Sergi Jajanidze - Portfolio

Skills

Languages

JavaScript

TypeScriptHTML5CSS3

Frontend

React

Next.js

AngularLitWeb ComponentsTailwind CSSCSS-in-JSDesign Systems

State & Data

ZustandReduxGraphQLTanStack Query

Backend & APIs

Node.jsNestJSExpressREST APIsWebSocket

Data & Storage

MongoDBPostgreSQLRedis

Architecture

Micro-frontendsMonoreposModule FederationSSR

AI & LLM

LLM API IntegrationRAGPrompt Engineering

Testing & Quality

VitestJestReact Testing LibraryPlaywrightCore Web VitalsWCAG

Tooling & DevOps

ViteWebpackESLintCI/CDDocker

AWS

Certifications

Projects

Threads App

Focus: Full-Stack Architecture

Social discussion platform inspired by Reddit, built with Next.js 15, React 19, Prisma, and HeroUI. Users can create threads, post content, and engage through nested comments.

Live Demo Source Code

Real-time Editor App

Focus: Real-time Systems

Real-time collaborative text editor built using Node.js, Socket.IO, and Quill.js, with storage in Redis and containerized using Docker for deployment/local development. The app allows multiple users to simultaneously edit the same document with instant synchronization across clients.

Case Study Source Code

Excel App

Focus: Framework Internals & Performance

Excel application created with vanilla JavaScript. Implemented custom web framework from the scratch (with state, routing, eventing, storage, DOM manipulations). Used Tailwind CSS for styling.

Case Study Live Demo Source Code

Search App

Focus: Algorithmic Efficiency

JavaScript search engine built on a Trie (prefix tree) data structure for fast text lookup and autocomplete. Supports instant prefix-based searching, smart suggestions, and relevance-ranked results.