Full Stack Java Developer - React.js

Skills: Java + React + AWS migration experience + AI ToolsLocation: Hyderabad/Chennai/Mumbai/PuneJob Description:In this role, you will modernize mission-critical services written in Java by migrating them to modern Java frameworks like Spring and shaping them into distributed, event-based, cache-driven micro-services using state-of-the-art cloud-native services and infrastructure.You will help establish a platform foundation that enables operational intelligence/observability, end-to-end traceability, and complete auditability.Key Responsibilities:- Translate functionality while improving modularity, maintainability, and test coverage; migrate supporting components and dependencies as needed (e.g., moving from Microsoft foundation class patterns to Java alternatives).- Build cloud-native, modular microservices as part of a unified accounting platform architecture, targeting scalability and high availability.- Design and implement event-driven processing (pub/sub patterns) for near real-time workflows and downstream integrations, aligned to platform real-time event-driven processing goals.- Implement cache-driven performance patterns (e.g., distributed caching, read models, materialized views) to support high-throughput/low-latency accounting workloads.- Drive engineering rigor and parity during migrations: ensure functional equivalence where required, and evolve unit/integration testing to maintain confidence.- Deliver end-to-end traceability and strong operational readiness using comprehensive observability (logging/metrics/tracing), supporting the platforms operational intelligence goals.- Collaborate with product, architecture, and upstream/downstream teams to integrate Investment Accounting services into broader ecosystem flows (e.g., transaction processing distribution patterns and validated event ingestion).- Contribute to platform standards for service design, API contracts, event schemas, resiliency (retries/idempotency), and secure-by-design practices.Required Skills:- Strong hands-on engineering experience with Java and ReactJS, TypeScript in enterprise systems.- Proven track record modernizing legacy codebases, including refactoring for modularity and maintainability.- Experience building distributed systems: concurrency, synchronization, fault tolerance, idempotency, ordering, and throughput tuning.- Knowledge of event-driven architectures (streaming/messaging concepts), including designing event contracts, consumers, and processors.- Strong understanding of performance engineering: profiling, memory/CPU optimization, latency reduction, and capacity planning.- Solid testing discipline: unit/integration testing strategies, regression protection, and automation in CI/CD.- Knowledge and hands on experience of working on platforms like Devin/Blitzy as well. (ref:hirist.tech)