Sebastian Lewandowski

- Architecting and delivering production-grade SaaS platforms using Nuxt.js (Nuxt 3) and Python FastAPI - Building SSR-based frontend systems with Nuxt.js for SEO-optimized and high-performance applications - Developing scalable frontend architecture using Vue 3 Composition API, Pinia, and TypeScript - Designing and implementing high-performance backend systems using FastAPI with async architecture - Creating secure REST APIs with JWT authentication, OAuth2 flows, and RBAC authorization

- Led development of enterprise platforms using FastAPI and Nuxt.js SSR - Designed scalable backend systems with async FastAPI architecture - Built secure REST APIs with authentication, rate limiting, and caching layers - Developed frontend applications using Nuxt.js, Vue 2/3, and Composition API - Optimized SSR performance for SEO-heavy enterprise applications - Designed PostgreSQL schemas with advanced indexing and optimization - Implemented Redis caching for sessions, APIs, and background processing

- Developed scalable full-stack applications using Django and Vue.js - Introduced Nuxt.js SSR architecture for improved SEO and performance - Built modular frontend systems using TypeScript and Vue ecosystem - Designed microservice-style backend APIs and service separation - Implemented real-time features using WebSockets and Redis pub/sub - Built CI/CD pipelines for automated testing and deployment workflows - Containerized applications using Docker for consistent environments

- Built backend services using Django REST Framework for enterprise systems - Designed and implemented REST APIs with JWT authentication and RBAC - Developed frontend modules using Vue.js and Vuex state management - Improved database performance with PostgreSQL indexing and query tuning - Integrated Redis caching to reduce response time for high-load endpoints - Participated in full SDLC including development, testing, and deployment

- Developed basic web modules using Python (Django) and JavaScript - Worked on CRUD-based internal tools connected to PostgreSQL - Assisted in debugging REST API endpoints and improving UI behavior - Supported senior developers in sprint tasks and testing activities - Learned core backend concepts including HTTP, MVC, and database design