Senior Java Developer (Full-Stack)

Actively Reviewing the Applications

Toppan Merrill

4–8 years

Posted 3 days ago • Apply by June 11, 2026

Job 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