We are looking for an experienced Senior Software Engineer – Base24-eps Switch Developer to join a high-performing payments engineering team supporting enterprise banking and financial platforms. The ideal candidate will have strong expertise in Base24-eps payment switch development , real-time transaction processing, and HP NonStop/Tandem environments. This role involves designing, enhancing, optimizing, and supporting mission-critical payment switch systems operating in highly available production environments. Requirements Key Responsibilities Design, develop, and maintain Base24-eps payment switch applications and interfaces. Implement and support ISO8583, EMV, POS, and ATM transaction flows . Develop solutions using: TACL TAL SCOBOL COBOL C/C++ Troubleshoot production issues and provide permanent resolutions. Perform performance tuning, system optimization, and capacity planning. Support platform upgrades, migrations, and modernization initiatives. Collaborate with QA, DevOps, and Infrastructure teams for smooth production releases. Ensure adherence to security, compliance, and audit standards. Required Skills & Experience 5–12 years of experience in Base24-eps development and support . Strong expertise in HP NonStop/Tandem systems . Deep understanding of: ISO8583 EMV POS/ATM transaction processing Payment switching systems Experience integrating with: Card schemes Host banking systems Third-party payment processors Strong debugging, troubleshooting, and production support skills. Experience with performance tuning and high-availability systems. Familiarity with CI/CD pipelines and deployment automation. Excellent communication and stakeholder management skills. Preferred Skills Experience with Base24 Classic or other payment switch platforms. Exposure to: HSMs Tokenization Fraud detection systems Risk engines Knowledge of cloud-based payment architectures. Prior experience working with banking or financial services clients is preferred. Suitable candidates with strong Base24-eps and Tandem experience are highly preferred.