Open to collaboration, partnerships & consulting worldwide
Sachin Sharma
Educator · EdTech Founder · Full-Stack & AI Developer
Building free, world-class education for every learner.
I'm an educator and self-taught full-stack developer who turned 13+ years of classroom and content experience into free, ad-free learning platforms used by students around the world. I founded a Delhi non-profit in 2012, then designed, coded and shipped an entire EdTech ecosystem — solo, building fast with an AI-first workflow: Claude, ChatGPT, DeepSeek, Mistral and AI agents.
Accomplished educator and non-profit founder with over a decade of experience teaching mathematics to underprivileged students, paired with a rare, hands-on command of modern full-stack engineering. I founded the Udgam Welfare Foundation (2012), a Delhi-based NGO providing free coaching, digital learning, food, accommodation and travel support to students who cannot afford private tuition. Most recently I conceived, architected and single-handedly built Vidaara.org — a free, full-stack e-learning portal (Node.js, Express, MySQL) that renders LaTeX/KaTeX mathematics at textbook quality and delivers K–12, JEE/NEET, SAT/CAT/SSC, language-learning and mock-test resources to learners worldwide. Around it I built Ganak (a step-by-step mathematics engine), Ankora (a math game for children) and companion Flutter apps. I also partner with other non-profits — including The Lepra India Trust, Delhi — to bring inclusive, bilingual e-learning to 40+ hearing-impaired students. I build with an AI-first workflow — using Claude, ChatGPT, DeepSeek and Mistral AI, and integrating AI agents — to design, code, debug and ship production software far faster than a traditional solo developer could. I am dedicated to expanding access to inclusive, equitable, genuinely good education.
13+Years in education
2012NGO founded
5Products built solo
4,000+Learning pages shipped
Selected work
An EdTech ecosystem, built solo.
Five products and two platforms — from a full e-learning portal to a symbolic maths engine and a game that turns arithmetic into an adventure. I design, code, deploy and maintain all of it.
Vidaara
Live
Flagship · E-learning portal
A free, ad-free e-learning portal for Class 1–12 and competitive exams (SAT, CAT, SSC CGL, CTET, JEE, NEET, IMO). Thousands of MCQs, full mock tests, interactive labs, an AI study tutor, a Q&A forum and language learning — all rendered with textbook-quality KaTeX maths.
What we built on Vidaara:
66,000+ practice questions and full-length mock tests spanning Class 1–12 and every major exam (SAT, CAT, SSC CGL, CTET, JEE, NEET, IMO) — each with a detailed, step-by-step solution.
A native, dependency-free graphing and scientific calculator built from scratch (Desmos-style) — no third-party libraries, fully CSP-safe.
Paste-a-question homework helper: type any textbook question and instantly get its worked solution via full-text search over an in-house solution bank.
Interactive Virtual Labs — PhET-style Physics, Chemistry and Biology simulations (projectile motion, circuits, genetics, ecosystems) on zero-dependency HTML canvas.
In-browser coding courses that run real Python (Skulpt), SQL (sql.js) and R (WebR) live in the browser, plus an HTML/CSS playground, for Computer Science Grades 5–12.
Textbook-quality mathematics everywhere via KaTeX, with hundreds of hand-authored inline-SVG diagrams for geometry and science.
An AI Study Tutor using retrieval with a human-in-the-loop (no costly live-LLM calls) and a community Q&A forum with structured, math-aware answers.
Bilingual (English + हिंदी) accessibility: a hover-glossary for difficult words, text-to-speech, WCAG-AA contrast, full dark mode and mobile-first responsive design.
Installable Progressive Web App with offline support, backed by a read-only public Content API that also powers the companion Flutter mobile apps.
Enterprise-grade engineering — Helmet CSP, rate limiting, self-hosted CAPTCHA, MySQL-backed sessions, world-class SEO (dynamic sitemaps, JSON-LD, IndexNow) and a live donor/CSR impact dashboard — all built solo, free and ad-free.
A paid AI-plus-expert homework service: a student submits any assignment, an AI drafts a fully worked solution, a subject-matter expert reviews and refines it, and the AI then incorporates the expert's feedback before final human approval — pairing AI speed with human-verified accuracy. Backed by a private in-house bank of 12,000+ NCERT and OpenStax questions with step-by-step solutions (Maths, Science and English, Grades 5–12, India CBSE + US curriculum).
A complete learning-management system (SaaS) for teachers, students, parents and admins — course builder, homework and assignment workflows, an auto-graded quiz engine, live online classes (video), per-child parent progress reports and admin approvals. It lets any school or private tutor run their entire classroom digitally on Vidaara’s infrastructure.
A mathematics engine that solves K-12, SAT, JEE, CAT, GRE and Olympiad problems step by step — a deterministic, rule-based symbolic solver built on a structured knowledge base of formulas, identities and theorems. It powers the maths across Vidaara.
A math RPG for children (Grades 3–8) where maths is the weapon — solve a sum, cast the spell, beat the monster. Designed to make daily practice feel like play. Playable on the web now; an Android build is on the way.
The full Vidaara learning portal in your pocket — study material, mock tests and practice for Class 1–12 and competitive exams, served by a read-only public Content API. Available now on Google Play.
13+ years of original, LaTeX-authored mathematics content for K-12 and competitive exams — notes, worksheets, practice papers and e-books, all written and published independently.
The Delhi non-profit I founded in 2012 — free coaching, digital learning, books, food, metro passes and even accommodation for underprivileged students chasing engineering and academic dreams.
Independently conceived, designed, built and deployed a free, full-stack e-learning portal on Node.js, Express, EJS (SSR) and MySQL; deployed on Hostinger with Cloudflare DNS and HTTPS.
Authored all STEM content in LaTeX and rendered it with KaTeX across thousands of pages — including a complete 21-chapter NEET Physics course, JEE tracks, and SAT/CAT/SSC/CTET exam prep.
Built an auto-scoring mock-test engine, an AI tutor, a moderated Q&A forum, interactive labs, a learner dashboard (progress, certificates, badges) and a multi-language module (CEFR A2–B2) with a 1,300+ word bilingual vocabulary bank.
Engineered SEO end-to-end: dynamic sitemap (4,000+ URLs), JSON-LD structured data, Open Graph cards, full server-side rendering — verified in Google Search Console.
Hardened the app with Helmet CSP, rate limiting, MySQL-backed sessions and server-side validation; added PWA (offline + installable), text-to-speech and a mobile-first responsive design.
Built companion Flutter apps (Ankora, Words of Vidaara, the Vidaara app) served by a read-only public Content API.
Founder
2012 – Present
Udgam Welfare Foundation (NGO)
Left a corporate career in 2012 to give underprivileged children the engineering dreams I could not pursue myself — founding and leading the foundation end to end.
Delivered years of free Mathematics coaching for JEE aspirants; provided free books, stationery, food, metro passes and even accommodation at my own home so no student dropped out for lack of money.
Launched a free AI-assisted e-learning platform during COVID-19 (2020) to keep students learning, and partnered with The Lepra India Trust to support 40+ hearing-impaired students with inclusive, bilingual Maths & English content.
Ran the full NGO operation: curriculum, volunteer coordination, partnerships with schools and Olympiad bodies (SOF/IMO), monitoring, reporting and donor communication.
Mathematics Content Developer (LaTeX)
2011 – Present
MathStudy.in
Created comprehensive, curriculum-aligned Mathematics content for K-12 and competitive exams, authored entirely in LaTeX.
Designed and published interactive e-books with step-by-step solutions, practice problems and visual aids — independently designed, maintained and distributed.
Administration & Operations roles
2002 – 2012
Intelenet, Bharti Telesoft (Airtel), R Systems, vCustomer, Omam
A decade in corporate administration and operations — MIS analysis, budgeting, SOP adherence, facilities and vendor management — before moving fully into education.
Education
Degrees
M.Sc. MathematicsShobhit University, Meerut
2014
B.Ed.Maharishi Dayanand University, Rohtak
2010
PGDBM (Human Resource)IMT Ghaziabad
2008
M.A. EnglishDr. B. R. Ambedkar University, Agra
2003
B.Com (P)University of Delhi
1999
Certifications
Google Data AnalyticsGoogle / Coursera
2021
Data ScienceJohns Hopkins University / Coursera
2021
Recognition
Awards
2017
Dr. A.P.J. Abdul Kalam AwardPresented by the Delhi CM, Lt. Smt. Sheila Dixit
For contributions to education and social upliftment.
2016
Human Excellence AwardGlobal Foundation for Human Excellence
For empowering underprivileged children to pursue engineering.
2015
Social Reformer AwardPlus Approach Foundation
For educational work with underprivileged children; invited speaker at India Habitat Centre.
Research & publications
Writing on inclusive, AI-assisted learning.
An AI-Driven Approach to Developing Free, Inclusive and Engaging Digital Learning Resources for Hearing-Impaired and Economically Disadvantaged Students
A framework using AI to create adaptive, personalised learning materials for inclusive education.