Avenryx SystemsTeams
Hire fintech developers with regulated-product experience
In fintech the hard part is not the feature. It is proving afterwards exactly what happened, in what order, to whose money. Engineers who have lived through an audit build differently.
Outcomes
- Immutable audit trails from the first release
- Reconciliation designed in, not bolted on
- Regulatory questions answered with evidence
- Fewer production incidents involving money
Teams
Where it is used
Payments integration
PSPs, ledgers and settlement handled correctly under retry.
Lending and onboarding
KYC, scoring and decisioning with a defensible record.
Compliance remediation
Closing findings from an audit or regulator review.
What we deliver
- Double-entry ledger design
- PSP and open banking integration
- KYC/AML workflow
- Idempotent transaction handling
- Audit and reporting
Who this is for
- Payment, lending and finance-operations teams needing engineers used to money-critical code.
- Companies integrating payment providers, ledgers or banking data.
When this is the wrong choice
- Projects seeking a regulatory licence route — we build software, not licensing.
- Work where auditability and reconciliation are considered optional.
Problems this solves
Money does not reconcile
Double-entry ledger design, idempotent operations and daily reconciliation are the baseline, not a later hardening phase.
Provider integrations are fragile
Webhook verification, retries, replay safety and sandbox-backed tests prevent silent payment failures.
Audit trail missing when needed
Immutable event history with correlation IDs makes every balance explainable after the fact.
Architecture and integration
- Append-only ledger with derived balances rather than mutable totals.
- Idempotency keys on every externally triggered operation.
- Segregated access for operations, support and engineering.
- Encrypted storage with documented retention for personal and payment data.
How delivery runs
- 01
Money model
Accounts, entries, currencies and rounding rules defined before any feature work.
- 02
Integration design
Provider capabilities, sandbox access and failure behaviour mapped up front.
- 03
Build with reconciliation
Every flow ships with its reconciliation report.
- 04
Controls review
Access, approvals, logging and retention reviewed before go-live.
Realistic timeline
Weeks 1–3
Money model and integration design.
Weeks 4–12
Core flows with reconciliation in place.
Weeks 13–18
Controls, monitoring and go-live.
What moves the price
Number of providers
Each payment or banking provider brings its own sandbox, edge cases and settlement behaviour.
Currency and settlement scope
Multi-currency with FX and settlement timing is materially more complex than single-currency.
Compliance evidence
Documentation, access reviews and audit support are real engineering time.
Where projects go wrong
Rounding and currency errors
Minor units only, explicit rounding rules, and property-based tests on monetary arithmetic.
Untested failure paths
Provider timeouts, duplicates and partial failures are tested deliberately, not discovered live.
FAQ
Questions buyers ask
Do you hold financial licences?+
No. We build the technology; regulatory permissions remain with you or your sponsor.
Can you work under our SOC2 or ISO controls?+
Yes, including background checks and restricted-access environments.
You already have the idea. Let's define what comes next.
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