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AI Development for Fintech

Woltrio builds fintech software with compliance designed in from the first sprint: payments and embedded finance, AI fraud detection, KYC and AML automation, lending decisioning and open banking integrations. We work with fintech startups and financial teams across the US and UK on $5,000 to $150,000 engagements, building products and modules on top of licensed infrastructure rather than multi-year core banking programs.

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What We Build

Financial software where correctness is not negotiable: money that balances, decisions that can be explained, and an audit trail for everything.

Checkout and payout flows, wallets, card issuing, subscriptions and double-entry ledgers, built on Stripe, Adyen or a banking-as-a-service provider so you ship a financial product without becoming a bank.

Compliance Is Not a Phase at the End

Compliance and security consume 30 to 40 percent of a typical fintech budget, and retrofitting it costs an estimated 5 to 20 times what building it in would have. That single multiplier decides more fintech project outcomes than any technology choice, so it shapes how we architect from day one.

Double-entry ledgers and reconciliation

Money movement recorded as immutable double-entry postings with idempotent transactions and automated reconciliation, because a ledger that does not balance is a problem no amount of AI will fix later.

PCI DSS scope minimization

Tokenization and hosted fields so raw card data never touches your servers. Shrinking the cardholder data environment is the cheapest lever available on an assessment that runs $50,000 to $200,000 at Level 1.

SOC 2 and audit readiness

Access control, change management, encryption and evidence-producing audit logs built in as you go, so your SOC 2 Type 2 assessment is a review of what already exists rather than months of remediation.

Explainable models for regulated decisions

Credit and risk models that can state why they declined an applicant, with model risk documentation and monitoring. A black box that cannot produce an adverse action reason is not deployable in lending.

False positives as the real AML cost

Most AML programs drown in alerts that go nowhere. We tune detection against your own confirmed outcomes and add risk-based triage, so analyst hours go to the alerts that matter.

The infrastructure we build on

Stripe, Adyen, Marqeta, Unit and Treasury Prime, Plaid, TrueLayer and Tink, ComplyAdvantage and Alloy, on Postgres and event streaming, with the Anthropic and OpenAI APIs where AI earns its place.

Why a Boutique Fintech Partner

Fintech builds run $20,000 to $300,000 and up, from roughly $80,000 for a basic payments app to over $2 million for a full digital bank. Certification sits on top of that and is not development spend: SOC 2 Type 2 typically $40,000 to $120,000 initially with $30,000 to $60,000 a year to maintain, PCI DSS Level 1 $50,000 to $200,000, and full multi-state money transmitter licensing in the US routinely past $1 million. We say that plainly because being surprised by it late is what kills fintech budgets. Woltrio works at $5,000 to $150,000 on compliant MVPs, specific modules, AI risk layers and integrations over licensed infrastructure. We build the software; you or your BaaS and sponsor bank partner hold the licenses.

Fintech startups building a compliant MVP or first productSaaS platforms adding embedded payments, payouts or cardsLenders modernizing decisioning, servicing and collectionsCompliance teams buried in false-positive AML alertsFinancial firms integrating open banking and account data

Our Development Process

  1. 01

    Defining Scope & Specification

    First, we define the project goals, target audience and user cases which helps us develop a Software Specification (SFS). Preparing an SRS ensures clear expectations and that everyone is on the same page before we start prototyping.

  2. 02

    Creating Prototype

    The second step involves developing an initial version of the app to visualize UI/UX and core functionalities. We then gather feedback, make adjustments and lock in on a prototype for development.

  3. 03

    Development Services

    It is time to choose the right tech stack and implement user-facing features with optimized performance. We ensure UI/UX feasibility, validate inputs and collaborate with other team members to achieve the best results.

  4. 04

    Quality Assurance & Testing

    Identifying and fixing bugs is crucial for customer satisfaction. We achieve this by deploying the solution in a test environment and repeating the process until the app is error free.

  5. 05

    Maintenance and Support

    Launching a product is not the end. We monitor its performance post-launch and fix issues proactively. Support services include applying regular updates and enhancements without compromising functionality.

Frequently
Asked Questions

Seeking basic information? Our FAQ section is a ready reckoner with precise answers to the most probable queries.

How much does fintech app development cost?

Fintech apps generally run $20,000 to $300,000 and up: around $80,000 for a basic payments app, and past $2 million for a full-service digital bank, over timelines of six to thirty-six months. Rates vary widely by region, with US and Western European teams at $150 to $250 an hour. Woltrio delivers at $5,000 to $150,000 by scoping to a compliant MVP, a specific module or an AI risk layer rather than a full platform.

Do we need a banking license, or can we use banking-as-a-service?

Most companies should start with banking-as-a-service. Providers such as Unit, Treasury Prime and Marqeta let you launch accounts, cards and payments under a sponsor bank's license, which removes the largest regulatory barrier and the capital requirement. Pursue your own license only when volume makes the economics work or when the regulated activity itself is the product. Note that full multi-state money transmitter coverage in the US regularly exceeds $1 million.

How much does fintech compliance actually cost?

Compliance and security together typically consume 30 to 40 percent of a fintech budget. SOC 2 Type 2 commonly costs $40,000 to $120,000 for the initial assessment plus $30,000 to $60,000 annually, and PCI DSS Level 1 assessments run $50,000 to $200,000 depending on scope. Each certification also carries two to four months of remediation work if the groundwork was not laid during development.

When should compliance work start?

Before the first line of production code. Industry estimates put reactive compliance at 5 to 20 times the cost of building it in from the start, because retrofitting means re-architecting data flows, access control and logging in a system already carrying real customer money. Compliance-by-design is not diligence theatre here, it is the cheapest path to the same certificate.

Can AI be used for credit decisions and AML monitoring?

Yes, with explainability as a hard requirement rather than a nice-to-have. Lending decisions must be able to produce an adverse action reason, and models need documented risk management, monitoring and human review of edge cases. In AML, machine learning works best layered over rules: rules catch the known typologies, models surface the abnormal behaviour humans and static thresholds miss.

How do you reduce false positives in fraud and AML monitoring?

By tuning against your own confirmed outcomes instead of vendor defaults. We feed back confirmed fraud, cleared alerts and filed reports so thresholds reflect your actual customer base, add behavioral and network signals that static rules cannot see, and apply risk-based triage so low-risk alerts are handled proportionately. The measure that matters is analyst hours per confirmed case, not raw alert volume.

Do you build on Stripe and Plaid, or from scratch?

On top of them, in almost every case. Rebuilding payment processing, card issuing or bank data aggregation from scratch adds cost, risk and regulatory surface for no competitive gain. The value is in what sits above: your ledger, your risk logic, your onboarding experience and the workflows specific to your business. We build from scratch only where the existing rails genuinely cannot do what the product requires.

AI Development for Fintech.

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Powering Your Solutions With

Python
Selenium
React Native
HL7 FHIR
Flutter
TypeScript
Flutter
Python
Selenium
React Native
HL7 FHIR
TypeScript
Python
Selenium
React Native
HL7 FHIR
Flutter
TypeScript
Flutter
Python
Selenium
React Native
HL7 FHIR
TypeScript