Senior Engineering Leader | 10+ Years Building Scalable Systems

Key Achievements & Impact:
- Payment Optimization: Improved payment success rates by 40%, resulting in $500K+ additional annual revenue
- Gateway Integration: Led integration of 10+ payment gateways (Stripe, PayPal, Square, etc.) processing $5M+ in transactions
- Performance Enhancement: Reduced payment processing latency from 3s to 800ms, handling 5000+ concurrent transactions
- Fraud Prevention: Implemented 3D Secure 2.0, reducing chargebacks by 65% while maintaining 95% approval rate
- Global Expansion: Enabled expansion to 15 new markets with multi-currency support (25+ currencies)

Technical Leadership:
- Architected microservices-based payment orchestration platform with intelligent routing
- Implemented event-driven architecture for real-time payment tracking and reconciliation
- Built comprehensive payment analytics dashboard improving decision-making by 60%
- Mentored 3 junior developers in payment systems best practices

Technologies:
- Backend: Ruby on Rails, Node.js, GraphQL, REST APIs
- Frontend: React.js, TypeScript, Redux
- Payments: Stripe, PayPal, Square, Braintree, 3DS 2.0, PCI DSS
- Cloud: AWS (EC2, Lambda, RDS, S3, SQS, CloudFormation)
- Tools: Docker, Kubernetes, Redis, PostgreSQL, Elasticsearch

Responsibilities:
- Course Development: Designed and taught courses focused on mobile application development using Android, React Native, iOS, and Flutter.
- Practical Learning: Emphasized hands-on experience in the classroom, guiding students through the process of building fully functional mobile applications.
- Remote Teaching: Delivered lectures and workshops remotely, utilizing interactive methods to engage students in virtual settings.
- Mentorship: Provided one-on-one support to students, helping them troubleshoot and optimize their projects.

Technical Skills:
- Mobile App Development (Android, iOS)
- Cross-Platform Frameworks (React Native, Flutter)
- Remote Education Techniques
- Student Guidance and Project Mentorship

Responsibilities:
- Cloud Migration: Led the migration of on-premises infrastructure to AWS, leveraging services like EC2, RDS, S3, CloudFormation, NAT, and Route 53.
- Web and Mobile Development: Developed scalable web applications using Ruby on Rails, React, and Vue.js, alongside mobile apps for Android and iOS (Swift/Objective-C).
- Scripting and Automation: Implemented automation scripts using Python for data processing and system integrations.
- API Integration: Engineered and maintained robust APIs (REST and SOAP) to facilitate seamless communication with external services.
- Payment Solutions: Integrated multiple payment gateways to enhance the user experience and streamline transaction processes.
- Database Management: Optimized database performance using MySQL, SQL Server, and PostgreSQL.
- Team Leadership: Supervised and mentored multiple development teams, driving productivity and delivering high-quality software solutions.

Technical Skills:
- Ruby on Rails, React JS, Vue.js.
- AWS (EC2, RDS, S3, CloudFormation, NAT, Route 53).
- Python for scripting and automation.
- API development and integration (REST and SOAP).
- Payment gateway integration.
- Database management with MySQL, SQL Server, PostgreSQL.

Responsibilities:
- Full Stack Development: Led the development of web and mobile applications using .NET, iOS, and Android technologies.
- Project Management: Managed analytics and project delivery timelines, ensuring successful implementation of software solutions.
- Team Leadership: Supervised and mentored 5 teams, guiding them through project milestones and defining software architecture.
- Cloud Expertise: Intermediate knowledge of Azure services, including Azure Repos, Pipelines, Artifacts, and Boards.
- Agile Practices: Acted as SCRUM Master, implementing agile methodologies to optimize development cycles.
- Software Architecture: Played a key role in defining software architecture strategies to enhance scalability and performance.

Technical Skills:
- .NET Web Development
- Mobile Development for iOS and Android
- Azure DevOps (Repos, Pipelines, Artifacts, Boards)
- Agile Methodologies (SCRUM Master)
- Team and People Management

Responsibilities:
- Diverse Project Development: Developed a wide range of projects using technologies such as Android, iOS, Ruby on Rails, PHP, and Python.
- Client Interaction: Engaged with international clients to deliver tailored software solutions that meet specific business needs.
- End-to-End Delivery: Managed the full software development lifecycle, from concept to deployment, for various custom projects.

Technical Skills:
- Mobile Development (Android and iOS)
- Full Stack Development (Ruby on Rails, PHP, Python)
- Client Communication and Project Customization

Responsibilities:
- Web Development: Designed and developed custom web applications using Ruby on Rails.
- Mobile Development: Built and optimized mobile solutions for Android platforms.
- Collaboration: Worked closely with stakeholders to ensure that the solutions aligned with business objectives.

Technical Skills:
- Ruby on Rails Web Development
- Android App Development
- Requirement Analysis and Stakeholder Engagement

Responsibilities:
- Web Application Development: Developed custom websites using the Yii PHP Framework.
- Mobile Solutions: Implemented Android applications to complement web functionalities.
- System Optimization: Focused on optimizing performance and user experience in developed applications.

Technical Skills:
- Yii Framework (PHP) Development
- Android Mobile Development
- Performance Optimization

Responsibilities:
- Full Stack Development: Led the development of custom web applications using Symfony PHP framework.
- Mobile Application Development: Enhanced web projects with Android mobile app integration.
- Agile Approach: Applied agile development methodologies to accelerate project delivery.

Technical Skills:
- Symfony Framework (PHP) Development
- Android App Integration
- Agile Development Practices

Responsibilities:
- Laboratory Management: Oversaw the setup and maintenance of laboratory equipment for computer science courses.
- Teaching Support: Assisted professors in delivering lectures and practical sessions, providing guidance to students.
- Student Mentorship: Guided students in their academic projects, fostering a deeper understanding of computer science concepts.

Technical Skills:
- Laboratory Equipment Management
- Academic Mentorship
- Teaching Assistance in Computer Science