Jeff Chambers and the Customers Who Bought In

A bank has several ways to say it likes your software. It can renew the contract. It can recommend you to another bank. It can also buy a stake in your company, which makes the next conversation about the product roadmap rather more personal. Jeff Chambers has been having that third kind of conversation at Lumin Digital.

In July 2026, Lumin announced more than $115 million in new capital and a $1.6 billion valuation. More than $70 million came from 15 client investors. For Chambers, the founder and chief executive, the interesting detail was who had written the checks: institutions already acquainted with the product, the implementation and the people answering their questions.

That is a useful place to begin his story. A valuation tells you what investors agreed a company was worth at a particular moment. Customers becoming shareholders tell you something about the relationships a founder has spent years constructing. They have had an opportunity to inspect the plumbing.

An engineer with a finance degree

Chambers studied at California State Polytechnic University, Pomona. His degree was in investment and corporate finance, a detail that sits pleasantly beside his own account of his professional instincts. “By training and passion, I’m an engineer,” he said in 2025. The balance sheet and the underlying machinery have both figured in his career.

In 2000, he co-founded Architect Digital Banking. In 2013, he joined Alkami as chief operating officer. Those roles placed him inside the business of making financial institutions work through a screen, then inside the operations of another company supplying that experience.

The succession is revealing. Chambers kept returning to a familiar problem while the technology around it changed. By 2016, he saw an opening to build a banking platform for the cloud from the beginning. He founded Lumin that year, bringing experience from earlier products to a company with a fresh technical starting point.

For the people using a banking app, architecture is rarely the attraction. They want to move money and carry on with their day. For the institution offering it, the architecture determines how readily tomorrow’s request can become a working feature. Chambers’s career had brought him to the place where those two expectations meet.

The first yes came from Kalamazoo

Lumin’s early backing came from PSCU, now Velera. Chambers described being given the resources and freedom to assemble experienced developers and start with a clean sheet. The team studied the technologies behind Amazon, Netflix and Google as it worked on personalization. The ambition was to bring more responsive digital experiences into banking.

A clean sheet is enjoyable until somebody has to use what is written on it. In January 2019, Consumers Credit Union in Kalamazoo, Michigan, was announced as Lumin’s first credit union partner. The agreement covered retail and business banking on desktop and mobile. Consumers’s leadership pointed to both the technology and an existing trust in the people building it.

That early decision helps explain why Chambers’s story is about relationships as much as software. A financial institution choosing a new platform also chooses a team it will depend on. The demonstration ends; the relationship continues through launch, support and the next round of changes.

Consumers reappears later in the story. In March 2025, it was one of five institutions named to Lumin’s new Member Advisory Committee following investment from the client community. The early customer had acquired another way to help guide the company.

The organization is part of the design

Ask Chambers about innovation and the answer soon reaches the people doing the work. His description of Lumin’s operating approach emphasizes openness, cooperation and authority flowing upward from employees close to a problem. Lumin’s stated working practices include distributed decision-making, feedback and room for experimentation.

There is an engineering logic to this. If a useful observation has to climb several flights of management before somebody can act, the organization has introduced its own delay. Distributing authority asks more of individual judgment. It also gives people a reason to exercise it.

In a 2025 conversation on the FinTech Cowboys podcast, Chambers made the difficulty sound suitably unglamorous: “But the execution is what’s really hard.” Banking has plenty of problems to discuss. The work is getting people to solve them together and keeping that arrangement productive after the initial excitement subsides.

“But the execution is what’s really hard.”

Jeff Chambers / FinTech Cowboys, 2025

His reading provides another clue. During Lumin’s early years, he read Simon Sinek’s Leaders Eat Last and The Infinite Game. He has said they influenced how the company was built. When a conversation with Sinek was announced for Lumination 2026, Chambers described an ambition to create an enduring, respected organization larger than its founders.

A book can supply a vocabulary. The test arrives when a team disagrees with its leader, a client needs help or an appealing sales opportunity exceeds what the company can deliver. Chambers’s public philosophy places those daily decisions inside the design of the business.

Patience acquires shareholders

Money can alter that design. In December 2024, Lumin announced growth financing led by Light Street Capital, NewView Capital and Partners Group. The round, initially announced at more than $160 million, was subsequently reported as $170 million. The company said revenue had grown more than 60 percent over the preceding year.

Then came the March 2025 announcement of more than $75 million in client investment. More than 20 client partners participated. BCU, Redwood, Wings, Consumers and Summit credit unions were named to the advisory committee. The customers had become participants in the company’s financial future, with a formal route for strategic guidance.

Chambers has credited Velera’s early patience with giving Lumin time to build. The later ownership structure brought that institutional backing together with growth investors and clients. Each group enters with its own responsibilities; alignment is work that has to continue after the financing announcement.

The advisory committee is a useful detail here. Its members included institutions with different histories and constituencies, all using Lumin in their own operations. A founder hearing from that group has to consider the product as it is experienced outside the company. The committee creates a place for those conversations to recur, even as the investor list and the product agenda expand.

The relationship also reached the boardroom. Mike Valentine, the outgoing BCU chief executive and a longtime Lumin client, joined as an independent director effective October 1, 2026. Chambers described him as someone he had learned from over the years. Experience on the customer’s side of the table had become part of the company’s governance.

A longer list of promises

By 2026, the product agenda had widened. In May, Lumin unveiled Solaire, an intelligence layer embedded in its platform. The company said AI-enabled tools for marketing, service workflows and member support had begun reaching clients in December 2025. Further conversational and proactive capabilities remained on the roadmap.

Earlier product decisions had already put the question of usage in the foreground. In October 2024, Lumin reported a 77 percent digital banking adoption rate among its clients and more than 3.5 million hours of monthly use across its application. Numbers like those describe repeated encounters with a product. They also explain why changing it requires care: the audience is already there, using familiar routines.

The distinction between something available and something promised matters. A roadmap is a declaration of where engineering time will go. At Lumination, Lumin also previewed expansion into CRM, lending, payments and service, with client advisory groups contributing to the strategy. These plans extend the responsibilities of a company that began with digital banking.

October brought a more everyday example: the commercial launch of Lumin Signal. It combines behavioral analytics with in-app guides and surveys, helping institutions see where people abandon a process or overlook a feature. A bank can have a useful capability that customers never discover. Software occasionally needs better directions.

Signal arrives with banking terminology already applied across more than 100 pages and 700 features. That detail fits the sort of work Chambers is describing: removing preparatory chores so a client can begin examining the experience itself. Guides and surveys sit beside the analytics. The institution can identify an awkward step, offer some help and ask what happened. Each improvement may be small enough to escape a keynote while still saving somebody time.

These developments return Chambers to the kind of problem he has spent his career addressing: how to make a financial institution’s intentions usable. The growing list of capabilities increases the importance of execution. A unified system still has to deliver each individual task.

The ordinary Tuesday test

Chambers’s long view comes with a very short interval of judgment: the next time somebody opens the app. In his July 2026 account, more than eight million people were using Lumin-powered banking. He reported weekly additions to the platform and a client Net Promoter Score of 94. Those are company-reported measures of a business built over a decade.

The human stakes are less abstract. An institution wants its members to stay. Its employees want tools that make service easier. The person holding the phone wants the transaction to work. A founder building for that chain of expectations has to keep returning to details that rarely make a financing headline.

Chambers now has customers with another reason to pay attention to those details. Some own a piece of the company. The relationship began with a decision to trust its software; it continues with an interest in what the business becomes. The next ordinary Tuesday will give everyone another opportunity to see how the work is going.