Java Backend Developer

We are seeking a highly skilled Senior Java Backend Developer with strong expertise in building scalable, secure, and high-performance applications. The ideal candidate will have hands-on experience with Java, Spring Boot, AWS, Microservices, Kafka, and proven knowledge in the payment's domain. This role involves designing and implementing backend services, optimizing performance, and ensuring reliability in mission-critical payment systems.

Location: Local to Chicago preferred

Key Responsibilities

• Design, develop, and maintain backend applications using Java, Spring Boot, and Microservices architecture.
• Work on payments-related applications, ensuring scalability, reliability, and security.
• Implement parallel processing mechanisms in Spring Boot to improve performance.
• Configure and optimize Kafka in a microservices environment for real-time streaming and event-driven architectures.
• Design and develop secure APIs leveraging Spring Security, ensuring compliance with industry security standards.
• Work with AWS services for backend solutions, including:
• EC2 for hosting and scaling applications.
• SNS & SQS for messaging and asynchronous communication patterns.
• Lambda for serverless workflows and integrations.
• Collaborate with cross-functional teams (frontend, QA, DevOps, Product) to deliver high-quality, resilient applications.
• Troubleshoot and resolve production issues, optimize backend performance, and conduct code reviews.

Required Skills & Qualifications

• 7+ years of hands-on experience as a Java Backend Developer.
• Strong proficiency in Java, Spring Boot, and Microservices architecture.
• Proven experience in the Payments domain, with understanding of transaction flows, security, and compliance.
• Hands-on expertise in AWS services (EC2, S3, Lambda, SNS, SQS).
• Experience with Kafka configuration, real-time streaming, and event-driven systems.
• Strong understanding of API design, scalability, and security best practices.
• Proficiency in Spring Security for authentication and authorization.
• Solid problem-solving, debugging, and optimization skills.
• Experience implementing parallel mechanisms in Spring Boot applications.

Preferred Skills

• Familiarity with CI/CD pipelines, Docker, and Kubernetes for cloud-native deployments.
• Experience with monitoring and logging tools (CloudWatch, ELK, Splunk).
• Knowledge of database technologies (SQL/NoSQL).
• Strong communication skills with ability to work in Agile environments.