Fintech Software Development Company
FISTA Solutions is a fintech software development company building payment flows, lending platforms, double-entry ledgers, KYC and AML pipelines, and AI agents for financial operations. Every system is engineered for reconciliation, auditability, and PCI DSS scope control from the first specification onward.
- 150+
- projects delivered
- 50+
- companies served
- 99.9%
- verified uptime
- 47%
- efficiency gains
- 12+
- countries reached
What we build
What does a fintech software development company build?
FISTA builds payment orchestration and checkout flows, lending origination and servicing platforms, double-entry ledgers with reconciliation, KYC/AML and fraud pipelines, customer and back-office portals, and AI agents for disputes, underwriting support, and reconciliation exceptions.
- 01
Payment orchestration
Checkout, tokenization, multi-processor routing, retries, refunds, and chargeback handling designed to keep cardholder data out of your scope wherever possible.
Payments - 02
Lending platforms
Origination, decisioning workflow, document collection, servicing, and collections, with every decision and its inputs recorded for examination.
Lending - 03
Ledgers and reconciliation
Immutable double-entry ledgers, settlement matching, and break investigation tooling — the part fintechs most often discover too late.
Core - 04
KYC, AML, and fraud
Identity verification, sanctions and PEP screening, transaction monitoring rules, case management, and SAR-ready evidence packages.
Compliance - 05
Customer and operations portals
Applicant and customer self-service alongside the internal consoles that operations, risk, and support actually work in all day.
Experience - 06
Financial AI agents
Dispute packet assembly, underwriting document extraction, reconciliation exception triage, and support agents scoped to read-only data by default.
AI
Requirements
Which requirements shape fintech software development?
Fintech systems are shaped by four hard requirements: money must reconcile to the cent, every consequential decision must be explainable after the fact, cardholder and personal data must stay inside a minimized scope, and regulators and partners will eventually ask for evidence.
| Requirement | What it means here | How FISTA builds to it |
|---|---|---|
| Correctness of money | Balances, settlements, and fees must reconcile exactly; eventual consistency is not acceptable for a ledger. | Double-entry ledger with idempotent postings, deterministic reconciliation jobs, and property-based tests on financial invariants. |
| PCI DSS scope | Touching raw card data pulls your whole environment into PCI audit scope. | Tokenization and hosted fields by default, network segmentation, and an architecture review that documents exactly which components are in scope. |
| Auditability | Regulators, partners, and auditors ask what happened, when, and on what basis. | Append-only event log per decision, versioned rule sets, replayable decision inputs, and exportable evidence packages. |
| BSA/AML obligations | Programs need screening, monitoring, case management, and filed reports with defensible rationale. | Vendor-agnostic screening integration, configurable monitoring rules with tuning records, and case management with full investigator history. |
| Availability | Payment and lending flows fail expensively and visibly. | Idempotency keys, circuit breakers and processor failover, queue-based retries, load testing to projected peak, and SLO-backed monitoring. |
Where AI fits
Where do AI agents fit in fintech?
AI agents fit fintech where documents, exceptions, and queues pile up: dispute and chargeback packets, underwriting document extraction, reconciliation breaks, AML alert triage, and customer support. Agents prepare and recommend with citations; humans approve anything that moves money or denies a customer.
- 01
Dispute and chargeback agent
Assembles evidence from transaction, delivery, and communication records into a representment packet for an analyst to approve.
- 02
Underwriting document agent
Extracts and normalizes bank statements, tax forms, and pay stubs into structured fields with the source page cited for every value.
- 03
Reconciliation exception agent
Investigates breaks against processor and bank files, proposes the matching entry, and escalates anything outside tolerance.
- 04
AML alert triage
Drafts the first-pass narrative and gathers related activity for an investigator, never closing or filing on its own authority.
- 05
Support and servicing agent
Answers customer questions from read-only account data, with strict escalation rules for anything touching money or account status.
Cost and timeline
How much does fintech software development cost, and how long does it take?
Cost is driven by the number of money-movement paths, integration count, compliance evidence, and the ledger's complexity; timeline by partner onboarding and processor sandbox access. FISTA does not quote blind: the scoping call returns a specification, a phased plan, and an estimate.
The expensive part of fintech is rarely the screens — it is the invariants. A payment flow that works on the happy path can be built quickly; one that survives partial failures, duplicate webhooks, processor outages, and month-end reconciliation is a different scope. FISTA prices those explicitly so you are not surprised by the work that only shows up in production.
Partner timelines usually gate delivery: processor sandboxes, bank sponsors, KYC vendors, and compliance reviews move at their own pace. The discovery sprint maps those dependencies against the build plan so engineering is never waiting on an approval nobody started.
Send the scope you have, even if it is a paragraph. You get a written brief, an architecture sketch, and a phased estimate before any commitment.
Get a scoped quoteDelivery
How does FISTA deliver an industry software project?
FISTA delivers in four gated phases: a discovery sprint that produces the specification and integration map, an architecture and compliance design that names every control, iterative builds demoed weekly on your environment, and a verified release with runbooks, monitoring, and a handover or a managed operations option.
- 1
Discover and specify
Stakeholder interviews, system inventory, data classification, and a written specification with acceptance criteria and a phased plan.
OutputSpecification, integration map, estimate
- 2
Design for compliance
Architecture, data model, security controls, and the evidence plan for any audit, agreed before the first sprint.
OutputArchitecture decision record, control matrix
- 3
Build and demonstrate
Two-week sprints with automated tests, contract tests on integrations, and a demo on your environment every week.
OutputWorking increments in your repository
- 4
Verify and operate
Load, security, and acceptance testing against the spec; release with runbooks, dashboards, and alerting; optional managed operations.
OutputVerified release, runbooks, SLOs
Why FISTA
Why choose FISTA Solutions for fintech software development?
FISTA treats ledgers, idempotency, and evidence as first-class requirements rather than hardening tasks, keeps PCI scope deliberately small, and contracts through a US entity with full IP assignment. AI features ship with citations and human approval gates on anything consequential.
Fintech specifics
- Double-entry ledger and reconciliation designed in from day one, with property-based tests on financial invariants.
- PCI DSS scope minimized by architecture — tokenization and hosted fields before custom card handling.
- Every automated decision is replayable: versioned rules, recorded inputs, and exportable evidence for auditors and partners.
- AI agents in money paths are advisory by default, with human approval required before funds move or a customer is declined.
How FISTA engineers
- Spec-Driven Development: every deliverable starts as a written specification with acceptance criteria, so scope is testable before it is built.
- AI-native delivery: engineers direct coding agents under review gates and evaluation harnesses, compressing build time without loosening verification.
- Official Anthropic partner, with production experience across Claude, OpenAI, Google, and open-weight models, chosen per workload rather than by default.
- One accountable delivery lead, weekly demos on your environment, and code in your repositories from week one.
What you get as a client
- 150+ projects delivered for 50+ companies across 12+ countries since 2017, with 99.9% verified uptime on systems we operate.
- A US entity (FISTA Solutions Inc., Wilmington, Delaware) for contracting, invoicing, and IP assignment, with an engineering center in Faisalabad, Pakistan for cost-efficient senior capacity.
- US business-hours overlap for standups and reviews; written decision logs so nothing depends on a meeting you missed.
- Flexible engagement: fixed-scope build, embedded forward deployed engineers, or a dedicated team that you can scale month to month.
Clear answers
What buyers in this industry ask first.
Straightforward guidance for evaluating scope, fit, and the next step.
01Can FISTA build a PCI DSS compliant payment system?
FISTA builds payment systems that minimize PCI scope by design — tokenization, hosted fields, and segmentation — and documents which components remain in scope. Certification is an assessment of your organization and environment, so FISTA delivers the architecture, controls, and evidence your QSA will examine.
02Do you build the ledger, or integrate a ledger product?
Both are valid. FISTA builds double-entry ledgers when the business model needs custom balance semantics, and integrates a ledger platform when it fits. The decision is made in discovery against your reconciliation, reporting, and regulatory needs, and recorded with its trade-offs.
03How do you handle KYC, AML, and sanctions screening?
Through vendor-agnostic integrations with identity, sanctions, and monitoring providers, plus case management with full investigator history. Rules are versioned and tunable, and every alert keeps the inputs that produced it so decisions can be defended later.
04Is it safe to use AI agents in financial workflows?
Where the agent prepares work rather than authorizes it, yes. FISTA scopes agents to read-only data by default, requires human approval before money moves or a customer is declined, cites sources for every extracted value, and runs an evaluation harness on every change.
05How much does fintech software development cost?
It depends on money-movement paths, integrations, ledger complexity, and evidence requirements — not on screen count. FISTA scopes an MVP or discovery sprint first, so the estimate for full delivery rests on a written specification rather than a guess.
06Who owns the code, and can our auditors review it?
You own everything: code, infrastructure definitions, and documentation are assigned through FISTA Solutions Inc. and committed to your repositories from the first sprint, so your auditors and any future team can review the system in full.
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Related capabilities
Scoped in writing before you commit
Ship fintech that reconciles, explains itself, and survives audit.
Bring the money flow you need built or fixed. The scoping call returns a written specification, a ledger and control design, and a phased estimate.