Payment API Integration and Automation

Integrated a payment API client with a Telegram chat-bot, enabling 500 users to initiate over 300 payments daily.
Developed backend Django ORM logic to automatically generate and persist more than 10,000 payment records annually.
Implemented a cron-based scheduler for payment status updates, achieving synchronization latency under 2 seconds.
Ensured 99.9% accuracy in payment status tracking, reducing payment dispute cases by 40%.

Iaroslav worked on this case as the Python Developer at PeoplePro Tech.

Python Developer

Automation

Backend Development

Payment Integration

Fintech

Global

Growth

Payment Processing System

Web App

Python

PostgreSQL

Django

Telegram Bot API

B2C

Iaroslav

Full-Stack Web Developer

Iaroslav's cases

PWA Development

Full-Stack Development

Engineered 6 SPAs, 3 MPAs, and 3 PWAs in React/Vue with Redux/Vuex, serving 25K monthly users.
Built 35+ REST endpoints in Node.js/Express & Django DRF, using semantic versioning to cut breaking changes by 80%.
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Established CI with ESLint/Prettier and Jest/Cypress coverage at 88%, slashing post-release bugs by 60%.
Optimized lazy loading, tree-shaking, and code-splitting for a First Contentful Paint <1.2 s on 95% of page loads.

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Resolved a PC-specific page-update failure affecting 100% of Windows users, restoring full functionality.
Standardized FAB icon dimensions to 48×48 px across 8 Brand Hero pages, achieving 100% visual consistency.

Flutter DeveloperSelfPrivacy

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Payment Processing System

Payment API Integration and Automation

Integrated a payment API client with a Telegram chat-bot, enabling 500 users to initiate over 300 payments daily.
Developed backend Django ORM logic to automatically generate and persist more than 10,000 payment records annually.
Implemented a cron-based scheduler for payment status updates, achieving synchronization latency under 2 seconds.
Ensured 99.9% accuracy in payment status tracking, reducing payment dispute cases by 40%.

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