FocusTag
Co-founder · Architecture lead
Phone-to-phone NFC with a QR fallback, for classroom focus enforcement.
- Kotlin
- NFC
- Next.js
- TypeScript
- Supabase
Hello, world. I’m
Amartya Sarangee
Software Engineer & FocusTrigger Co‑Founder + Director
BackendApplied AISystem Architecture
Building FocusTag at FocusTrigger Automation · Bhubaneswar, Odisha, India
View the interactive 3D desk (best on a laptop or desktop)
About
I'm a third-year Computer Science student at GIET University, Co-Founder & Director at FocusTrigger Automation Pvt Ltd, and a software developer. I like building intelligent systems that solve real-world problems.
I work across software engineering, system architecture, applied AI/ML, generative AI and agentic systems. I enjoy designing applications end to end and finding new approaches to automation.
Most of all, I like turning technical ideas into reliable, production-ready software: making architectural decisions deliberately, weighing the tradeoffs, and building systems that hold up.
Co-Founder & Director · Oct 2026 – Present
FocusTrigger Automation Pvt Ltd.
Building FocusTag: NFC- and QR-enabled interactions, built for focus.
My role. I lead the architecture and technical approach. I decide the engineering tradeoffs and make sure the product is scalable and built to industry standards.
FocusTag is the company's first proprietary product. It supports direct phone-to-phone NFC interaction, with a QR code as a fallback. Its first use is classroom focus: NFC checkpoints and mobile focus enforcement, managed from an admin dashboard.
Alongside FocusTag, we build custom software and technology services for organisations and startups, turning product ideas into working software. We work in reviewable stages and keep a clear line between what exists today and what is planned.
- Kotlin (Android)
- NFC
- QR fallback
- Next.js
- TypeScript
- Supabase
Selected projects
Complaint & Case Management System
Team lead
Complaint intake, routing, escalation and analytics for colleges. Keyword classification feeds a priority engine, and a local LLM routes complaints to departments.
- 58 automated test cases; CI runs pytest against MySQL + Redis
- 0–100 priority score from severity, impact and age, recalculated hourly
- 10 / min login rate limit (100 / min default, 20 / min for new complaints)
- FastAPI
- SQLAlchemy
- MySQL
- Redis
- APScheduler
- React 19
- Vite
- Docker
- Nginx
- GitHub Actions
- Ollama · Qwen 3.5 4B
AgentArora
Smart India Hackathon 2026 · Agent & architecture
A privacy-preserving browser agent: personal data on the page is detected and redacted locally before any reasoning model sees it.
- 48 tests on the agent layer I built (134 across the project)
- 5 frozen JSON contracts between perception, privacy, agent and execution
- Python
- JSON Schema
- Chrome MV3
- LLM adapter
EPL 2025-26 Analytics
Applied ML · Live
A 10-page Streamlit dashboard with leakage-free match-outcome models, a chronological Elo system, and honest model reporting.
- 380 matches across 20 teams
- 3 classifiers compared against a 44.8% home-win baseline
- 12 pipeline tests, including leakage and Elo conservation
- Python
- pandas
- scikit-learn
- XGBoost
- SHAP
- Streamlit
- Plotly
- Pytest
Real-time Food Ordering Platform
Solo
One API for customers, restaurant owners and admins, with live order status over Socket.IO.
- 3 roles customer, restaurant owner and admin, enforced in middleware
- 4 states Received → Preparing → Ready → Delivered
- 27 API test cases (auth, orders, admin)
- React
- Node.js
- Express
- MySQL
- Socket.IO
- JWT
- Jest
- Supertest
Optify
Hackathon MVP · AI
Fetches heavy web pages on the server and streams an AI-summarized text version to students on slow connections.
- 3 models fallback chain when the API rate-limits: Gemini 2.5 Flash-Lite → Gemini 1.5 Flash → Gemma 3
- FastAPI
- HTTPX
- BeautifulSoup
- Gemini API
- Preact
- Vite
- Tailwind CSS
Women Safety SOS Platform
Concept · Safety
A one-tap SOS with live GPS tracking and a police response dashboard.
- React
- FastAPI
This portfolio (AmartyaOS)
Solo · Live
A 3D desk on desktop, a fast text page on phones, and a retro OS built from scratch, all generated from one content file.
- 100 Lighthouse SEO, accessibility and best practices (mobile)
- 98 → 6 MB site weight after removing and recompressing assets
- 908 → 4 KB JavaScript sent to phones (3D code is split out)
- 11.2 → 2.6 s time to the start screen on a 4 Mbps connection
- Three.js
- TypeScript
- Vanilla JS
- Webpack
- Vercel
- Hostinger DNS
Experience
-
Oct 2026 – Present · Gunupur, Odisha
Co-Founder & Director
FocusTrigger Automation Pvt Ltd.
- Building FocusTag, the company’s first product: phone-to-phone NFC with a QR fallback.
- Lead the architecture and technical approach: own the tradeoffs and keep the product scalable and industry-standard.
- Deliver custom software for organisations and startups, in reviewable stages.
-
Jul 2026 – Aug 2026
Development Intern (Full Stack)
Thiranex EduTech LLP
- Shipped full-stack features (React + FastAPI) across four production applications.
- Relational database design, JWT authentication and third-party API integrations, supporting parallel delivery across all four codebases.
-
Mar 2026 – Apr 2026 · Remote
Freelance Web Developer
CollectIQ Services
- Built and deployed collectiqservices.com end to end for a startup client.
- Owned the Hostinger hosting, a pre-launch security audit and the EmailJS form backend.
- Set up the client’s email infrastructure and added front-end code protections before handover.
-
Jun 2025 – Jul 2025
Data Specialist
Central Tool Room & Training Centre (CTTC), Bhubaneswar
- Cleaned and preprocessed datasets in Python and Excel.
- Built exploratory visualizations in Tableau for the analytics team’s internal reporting.
Education
- B.Tech, Computer ScienceGIET University, GunupurNov 2024 – Nov 2028
- Class 12Doon International School2022 – 2024
- Class 10St. Joseph’s Convent Higher Secondary School, Sambalpur2011 – 2021
Certificates
Skills
- Core engineering Used in shipped projects
- Python
- JavaScript / TypeScript
- SQL
- FastAPI
- Node.js / Express
- REST API design
- SQLAlchemy
- MySQL
- Redis
- JWT auth & RBAC
- WebSockets / Socket.IO
- React
- System design
- Applied AI & ML Applied in the projects above
- Local LLMs (Ollama · Qwen)
- Gemini API & model fallback
- LLM agent design & guardrails
- PII redaction for AI
- scikit-learn
- XGBoost
- pandas
- Leakage-free evaluation
- Streamlit
- Infrastructure & tools Used to build, test and ship
- Docker & Compose
- Nginx
- GitHub Actions CI
- Pytest
- Jest & Supertest
- Alembic
- APScheduler
- Rate limiting (slowapi)
- Vercel
- DNS (Hostinger)
- Git
- Linux
- Familiar technologies Worked with, less depth
- Java
- C++
- Kotlin
- Flask
- Next.js
- Supabase
- PostgreSQL
- Tailwind CSS
- Vite
- Chrome extensions (MV3)
- YOLOv8
- LlamaIndex
- FAISS
- Cohere API
- DistilBERT
- CatBoost
- Sentry
- Tableau
- Excel
- Railway
- Netlify
Let’s talk
Want to talk about FocusTag, a collaboration, or something you’re building? Send me a message.
amartyasarangee@