Fintech software development for real-time trading & payments
We engineer production-grade trading platforms, payment systems and neobank cores. SOC 2 certified. Sub-millisecond latency. Built to scale to millions of users.
From order book to ledger — engineered end-to-end
Off-the-shelf fintech rarely survives contact with regulators, scale or your roadmap. We build custom systems from the matching engine up — event-driven, audit-logged, compliance-ready, and tuned for the throughput your business actually demands.
- Real-time trading platforms (50K+ msgs/sec)
- Payment processing & multi-currency rails
- Neobank cores & ledger systems
- Open Banking, PSD2 & API banking
- KYC/AML & fraud detection pipelines
- PCI DSS Level 1 & SOC 2 compliant
- Capital markets data infrastructure
- Lending, BNPL & credit decisioning
Capabilities
What we build for fintech teams
Real-time trading platform development
Order books, matching engines, market data fan-out, FIX gateways, and trader-facing dashboards. Built on Kafka, Redis Streams and custom low-latency Rust/Go services.
Payment & ledger systems
Double-entry ledgers, multi-currency wallets, reconciliation engines, and integrations with Stripe, Adyen, Modulr, ClearBank, SEPA, FPS and card networks.
Compliance-ready architecture
Field-level encryption, immutable audit logs, segmented networks, evidence-collection automation. SOC 2, ISO 27001 and PCI DSS by default.
Proof
Recent work
Payments
Atlas Pay
50K msgs/sec
Rebuilt their settlement engine on Kafka. Reduced reconciliation lag from 4 hours to 90 seconds.
Trading
Helix Capital
<1ms latency
Built a low-latency order routing layer for institutional FX. Handles 12K orders/sec with deterministic latency.
Core banking
Northwind Bank
Zero downtime
Migrated 1.2M customer accounts from a 30-year-old core to event-driven microservices with no service disruption.
FAQ
Frequently asked questions
Related reading
Go deeper
14 min guide
High Frequency Trading Infrastructure: A Practical Guide
Colocation, kernel bypass, FPGA vs software matching, and the trade-offs nobody publishes.
Read articleCase study
Northwind Markets — sub-100ms trading, Kafka + React
78ms P99 tick-to-screen across 14 venues, 50K updates/sec sustained per terminal.
Read case studyCase study
Atlas Pay — Kafka real-time settlement, 50K msgs/sec
Reconciliation lag from 4 hours to 90 seconds. Zero duplicate settlements in 14 months.
Read case studyReady to build your fintech platform?
Tell us what you're building. We'll come back with a tailored architecture, timeline and fixed quote within 5 working days.