4Bell Technology

Job Description

Key Responsibilities

•     Lead technical execution for an assigned Java engineering workstream — managing sprint-level delivery, code quality, and developer output across a team of offshore senior engineers

•     Implement and enforce Spring Boot 3.x / Spring Framework 6.1 / Java 17 development standards, including the javax.* → jakarta.* migration patterns defined by the Solution Architect

•     Conduct structured code reviews for all developers in the workstream; enforce ≥80% unit test coverage and integration test pass criteria before SIT handoff

•     Translate OpenAPI 3.1 contract specifications into Spring Boot microservice implementations, ensuring contract fidelity across all assigned service builds

•     Coordinate with the Solution Architect on technical decisions, escalate blockers early, and maintain architecture alignment across parallel delivery waves

•     Guide junior and senior developers through complex Spring MVC, Thymeleaf, or microservice implementation challenges

•     Confirm SIT-readiness at dev close for each delivery wave — review integration test results and sign off before environment handoff to QA

•     Contribute to architecture decision records (ADRs) and workstream handover documentation at engagement close

Required Qualifications

•     8+ years of Java enterprise development, with at least 2 years in a Tech Lead or senior engineering lead capacity

•     Expert hands-on proficiency in Spring Boot 3.x, Spring Framework 6.1, Spring MVC, and Java 17

•     Deep understanding of the jakarta.* namespace migration and Spring Boot 3.x upgrade patterns

•     Experience implementing REST microservices from OpenAPI 3.1 / Swagger specifications in a contract-first workflow

•     Hands-on experience with Apache Kafka and RabbitMQ for event-driven messaging and distributed pub/sub in production Java microservices

•     Solid SQL proficiency and production experience with Oracle and PostgreSQL — schema design, query optimization, and integration with Spring Data / JPA

•     Strong command of enterprise caching — Redis (cache-aside, TTL strategies, distributed invalidation) and Spring Cache abstraction (@Cacheable, @CacheEvict, @CachePut); able to enforce consistent caching standards across a development team and guide correct cache selection for different service patterns

•     Expert knowledge of Java multithreading and concurrent programming — ExecutorService, CompletableFuture, thread-safe design patterns, and the ability to identify and resolve concurrency issues (race conditions, deadlocks, thread contention) in code reviews

•     Strong unit and integration testing discipline — JUnit 5, Mockito, Spring Test — with a track record of enforcing coverage standards across a team

•     Demonstrated ability to lead offshore developers in a structured, review-gated delivery environment