ROVQIX builds fintech web products — customer dashboards, onboarding and KYC flows, payment integrations and marketing sites — with authorisation enforced at the data layer, full audit logging, idempotent money movement and the documentation your security reviewers will ask for.
In fintech the interesting engineering is not the interface. It is making sure a retried request does not charge twice, that two concurrent operations cannot spend the same balance, and that every action is reconstructable afterwards.
Money operations
Every state change
Security questionnaires
Kept minimal
Balances and limits handled with database-level guarantees, not read-modify-write patterns that lose updates.
Idempotency keys on every creating request, so a network retry cannot produce a duplicate transaction.
Immutable records of who did what, when and from where — the first thing any reviewer asks to see.
Multi-step flows with document upload, verification provider integration and clear status communication.
Stripe, Adyen and similar, with webhooks handled idempotently and reconciliation built in from the start.
Architecture notes, data flow diagrams and control descriptions your reviewers and enterprise customers will request.
Lost updates under concurrency, duplicate operations from retries, and state changes nobody can reconstruct afterwards.
-- Wrong: two concurrent requests both read 100 and both write 20
SELECT balance FROM accounts WHERE id = $1;
UPDATE accounts SET balance = $2 WHERE id = $1;
-- Right: atomic, and the affected row count tells you if it succeeded
UPDATE accounts SET balance = balance - $2
WHERE id = $1 AND balance >= $2;No, deliberately. We integrate payment provider elements so card details never touch your servers, which keeps your PCI scope at the lowest practical level.
We implement and document the technical controls auditors look for — access control, logging, change management, encryption. The policy, evidence collection and audit itself sit with you and your compliance platform or auditor.
Heavily, with unit tests on every calculation and edge case, concurrency tests on balance operations, and reconciliation checks against the payment provider in staging before launch.
Yes to both. We routinely complete vendor onboarding, security questionnaires and background verification for financial services clients.
Indicative ranges in USD. Every engagement is quoted to a written scope before work starts, so the number you approve is the number you pay.
$3,000 – $7,000
1–2 weeks
Best for: Preparing for a customer audit or raise
$20,000 – $70,000
10–20 weeks
Best for: Dashboards, onboarding and payment products
from $4,000 / month
Ongoing
Best for: Continuous delivery with compliance pressure
How we think about this work, in more depth.
Fintech
A 30-minute call, then a written proposal with scope, price and timeline within two to three working days. No retainer required to get a real number, and no obligation if the answer is that we are not the right fit.