Fintech Software Developmentfor products that move real money, in real time

ShubhDigi's fintech practice is deliberately scoped: we build the consumer-facing payment products—UPI apps, digital wallets, BNPL checkout, neobanking layers, and payment SDKs—that founders and product teams ship to end users. This is distinct from our NBFC lending platform work and our core banking system integration work, which live under their own dedicated practices. If your project is about underwriting a loan book or integrating with a bank's core ledger, those are different conversations; this page is about the product your customers actually open on their phone to send money, top up a wallet, or check out with buy-now-pay-later.

UPI is where most consumer fintech products live or die on reliability. A payment button that spins forever, a transaction that debits but doesn't confirm, or a mandate that silently fails erodes trust in seconds—and trust is the entire product in payments. We architect UPI integrations around the real failure modes: network timeouts, duplicate submissions, delayed NPCI callbacks, and partial mandate failures, so your app tells users the truth about their money instead of a spinner that never resolves.

Digital wallets carry a specific engineering discipline: the wallet balance a user sees must always match a defensible, reconciled ledger, not a cached number that drifts from reality. We design double-entry ledger architectures that reconcile automatically against UPI settlement data, card network files, and BBPS biller confirmations, so a support agent can explain exactly where every rupee in a wallet came from and where it went—without a engineering escalation.

Neobanking product layers face a different trap: shipping something that looks like a bank app but feels like a thin skin over someone else's infrastructure. We build the product experience—onboarding, spend insights, card controls, support flows—with the same care as the underlying banking-as-a-service integration, because customers judge the app they use every day, not the sponsor bank's API documentation behind it.

BNPL and payment SDK products live or die at the moment of checkout. A BNPL decision that takes eight seconds loses the sale to a shopper who has already moved on; a payment SDK that requires three days of merchant integration work loses the partner to a competitor's one-line snippet. We engineer these products for the specific speed constraints of the moment they operate in—instant eligibility checks, drop-in SDKs, and settlement flows merchants can trust without calling support.

We stay engaged after launch because fintech products live under continuous scrutiny: NPCI specification updates, card network rule changes, and evolving RBI guidance on wallets and payment aggregators all require the platform to adapt without a rebuild. Our engagements are structured so your team owns the product and the roadmap, with ShubhDigi as the engineering partner that keeps the payment layer reliable as you scale.