FinStack Global Multi-Currency Payment Engine
High-frequency, real-time distributed settlement ledger processing $2B+ in annualized transactions with sub-50ms gateway latency and strict PCI DSS Level 1 verification.
Engineered an institutional-grade, real-time payment gateway and settlement ledger handling over $2B in annualized transactions with sub-50ms latency and strict PCI DSS Level 1 verification.
Client
FinStack Technologies
Timeline
8 months
Discipline
Custom Software Development & SaaS Product Engineering
Deployment
Cloud & SaaS, Enterprise Platforms
Project Overview
Project Overview
High-frequency, real-time distributed settlement ledger processing $2B+ in annualized transactions with sub-50ms gateway latency and strict PCI DSS Level 1 verification.
Codytics designed and developed FinStack Global Multi-Currency Payment Engine, a high-performance Fintech platform for FinStack Technologies, delivering a comprehensive digital solution across Cloud & SaaS and Enterprise Platforms and Web Apps.
FinStack Technologies is a cross-border financial infrastructure provider powering corporate payroll, merchant acquisitions, and FX remittances across 140+ countries.
Codytics delivered the full platform in 8 months, covering Custom Software Development, SaaS Product Engineering.
An international payments provider needed to scale their settlement engine to accommodate high-frequency merchant transactions across 12 currencies while guaranteeing zero double-spend anomalies.
FinStack Global Multi-Currency Payment Engine was engineered to address these gaps through a workflow-first approach. Codytics designed the platform to optimize the entire operational lifecycle from ingestion to delivery with clarity, resilience, and operational discipline.
The product had strong vision, but the software was slowing the business down.
An international payments provider needed to scale their settlement engine to accommodate high-frequency merchant transactions across 12 currencies while guaranteeing zero double-spend anomalies.
Core ArchitectureLedger Reconciliation Drift
High-frequency concurrent settlement pipelines suffered from race conditions, requiring hours of end-of-day manual ledger audits and reconciliation fixes.
User WorkflowStrict PCI DSS Level 1 Security
Processing credit card tokens and bank rails demanded complete infrastructure isolation, hardware security modules (HSM), and zero-trust audit compliance.
System PerformanceGlobal FX Volatility & Latency
Settlement processing times exceeding 800ms exposed merchants to currency exchange slippage risks during cross-border payout batches.
The Solution
How Codytics solved these problems.
Designed an event-driven Go and Kafka architecture with distributed consensus, active-active PostgreSQL cluster failover, automated fraud risk scoring, and containerized Kubernetes clusters.
Solution 01•Zero-Anomaly LedgerEvent-Sourced Double-Entry Ledger
Immutable append-only transaction logs written to Apache Kafka ensure mathematically provable financial reconciliation with zero floating balances.
Engineered for FinStack Technologies: high-concurrency throughput with resilient real-time failover.
Eliminated operational bottlenecks and established scalable foundations for future growth.
Solution 02•99.999% Fault ToleranceActive-Active Multi-Region Cluster
Geographically distributed CockroachDB and PostgreSQL instances with Raft consensus provide sub-50ms writes and seamless regional disaster failover.
Engineered for FinStack Technologies: high-concurrency throughput with resilient real-time failover.
Eliminated operational bottlenecks and established scalable foundations for future growth.
Solution 03•Sub-15ms ScoringReal-Time Machine Learning Fraud Filter
Microsecond risk scoring engine evaluating device fingerprints, geovelocity, and behavioral heuristics blocks anomalous transactions before settlement.
Engineered for FinStack Technologies: high-concurrency throughput with resilient real-time failover.
Eliminated operational bottlenecks and established scalable foundations for future growth.
Solution 04•PCI DSS Level 1Hardware-Backed Tokenization Vault
Cardholder and banking data tokenized in isolated AWS CloudHSM enclaves, completely segregating PAN exposure from downstream processing microservices.
Engineered for FinStack Technologies: high-concurrency throughput with resilient real-time failover.
Eliminated operational bottlenecks and established scalable foundations for future growth.
Methodology
8 months Modernization Vector
A battle-tested transformation sprint spanning stakeholder research, architectural isolation, token unification, and zero-downtime cutover.
Ledger Architecture & PCI Strategy
Distributed double-entry ledger specifications · PCI DSS Level 1 network topology blueprint · Consensus benchmark proofs-of-concept
Core Go Microservices & Kafka Pipeline
High-frequency settlement engine · CloudHSM tokenization vault · Multi-currency FX pricing router
Extreme Load Testing & Financial Audit
50,000 TPS stress simulation · Chaos engineering partition tests · Independent financial reconciliation audit
Institutional Merchant Migration
Progressive payment gateway cutover · Merchant developer portal launch · 24/7 dedicated SRE support team
UX Foundations
Human-Centered Precision
How we balanced maximum informational density with instant optical parsing under high cognitive pressure.
Command Bar Ergonomics
Global ⌘+K keystroke switcher lets operators execute core actions, query records, and split displays without taking their hands off the keyboard.
Zero-Modal Architecture
Eliminated disruptive floating popups that break operator situational awareness. All contextual actions expand into non-blocking inline side-panels.
Optical Luminance Ratios
Engineered WCAG AAA compliant optical contrast formulas specifically calibrated for bright trading floors and intense daylight environments.
Feature Specifications
Engineered for High-Density Agility
Granular interactive components engineered from the ground up for instantaneous comprehension.
Real-Time Multi-Currency Settlement
Instant foreign exchange clearing and conversion across 12 tier-one global currencies with automated treasury hedging.
Merchant Developer SDKs & Webhooks
Robust REST and GraphQL APIs accompanied by idiomatic SDKs in Node, Python, and Go with resilient webhook delivery retry mechanisms.
Automated Dispute & Chargeback Hub
End-to-end evidence ingestion portal linking directly with Visa Resolve Online and Mastercard dispute APIs to defend merchant revenue.
Institutional Analytics Dashboard
Real-time volume telemetry, settlement breakdowns, interchange fee optimization, and automated accounting export pipelines.
Visual Identity
Style Guide
We use the following colours and typography in development of FinStack Global Multi-Currency Payment Engine.
Plus Jakarta Sans
Aa
ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
Inter
Aa
ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
System Blueprint
Software Topology & Execution Pipeline
Designed an event-driven Go and Kafka architecture with distributed consensus, active-active PostgreSQL cluster failover, automated fraud risk scoring, and containerized Kubernetes clusters.
Event-Sourced Double-Entry Ledger
Immutable append-only transaction logs written to Apache Kafka ensure mathematically provable financial reconciliation with zero floating balances.
Active-Active Multi-Region Cluster
Geographically distributed CockroachDB and PostgreSQL instances with Raft consensus provide sub-50ms writes and seamless regional disaster failover.
Real-Time Machine Learning Fraud Filter
Microsecond risk scoring engine evaluating device fingerprints, geovelocity, and behavioral heuristics blocks anomalous transactions before settlement.
Hardware-Backed Tokenization Vault
Cardholder and banking data tokenized in isolated AWS CloudHSM enclaves, completely segregating PAN exposure from downstream processing microservices.
Validated Impact
Institutional Performance Measured
Post-rollout audit after continuous high-volume production operations.
$0B+
Audited & verified in production.
00.00%
Audited & verified in production.
<00ms
Audited & verified in production.
00+
Audited & verified in production.
“Codytics solved architectural hurdles that three previous consultancies couldn't crack. Their distributed systems engineering delivered a ledger that has processed billions of dollars without a single decimal of drift.”
Alexander Vance
VP of Engineering, FinStack Technologies
Explore Other Case Studies
Transforming High-Frequency FinTech Architecture
A complete modernization of Aura Capital's multi-asset trading desk, replacing a fragmented legacy terminal with a sub-18ms WebAssembly execution core, zero-modal ergonomic design, and unified design token architecture.
MediConnect Telehealth & Patient Care Ecosystem
Built an enterprise-grade, HIPAA-compliant telemedicine platform serving 50,000+ active patients with encrypted real-time video consultations, EHR synchronizations, and intelligent triage.
Have a project in mind? Let's build it together.
Partner with Codytics's elite engineering squad to launch high-performance digital products that scale with your business growth.
