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Toppan Merrill

Senior Java Developer (Full-Stack)

Toppan Merrill · Chennai, Tamil Nadu, India

Financial Services · 1,001-5,000 employees

3 d ago
Senior (5-10 yrs) Full-time India
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About the role

Develop modular Java backend services and responsive React frontends for enterprise portal applications. Implement event-driven integrations, manage cloud-native deployments, and ensure system observability using modern DevOps practices.

What they look for

Java 17+ Spring Boot React 18+ TypeScript RESTful APIs GraphQL Postgres MySQL Docker Kubernetes Azure Microservices CI/CD Event-driven architecture SQL performance tuning Observability

Requirements

Requires 5+ years of experience in full-stack development with strong proficiency in Java, Spring Boot, and React. Candidates must have hands-on experience with cloud-native architectures, containerization, and database optimization.

Full description

Job Description:

About the Role

We're seeking a Senior Java Developer with 5+ years' experience to build high-performing, scalable enterprise portal backends, APIs, and modern React frontends. You'll develop modular services, cloud-native integrations, and headless APIs for robust, production-ready portal applications.

Key Responsibilities

  • Develop modular Java backend services (OSGi modules, Service Builder equivalents) and RESTful/GraphQL headless APIs for enterprise portals.
  • Build responsive React frontends with client extensions consuming portal APIs and state management (Redux/Zustand).
  • Design and optimize Postgres/MySQL databases with advanced entity-service mappings and SQL performance tuning.
  • Implement event-driven integrations using message brokers (RabbitMQ, Kafka, Azure Service Bus) for cross-module communication.
  • Deploy containerized portal applications with Docker/Kubernetes on Azure, ensuring high availability.
  • Optimize performance with distributed caching (Redis, Hazelcast), low-latency APIs, and frontend bundle optimization.
  • Collaborate across full SDLC: API contracts, modular development, frontend integration, deployment, and monitoring.
  • Implement full-stack observability with Prometheus, Grafana, Datadog across backend services and frontend.
  • Implement DevSecOps with automated security scanning, CI/CD pipelines for modular deployments.

Must-Have Skills

  • Backend/Portal: Java 17+, Spring Boot, enterprise portal frameworks (OSGi modules, Service Builder, modular service layers); REST/GraphQL headless APIs.
  • Frontend: React 18+, TypeScript, hooks, component libraries (Material-UI), portal client extensions/API integration.
  • Architecture: Microservices/modular monoliths, design patterns (CQRS, Event Sourcing, repository patterns).
  • Agentic Coding: Proficiency with agentic AI coding assistants for rapid prototyping, refactoring complex OSGi modules, and generating tests across full-stack components.
  • DevOps/CI-CD: Docker, Kubernetes (Helm charts), Jenkins/GitHub Actions, multi-module pipelines.
  • Cloud: Azure (2+ years hands-on).
  • Databases: Postgres/MySQL, JPA/Hibernate, advanced SQL, entity-service mappings.
  • Testing: JUnit/Mockito (backend), Jest/React Testing Library (frontend), integration testing.
  • Tools: Git, Gradle/Maven (multi-module), npm/yarn.
  • Full SDLC experience; OWASP security for enterprise applications.

Nice-to-Have Skills

  • Kafka streaming, Next.js for portal frontends.
  • Infrastructure as Code (Terraform for portal deployments).
  • Advanced monitoring: Datadog, Splunk.
  • Domain-Driven Design, legacy system integration (.NET/mainframes).
  • Portal-specific patterns: content management, user personalization, workflow engines.

Preferred Qualifications

  • Bachelor's/Master’s in computer science.
  • Cloud/Java certifications.