Urgent Hire for---Connex Payment Switch with Java---Chicago IL (Onsite)

Key Responsibilities

• Design, develop, enhance, and maintain applications built on the Connex Payment Switch platform.
• Develop and support payment transaction processing for credit, debit, ATM, POS, and digital payment channels.
• Build scalable backend services using Java and related technologies.
• Integrate payment switch applications with external banking and payment networks.
• Troubleshoot production issues, perform root cause analysis, and implement permanent fixes.
• Collaborate with product owners, business analysts, QA teams, and architects throughout the software development lifecycle.
• Participate in code reviews and ensure adherence to coding standards and best practices.
• Optimize application performance, scalability, and reliability.
• Support production releases and participate in on-call support as required.

Required Skills

• 8+ years of hands-on Java development experience.
• Strong experience with Connex Payment Switch development and support.
• Excellent knowledge of Core Java, Java 8/11/17, Spring Boot, and Microservices.
• Experience with REST APIs and enterprise integration patterns.
• Strong understanding of payment processing systems and transaction lifecycle.
• Experience with ISO 8583 messaging standards.
• Knowledge of EMV, card payments, ATM/POS transaction flows.
• Experience with Oracle, SQL Server, or PostgreSQL databases.
• Hands-on experience with Git, Maven/Gradle, Jenkins, and CI/CD pipelines.
• Familiarity with Linux/Unix environments.
• Strong debugging and production support skills.

Preferred Skills

• Experience with cloud platforms (AWS preferred).
• Docker and Kubernetes/OpenShift experience.
• Kafka or other messaging platforms.
• Exposure to Agile/Scrum development methodologies.
• Knowledge of payment security standards such as PCI DSS.
• Experience working with financial institutions or payment processors.

Qualifications

• Bachelor's or Master's degree in Computer Science, Engineering, or a related field.
• Strong analytical and problem-solving skills.
• Excellent verbal and written communication skills.
• Ability to work effectively with globally distributed teams.