Java Developer

Overview

On Site
$60 - $70
Accepts corp to corp applications
Contract - Independent
Contract - W2
Contract - 12 Month(s)

Skills

java
reactive
webflux
Microservices

Job Details

Role: Java Developer
Location: Chicago, IL/ Day 1 onsite
Visa: H1B L2 EAD
Need Passport Number

Description: Full Stack Developer (Java, Spring Boot, Microservices, Kafka, Cloud, Cassandra, Reactive/WebFlux)

Position Overview

We are seeking an experienced Full Stack Developer with strong expertise in Core Java, Advanced Spring Boot, Microservices architecture, Kafka, Cloud Technologies, Cassandra, and Reactive Programming (WebFlux). This role involves building high-performance backend microservices and scalable front-end applications, contributing to system design, and delivering enterprise-grade solutions.

Key Responsibilities

Backend Development

  • Develop, enhance, and maintain Spring Boot microservices using Core Java and advanced Spring features.
  • Implement Reactive Programming using Spring WebFlux, Reactor, and non-blocking I/O patterns.
  • Build scalable REST APIs, asynchronous communication flows, and event-driven components.
  • Integrate and work extensively with Kafka for event streaming, pub/sub, and message processing.
  • Design and implement distributed systems with high availability and resiliency.

Frontend Development

  • Develop responsive, user-friendly UI applications using React / Angular / Vue (based on project needs).
  • Integrate frontend applications with backend APIs and microservices.
  • Ensure modular, reusable components and consistent design patterns.

Cloud & DevOps

  • Deploy and run microservices on major cloud platforms: AWS / Azure / Google Cloud Platform.
  • Utilize Docker, Kubernetes, Helm for containerization and orchestration.
  • Build and maintain CI/CD pipelines (Jenkins, GitHub Actions, Azure DevOps, GitLab).
  • Implement observability logging, monitoring, tracing using ELK, PrometheGrafana, Splunk, or Cloud-native tools.

Data & Storage

  • Design and optimize Cassandra data models, queries, and partition strategies for large-scale datasets.
  • Use Spring Data Cassandra (Reactive) to build reactive persistence layers.
  • Integrate additional data platforms like Redis, RDBMS, or NoSQL stores as needed.

Architecture & System Design

  • Contribute to design discussions and create scalable, secure microservices architecture.
  • Follow 12-factor, cloud-native, and domain-driven design (DDD) principles.
  • Apply security frameworks (OAuth2, JWT, Spring Security) across services and APIs.

Quality & Collaboration

  • Write clean, well-tested code using JUnit, Mockito, Testcontainers, and contract testing.
  • Participate in code reviews, architectural discussions, and pair programming.
  • Work closely with product owners, architects, and cross-functional teams in an Agile environment.
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