A PORTFOLIO IN ANOTHER DIMENSION

Everything,
connected.

I’m Arun. A full stack developer
connecting thoughtful interfaces with powerful systems.

Explore the tesseract View résumé

Open to workFull-time & freelance · India

SCROLL TO TRAVEL

AN EXPLORATION, NOT A DESTINATION.
VOL. 02 / 2026

01 / The origin

The person behindthe architecture.

Mechanical roots. Digital instincts.

I approach software the way I learned to approach engineering: understand the system, then build something that holds up.

I'm Arun Kumar (Arunvpp), a Full Stack Developer based in Warangal, Telangana, India. Across 2+ years at Ldev Technologies and DriveSync Technologies LLP I've delivered REST APIs, database design and responsive UI for enterprise, government and startup clients in e-commerce, EdTech, agriculture and civic services. I came to software from mechanical engineering, and I still build like an engineer: clean architecture, reusable components, and practical, shippable delivery. I'm open to full-time roles and freelance web and mobile projects with teams in Warangal and Hyderabad.

Follow the journey

2+ years full-time

Software Development Engineer 1 at DriveSync Technologies LLP and Full Stack Developer at Ldev Technologies, after a six-month web development internship.

11 client projects

E-commerce, EdTech, agriculture, civic-service and government portals, built with React, Next.js, Node.js, Django, Flutter and React Native.

Live products

Nirvaha, VesperAero and Wizzleflow are deployed end to end — apps, dashboards and APIs you can open today, not slideware.

4 hackathon builds in 2026

Nirvaha at GDG Coimbatore's Tech for Good, VesperAero for Hack2skill BRICS, Wizzleflow for OpenAI Build Week and EchoState AI for the Google DeepMind Hackathon.

Warangal, Telangana, IndiaAlways building forward

02 / The trajectory

Every chapterled here.

Two agencies. Eleven client products. A growing constellation of my own.

01
Mar 2026 — Present
Independent
Independent Product Engineer
Building and deploying full-stack products end to end — mostly hackathon builds that went live and stayed live.
Inside this chapter at Independent
- Built and deployed Nirvaha, a plastic-waste collection platform (NestJS, PostgreSQL, Redis, Socket.IO, Gemini Vision) at GDG Coimbatore's Tech for Good 2026 hackathon — a live app and collector dashboard, not a demo.
- Cut Nirvaha's repeat-scan latency from ~2s to 0.01s with MD5-keyed Redis caching, plus three-key API rotation and an Ollama local fallback for resilience.
- Developed VesperAero, a federated environmental-forensics platform combining the Gemini API, NASA FIRMS satellite data and Gaussian plume physics, for the Hack2skill BRICS Sustainability hackathon.
- Also shipped Wizzleflow (OpenAI Build Week), Interflect (a Rust renderer on crates.io) and EchoState AI (Google DeepMind Hackathon 2026).
- NestJS
- PostgreSQL
- Redis
- Socket.IO
- Gemini API
- Flutter
- React
- Rust
02
Jun 2025 — Mar 2026
DriveSync Technologies LLP
Software Development Engineer 1
Delivered full-stack features across client engagements in an agency-model engineering team, spanning web, mobile and admin tooling.
Client work & impact at DriveSync Technologies LLP8 products
- ListButler AI
  E-commerce listing / PIM platform
  Tailwind CSS frontend · Django backend
- ManaPanta
  Agriculture service marketplace
  Flutter app · Next.js web · Django backend
- Neengal Nalamaa
  Citizen welfare & feedback portal
  Next.js frontend · Node.js backend
- Cloud.edu (Cloud County)
  Interactive T-shirt customizer
  Next.js / React.js frontend
- FullyPass
  EdTech exam-prep platform
  React.js website · Flutter app frontend
- AudioCup
  Specialty coffee brand site
  Bootstrap frontend
- Jiffy
  Delivery app
  React Native frontend
- St. Peter's Law Academy
  Student portal
  Django backend services
- Django
- Node.js
- Next.js
- React.js
- Flutter
- React Native
- Tailwind CSS
- Bootstrap
03
Feb 2024 — Jun 2025
Ldev Technologies
Full Stack Developer
Built frontends and backends for client platforms as part of a delivery team, from assessment tools to a state-level government portal.
Client work & impact at Ldev Technologies3 products
- Received a Certificate of Appreciation from Tamil Nadu Technology Hub (iTNT) for contributions to the JIGSAW portal.
- SpeedExam
  Online assessment platform
  Bootstrap frontend · Django backend
- Vitti
  Furniture & home-living e-commerce
  React.js frontend · Node.js backend
- ITNT
  State-level innovation network portal
  React.js frontend · Node.js backend
- Django
- Bootstrap
- Node.js
- React.js
- Git
04
Aug 2023 — Feb 2024
Ldev Technologies
Web Developer Intern
Learned and applied responsive frontend fundamentals, building practice pages with responsive layouts and interactive UI under team guidance.
- HTML
- CSS
- Bootstrap
- Tailwind CSS

The foundation / Education

2022
B.Tech, Mechanical Engineering
SVS Group of Institutions
2019
Diploma, Mechanical Engineering
Talla Padmavathi College of Engineering

Still learning / Certifications

Getting Started with DevOps on AWS
AWS
Jul 2026
Introduction to Critical Infrastructure Protection
OPSWAT
Sep 2026
Microsoft Azure Essentials
LinkedIn Learning
Jun 2026
Docker MasterClass: Docker, Compose, Swarm, DevOps
Udemy
Aug 2025
Introduction to Large Language Models
Google
Jun 2024
Responsive Web Design
freeCodeCamp
Apr 2024

The full résumé

03 / Selected systems

Ideas madereal.

From waste collection to the physics of light. Four problems, four working answers.

01Live

AI + Full-Stack Platform

Nirvaha

Plastic-waste sorting and collection platform — Flutter app, React vendor dashboard and NestJS API — built by a two-person team in a 36-hour hackathon and still live.

~200× faster repeat scans
13/13 live end-to-end checks
Railway + Netlify deploy

Live site Vendor dashboard Source

Inside the build

A shop owner photographs plastic waste and gets a recyclable or not verdict with resin code and estimated weight. Once a bin reaches 2 kg, the pickup request reaches collection vendors in real time, so a whole neighbourhood can be collected in one trip.

Engineering outcome

Put Gemini Vision behind a NestJS API with MD5-keyed Redis caching, three-key rotation and an Ollama fallback, cutting repeat scans from ~2s to 0.01s. Strict JSON-schema output with a 0.60 confidence floor makes uncertain scans say “not sure” instead of guessing.

System impact

Deployed on Railway (API, PostgreSQL, Redis, S3 storage) and Netlify (landing page and dashboard). Socket.IO pushes pickup requests to vendors without a refresh, and the live deployment passes 13/13 end-to-end checks.

redis: md5(image) → cached verdict

gemini: strict responseSchema, 3-key rotation

socket.io: pickup → vendor board, no refresh

02Live

AI + Geospatial Platform

VesperAero

Federated pollution-forensics platform pairing Gemini Vision with NASA FIRMS satellite data and Gaussian plume physics — shipped as a citizen PWA, a government command center and an Express API.

47/47 tests passing
Five-language UI
Citizen + government apps live

Command center Citizen app Source

Inside the build

Citizens photograph smoke or emissions; the backend classifies the source and opacity, pulls live wind vectors to model the plume across borders, and cross-checks satellite thermal hotspots before regulators triage and dispatch alerts. Built with a three-person team for the Hack2skill BRICS Sustainability hackathon.

Engineering outcome

Kept Gemini keys server-side behind an Express gateway with SHA-256 image de-duplication, payload limits and a daily circuit breaker that falls back to a calibrated physics engine, so the service stays up when the AI quota runs out.

System impact

Live on Railway and Netlify with a Flutter Android build and a five-language UI. PostgreSQL, Redis and MinIO run in Docker for local parity, and the Jest suite passes 47/47 tests.

POST /api/reports/pollution

plume: gaussian dispersion, stability A–F

firms: MODIS/VIIRS hotspot overlay

03Live

AI Web App · React + TypeScript

Wizzleflow

Local-first flowchart editor: describe a process in plain English and get an editable, properly routed diagram. Built for OpenAI Build Week and live at wizzleflow.xyz.

Text → editable diagram
No account, local-first
Custom SVG layout engine

Live app Source

Inside the build

No account and no database — diagrams live in the browser, and only the prompt or current canvas is sent when you ask the AI to generate a flow, review it for missing branches, write QA test cases, or regenerate a selected branch.

Engineering outcome

Replaced a heavy graph library with a custom SVG canvas and a BFS layout algorithm, and validated every model response against Zod schemas so AI output can never crash the renderer.

System impact

React 18, Vite and Tailwind CSS on the frontend with a thin Node.js API that keeps model keys off the client. Diagrams export to PNG, SVG, PDF and JSON.

prompt → structured JSON → zod.parse()

layout: BFS → x/y SVG coordinates

storage: localStorage, no database

04crates.io

Systems Programming · Rust

Interflect

Deterministic CPU renderer that solves global illumination with radiosity on signed distance fields — noise-free, about 20× faster than a converged path trace, and published on crates.io.

~20× faster than path tracing
Bit-identical on any thread count
0.5 MB, 3 dependencies

Project site Source crates.io

Inside the build

Instead of averaging random samples, it places surfels on the SDF surface by Newton projection, builds a sparse form-factor matrix once, and solves light transport directly — so there is no grain to denoise and no GPU required.

Engineering outcome

Designed the pipeline for bit-identical output on any thread count — Halton sequences instead of an RNG, Jacobi instead of Gauss-Seidel — and enforced it in CI on every commit.

System impact

Ships as a 0.5 MB binary with three dependencies, install scripts and checksummed releases. Its 25 regression tests each reproduce a real bug found during development.

interflect render scenes/cornell.rad -o out.png

solve: 12 bounces, residual 5.37e-5

md5(a.png) == md5(b.png) at -t 1 and -t 12

04 / The dimensions

Acrossevery layer.

The interface, the API, the data, the device. I work where they meet.

Frontend Engineering

Responsive, production UI with React.js, Next.js, TypeScript and Tailwind CSS — reusable components, state with Redux, TanStack Query or Zustand, and motion with GSAP where it earns its place.

Already shipped

Cloud.edu's T-shirt customizer, FullyPass, ListButler AI and Neengal Nalamaa at DriveSync; Vitti and ITNT at Ldev; Wizzleflow on my own.

Backend & APIs

REST APIs and data layers with Node.js, Express, NestJS and Django — PostgreSQL, MySQL and MongoDB schemas, Redis caching, auth, and real-time updates over Socket.IO.

Already shipped

Django backends for ListButler AI, ManaPanta, SpeedExam and St. Peter's Law Academy; Node.js for Neengal Nalamaa, Vitti and ITNT; NestJS + Redis for Nirvaha.

Mobile Apps

Cross-platform apps with Flutter, React Native and Expo — offline-first storage with SQLite, device notifications, and flows that hold up on real phones, not just emulators.

Already shipped

ManaPanta and FullyPass in Flutter and Jiffy in React Native at DriveSync; the Nirvaha Android app and BluNote on my own.

AI Integration

AI features that fail safely with the Gemini API, strict structured outputs, caching and fallbacks — plus hands-on model work: QLoRA fine-tuning and DPO alignment of Gemma-2B.

Already shipped

Gemini Vision in Nirvaha and VesperAero, LLM structured outputs in Wizzleflow, and Nexura-Gemma2B published on Hugging Face.

Beyond the toolkit

How I build matters.

Frameworks change; these don't. Clean, reusable code, testing as part of shipping, owning the deploy, and using AI tools with judgment — practiced on agency client work and on my own products.

Clean, reusable architecture

Component-driven frontends and modular backends — NestJS modules, Django apps, shared UI primitives — so the next developer can extend the code instead of rewriting it.

Testing & QA

Unit tests, Playwright end-to-end runs and Postman collections as part of shipping a feature, not an afterthought once it breaks.

DevOps & delivery

Docker, GitHub Actions CI/CD, and deploys to Cloudflare, Railway and Netlify — including this site, which runs on Cloudflare Workers.

AI-assisted development

Daily use of Claude Code, Codex and Google Antigravity to move faster — with code review, tests and engineering judgment kept firmly human.

Tools of the trade

~2s → 0.01s

Repeat-scan latency in Nirvaha after putting MD5-keyed Redis caching in front of Gemini Vision, with three-key rotation and an Ollama fallback.

11 client projects

Shipped with two agency teams across e-commerce, EdTech, agriculture, civic-service and government portals — on web and mobile.

~20× faster

Interflect's noise-free CPU renderer versus a converged path trace of the same scene, with bit-identical output enforced in CI.

0 keys in the client

Nirvaha and VesperAero keep every model API key on the server — never in the APK or the browser bundle — with caching and fallbacks in front of the AI provider.

05 / The constellation

The otherdimensions.

Experiments, small obsessions, and the builds that keep the curiosity alive.

Public repos link straight to the code. Private ones are listed from my GitHub profile — happy to walk through any of them in an interview.

01Public

Kotlin + FastAPI + Gemini Live

EchoState AI

Eyes-free Android assistant for blind and deaf-blind users: gesture-only UI, full-duplex voice with barge-in, and on-device Gemma for private documents. Built for the Google DeepMind Hackathon 2026.

Open source

02Public

Expo + React Native + SQLite

BluNote

Offline-first hydration tracker with on-device storage, local notifications, backup and restore, no accounts and zero telemetry.

Open source

03Public

Elixir + Phoenix LiveView

Reynox

Authenticated AI workspace that streams local llama.cpp completions to the browser, with persisted chat, AI email drafting and admin tooling.

Open source

04Private repo

React + Node.js + Prisma + Ollama

hateble

Self-hosted “Lovable lite”: local LLMs through Ollama generate, build and iterate on full-stack web apps without sending code to the cloud.