Web App Development · Fintech and banking
Custom Software Development for fintech and banking
Fintech software development services for products that move, hold or lend money, where the system has to prove what happened long after it happened.
Why this is different here
Software where the money path has to be provable
Fintech product work splits in two. The money path, where a ledger, idempotency and reconciliation decide whether the system can explain itself years later, and everything around it, which is ordinary careful product engineering. We build both and we treat them differently, because a mistake in the first is not measured in engineering hours.
What we build
Typical scope for fintech and banking
Ledger and money movement
Immutable double entry records with balances derived, not stored
Idempotent payment APIs
Every money moving endpoint safe to retry, with stored responses
Reconciliation engine
Scheduled matching against provider references, with unmatched items that age and escalate
Onboarding, KYC and KYB flows
The product side of identity, wired to whichever verification vendor you choose
Back office tooling
Screens support can answer from, instead of interrupting an engineer
Regulatory extracts
Scheduled reports that reconcile to the ledger and are produced the same way every time
What the service includes
Web App Development at Voliom
- React / Next.js front ends, server-rendered for speed and SEO
- Node or Python APIs with clean data models
- Auth, roles, teams, billing and admin tooling
- Integrations with the tools you already run
- CI/CD, staging environments and error monitoring
- Documentation and handover to your own team
Systems
What it has to connect to
- QuickBooks integrationREST API via the Intuit developer platform
- Xero integrationREST API with OAuth 2.0
- HubSpot integrationREST API, webhooks and private apps
- ERP integrationREST, SOAP or direct database access, depending on the vendor
FAQ
Common questions
Do you have experience in fintech and banking?
We build operations software for this kind of business, which is a different claim from being a fintech and banking specialist and we would rather make the honest one. What we bring is the engineering and the pattern recognition from similar operations. What you bring is how your plant, depot or site actually runs, because that part is never in a case study.
How do you start on a web app development project here?
Architecture decisions in week one, then a first production money path in eight to twelve weeks, with reconciliation and support tooling before launch rather than after.
What does it cost?
Scope decides it and we quote line by line after a call. Two tracks: a blended squad at roughly $24 to $45 per hour, or a senior-only pod at roughly $75 to $120 where architecture review and a compressed timeline matter. A first project in this space usually runs four to six weeks.
Can you work with our existing codebase?
Yes. We start with a short audit, tell you honestly what to keep and what to replace, then work inside your repository and process.
Keep exploring
More for fintech and banking
- All fintech and banking workBalances are stored and updated rather than derived from a ledger
- AI & Automation for fintech and bankingPut AI where it removes work, not where it looks impressive.
- Dedicated Development Teams for fintech and bankingSenior engineers who join your team, not a black box agency.
- Web App Development overviewFast, maintainable web products that your team can keep building on.
Let's talk
Tell us what you're building.
Get a free 30-minute strategy call. You'll leave with a clear plan, a realistic estimate and our honest opinion, whether or not you work with us.
- Email usmail@voliom.com