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.
What We Do
Toppan Merrill is a global leader committed to simplifying the complexity of regulatory disclosure and regulated communications. We are an innovative and trusted partner for the corporate, legal, financial and health plan markets. Through consultative technology, expert knowledge and service excellence, Toppan Merrill is continuously improving the process of creating compliant communications for capital markets transactions, regulatory disclosure filings, shareholder and member communications and sustainability reporting. Toppan Merrill is part of Toppan Holdings a leading and diversified provider of sustainable, integrated solutions. Learn more at toppanmerrill.com
