A multi-currency wallet for cross-border payments
A wallet people abroad use to pay for services back home: top-ups and withdrawals, payments through aggregators, identity checks, limits and referrals.
Task, solution, architecture and a result with a number, for every project.
No product name and no site address appears in any of these case studies. Some of the work was commissioned and we do not publish client names. Some of it belongs to payment projects that prefer quiet. The task, the architecture, the stack and the result stay where they are, and that is the part a technical buyer reads.
More than half of these projects are no longer running, and the reason is not technical. They were our own products, and they ran out of money for promotion rather than out of engineering. A client buys the ability to build a system, not somebody else's marketing, which is why closed projects sit here alongside live ones.
Range
The run does not break for a single year from 2014 onwards. Each period below is named after what showed up in it for the first time.
A handicraft store taking international cards and shipping abroad, a store for digital goods, corporate sites for a training centre and an investment firm, and the first messenger bots.
Billing for an e-wallet, an online identity verification service, foreign services paid with local cards, an aggregator pulling data from many independent sources, and a delivery map for a manufacturer.
Flight tickets paid with local cards, a network of self-service terminals accepting banknotes, delivery and taxi bots, online stores with stock control, and a prototype for ordering bank cards online.
A payment institution licensed by the central bank, a merchant platform with dozens of systems connected, a subscription platform for an expert, and corporate sites for manufacturers.
A student forum split by region, university and faculty. A program for the chip inside a wastewater sensor, which is not web work at all but hardware. A store for an occupational safety company.
A classified ads aggregator with a language model in the processing pipeline, an adaptive testing SaaS, a five-language content platform, a CRM for online sales, and our own knowledge base with a team of AI specialists in it.
A wallet people abroad use to pay for services back home: top-ups and withdrawals, payments through aggregators, identity checks, limits and referrals.
Dealers take payments for services through providers, earn commission or rewards, and work in strictly isolated tenants. Integrators get a public JSON-RPC interface.
A legacy core of one hundred and thirteen tables that we maintain, and a new system with balances, user-to-user deals and identity checks.
The twenty case studies above are the projects with a technical story behind them. Here is the rest of what we can still name, one line each, newest first. Client names and site addresses are left out for the same reason as in the case studies.
Tell us about the task. We will study it and propose an option that makes sense technically and economically.
We reply within one business day · Telegram @sbunyod