Senior Java FullStack Developer - W2 & Local to NJ only

Cinergy Technology Inc

Java Full Stack Lead Developer

Location: Jersey City, NJ (Onsite, locals only)

Interview: In-person interview required

Experience: 12+ Years

Role Overview

We are seeking a Java Full Stack Lead Developer with strong expertise in Java, Spring Boot, Microservices, Kafka, PL/SQL, and AWS to design, develop, and lead mission-critical applications. The ideal candidate will bring hands-on leadership, high-throughput application experience, and a strong background in performance optimization, security, and resilient architecture. This is a lead role requiring on-site presence in Chicago and the ability to guide both design and development activities.

Key Responsibilities

  • Lead the design, development, and deployment of microservice-based applications using Java, Spring Boot, and Kafka.
  • Define and implement high-performance, scalable, and resilient application architectures.
  • Ensure best practices in Spring Security for authentication, authorization, and compliance.
  • Architect and optimize Kafka integrations (producer/consumer), ensuring throughput, scalability, and resilience.
  • Drive database interaction, query optimization, and transactional management using PL/SQL.
  • Oversee AWS deployments, ensuring reliability, performance, and cost-effectiveness.
  • Conduct performance optimization at JVM, Spring Boot, and database layers.
  • Enforce high standards of code quality, problem-solving, debugging, and best practices.
  • Collaborate with product owners, architects, and cross-functional teams to deliver business-critical solutions.
  • Mentor and guide junior developers, fostering a culture of technical excellence.
  • Evaluate and leverage GenAI productivity tools where applicable to improve development workflows.

Required Skills & Experience

  • 12+ years of professional software development experience with progressive leadership.
  • Expertise in Java, Spring Boot, and Microservices design and implementation.
  • Proven experience in Kafka (integration, performance, scalability, error handling, resilience).
  • Strong PL/SQL experience (query optimization, transactional management).
  • Hands-on AWS exposure (Lambda, S3, RDS, EC2, or related services).
  • Proven track record in high-throughput, large-scale application development.
  • Strong background in performance optimization (JVM tuning, database tuning, Spring Boot profiling).
  • Solid understanding of security practices (Spring Security, role-based access, OAuth, JWT).
  • Excellent architecture and design expertise for enterprise-grade applications.
  • Strong problem-solving, debugging, and code review skills.
  • Experience with GenAI productivity tools for code generation, optimization, or testing is a plus.

Eligibility

  • Must be a local candidate to Chicago, IL (no relocation).
  • Must be willing to interview in-person.

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