Participated in project estimation, technical planning, architecture discussions, and code reviews.

Owned backend database design and third-party integrations, ensuring maintainability and long-term scalability of solutions.

Initiated and drove adoption of a reusable backend boilerplate template, improving development consistency, accelerating project delivery, and helping onboard new developers.

FinTech Investment Platform

• Implemented B2B advisor functionality scope allowing advisors to manage client portfolios and create hierarchical investment models with customizable inheritance rules.
• Implemented KYB verification flow via WebID provider.
• Refactored KYC module and integrated Fourthline verification provider.
• Designed and implemented scalable notification infrastructure supporting email, push, localization, scheduling, tenant-specific customization requirements.
• Built analytical data pipelines using PeerDB and ClickHouse for business analytics statistics dashboard.

Car Dealer App (AI features)

• Developed backend services for vehicle listings, dealerships, geolocation search, chat functionality, and advanced filtering.
• Implemented AI-powered search that converts natural language user requests into structured search filters understood by the backend.

Education Platform

• Designed backend architecture and database schema from scratch.
• Implemented Stripe payments for courses, memberships, and event tickets.
• Built QR-based lesson attendance tracking.
• Developed study progress calculation logic with reward and discount rules.

Hazard Reporting Platform (Microservices Architecture)

• Microservices-based backend (3 services)
• Google Maps API + PostGIS for geospatial data and real-time maps.
• Redis queues for async processing.
• Generation of PDF hazard reports.

Online Medical Platform

• Integrated PayPal payments and pharmacy stock ordering.
• Integrated Google Meet API for secure video consultations.
• Built complex scheduling appointment system (recurring slots, exceptions, day-offs).
• Implemented prescription workflow with multi-doctor approval.

Anti-Snore Mobile App

• Refactored critical core logic causing incorrect exercise generation.
• Replaced Redis-based solution with optimized SQL queries.
• Reduced infrastructure costs and simplified data consistency.

Social network with streaming functionality for artists

• Built a social network platform with an admin panel for artists to schedule and host public or private paid online events for users.
• Designed complex SQL queries for calendar logic with recurring workday slots.
• Integrated FFmpeg for video processing (cropping, generating short clips).
• Implemented real-time chats.
• Used AWS S3 service for store full stream video file.
• Developed a notification module (email, push notifications) triggered by various events.

• System and database architecture development.
• Develop REST API Nest.js server.
• Built CI/CD pipelines, Docker for deploying.
• Used Firebase and others for implement user authorization, push notifications & email notifications.

• Implement REST API server with microservices and payment of site services using Node.js.
• Designed and constructed web user interfaces and visual elements using Vue.js.
• Developed full functionality dynamic and interactive websites using JS frameworks.

• Developed full functionality dynamic and interactive websites using WordPress & JS frameworks.
• Fixed bugs from existing websites and performance