Custom Fintech Software Development Services

No, as the agents only read, draft, and explain. Creating a payment, issuing a refund, or blocking an account requires human approval, which is built into the architecture.

The agent touches only data approved for its task. For example, card data stays with the provider, personal data is minimized before it reaches a model, and we can run the whole thing in your own cloud using your own provider keys.

Golden evaluation sets run in CI on every prompt or model change, and a regression blocks the deployment.

All model calls go through one gateway with per-tenant token budgets and rate limits, so a runaway agent hits its budget ceiling.

Yes. We record input, output, model version, latency, and cost per call, and keep the human approval attached to the action it authorized.

We build payment and billing systems, ledgers, financial dashboards, client portals and the backends underneath them, using React, Node.js, Python, .NET and AWS.

Recent work includes Tie's configurable subscription billing system, Bookis's Stripe and Vipps payment flows, and Longtail's airline pricing analytics platform.

We build configurable payment and subscription billing systems and integrate gateways like Stripe, Vipps, and PayPal.

For Tie, we rebuilt the billing subsystem on Salesbricks with a configurable pricing model and migrated active subscribers off Chargify without interrupting billing.

For Bookis, we built Stripe and Vipps payment flows plus a custom scraper that analyses competitor listings to inform pricing.

Yes. We ran both providers in parallel for Tie, verified the data, then switched reads. Active subscribers saw no interruption to their existing subscriptions.

Stripe and Vipps are running in production on systems we built, plus PayPal, local methods and carrier billing where a market needs them. The integration layer is provider-agnostic, so adding or replacing a provider doesn't mean touching product code.

Yes, including BankID in the Nordics. For Bookis, we built BankID digital identification and signature into seller verification, with KYC and AML checks wired into onboarding and an audit trail for each step.

No. We build payment, billing and identity flows inside products, and we integrate with licensed providers. If you need a licensed entity, we'll tell you on the first call.

Security is built in from the start: end-to-end encryption, multi-factor authentication, secure APIs and regular penetration testing. Our information-security management is ISO/IEC 27001 certified, and we architect to meet PCI DSS, GDPR and PSD2 requirements. We integrate KYC and AML providers for identity and anti-fraud checks, with audit logging and role-based access on every build.

We keep card data with the provider and out of your systems, which keeps your PCI scope as small as it can be. We architect to PCI DSS requirements, and we work alongside your QSA rather than replacing one.

Every webhook handler is idempotent because payment providers deliver the same event more than once and eventually deliver one late. We key on the provider's event ID, make retries safe to replay, and alert when an event arrives outside its expected window.

Ledger-first: every movement is recorded as an immutable entry, balances are derived from those entries rather than stored and updated, and reconciliation runs against the ledger automatically. When a number is disputed, you can reconstruct how it got there.

That's a design decision we make with you before the tooling is built. Segregation of duties is wired into internal dashboards from the start: who can issue a refund, who approves it, and who can only read. Every action is logged against the person who took it.

Cost depends on how many payment providers you integrate, how much compliance scope you carry, whether you're migrating live subscribers, and how much internal tooling, finance, and support you need. Our app cost calculator gives you a range in a few minutes. After a brief discovery, we provide a fixed price broken down by module and milestone.

We work in phases rather than quoting a single number, because a checkout integration and a billing migration with live subscribers are different problems.

Discovery comes first, followed by a delivery plan with scope, milestones, and budget for your approval before we start. You see working functionality at each milestone, rather than waiting for a single release at the end.