keep technical debt under control.
Implement business logic for multi-step calculations such as rates, slabs, percentages, fees, rebates and penalties. Make sure every result is accurate, repeatable and easy to trace.
Implement double-entry postings, map each transaction to the correct finance/account codes, and handle reversals, refunds and adjustments without breaking ledger balances.
Write and optimise complex SQL queries, stored procedures, views and reports. Design tables and indexes that keep data consistent and queries fast as volume grows.
Write unit and integration tests for all business logic, with extra focus on calculation edge cases and boundary values. Keep test coverage high so changes can be released with confidence.
Investigate and fix production issues, including calculation or data mismatches. Do root-cause analysis and put permanent fixes in place, not just workarounds.
Take part in code reviews, sprint planning and technical discussions. Work closely with QA, business analysts and finance teams to clarify rules and confirm expected results.
Required skills and experience
4–8 years of hands-on Java development (Java 11 or later; Java 17 preferred), with at least 2 years on enterprise or transaction-heavy applications.
Strong command of OOP concepts, Collections, Generics, Multithreading and concurrency utilities, Exception Handling, Streams and Lambdas. Able to explain why one approach is better than another, not just use it.
Solid experience with Spring Boot, Spring MVC, Spring Data JPA, Hibernate and Spring Security. Understands dependency injection, bean lifecycle, profiles and configuration management.
Has built and consumed RESTful services, including authentication (JWT/OAuth2), validation, pagination and global exception handling. Has integrated with third-party APIs such as payment gateways or banks.
Strong SQL on PostgreSQL, Oracle or MySQL — complex joins, subqueries, window functions, indexing, stored procedures and query tuning using execution plans.
Clear understanding of ACID, isolation levels, optimistic and pessimistic locking, and idempotency. Knows how to prevent duplicate entries and race conditions in multi-user systems.
Uses BigDecimal correctly for money, with defined scale and rounding modes. Knows why double/float must not be used for financial values.
Understands ledgers, journal entries, debits and credits, chart of accounts and finance code structures. Can translate a finance rule into correct and testable code.
Writes unit tests with JUnit 5 and Mockito, and integration tests for APIs and database layers. Comfortable with test-driven thinking for logic-heavy code.
Comfortable with Git branching, Maven or Gradle, Jenkins or other CI/CD tools, and basic Linux commands for deployment and log checks.
B.Tech / BE / MCA in Computer Science, IT or a related field.

Work arrangement
No