Seypro engineers regulated financial systems — trading and order-management connectivity, real-time settlement, KYC/KYB/AML onboarding, and the reconciliation infrastructure that surfaces mismatches before they hit a client statement. We built and run the platform behind MERJ Exchange, a national securities exchange: multi-tenant, audit-grade, zero critical incidents across 18 months of production.
The receipts
Case study · In production
Multi-asset. Multi-tenant. Audit-grade. Equities, bonds, and tokenized securities on a single platform. Regulator-facing since day one. We embedded as the technical partner — not a vendor shipping tickets — and shipped to production weekly with full regression and penetration testing on every release.
Engineering teardowns
A regulated system is not one that never has problems. It is one where problems are caught, diagnosed, and closed before a client, a regulator, or a board meeting finds them first. These are anonymized incident teardowns from live production work.
On a live securities exchange we operate, a symbol-mapping mismatch between two subsystems meant trades were filling but wallet postings were silently failing. We detected the discrepancy, built a live converter, and closed the gap before it reached a single client statement.
A market-data feed was dying silently for ~24-hour windows. The failure had been attributed to network issues for months. We traced it to a stuck connection-state flag in the feed process that the reaper logic never cleared. One targeted fix; recurring incident closed.
Unbounded market-data streams in Redis had no retention cap, and production memory was filling incrementally. We trimmed gigabytes to under 300 MB live and shipped a producer-side cap to prevent recurrence — zero downtime, zero data loss.
What we build
Not a capabilities menu — the parts a regulator, auditor, or board actually inspects, engineered as one cohesive platform.
Order management systems, execution connectivity, real-time market data, and broker/venue integration. Built on FIX protocol. Tested under production load.
Real-time settlement, custodial accounting, and reconciliation logic that surfaces mismatches before they reach a client statement. Every transaction is traceable.
End-to-end onboarding flows with identity verification, AML screening, sanctions checks, and audit trails on every action — built to the controls a regulator inspects.
Message queues with failover, idempotent processing, encrypted data exchange, and the monitoring that proves uptime. ISO 27001-grade controls on production systems.
When something goes wrong in a regulated system, every hour of ambiguity has a cost. We diagnose at the source-code level — not by restarting services and hoping.
Automated reconciliation jobs that diff what the platform says against what the counterparty says — and surface the delta before a human has to find it manually.
“They didn’t just build what we asked for — they challenged our assumptions and delivered something better. Zero critical incidents in over a year of production.”
Who calls us
CTO / Head of Engineering
You need an exchange or settlement engine built right, not bolted together from vendor SDKs that fail during reconciliation.
Head of Compliance
Your regulator is asking how your audit trails work. You need an engineer who can answer at the source-code level, not just show them a PDF.
Fintech Founder
You are raising or going live in a regulated jurisdiction and need a technical partner who has already cleared this bar — not a team learning fintech on your budget.
