RAG language-learning tutor (Final Year Project)

A full-stack AI language-learning platform: a retrieval-augmented tutor that generates courses, adapts quizzes to a learner, and tracks CEFR proficiency. Independently designed and developed.

• Independently designed and developed a RAG chatbot tutor with LangChain over a pgvector store, streaming responses over Server-Sent Events; evaluated by 30 users during assessment.
• Designed a dynamic course generator that turns any topic into modules, classes, and quizzes with concurrent Google Gemini API calls under a rate limit.
• Built an adaptive quiz engine that personalizes questions from tracked weak points and recalculates CEFR proficiency (A1–B2) from recent attempts.
• Implemented authentication with bcrypt, JWT access and refresh tokens, and Google OAuth, with silent refresh before expiry.
• Added Redis caching, rate limiting, input sanitization, and an LLM-based prompt-injection classifier.
• Deployed a split architecture: Next.js frontend on Vercel, FastAPI backend on Render, serverless PostgreSQL on Neon.

• LangChain
• RAG
• pgvector
• FastAPI
• Next.js
• PostgreSQL
• Google Gemini API
• Redis
• SQLAlchemy
• Alembic
• JWT / OAuth
• SSE

Internal AI automation agent (ECTrons)

🔒 Confidential internship work at ECTrons — described only, with no screenshots or interface recreation.

An internal AI automation agent built on modular n8n workflows for automated document generation and resume-screening support, with multimodal input across text, voice, and document parsing. It remained in use at the company after the internship ended.

• Designed and implemented Virtual Zara on modular n8n workflows for automated PDF and document generation and resume-screening support.
• Enabled multimodal input across text, voice, and document parsing.
• Integrated five external systems (GitLab, Google Workspace, Microsoft Graph, Telegram Bot, OpenAI) across three business domains: HR, finance, and project management.

• n8n
• OpenAI API
• GitLab API
• Google Workspace
• Microsoft Graph
• Telegram Bot API

Self-hosted private chat & journal app

A full-stack self-hosted chat and journal application that runs entirely on the user’s own hardware — no third-party API ever touches user content. Open source under MIT.

• Built a self-hosted chat and journal app that runs entirely on the user’s own hardware with a single `docker compose up` — no third-party API ever touches user content.
• Integrated local Ollama models (Llama 3.2 3B) so no data leaves the host, degrading gracefully when the model is offline.
• Implemented per-user journal encryption at rest with a key derived from the user’s password, so the server operator cannot read another user’s entries.
• Built full-text search over messages and memories with SQLite FTS5 against a human-readable markdown vault.
• Shipped chat with presence, delivery and read receipts, reactions, and link previews, plus time capsules, scheduled letters, a shared dreams board, and a locally generated monthly PDF scrapbook.

• Next.js 14
• TypeScript
• Tailwind CSS
• shadcn/ui
• FastAPI (Python 3.11)
• SQLite FTS5
• Ollama
• bcrypt / JWT
• Docker Compose
• PWA

Full-stack campus events platform

A full-stack campus events platform with role-based access, an organizer moderation queue, QR check-in, and automatic tracking of MyCSD (university co-curricular development points). Payments are simulated.

• Built a campus events platform: public event browsing and search, RSVP with capacity limits, simulated ticketed payments, and automatic MyCSD (university co-curricular points) tracking.
• Implemented role-based access control across student, organizer, and admin roles, with server-side render auth guards and API guards blocking unauthorized routes.
• Built an organizer self-service flow where submitted events enter a moderation queue and go live only after admin approval.
• Designed a QR-code check-in system that marks attendance and awards MyCSD points automatically on scan.
• Built an admin dashboard with event CRUD, approval queues, user and email moderation, and a Recharts analytics view.

• Next.js 15
• TypeScript
• PostgreSQL
• Prisma
• NextAuth
• Zod
• Tailwind CSS
• shadcn/ui
• Framer Motion
• Recharts
• Vercel Blob