I'm currently working as a Backend Engineer at TaxPlan Advisor, where I build production-grade backend systems for financial services.
My work focuses on designing scalable REST APIs, backend architecture, PostgreSQL database design, AWS deployments, and integrating AI-powered workflows into real-world applications.
Outside of work, I enjoy building products that combine clean engineering, intuitive user experience, and practical AI to solve real problems.
- ⚡ Designing scalable REST APIs with FastAPI
- 🏗 Building backend systems for production workloads
- 🗄 PostgreSQL database architecture & optimization
- ☁ Deploying and maintaining cloud applications on AWS
- 🤖 AI-powered applications using LLMs and semantic search
- 🔗 Third-party API integrations
- 📈 Improving system performance and scalability
AI-powered legal assistant that performs semantic legal search, predicts relevant IPC sections, and generates intelligent summaries using LLMs.
Stack
Python • FastAPI • React • ChromaDB • Sentence Transformers • Gemini API
🔗 Repository
https://github.com/leanderfdes/ai-legal-decision-support
Production-style movie discovery platform with queue-based background workers, authentication, scalable APIs, and premium frontend.
Stack
React • Node.js • Express • MongoDB • Redis • BullMQ
🔗 Repository
https://github.com/leanderfdes/Cinevault
🌐 Live
https://cinevault-ten.vercel.app
Modern playground demonstrating FastAPI architecture with Gemini integration.
Stack
FastAPI • React • Gemini • Tailwind
🔗 Repository
https://github.com/leanderfdes/llm-playground
🌐 Live
https://llm-playground-fastapi-gemini-nffi-ou4twwlmk.vercel.app
Premium CMS-driven website focused on storytelling, performance, and immersive UI.
Stack
Next.js • TypeScript • Tailwind • GSAP • Sanity CMS
🔗 Repository
https://github.com/leanderfdes/riddhis-creation
Personal portfolio showcasing projects, experience, and engineering journey.
🌐 https://portfolio-lovat-tau-94.vercel.app
🔗 Repository
https://github.com/leanderfdes/leander-dev
- Large Language Models (LLMs)
- Retrieval-Augmented Generation (RAG)
- Semantic Search
- NLP
- Sentence Transformers
- Gemini API
- Computer Vision


