Description: A B2B SaaS platform streamlining company incorporation, compliance management, and document organization for startups and service providers.

Technologies: AWS, GCP, MongoDB

Responsibilities:

• SaaS Migration & Scalability: Led the migration from a single-organization architecture to a Multitenancy SaaS model, enabling a single user account to manage multiple tenancy accounts, significantly boosting platform scalability.
• Authentication & Security: Re-architected the Auth system by migrating to Server-Side HttpOnly Cookies (via Next.js Middleware) to prevent XSS. Implemented a locking mechanism to resolve refresh token race conditions in multi-tab sessions, ensuring session consistency alongside 2FA integration.
• Transaction Integrity: Developed robust logic for Credit Deduction to manage concurrent payment actions and race conditions, ensuring data integrity for core financial transactions.
• Backend Architecture: Refactored the Assignment Module using Factory Pattern and Dependency Injection to decouple validation logic, adhering to the Open/Closed Principle. Standardized shared logic across entities using Abstract Base Classes.
• Efficiency Tooling: Developed a Browser Extension to facilitate quick data population from Speedydd into external forms, improving user efficiency.
• Invoicing Sub-module: Developed a standalone Next.js/Nest.js app on Google Cloud Run utilizing Cloud SQL and Cloud Storage for financial reporting, streamlined by automated CI/CD pipelines (GitHub Actions).

Description: Multi-platform property management system connecting agencies, landlords, and tenants. Centralized administrative workflows, including property mapping, automated task orchestration, and real-time maintenance tracking. Team size 150+ employees

Technologies: AWS EC2, AI, Clean Architecture, Postgres, Redis, Twilio, Sendgrid, ReactNative

Responsibilities:

• Optimization & Database Tuning: Optimized Contact Module Search and View List (millions of rows) via DB-level tuning, cutting latency from more than 10s to less than 1s.
• Code Base Integration: Developed a robust Google OAuth2 Client Basecode to manage Gmail/Calendar integrations. Implemented Parallel Token Validation and atomic refresh logic to resolve concurrency issues/race conditions, ensuring 100% connectivity reliability for the mailing system.
• Real-time & Data Sync: Built a Real-time Chat Status system leveraging SendGrid Webhooks and engineered a seamless data synchronization pipeline with the Rent Manager provider.

Description: A scalable management platform designed for marketing companies to optimize the field-sales acquisition process.

Technologies: Microservices, NodeJS, NestJS, ReactJS, React Native, Docker, Kubernetes, Gitlab, MinIO, Redis, Kafka, Socket, Postgres, Keycloak

Responsibilities:

• Microservices Foundation: Architected and launched three critical microservices (Auth, Acquisition, Invoice) to establish the scalable core of the management platform.
• Custom Authorization: Spearheaded the integration of Keycloak OIDC flow and developed a proprietary AuthService to enforce granular, business-specific permissions.
• Core Business Logic: Drove the design and implementation of the end-to-end Acquisition Processing flow, encompassing Field Rep management, performance dashboards, and data preparation for invoicing.
• Dynamic Invoicing Engine: Engineered a resilient, event-driven invoicing engine to manage complex, distributed transactions across microservices, leveraging dynamic variables and conditional logic for accurate, automated calculation of complex invoices.

Description: NFC-enabled event management system using wearable technology. Facilitates secure access control, cashless payments, and real-time visitor engagement.

Technologies: Microservices, Kubernetes, GCP, NodeJS, ReactJS

Responsibilities:

• System Maintenance & Development: Maintained and enhanced core RESTful APIs for event configuration and visitor management, ensuring high data accuracy and system reliability.
• Stability: Diagnosed and resolved critical logic errors (bugs), significantly improving application stability and user experience during live events.

Description: A comprehensive trailer rental and management platform.

Technologies: AWS, ReactJS, NestJS, Stripe

Responsibilities:

• Payment & Subscription: Collaborated with a team to define, design, and successfully ship major features. Convert Excel Fee Calculation into Schedule Subscription with Stripe. Communicate through webhook.