At a shop counter, the customer wants one thing: for the payment to go through. Victor Zheng has spent a career considering everything packed into those few seconds. The bank. The terminal. The software connecting it to the till. The business owner who will later need to make sense of the day’s transactions. A small machine can contain a rather crowded commercial argument.
Zheng is the CEO and co-founder of mx51, which supplies payment technology to banks and other payment providers. Its work can appear under a customer’s branding. That gives his story an unusual quality: a successful encounter with his company’s software need not introduce you to his company at all. The payment provider keeps the familiar name. Zheng’s business supplies part of what makes the experience work.
For a founder, this is an interesting bargain. Recognition comes through the organisation buying the technology, while the shopkeeper judges its usefulness at the counter. Zheng’s route to that bargain ran through the banking system itself. He understood the institution on one side of the transaction before setting up a company to help it serve the other.
A banker crosses the counter
Before mx51, Zheng held senior roles at Westpac Group, including head of payments and head of transaction banking and deposits. He later served as co-CEO of Assembly Payments. His background covers more than two decades in financial services, technology, and payments, with work in product development and project execution across the Asia Pacific region.
There is a practical pairing in his education, too: a bachelor’s degree in information systems from the University of New South Wales and an MBA from Macquarie Graduate School of Management. The technology and the organisation both belong in the picture. A checkout improvement has to work as software, but somebody also has to buy it, introduce it, and support it.
mx51 became a separate business in May 2020, spinning out of Assembly Payments. Its earlier development had been connected to Westpac. Zheng explained the separation in terms of focus: Assembly had distinct businesses, including marketplace payments and a white-label platform. Separate entities could have dedicated management and pursue their own growth.
That explanation has the appeal of an untidy desk finally being sorted. It also matters commercially. A product developed with one bank could become a business serving others. The experience accumulated inside an existing relationship now had a route to a wider market.
A business first, titles later
One of the more revealing episodes came after the spinout. Magnus Hsu and Steven Hadley were formally appointed co-founders after the company had already raised its A$25 million Series A. They had worked with Zheng at Assembly Payments and contributed to the business before the titles caught up.
Hsu helped develop the route to market. Hadley created the prototype underpinning the technology. The division of labour offers a useful corrective to the solitary founder portrait: someone must work out how a product reaches customers, and someone must make the product exist.
“Companies typically don’t appoint co-founders after they’ve raised millions”Victor Zheng, on recognising his founding colleagues
Zheng explained that building the business had taken priority over the formalities. The resulting decision acknowledged contributions already made. It is an unusually concrete piece of a leadership story: a title attached to work, rather than work promised by a title.
The episode does not require an invented boardroom scene to be interesting. Its sequence is enough. Build, secure investment, recognise the people who built. Founding stories tend to be tidied into a single beginning. This one leaves the seams visible.
The logo belongs to somebody else
Zheng’s commercial approach rests on a similar willingness to let another organisation occupy the foreground. mx51 supplies a white-label platform. A bank or acquirer can offer its capabilities to merchants under its own name, retaining the relationship while improving what that relationship delivers.
In 2020, Zheng described the platform as gateway agnostic, sitting above a bank’s existing systems. Westpac offered the technology through Presto. The arrangement allowed new merchant-facing capabilities to connect with infrastructure already in place. It is easy to announce a fresh start; connecting the fresh start to the working system is a more demanding assignment.
A conceptual view of the commercial model, not a transaction-routing diagram.
By 2022, Zheng was publicly warning that technology companies were moving beyond payments into services traditionally associated with banks. His concern was the merchant relationship. If another provider becomes the place a business owner turns for daily tools, that provider also gains an opening for the next service.
He argued that banks needed a more connected set of merchant services. That is a view about competition, and also a description of mx51’s opportunity. Better payment processing alone would leave other parts of a merchant’s working day untouched. The useful question was what the business owner could accomplish around the transaction.
The money behind the machinery
The financing arrived quickly after independence. In 2021, mx51 announced an A$25 million Series A, less than a year after the spinout. Acorn Capital, Artesian, Commencer Capital, and Mastercard were named in the round. The company reported that its Westpac launch partnership had helped it process more than A$1 billion in transaction value.
Those are different kinds of numbers. Investment funds the company. Processed payment value describes activity through the platform. Neither should be mistaken for Zheng’s personal wealth, and transaction value is no substitute for revenue. Keeping the distinctions intact makes the growth story more useful.
Round sizes shown to scale. These are company financing figures.
The A$32.5 million Series B followed in July 2022, led by an undisclosed global fintech investor, with existing investors participating. By that announcement, mx51 said its global headcount had doubled to more than 100. Its stated plans included Australian expansion, international growth, and further work on in-store payments, online payments, and merchant dashboards.
Zheng’s explanation tied growth to the company’s bank partnerships and its attention to the merchant experience. Capital was intended to extend a working proposition. The interesting tension remained: move quickly enough to improve the product while meeting the expectations of institutions that must keep it running.
Trust has a job to do
For Zheng, serving banks makes trust part of the product. In mx51’s announcement about SOC 2 Type 2 certification, he connected data protection with the customer’s reputation. A payment provider buys software, but it also places part of its standing in the supplier’s hands.
“Bank-grade means we can be trusted by customers”Victor Zheng, on the responsibility behind the technology
The certification announcement covered mx51’s product features and systems, including integrations, dashboards, and services around payments. It also described an existing PCI DSS Level 1 certified cardholder data environment. These are concrete pieces of the company’s security work. They help explain what sits behind a phrase that could otherwise float past as sales language.
In his reflections on the payments market at the end of 2021, Zheng also stressed the combination of ease of use with stability and trustworthiness. That combination explains the appeal of partnering with established financial institutions. A pleasant interface has to survive contact with the obligations behind it.
There is little theatre in that requirement. Reliability generally receives its applause in silence. Nobody at the counter wants an absorbing account of how the system was built. They want their payment accepted and their afternoon returned to them.
The next conversation at the counter
The work becomes easier to picture through mx51’s merchant dashboard. It gives payment providers a portal through which merchants can view transactions and other business information in near real time. It can connect multiple payment sources and support self-service tasks. For the owner, the point is having fewer places to look and fewer reasons to call for help.
The in-store offering addresses the link between a point-of-sale system and the payment terminal. That link is a modest-sounding task with a clear place in the working day. When the systems connect, the counter staff can get on with serving the customer. Integration earns its keep in the ordinary repetition of the job.
Disputes add another part of the picture. A transaction can require attention after the customer has left, and mx51 offers tools for managing that work. Seen together, the terminal, dashboard, and dispute services give Zheng’s argument a practical shape: the payment experience extends beyond the moment a card is presented.
In 2024, mx51’s collaboration with Commonwealth Bank brought Smart Sync and Smart Dash into the story. The products combined integrated payment processing with transaction information and insights. It was a further expression of the same approach: a bank’s relationship with merchants supported by technology built with an outside partner.
Zheng’s stated ambition includes scaling in Australia and entering more markets. The company’s name keeps the day-to-day assignment close: “mx” stands for merchant experience. An expanding business still has to justify itself to the person trying to finish a sale, find a transaction, or close the books.
That is where his career comes back together. The former bank executive, the Assembly Payments leader, and the mx51 founder all meet at the same counter. His company’s name may remain behind the scenes. If the work succeeds, a business owner has a little less to think about - a respectable ambition in an industry very good at giving people more.