Available for freelance projects
AdityaKumar
Co-founder and CTO of English Learners, software engineer at Deal Bana and a tools maintainer at the Wikimedia Foundation. I build real-time products that thousands of people use every day, and I take on freelance projects.
Aditya Kumar
Co-Founder & CTO, English Learners
What I'm doing right now
- Since 2025
Co-Founder & CTO
EnglishLearners Education Pvt. Ltd.
Built the ed-tech platform from zero: live voice rooms, payments and the whole backend.
- Since Apr 2026
Software Engineer
Deal Bana
Building the core of a multi-vendor marketplace: catalogue, search, vendor onboarding and payments.
- Open source
Tools Maintainer
Wikimedia Foundation
Maintaining community tools on Toolforge used by Wikipedia editors and organisers.
Products I've built and shipped
Platforms real people log into every day, from a 25,000-member learning community to a national exam.
Open source at Wikimedia
As a Tools Maintainer for the Wikimedia Foundation I keep community tools on Toolforge running for Wikipedia editors worldwide, and review work from 20+ mentors and contributors.
Tools Maintainer, Wikimedia Foundation
I started contributing to MediaWiki and Wikisource, then took on maintaining tools used to run edit-a-thons and community programmes. I also founded WikiClub SHUATS, where 50+ students made their first open-source contributions.
My MediaWiki profileWikiContest
Runs large Wikipedia edit-a-thons: contest setup, live participant tracking, submission checks and jury scoring.
- Python
- Vue.js
- MySQL
- Alembic
Community Management App
Dashboard Wikimedia organisers use to run their communities, with role-based access and layered permissions.
- Vue.js
- Node.js
- OAuth
- Toolforge
Indic WSStats
Moved Wikisource statistics from a JSON file to a MySQL database with SQLAlchemy so the data can be queried and survives restarts.
- Python
- Flask
- SQLAlchemy
Wikisource OCR
Extracts text from scanned Wikisource pages with Tesseract and turns it into editable pages.
- Python
- Tesseract
- OpenCV
Side projects and experiments
Face mask detection
Real-time CNN classifier over a webcam stream.
TensorFlow, OpenCV
Ham / spam classifier
Multinomial Naive Bayes email filter.
Python, scikit-learn
Study Friend
Notes, links and YouTube resources in one study space.
Next.js, React
Have a project? I'm available for freelance work.
I work with startups, agencies and local businesses. You deal with me directly, the same engineer who built a platform for 25,000 people.
Web apps & SaaS
Full products from database to interface, built with Next.js, TypeScript and PostgreSQL.
Marketplaces & payments
Listings, vendor onboarding, Razorpay checkout, shipping and GST handled properly.
Live audio, video & chat
Group calls, rooms and real-time updates with LiveKit, WebRTC and Socket.IO.
Business websites & SEO
Fast sites that rank locally and turn visitors into enquiries.
How we'd work together
- 1
We talk
You tell me the goal, the users and the deadline. I reply with a plan and a fixed quote.
- 2
I build
You get a working preview link early and updates every few days, not a surprise at the end.
- 3
We launch
I deploy, hand over the code and accounts, and stay around for fixes after launch.
How I got here
From organising student tech clubs to running engineering at a company I co-founded.
- 2026Current
Software Engineer
Deal Bana, New Delhi
Marketplace architecture, OpenSearch, Redis/BullMQ on ECS Fargate, Razorpay and Shiprocket, technical SEO.
- 2025Current
Co-Founder & CTO
EnglishLearners Education Pvt. Ltd.
Shipped the platform to 25,000+ members. Moved the data layer from MongoDB to PostgreSQL, set up CI/CD on AWS and Cloudflare, and lead the dev team through code reviews.
- 2024Current
Tools Maintainer
Wikimedia Foundation
Maintain open-source tools on Toolforge and coordinate 20+ mentors and contributors.
- 2024
Junior Researcher
MNNIT Allahabad
Cryptography and network security. Improved AES resistance to timing attacks by 25% with statistical modelling.
- 2023
Summer Research Intern
IIIT Allahabad
AI and robotics: trained CNN object-detection models with TensorFlow and OpenCV.
- 2023
Community founder & organiser
WikiClub SHUATS and GDG Prayagraj
Helped 50+ students make their first open-source contributions. Organised DevFest and Google I/O Extended for hundreds of developers.
- 2022
B.Tech, Computer Science & Engineering
SHUATS, Prayagraj
Class of 2026.
Tools I use every day
Product
- Next.js
- React
- TypeScript
- Node.js
- Express
- Tailwind CSS
- Vue.js
- Flutter
Data
- PostgreSQL
- Drizzle ORM
- MySQL
- MongoDB
- Redis
- OpenSearch
- Vector databases
Real-time & cloud
- LiveKit / WebRTC
- Socket.IO
- BullMQ
- AWS
- Cloudflare
- Docker
- CI/CD
AI & languages
- Python
- Java
- C++
- TensorFlow
- OpenCV
- Generative AI
- Django
- Flask
Usually replies within a day
Let's build your next product.
Freelance projects, full-time roles or a technical co-founder conversation. Write to me and I'll get back to you.
adityakumar2019.ak@gmail.com