Software engineer · Kochi, India

Sayan Binu
Jacob.

I build AI systems and the backend services that power them.

Explore my work @sayanjacob

02 / Professional work

Experience

UST · Jun 2024–Present · Kochi, India

Migrated a fintech backend from Spring Boot 3.4.3 to 4.0.5 using a layered controller–service–repository architecture, removing more than 5,000 lines of legacy code.
Built REST APIs in Java and Spring Boot for investment, wallet, and trading console workflows.
Built Stripe payment infrastructure with KYC verification, bank tokenization, and automated onboarding.
Implemented OTP-based multi-factor authentication and upgraded Spring Security and JWT signing.
Rebuilt the client platform in Angular 20 with lazy-loaded, role-based routing.
Built a real-time AI voice assistant with WebSocket audio streaming and MCP-backed chat.

UST · Dec 2022–May 2024 · Trivandrum, India

Extended Azure Cognitive Search in a retrieval-augmented generation (RAG) workflow to return Azure Blob Storage URLs for source documents.
Built React components that display source citations alongside AI-generated answers.
Refined LLM system prompts to improve response quality and relevance.

Claude Certified Developer – Foundations · Anthropic

03 / Independent work

A retrieval chatbot for developer questions about EU visas, degree recognition, and salary benchmarks.

ChromaDB / SQLite / Ollama

Collects job listings, matches them against my résumé, and tracks applications in a dashboard.

FastAPI / SQLite / React

An Azure training environment with tools to manage virtual machines, run scenarios, and inspect logs.

Azure / Angular / Flask

04 / Contact

Email me LinkedIn GitHub