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DriveSync Technologies
Software Development Engineer 1 — full-stack features for eight client products across web, mobile and admin tooling.
Arun Kumar (Arunvpp), Full Stack Developer. I build full-stack web & mobile apps!
Full Stack Developer with 2+ years at Ldev Technologies and DriveSync Technologies LLP, shipping React, Next.js, Node.js, Django and Flutter features for enterprise, government and startup clients. Now open to full-time roles.
Ldev Technologies
Full Stack Developer on SpeedExam, Vitti and the state-level iTNT innovation portal, after a web development internship.
Nirvaha
Live plastic-waste platform: NestJS, PostgreSQL, Redis and Gemini Vision, with repeat scans cut from ~2s to 0.01s.
VesperAero
Pollution-forensics platform pairing Gemini with NASA FIRMS satellite data and Gaussian plume physics, live on Railway and Netlify.
Interflect
Deterministic CPU renderer in Rust, about 20× faster than a converged path trace and published on crates.io.
Wizzleflow
Local-first AI flowchart editor built for OpenAI Build Week — React, TypeScript and Zod-validated LLM output, live at wizzleflow.xyz.
DriveSync Technologies
Software Development Engineer 1 — full-stack features for eight client products across web, mobile and admin tooling.
Ldev Technologies
Full Stack Developer on SpeedExam, Vitti and the state-level iTNT innovation portal, after a web development internship.
Nirvaha
Live plastic-waste platform: NestJS, PostgreSQL, Redis and Gemini Vision, with repeat scans cut from ~2s to 0.01s.
VesperAero
Pollution-forensics platform pairing Gemini with NASA FIRMS satellite data and Gaussian plume physics, live on Railway and Netlify.
Interflect
Deterministic CPU renderer in Rust, about 20× faster than a converged path trace and published on crates.io.
Wizzleflow
Local-first AI flowchart editor built for OpenAI Build Week — React, TypeScript and Zod-validated LLM output, live at wizzleflow.xyz.
React.jsNext.jsTypeScriptNode.jsExpress.jsNestJSDjangoPythonFlutterReact NativePostgreSQLMongoDBRedisPrismaTailwind CSSDockerGitHub ActionsGemini APIReact.jsNext.jsTypeScriptNode.jsExpress.jsNestJSDjangoPythonFlutterReact NativePostgreSQLMongoDBRedisPrismaTailwind CSSDockerGitHub ActionsGemini API
About
Full stack developer who ships — from the API and the database to the screen people actually use.
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 looking for a full-time role on a team that ships.
01
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.
02
11 client projects
E-commerce, EdTech, agriculture, civic-service and government portals, built with React, Next.js, Node.js, Django, Flutter and React Native.
03
Live products
Nirvaha, VesperAero and Wizzleflow are deployed end to end — apps, dashboards and APIs you can open today, not slideware.
04
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.
Experience
Two agencies, eleven client projects, and live products of my own.
From a web development internship in 2023 to Software Development Engineer at DriveSync, I've delivered REST APIs, database work and responsive UI for real clients. Since March 2026 I've been building and deploying my own products while I look for my next full-time role.
2+ years full-time · 11 client projects
Mar 2026 — Present
Independent Product Engineer
Independent
Building and deploying full-stack products end to end — mostly hackathon builds that went live and stayed live.
- 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).
NestJSPostgreSQLRedisSocket.IOGemini APIFlutterReactRustJun 2025 — Mar 2026
Software Development Engineer 1
DriveSync Technologies LLP
Delivered full-stack features across client engagements in an agency-model engineering team, spanning web, mobile and admin tooling.
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
DjangoNode.jsNext.jsReact.jsFlutterReact NativeTailwind CSSBootstrapFeb 2024 — Jun 2025
Full Stack Developer
Ldev Technologies
Built frontends and backends for client platforms as part of a delivery team, from assessment tools to a state-level government 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
- Received a Certificate of Appreciation from Tamil Nadu Technology Hub (iTNT) for contributions to the JIGSAW portal.
DjangoBootstrapNode.jsReact.jsGitAug 2023 — Feb 2024
Web Developer Intern
Ldev Technologies
Learned and applied responsive frontend fundamentals, building practice pages with responsive layouts and interactive UI under team guidance.
HTMLCSSBootstrapTailwind CSS
Education
B.Tech, Mechanical Engineering
SVS Group of Institutions · 2022
Diploma, Mechanical Engineering
Talla Padmavathi College of Engineering · 2019
Certifications
- Getting Started with DevOps on AWS · AWSJul 2026
- Introduction to Critical Infrastructure Protection · OPSWATSep 2026
- Microsoft Azure Essentials · LinkedIn LearningJun 2026
- Docker MasterClass: Docker, Compose, Swarm, DevOps · UdemyAug 2025
- Introduction to Large Language Models · GoogleJun 2024
- Responsive Web Design · freeCodeCampApr 2024
Work
Selected work: products I've built, deployed and kept live.
Each of these is live or open source, so you can check the work instead of taking my word for it. Client work from DriveSync and Ldev is listed under Experience.
01AI + 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.
redis: md5(image) → cached verdict
gemini: strict responseSchema, 3-key rotation
socket.io: pickup → vendor board, no refresh
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.
~200× faster repeat scans13/13 live end-to-end checksRailway + Netlify deploy
Tech stack
NestJSPostgreSQLRedisSocket.IOGemini VisionFlutterReactDocker
02AI + 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.
POST /api/reports/pollution
plume: gaussian dispersion, stability A–F
firms: MODIS/VIIRS hotspot overlay
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.
47/47 tests passingFive-language UICitizen + government apps live
Tech stack
Node.jsExpressPostgreSQLRedisGemini APINASA FIRMSReactFlutter
03AI 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.
prompt → structured JSON → zod.parse()
layout: BFS → x/y SVG coordinates
storage: localStorage, no database
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.
Text → editable diagramNo account, local-firstCustom SVG layout engine
Tech stack
ReactTypeScriptViteTailwind CSSZodNode.jsLLM structured outputs
04Systems 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.
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
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.
~20× faster than path tracingBit-identical on any thread count0.5 MB, 3 dependencies
Tech stack
RustSigned distance fieldsRadiosityBVHGitHub Actionscrates.io
Skills
full stack
developer
Across two agencies and my own products I've worked every layer: the UI, the API behind it, the mobile app beside it, and increasingly the AI feature inside it. Here's where I'm strongest — and where I've already shipped it.
What I bring to a team
Skill 01
01/4Frontend 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.
Where I've shipped it
Cloud.edu's T-shirt customizer, FullyPass, ListButler AI and Neengal Nalamaa at DriveSync; Vitti and ITNT at Ldev; Wizzleflow on my own.
Skill 02
02/4Backend & 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.
Where I've shipped it
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.
Skill 03
03/4Mobile 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.
Where I've shipped it
ManaPanta and FullyPass in Flutter and Jiffy in React Native at DriveSync; the Nirvaha Android app and BluNote on my own.
Skill 04
04/4AI 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.
Where I've shipped it
Gemini Vision in Nirvaha and VesperAero, LLM structured outputs in Wizzleflow, and Nexura-Gemma2B published on Hugging Face.
Capabilities
Beyond the stack: the habits a team gets when it hires me.
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.
How I work
01
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.
02
Testing & QA
Unit tests, Playwright end-to-end runs and Postman collections as part of shipping a feature, not an afterthought once it breaks.
03
DevOps & delivery
Docker, GitHub Actions CI/CD, and deploys to Cloudflare, Railway and Netlify — including this site, which runs on Cloudflare Workers.
04
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.
React.jsNext.jsTypeScriptJavaScriptTailwind CSSReduxTanStack QueryZustandshadcn/uiNode.jsExpress.jsNestJSDjangoPythonREST APIsSocket.IOGSAPViteFlutterReact NativeExpoPostgreSQLMySQLMongoDBPrismaRedisBullMQSQLiteDockerGitHub ActionsCloudflarePlaywrightPostmanGemini APIHugging FaceQLoRA
React.jsNext.jsTypeScriptJavaScriptTailwind CSSReduxTanStack QueryZustandshadcn/uiNode.jsExpress.jsNestJSDjangoPythonREST APIsSocket.IOGSAPViteReact.jsNext.jsTypeScriptJavaScriptTailwind CSSReduxTanStack QueryZustandshadcn/uiNode.jsExpress.jsNestJSDjangoPythonREST APIsSocket.IOGSAPVite
FlutterReact NativeExpoPostgreSQLMySQLMongoDBPrismaRedisBullMQSQLiteDockerGitHub ActionsCloudflarePlaywrightPostmanGemini APIHugging FaceQLoRAFlutterReact NativeExpoPostgreSQLMySQLMongoDBPrismaRedisBullMQSQLiteDockerGitHub ActionsCloudflarePlaywrightPostmanGemini APIHugging FaceQLoRA
Proof 01
~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.
Proof 02
11 client projects
Shipped with two agency teams across e-commerce, EdTech, agriculture, civic-service and government portals — on web and mobile.
Proof 03
~20× faster
Interflect's noise-free CPU renderer versus a converged path trace of the same scene, with bit-identical output enforced in CI.
Proof 04
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.
Availability
Open to full-time Full Stack, Frontend and Software Engineer roles.
2+ years of shipping React, Next.js, Node.js, Django and Flutter work for real clients, ready to bring that to a product team. Based in Warangal, Telangana, India.