jStack

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Playbooks for building financial infrastructure

Structured, practical guides covering the architecture, integrations and operating model behind modern payment and wallet platforms.

Featured · Mobile Money

The Complete Guide to Building a Mobile Money Platform

Learn the architecture, integrations, operating components and scalability considerations required to launch modern mobile money infrastructure.

8 chapters · 24 min read

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5 guides

Payments

Payment Orchestration Fundamentals

How to route, retry and reconcile payments across multiple providers without coupling your product to any one of them.

14 min read · Updated July 19, 2026

Infrastructure

Designing a Double-Entry Ledger for Financial Products

A practical guide to account models, balance derivation, holds and multi-currency support in a production ledger.

18 min read · Updated June 27, 2026

Market Expansion

Launching Financial Products in a New Market

Regulatory scope, local rails, settlement partners and operating requirements to assess before committing to a market.

12 min read · Updated June 2, 2026

Stablecoins

Stablecoin Payouts in Practice

What it takes to run stablecoin payouts alongside bank rails: custody choices, confirmations, reconciliation and treasury controls.

11 min read · Updated May 16, 2026

Wallets

Wallet Product Design for Institutions

Account structures, limits, KYC tiers and lifecycle states to define before building an institutional wallet product.

10 min read · Updated April 28, 2026

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