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01 · Industry

Fintech & Banking

Digital banking, lending, payments, crypto

We build infrastructure for digital banks, lending platforms, payment processors and crypto products. Serious regulation, real money, real audit trail.

Patterns we apply
  1. 01

    Event sourcing for the ledger

    Transactions are immutable events. Current state is computed from events, not from an UPDATE row. The auditor sees full history, nothing is "accidentally deleted".

  2. 02

    Idempotent webhook handlers

    Unique key per event ID, dedup at receive time. The processor can resend the same payment 5 times — the card is debited once.

  3. 03

    Card issuing + crypto wallet

    Wallester for Visa/Mastercard issuing, TRON / TRC-20 for USDT. Master key in a secret provider, not in .env.

  4. 04

    Telegram Mini App for banking

    Banking UI delivered as a Telegram Mini App. Faster adoption than a native app, biometric via web auth, push notifications through Telegram itself.

Projects shipped in this industry
01

Fintech & Banking

Digital banking, crypto, credit management

Telegram Mini App for fiat + crypto banking, end-to-end credit management with mobile client portal. Wallester for card issuing, TRC-20 for USDT.
Relevant services
03

Custom software development

Backends, automations, complex data models
05

API development

REST + GraphQL, OpenAPI, versioning, rate limiting
14

Security & DevOps

Audit, hardening, Okta SSO, SOC 2 readiness
04

Mobile apps (iOS, Android)

Flutter cross-platform or native iOS / Android

Let's talk about your project

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