Senior Java Payment Systems Engineer

Excelon Solutions; Indiana (PA); On-site; USD 150,000 - 190,000; Full time

Job summary

Excelon Solutions is seeking a Senior Java Payment Systems Engineer to design, develop, and support high-volume, real-time payment processing applications. The ideal candidate will have strong hands-on experience with payment switching platforms and enterprise Java development.

This role involves building secure, scalable, and high-performance payment solutions while supporting mission-critical financial transaction systems.

Qualifications

• 8+ years of hands-on Java application development experience.
• Strong experience with payment transaction processing or payment switching systems.
• Expertise in Core Java, Java 8/11/17, Spring Boot and Microservices.
• Experience developing RESTful APIs and enterprise integrations.
• Solid understanding of the payment transaction lifecycle.
• Knowledge of ISO 8583 messaging standards.
• Experience with card payments, EMV, ATM and POS transaction flows.

Responsibilities

• Design, develop and support high-volume, real-time payment processing applications.
• Build secure, scalable, and high-performance payment solutions.
• Support mission-critical financial transaction systems.

Skills

Java development

Payment systems

Core Java

Spring Boot

Microservices

REST APIs

ISO 8583

Card payments / EMV

Job description

Location: Midwest, USA (Onsite presence required)

Duration: Long term contract

Job Summary

We are looking for an experienced Senior Java Payment Systems Engineer to design, develop, and support high-volume, real-time payment processing applications. The ideal candidate will have strong hands-on experience with payment switching platforms, transaction processing, and enterprise Java development.

This role involves building secure, scalable, and high-performance payment solutions while supporting mission-critical financial transaction systems.

Required Skills

• 8+ years of hands-on experience in Java application development.
• Strong experience working with payment transaction processing or payment switching systems.
• Expertise in Core Java, Java 8/11/17, Spring Boot, and Microservices.
• Experience developing RESTful APIs and enterprise integrations.
• Strong understanding of the payment transaction lifecycle.
• Knowledge of ISO 8583 messaging standards.
• Experience with card payments, EMV, ATM, and POS transaction flows.