Java Full Stack US CitGC Only

Role: Java full stack Developer

Location is Chicago IL (5 days onsite)

Job Type: Contract

Duration: Long Term

Banking domain experience is mandatory.

Location Chicago

Exp 8 years plus.

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 / GCP.
• Utilize Docker Kubernetes Helm for containerization and orchestration.
• Build and maintain CI/CD pipelines (Jenkins GitHub Actions Azure DevOps GitLab).
• Implement observabilitylogging monitoring tracingusing ELK Prometheus/Grafana 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.

Required Skills & Experience

Technical Skills

• 510 years of hands-on experience in Core Java (Java 821).
• Advanced-level expertise in Spring Boot Spring Cloud WebFlux Reactive Streams.
• Strong experience building microservices with distributed systems and RESTful APIs.
• Hands-on experience with Kafka (producers consumers streams schema registry).
• Solid knowledge of Cassandra with performance tuning and data modeling.
• Front-end development experience using React / Angular / Vue.
• Strong understanding of concurrency multithreading and non-blocking programming models.

Cloud & DevOps Skills

• Experience working with AWS Azure or GCP cloud architectures.
• Proficiency with Docker Kubernetes Git CI/CD pipelines.
• Understanding of distributed tracing observability service mesh is a plus.

Soft Skills

• Strong analytical debugging and problem-solving skills.
• Excellent communication and teamwork abilities.
• Self-driven and capable of leading full-stack solutions independently.

Preferred Qualifications

• Knowledge of Kafka Streams ksqlDB or event-driven microservice patterns.
• Experience with GraphQL API Gateways (Kong Apigee or Spring Cloud Gateway).
• Cloud or Java certifications (AWS GCP OCI Java K8s).
• Prior experience with serverless or micro-frontend architectures.