Money math has to be exact
Rounding, currency handling, and reconciliation are unforgiving, and a ledger that drifts erodes trust with users and partners. We build transaction systems with ledger integrity designed in, not patched on.
002Fintech Software Development
Fintech software development with compliance built into the architecture
Webisoft builds fintech products that move real money without incident: payment systems, digital banking platforms, trading tools, and the compliance workflows around them.
Our senior Montreal engineers design for PCI DSS and SOC 2 environments from the first commit: ledger integrity, audit trails, and access controls as architecture, not afterthoughts.
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When to bring us in
Signs your fintech product needs a senior engineering team
Financial software punishes shortcuts harder than any other category: money math has to be exact, regulators expect evidence, and every integration is a dependency you answer for. Here are the situations where an engagement with us pays for itself:
A compliance audit is on the calendar
PCI DSS assessments and SOC 2 audits want evidence in the systems themselves: access controls, encryption, and logs that reconstruct events. Software built for audit passes it; software patched for audit fights it.
Transaction volume is outgrowing the stack
What worked at launch strains as volume grows: queues back up, reconciliation windows stretch, and incidents multiply. We re-architect for the volume you are heading toward, without pausing the business.
Banking and payment integrations multiply
Processors, banking partners, KYC vendors, and data providers each bring their own API, sandbox, and failure modes. We build an integration layer that keeps each one replaceable instead of load-bearing.
Fraud and risk checks are manual
Reviews queue up, rules live in analysts' heads, and growth multiplies the backlog. We build risk workflows that automate the clear cases and route the ambiguous ones to humans with full context.
A prototype needs to become a product
The demo that raised the round was built for speed, not for money movement at scale. We harden it, or scope the rebuild honestly, the same way our MVP development work plans for what comes after launch.
The Webisoft advantage
What our fintech software engagements include
(5)- 1
Compliance-grade architecture
PCI DSS scoping, SOC 2 control alignment, encryption in transit and at rest, and least-privilege access are architectural decisions made at the start, because bolting them on later means rebuilding under audit pressure.
- 2
Ledger integrity by design
Double-entry patterns, idempotent money movement, and reconciliation jobs are built into the core, so the books balance by construction rather than by monthly heroics.
- 3
Audit trails on every state change
Every balance change, permission grant, and configuration edit is logged and reconstructable, which is what regulators, partners, and your own incident reviews will ask for.
- 4
Written, executable deliverables
Architecture decisions, integration contracts, and control mappings are documented so your compliance team, your partners, and any future engineers can verify how the system works.
- 5
Diligence-ready engineering
We build to the standard investors and acquirers check for, the same standard our technical due diligence practice applies when assessing other teams' fintech codebases.
