Senior Software Engineer - Connex

Title and Summary

Senior Software Engineer - Connex Senior Software Development Engineer

Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.

We are seeking a talented Senior Connex Software Development Engineer to join our dynamic, cross‑functional team, working within the SAFe methodology. This is an exciting opportunity to contribute to the advancement of payment technologies.

• Participate in team prioritisation discussions with Product and Business stakeholders. Estimate and take ownership of delivery tasks—including design, development, testing, deployment, configuration and documentation—to meet business requirements.
• Automate the build, operation and running aspects of software development and testing.
• Drive code, design and process trade‑off discussions within the team as needed.
• Report on status and manage risks within the primary application or service.
• Drive integration of services with a focus on the customer journey and experience.
• Perform demonstrations and acceptance discussions when interacting with Product Owners. Understand operational and engineering experiences and actively work to improve experience and metrics within the area of ownership.
• Develop a complete understanding of end‑to‑end technical architecture and dependency systems.
• Drive the adoption of technology standards and opinionated frameworks, and review coding, testing and automation work of team members.
• Mentor and guide new and less experienced team members. Identify opportunities to improve overall processes and eliminate waste.
• Share and seek knowledge within the Guild or Programme to drive reuse of patterns, libraries and practices, thereby enhancing productivity.
• Contribute to the test strategy across projects, including BDD‑style functional, system integration and non‑functional testing such as volume, performance, resilience and availability.
• Design innovative test scenarios to uncover potential issues that may not be immediately evident to others.
• Lead online real‑time transaction switching and ATM acquiring testing activities across multiple platforms.
• Set up, maintain and execute test automation frameworks across various application platforms.
• Identify opportunities for test automation, prioritising automation efforts based on risk assessment throughout the delivery lifecycle.
• Ensure traceability from business requirements to acceptance criteria is established and demonstrable from the inception of the project.
• Drive innovation in automation across all application tiers, including UI, APIs, CLIs, Connex, HP Non Stop and database layers.
• Investigate and resolve technical issues reported by the customer support team.
• Bring experience in building comprehensive test scenarios and acceptance tests, collaborating within an iterative deployment environment.

• Highly experienced in Connex on HP Non Stop development.
• Understanding of financial industry hardware such as ATMs, HSMs, HP Non Stop and related standards and security requirements, including PCI and OWASP.
• Excellent understanding of online transaction processing, including knowledge of ATM transaction processing.
• Experience with TCP/IP and communication protocols.
• Strong knowledge of TAL, COBOL, SCOBOL and TACL.
• Understanding of EMV and chip‑and‑PIN technology.
• Knowledge of HP Non Stop protocols, security and utilities.
• Strong understanding of financial industry protocols including ISO
  8583, ISO
  20022, LIS5, VISA, Master Card or ATM message protocols.
• Knowledge of Golden Gate, Electronic File Transfers, Java, UNIX, Spring, Hibernate and XML.
• Proven development experience and a solid background as a developer across various platforms.
• Proven technical testing experience within Agile…