Senior Connex Developer

Help keep New Zealand transacting — and shape the future of an essential national platform.   Worldline NZ (formerly Paymark) is New Zealand’s leading electronic payments provider. Every day, millions of Kiwis rely on us to make secure, seamless purchases—anywhere, anytime. With 29 billion transactions processed across 120,000+ merchants, our Connex platform is the powerhouse that keeps commerce flowing across the country.   Because HP NonStop Connex expertise is extremely rare in New Zealand, we are actively seeking exceptional talent based in NZ OR Australia.   Why this role matters Our Connex team is the core of our transaction processing capability—delivering major system upgrades, platform enhancements, and mission‑critical functionality that keeps New Zealand transacting without interruption. As a Senior Connex Developer, you’ll play a pivotal role in enhancing and modernising the systems that underpin the country’s payment ecosystem.   Bring your rare expertise to a team that values it Bring your rare HP NonStop Connex skills to a high‑performing team that’s excited to welcome talent from both Australia and New Zealand — including those ready for a fresh start across the Tasman.   What you’ll be doing In this hands‑on senior development role, you’ll: -Implement new software features and maintain existing mission‑critical codebases -Follow and improve development workflows, documentation and processes -Perform peer and formal code reviews -Develop and execute unit tests to ensure functionality and performance -Take part in architectural discussions as part of the Connex architecture group -Support solution design and contribute to pre‑sales technical discussions -Report on progress, incidents and development efforts regularly -Ensure alignment to Worldline’s SDLC and development framework.   What you’ll bring We’re looking for someone who thrives in complex, high‑availability environments and brings deep, proven HP NonStop expertise.   You must have: -Extensive Guardian administration experience -Strong expertise in Guardian HPE NonStop design & development -Proficiency with TAL, native TAL, COBOL, TACL and C -Pathway knowledge (essential) -Strong understanding of algorithms, libraries, SQL and TCP/IP -Experience with intercept processing (e.g., DRnet, SecurDPS) -Understanding of at least one HSM vendor i.e. Atalla -Experience providing 2nd and 3rd level support -Excellent communication, problem‑solving and stakeholder skills. -Experience with high‑volume, high‑availability EFT or transaction processing systems -Previous work in payments or financial switching environments.   What you can expect from your team You’ll join a collaborative, supportive Core Switch team with deep platform knowledge and strong relationships across Technology, Product and Sales. Many team members have grown through the business, bringing rich domain expertise and a customer‑centric mindset.   Why join Worldline? You’ll enjoy: -Bonus potential -A strong rewards and recognition programme -A people‑first culture with genuine flexibility and trust.   Proudly recognised as a: Top Employer, Great Place to Work and Winner of Small Workplace of the Year at the HeadFit Awards!   Ready to bring your expertise to a platform that powers a nation? If you’re an experienced HP NonStop Connex specialist—based in Australia, New Zealand, or ready to relocate—we’d love to hear from you.   Apply now and help shape the future of payments across Aotearoa.