Sebastian Pavel

I’m a self-taught fullstack engineer focused on the TypeScript and Laravel ecosystems, with 5+ years of production experience. I learn by building and I like owning projects end-to-end—from schema design and backend architecture to frontend, deployment, and billing.

In contract work, I architected a Laravel backend for a multi-marketplace unification platform (eMAG, Trendyol, PrestaShop), including a Domain-Driven Design structure across 14+ business domains and a multi-tenant architecture for strict data isolation. I implemented state machine-driven workflows, a ledger-based stock reservation system safe under concurrent writes, and integrations with typed marketplace DTOs via the Saloon HTTP client.

In full-stack roles, I shipped a passenger transport ticketing platform (Laravel + Next.js PWA) processing 500+ ticket sales per day, integrating an ING payment gateway with JWT-secured sessions to protect PII, plus QR code ticket generation, PDF export, real-time bus tracking, and queue-based processing via Laravel Horizon. I also built real-time services and performance-focused Node.js extraction components, including a Koa-based microservice with lower processing latency.

As a sole founder, I built Loguro from scratch—an AI-powered log management SaaS that queries 50M+ logs in under 500ms using a purpose-built DuckDB columnar store. I engineered a high-throughput ingestion pipeline (up to 45,000 logs/sec sustained) and shipped AI root-cause analysis with Anthropic and the Google AI SDK, alongside a full SaaS product experience and integrations through a command-driven workflow.