- Payment API Integration: Lead the analysis, design, and development of APIs to integrate with payment providers (VISA, MasterCard) and processors across multiple countries.- Payment & Tokenization Software: Develop and maintain software solutions for the secure processing of payments and tokenized transactions.- Tokenization Security Enhancement: Analysis of tokenization flows to identify and remediate security vulnerabilities, ensuring the highest level of transaction protection.- Custom Tokenization Solutions: Develop backend software to enable tokenized transactions across multiple platforms, including e-commerce, mobile, NFC, and wearable devices.- Certification & Compliance: Integration of documentation and API testing for VISA and Mastercard certifications, successfully allowing tokenization of credit/debit cards via NFC on mobile devices.- Microservices & Real-Time Event Architecture: Design and Implement a microservice architecture with real-time event processing to enable cross-team collaboration and enhance security validation for tokenized transactions.- Agile Project Leadership: Define project priorities, identify critical issues and translate them into user stories and small actionable tasks, ensuring efficient project execution.- Monitoring: Create real-time metrics, monitoring systems, and alerts to provide business stakeholders with actionable information about transaction processing.- Cross-Functional Collaboration: Collaborate with diverse teams to design and implement solutions that optimize payment and transaction flows.- Mentorship & Knowledge Transfer: Actively mentor and share technical expertise with junior developers, helping them with their professional growth and development.

- Lead a team of software engineers to complete large-scale and small-scale projects for clients.- Provided mentoring and advice to junior software engineers on the team.- Used agile methodologies to manage complex projects, communicating with clients and upper management to define software requirements and determine timelines and budgets.- Oversaw software development and coded profitable apps using Java and NodeJS languages.- Design software to meet user requirements, using collected data, bug reports and systems analysis.- Test, install, analyze and debug software and provide documentation, analysis and recommendations on policy changes to clients.- Responsible for a fintech back-end application that calculates and processes electronic transactions and hard cash for more than 5 thousands stores in 3 different countries every day.