• Development and maintenance of high?load backend systems in the fintech domain

• Implementation of new business functionality and support of existing solutions

• Backend development using PHP 7.2+ and Supra Framework

• Design and development of RESTful and HTTP APIs

• Integration with external systems and services (SOAP, REST)

• Integration of multiple payment providers (cards, e-wallets, bank transfers), including Alipay, Neteller,

• Implementation of deposit and withdrawal workflows with payment status tracking and error handling

• Implementation of deposit and withdrawal workflows

• Working with PostgreSQL (queries, optimization, migrations)• Asynchronous processing and messaging using Kafka

• Working with SugarCRM (customization, extensions, API integration)

• Writing data parsers of varying complexity

• Providing production support and troubleshooting

• Confident work in Linux environments

• Version control using Git (Git Flow)

• Designed and developed a production SaaS product from scratch as a solo developer, handling full system architecture, backend logic, and infrastructure setup.

• Built a multi-tenant platform with user registration, authentication, shop and campaign management, and access control.

• Developed subscription-based billing system with payment provider integration, enabling automated payments and self-service subscriptions.

• Implemented API rate limiting and throttling to handle high-throughput requests efficiently.

• Developed background jobs and scheduled tasks (cron) for data processing, campaign updates, and other automation.

• Integrated Redis for caching and request control, Elasticsearch for fast search and analytics.

• Optimized system performance, identified bottlenecks, and ensured stable operation under load.

• Configured and managed VPS and all necessary server components independently, ensuring production-ready deployment.

• Full-stack web development with a focus on backend logic and integrations

• Backend development using PHP 5.6 / 7.x

• Development and support of websites based on CMS: OpenCart, WordPress, OctoberCMS

• Server-side business logic, data processing, and API integrations• Writing custom parsers and data-collection scripts

• SEO-related backend optimizations

• Working with relational databases

• Understanding and application of OOP principles and client-server architecture

• Code refactoring and maintaining code quality

• Development of SPA applications using Angular (9+)

• Cross-platform mobile application development using Angular + Capacitor / Cordova

• Publishing applications to App Store and Google Play

• Projects included marketplace applications and information portals