Muyiwa Johnson

Product engineer building systems for education, governance, and digital finance.

About

Based in Nigeria. Building at Valdymas Intelligence. Shipping NYSC Verify across states. Founder of studentFirst and Ocelot Africa. Instructor at University of Ilorin.

Stack & craft

Product systems
TypeScript
Go
React
Python
Search & retrieval
Postgres
AWS
Docker
Kubernetes
Redis

Work

Selected work

All work

NYSC Verify

Product engineer

Multi-state identity verification and payments for corps members. Three live state portals:

studentFirst

Founder / Product engineer

Past questions, CBT practice, and school news across A-Level and O-Level tracks: JUPEB, IJMB, WAEC, NECO, and JAMB.

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Ocelot Africa

Founder / Product engineer

Multi-channel communications platform: SMS, Email, and WhatsApp via API or dashboard for African businesses.

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Writing

Latest writing

All writing

2026-10-03

CSS infinity in calc()

CSS now has infinity, -infinity, and NaN inside math functions. How to use them for pills, stacking, open clamps, and a number-to-boolean trick, with working examples.

css
frontend
design

2026-07-12

Hidden Allocations in Go Hot Paths

Why hot paths in Kubernetes, Prometheus, and Hugo prefer strings.Builder and strconv over += and fmt.Sprintf—with links to the actual code and PRs.

go
golang
performance

2026-01-15

How to Add Telegram Bot Notifications to Your Web Application

A quick tutorial on integrating Telegram bot notifications into your web application. Learn how to create a bot, get your chat ID, and send notifications from your server-side code using the Telegram Bot API.

telegram
bot
notifications

2026-01-12

Cloudflare R2 with Next.js: Public File Storage (Part 1)

Part 1 of a series on using Cloudflare R2 with Next.js. Learn how to set up R2 buckets, configure custom domains, and implement public file upload, delete, and retrieval operations using the S3-compatible API.

cloudflare
r2
nextjs