➤ ./webnuvexa --vertical fintech
Loading double-entry ledger▒
Scheduling reconciliation...
✓ Idempotency keys on every posting
✓ Audit stream append-only
✓ Reconciliation exceptions queued
Awaiting regulatory perimeter▒
// Industries / Fintech & Financial Services
Money movement where the ledger has to be right.
Immutable double-entry records, scheduled reconciliation with real exception handling, KYC and monitoring workflows integrated properly, and audit trails that survive scrutiny. Built inside the perimeter your counsel and regulator set.
The Problems We Actually Get Called About
Fintech engineering problems are rarely about features. They are about correctness, traceability and the cost of a bad hour.
Money Moves Twice
Retries, timeouts, at-least-once delivery from providers. Without idempotency keys and enforced uniqueness, a customer gets debited twice and it becomes a regulatory conversation.
Mutable Financial Records
Editing a posted transaction destroys the audit trail. Corrections have to be reversals and new postings, in a system that can prove the original history.
Reconciliation Is A Spreadsheet
Matching provider settlements by hand at month end does not scale and does not scale safely. Breaks need to be a queue someone works, not a file someone opens.
KYC As An Afterthought
Identity verification, sanctions screening and ongoing monitoring have to be designed into onboarding, not bolted on after the first compliance finding.
Unknowable Regulatory Perimeter
Whether you are a regulated entity depends on what you actually do with the money and with the customer. That classification drives architecture, and it is a legal determination.
Vendor Review From Your Buyers
Enterprise and institutional customers security-review every supplier in the chain. Vendor risk review is a launch dependency, not an admin task.
What We Build Here
The ledger and the audit stream are the load-bearing parts. Everything else is arranged around them.
BUILD: Ledger And Movement
Immutable postings with balanced entries, reversal-not-delete corrections, idempotent payment endpoints, multi-provider orchestration with routing rules, and reconciliation services with an exception queue.
DESIGN: Regulated Flows
Onboarding and KYC journeys that collect what is required at the right moment, accessible financial tables, servicing consoles for operations teams, and step-up authentication placed deliberately.
GROW: Pipeline And Trust
Named-account outreach into finance and treasury buyers, educational content reviewed by your compliance function, and search visibility for the integration questions your prospects ask before they buy.
Constraints And Where We Stop
This section is deliberately blunt. Fintech compliance is not something a development studio can sell you, and pretending otherwise would cost you.
We Do Not Audit Or Certify Anything
WebNuvexa does not perform PCI DSS, SOC 2 or ISO 27001 assessments, penetration tests, regulatory examinations or compliance audits, and we issue no certificates or attestations of any kind. We implement the controls your assessors require and remediate their findings. The attestation is issued to you, by a qualified third party.
We Are Not A Compliance Adviser
Whether your activity requires a licence, and which obligations attach to it, is determined with your legal counsel and your regulator. We do not provide regulatory, legal or financial advice, and nothing on this page should be read as either.
PCI DSS Scope Is Determined Elsewhere
Your PCI DSS scope follows from where cardholder data touches your systems and is agreed with your acquirer and a qualified security assessor. We integrate processors through tokenisation or hosted components to help keep that scope small, and we handle tokens as sensitive data in their own right.
Licensed Activity Is Out Of Scope
If the work involves safeguarding, transmitting or moving money, issuing credit, or giving investment or insurance advice under a regulated authorisation, that authorisation must already exist or be obtained. We do not help a client operate outside a perimeter it does not hold.
Technical Decisions That Matter Here
These are the choices that determine whether your next external review is comfortable or expensive.
Double-Entry By Construction
Every movement is a balanced pair of postings to accounts. The constraint is in the data model and the database, so it cannot be bypassed by a hurried endpoint.
Idempotency As A Hard Constraint
A unique constraint on the idempotency key, enforced by the database. Application-level checks alone fail under the concurrency that matters.
Reconciliation As A Product
A scheduled job with a defined matching strategy, tolerance rules, an exception queue with ownership and ageing, and an append-only record of how each break was resolved.
The Audit Stream Is Separate
Security-relevant events go to their own append-only store with actor, action, target, timestamp and correlation ID. Business tables can change shape; the audit stream cannot.
Keys Stay In Your KMS
We integrate with the key management service you run. We do not hold long-lived signing keys, and key rotation is designed into the release rather than bolted on.
Risk Rules Change Without A Deploy
Sanctions lists, thresholds and scoring rules are versioned configuration with effective dates, so a rule change is reviewable, reversible and auditable independently of a release.
Mapped To Real Services
Every capability below is an existing WebNuvexa service page.
➤ Custom Software — Ledger services, reconciliation jobs, settlement and exception handling.
➤ API Development — Versioned money-moving APIs with idempotency, rate limits and documented contracts.
➤ Web Development — Servicing consoles, back-office tools and partner integration surfaces.
➤ SaaS Development — Multi-tenant platforms where each customer entity has its own data boundary.
➤ Legacy Modernization — Core banking and mainframe-adjacent estate migration without a feature freeze.
➤ DevOps & Cloud — Key management integration, environment isolation, audit logging and rollback.
➤ AI Development — Transaction monitoring models and document extraction, with evaluation and guardrails.
➤ Chatbots & Assistants — Support deflection for status, reconciliation queries and account questions.
➤ UI/UX Design — Onboarding and KYC flows that collect what is required without leaking sessions.
➤ Design Systems — Dense, accessible financial tables and forms used across every internal team.
➤ Product Strategy — Pricing, packaging and sequencing decisions with the regulatory perimeter in view.
➤ Fractional CTO — Architecture review and technical direction for regulated delivery.
➤ AI Search Optimization — Making your documentation and product answers findable and citable.
➤ Content Marketing — Educational content produced with your compliance and legal reviewers.
➤ Account-Based Marketing — Named-account pipeline into treasury, operations and finance buyers.
➤ Technical SEO — Documentation and integration portal structure for developer-facing products.
➤ Dedicated Teams — A named pod scoped as a fixed monthly commitment.
➤ Maintenance & Support — On-call coverage, dependency currency and change control under release gates.
Indicative Engagement Shapes
Illustrative fixed-fee phase structures only. Regulated scopes are quoted after a compliance and architecture conversation, not from a form.
Perimeter And Architecture Review
What the product does with money, which obligations your counsel has identified, and what that implies for data, keys, integrations and vendors. Output is a written architecture decision set.
Core Build
The main fixed-fee tranche: ledger and posting model, one or two money-moving paths with idempotency, audit stream, and the reconciliation service.
Assurance Readiness
Dependency inventory, environment and access documentation, change-control and release-gate setup, and a structured handover so your assessors and internal reviewers have what they need.
Controlled Change And Support
A separately priced retainer for change under release gates, dependency currency, incident response and remediation work arising from third-party findings.
Who This Is Not For
The fintech version of an honest no.
No Licence Or Regulatory Strategy
If you do not yet know whether your product needs an authorisation, that is a conversation with a specialist lawyer and your regulator. We are neither, and we will not fill that gap.
Expecting A Certificate From Us
No SOC 2 report, no ISO certificate, no PCI attestation, no penetration test result. We build the evidence; qualified third parties issue the findings.
Trading Or Investment Logic
We do not develop algorithmic trading systems, pricing models or investment advice engines that depend on regulatory licensing reviews we are not positioned to perform.
Undocumented Regulated Product
Building a money-moving product before the perimeter, the licensing position and the reporting obligations are documented produces rework that no fixed fee will absorb.
Building a regulated financial product?
Tell us what the product does with money, where it operates, and what your compliance or legal team has already decided. We will tell you honestly whether we are the right engineering partner.