Company: Payment provider for servicing gaming asset stores (payment for in-game goods and subscriptions), UK/Austria/USA. Startup. In addition to salary, I had 8% options, combined the position of CTO and senior developer.
Responsibilities: product architecture, new features, support, code review of RnD employees, team management.

Company: Public company, one of the World TOP-3 largest providers of international money transfer services.
Responsibilities: new features, legacy code support, bug fixing, code review, product documentation, API development, integration with complex third-party APIs of banks and payment providers in Asia and Africa, decomposition of the monolith into microservices.

Company: Cyprus fintech, payment service orchestrator with elements of payment routing optimization and AI-based fraud detection. Team of 20 people.
Responsibilities: Integration of the reporting microservice based on Google Cloud Platform with the payment core of the system.
Developed Google BigQuery based BI system from scratch.

• Created the backend, REST API, for the transactions monitoring & statistics
• Developed Google DataStore feed preprocessing app
• Developed Google BigQuery data manipulation micro-framework & SDK
• Created full comprehensive system documentation in Confluence

Developed COPLA, COrrespondent PLAtform, giant transactions processing hub with 160 providers in 115 countries.

• Payment gates integration, payment REST API development
• Migration old monolith transactions processing hub to the new .NET Core microservices based solution
• Pre-production procedures, dockerisation, code quality analysis

Company: Industry leader in SaaS products for brokerage and market feed processing, Israel/USA.
Rsponsibilities: New features, legacy code support, bug fixing, product documentation, analytical work on smart risk management algorithms.
a) feature development and product support for LxFeed, a market data feed high-level preprocessing system
b) splitting the LxRisk monolith, a risk management system, into microservices
c) technical debt for the Sirix Server product
Developed LxFeed: smart multi-gates trade liquidity aggregator, LxRisk: intellectual arbitrage, market-maker & risk management system, Sirix server: enhanced MT4/MT5 clone.

• LxFeed development, rates load burst detection, rates conversion, preprocessing & quotes streaming mechanisms
• LxRisk algorithms research and implementation
• Rates processing and open/close trade positions mechanism development

Developing the large KYC docs automatic (AI based) analysis ERP system for the international fraud and money laundering alerts recognizing.

• Artificial Intelligence based tasks & research
• Creating the architecture of the most highloaded parts of the product
• Creating detailed technical documentation in Confluence
• Team-leading, communication with customer

Private payment system with large CRM for compliance & tech support.

• Transactions tracking subsystem development
• REST API & Service Layer development
• UI architecture development, Angular to VueJS migration
• Intensive communications with customer, new features

Trading, e-commerce & investment in crypto platform.