Solo builder studio · Noida, India

One solo builder. Two live products. Built end to end.

Coding30 is a solo-builder product studio. It makes MsgVibe, which turns a logo, colors and a product list into finished marketing videos, and BillKaro – Digital Dukaan, a GST billing app for India's shops.

See the products Work with me

Abhay Pratap Singh

Founder & Solo Builder

2
products live in production
8+ yrs
building software professionally
3 platforms
web, Android and a public API
100%
solo built and run

01 — Products

Two products, two very different customers.

One sells to marketing teams and developers worldwide. The other serves shopkeepers across India, from kirana stores to medical shops. Both are live and open to the public today.

MsgVibe

Web platform · Video automation

On-brand marketing videos, made automatically.

MsgVibe gives e-commerce brands, agencies and local businesses designer-made video templates that restyle themselves with your logo, colors and products. Pick a template, drop in prices and an offer, and download an HD video about a minute later. No editing software and no subscription.

Every sizeOne design renders in 9:16, 4:5, 1:1 and 16:9 for Reels, TikTok, Shorts, feed and in-store screens.
BulkUpload Excel, CSV or Google Sheets and get one video per row, for every product, branch or dealer.
REST APISend JSON, get an MP4. Add branded video to your own product, with webhooks for batch renders.
Brand kitsSave a kit per client and switch in one click. Built for agencies and multi-location brands.
Pricing3 free videos, then pay per video from $0.42. Credits never expire.

Open MsgVibe For developers Pricing

40%
OFF

Shop now

9:16

40%
OFF

Shop now

4:5

40%
OFF

Shop now

1:1

40% OFF

Shop now

16:9

One design. Four sizes. Rendered together.

BillKaro – Digital Dukaan

Android app · Billing for Indian shops

Bill, print, GST and udhaar. One app for the whole shop.

BillKaro – Digital Dukaan is an all-in-one billing app for India's kirana stores, medical shops, hardware stores and every other counter. It makes GST tax invoices and simple non-GST bills, prints them on a Bluetooth printer, and keeps customer credit, suppliers and stock in one place. Available in Hindi and English.

GST billingTax invoices with CGST, SGST and IGST, or a Bill of Supply for non-GST shops.
Print & share58mm and 80mm Bluetooth thermal receipts, A4 PDF, or the bill sent straight to WhatsApp.
UdhaarCustomer credit ledger with payment reminders over WhatsApp.
Suppliers & stockSupplier ledger and purchases, barcode scanning and low-stock alerts.
ReportsDaily sales and profit, exportable as PDF or Excel, with cloud backup.
Offer postersReady-made festival and sale posters to share with customers on WhatsApp.

Get it on Google Play BillKaro website

BillKaro – Digital Dukaan: all your shop accounts in one app, with fast billing, credit ledger, stock manager and reports

BillKaro – Digital Dukaan: bill, print, GST and credit in one place, with Bluetooth printing and multiple invoice types

02 — Capabilities

Everything between the idea and the invoice.

Nothing here is outsourced. Product design, front end, back end, cloud, payments and support are all done in-house, which keeps the products fast to change and cheap to run.

Product & interface

From the first sketch to a shipped interface, including template design systems that adapt to any brand and any aspect ratio.

React
Tailwind CSS
Android

Video rendering pipeline

Programmatic video: live in-browser preview, HD rendering in the cloud, batch jobs from spreadsheets, automatic refunds for failed renders.

Remotion
Batch rendering
Webhooks

APIs & back end

Public REST APIs with documentation, plus the services behind them. Eight years of enterprise back-end work applied to small, lean systems.

Java · Spring Boot
Python · FastAPI
REST

Cloud on AWS

Serverless-first infrastructure that scales with usage, served worldwide through a CDN and managed by one person.

API Gateway
Lambda
S3
CloudFront
DynamoDB

Payments & accounts

Sign-in, credit packs and checkout for two markets: UPI, cards and netbanking in India, PayPal and cards everywhere else.

Razorpay
PayPal
Firebase Auth

Launch & support

Play Store releases, product websites, documentation and direct customer support. Every support email is read by the person who wrote the code.

Google Play
SEO
Docs

03 — Founder

Enterprise engineer by day job. Solo builder by choice.

I'm Abhay Pratap Singh, a senior software developer and back-end architect based in Noida. I have spent more than eight years building distributed enterprise systems in Java and Python and running them on AWS.

Coding30 is where I take products the whole way myself: finding the problem, designing the interface, writing the code, wiring up payments and answering the support email. MsgVibe began in 2025 as a small message tool and was rebuilt in 2026 into the video platform it is now.

Full portfolio & résumé LinkedIn GitHub

2026
MsgVibe relaunches as a video automation platform
Templates, bulk rendering from spreadsheets and a public REST API.
2026
BillKaro – Digital Dukaan ships on Google Play
Billing, GST invoices and udhaar tracking for Indian shops.
2025
First version of MsgVibe goes live
It started as a simple WhatsApp message generator.
2018 — now
Senior Software Developer, ENSOWT
Leading end-to-end delivery of distributed enterprise applications.
2017 — 18
Software Developer, Northcorp Software
E-commerce and pathology systems on Spring and Hibernate.
2014 — 17
Master of Computer Application
Dr. RML Awadh University, Ayodhya.

04 — Contact

Let's talk.

Tell me which of these you are and I'll reply personally. Every message reaches me directly.

Investors & partners

Back or distribute the products

Interested in MsgVibe or BillKaro as an investment, a reseller or an integration partner? I'm happy to walk you through the product and the roadmap.

support.coding30@gmail.com

Hiring teams

Bring me onto your team

Open to senior back-end, full-stack and product engineering roles, and to selected contract work. The portfolio has the full experience and stack.

awesomeabhaysingh88@gmail.com View portfolio

Customers

Get help with a product

Using MsgVibe or BillKaro and stuck, or have a feature request? Write in. Support comes straight from the developer.

support.coding30@gmail.com MsgVibe contact page