Mastercard

Senior Software Engineer - Connex

Harrogate, England, United Kingdom

Senior

ON SITE

Mastercard's Vocalink division is hiring a Senior Software Engineer specialising in Connex on HP NonStop platforms, based in Harrogate, England. The role sits within a cross-functional team working under the SAFe agile methodology and focuses on online real-time transaction switching, ATM acquiring, and payment infrastructure. You will own delivery tasks end-to-end—design, development, testing, deployment, and documentation—while also driving test automation, mentoring junior engineers, and contributing to the broader engineering guild. Strong knowledge of TAL, COBOL, SCOBOL, TACL, ISO 8583...

Connex

HP NonStop

TAL

COBOL

SCOBOL

TACL

ISO 8583

ISO 20022

ATM transaction processing

TCP/IP

EMV / Chip and PIN

BDD / Cucumber / Gherkin

Selenium

Test automation

PCI DSS

OWASP

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