Responsibilities: - Design and develop engineering solutions for payment terminal applications that run across multiple Android-based payment terminal models (Ingenico, PAX, Castles), integrating with multiple host systems using standard protocols (e.g., ISO8583, Web APIs, JSON) and merchant POS systems (ECR – Electronic Cash Register). - Translate user requirements into secure, resilient, and maintainable source code that is properly tested, reviewed, and documented. - Participate in EMV L3 certification processes with international payment schemes such as Visa, Mastercard, AMEX, UnionPay, JCB, and Discover. Experience with PURE kernel is advantageous. - Contribute to the development of test tools and adopt test automation frameworks as part of the development lifecycle. - Collaborate with internal teams (QA testers, POS developers, Support, and Certification team) for SDLC activities, facilitate troubleshooting, and resolve issues in both pre- and post-production environments. - Facilitate external collaboration for application integration support to NETS partners. Requirements: *Education and Experience:* - Degree in Computer Science or related technology disciplines. - Minimum 5 years of proficiency in payment terminal software development and programming experience on embedded POS devices. - Demonstrated expertise in EMV contact and contactless, ISO8583 is mandatory. - Experience on Linux platform for Key Management System integration with HSM is advantageous. *Skills and Knowledge:* - Excellent and strong knowledge of development with experience in various payment implementations and multiple interface protocols (ISO8583, JSON, HEX data format). - Proficient in developing applications using programming languages such as C, C++, Java, and Python. - Familiarity and working knowledge of Git, Ingenico, PAX, Android Studio, Gradle, JAVADoc, Junit, Confluence, and JIRA. - Self-starter, driven, and adaptable individual who thrives in a dynamic and fast-paced environment, with the ability to work independently or as part of a team with minimal supervision.