Yevhenii L.

Hi, I'm Yevhenii — a full-stack developer specializing in multi-tenant SaaS platforms, from database architecture to production deployment. My current focus is DriveInstructor Pro, a multi-tenant SaaS for driving schools. I designed and built the full system independently: a 22-table PostgreSQL schema with Row-Level Security for tenant isolation, a NestJS backend with Drizzle ORM, a NextJS frontend, Clerk authentication, and reliable deployment on AWS EC2 via PM2. 🔹 Core Expertise: Backend: NestJS, NodeJS, PostgreSQL, Drizzle ORM, Multi-tenant Architecture & RLS. Frontend: NextJS (App Router), TypeScript, React, TanStack Query. Auth & Infrastructure: Clerk, AWS (EC2, RDS), Docker, CI/CD, PM2 pipelines. Real-Time & Integrations: WebSockets, SocketIO, complex third-party APIs, webhook handling, Stripe Connect. 🔹 Featured Projects: DriveInstructor Pro — Multi-Tenant SaaS for Driving Schools Built the platform end-to-end as the sole developer. Implemented strict data isolation using PostgreSQL RLS, built a scalable NestJS backend and NextJS frontend, and established a robust AWS EC2 deployment pipeline. Trulie — SaaS Platform with Partner Ecosystem & Billing Architected and deployed a scalable platform for a creator economy startup. Architecture: Migrated a monolithic app to a NestJS monorepo, including a Discord bot as a standalone microservice. Billing: Built a hybrid monetization system (subscriptions + credit packages) with automated partner payouts via Stripe Connect. Real-Time: Developed a messaging system with cross-device notification sync, file sharing via AWS S3, and role-based access control. CarStitch — E-commerce Platform Built a custom auto accessories store with a tailored CMS, reducing deployment time by 25% through optimized CI/CD pipelines. Thrilla — Job Board Platform (NestJS/TypeORM) Developed core backend features for talent registration and job roles, managing complex TypeORM database migrations for a high-traffic system. 🔹 Why Me? I don't just write code — I think about architecture and business logic. Whether it's designing secure tenant isolation for a SaaS platform, building robust deployments, or integrating complex billing flows, I deliver solutions built to scale. Ready to build your next SaaS or high-load project? Let's talk!