Engineer and researcher. Notes on AI, security, software, finance, and open source.https://mohammadjamiu.com/https://mohammadjamiu.com/articles/arr-revenue-run-rate-is-not-cash/https://mohammadjamiu.com/articles/arr-revenue-run-rate-is-not-cash/When a company says it has ‘$200M ARR,’ founders often picture a vault. Here is a calmer breakdown of run-rate, cash, burn, and why businesses raise money even when revenue looks large on paper.Sun, 07 Jun 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/what-startup-unicorn-means/https://mohammadjamiu.com/articles/what-startup-unicorn-means/Founders and headlines throw around ‘unicorn.’ It almost never means the company makes a billion dollars a year in revenue or profit — it marks a private valuation threshold, usually set during a funding round.Sun, 07 Jun 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/year-one-vs-legacy-operator-mindset/https://mohammadjamiu.com/articles/year-one-vs-legacy-operator-mindset/Looking at industrial giants and feeling behind is common among ambitious builders. The pain is real — but the comparison is often structurally unfair. Here is a calmer frame: trajectories, eras, and what ‘enough’ can mean at your scale.Sun, 07 Jun 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/cursor-vs-api-ai-coding-workflow/https://mohammadjamiu.com/articles/cursor-vs-api-ai-coding-workflow/Why I started moving away from Cursor and Claude Code subscriptions toward API-based AI coding workflows using DeepSeek, Kimi, and OpenCode — and what changed in how I think about cost and model choice.Sat, 06 Jun 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/fix-kimi-k2-api-key-invalid-opencode/https://mohammadjamiu.com/articles/fix-kimi-k2-api-key-invalid-opencode/Getting "The API Key appears to be invalid or may have expired" when using Kimi K2.5 or K2.6 in OpenCode? Here is the exact fix that worked for me using Moonshot AI instead of the Kimi Coding provider.Sat, 06 Jun 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/halal-nigeria-halal-vs-riba/https://mohammadjamiu.com/articles/halal-nigeria-halal-vs-riba/How halal returns differ from riba, with Sukuk, mudarabah, and Nigerian platforms — and why a projected return is not the same as guaranteed interest.Sat, 06 Jun 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/halal-nigeria-investnaija-stock-guide/https://mohammadjamiu.com/articles/halal-nigeria-investnaija-stock-guide/A practical step-by-step for the InvestNaija app in Nigeria: KYC, funding your account through Paystack, placing a buy order, how fees differ from riba, and what to double-check before you trade.Sat, 06 Jun 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/halal-nigeria-one17-halal-fund/https://mohammadjamiu.com/articles/halal-nigeria-one17-halal-fund/An educational overview of One17’s Shariah-compliant mutual fund: asset types, common Islamic contracts, fees, allocation ranges, and how to subscribe.Sat, 06 Jun 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/halal-nigeria-one17-mutual-fund-how-to/https://mohammadjamiu.com/articles/halal-nigeria-one17-mutual-fund-how-to/Step-style notes: subscribing to the One17 halal fund, tracking NAV, redemption rules, and habits that help new mutual-fund investors stay steady.Sat, 06 Jun 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/halal-nigeria-series-overview/https://mohammadjamiu.com/articles/halal-nigeria-series-overview/A growing set of notes on riba, halal vs interest-based returns, One17’s halal fund, InvestNaija walkthroughs, and a Nigeria-focused stock tracker — for Muslims and anyone investing ethically.Sat, 06 Jun 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/halal-nigeria-stock-tracker/https://mohammadjamiu.com/articles/halal-nigeria-stock-tracker/A snapshot table of selected NGX names with halal screening notes, AAOIFI-style ratio rules, and a simple dividend purification formula — refresh prices and ratios before you trade.Sat, 06 Jun 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/halal-nigeria-what-is-riba/https://mohammadjamiu.com/articles/halal-nigeria-what-is-riba/A concise note on what riba means in Islamic finance, with simple examples and how it differs from profit from real risk.Sat, 06 Jun 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/llms-closing-education-gaps-africa/https://mohammadjamiu.com/articles/llms-closing-education-gaps-africa/AI language models are transforming learning globally — but they're mostly built for the Global North. Here's how we can make them genuinely useful for African students.Wed, 20 May 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/web-security-every-developer-must-know/https://mohammadjamiu.com/articles/web-security-every-developer-must-know/A practical walkthrough of the vulnerabilities that break real applications — OWASP Top 10, injection attacks, authentication failures — and how to write defensively from day one.Tue, 28 Apr 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/building-technical-products-in-africa/https://mohammadjamiu.com/articles/building-technical-products-in-africa/Infrastructure gaps, payment friction, low bandwidth, and distrust of digital systems — and why none of that should stop you from building things that matter.Sat, 14 Mar 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/islamic-finance-riba/https://mohammadjamiu.com/articles/islamic-finance-riba/Breaking down the concept of riba (interest) in Islamic finance and why prohibition exists beyond just religious obligation.Tue, 10 Mar 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/pdfjs-vs-react-pdf/https://mohammadjamiu.com/articles/pdfjs-vs-react-pdf/A breakdown of the relationship between pdfjs-dist and react-pdf, and why understanding the dependency tree matters.Fri, 20 Feb 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/naval-ravikant-wealth/https://mohammadjamiu.com/articles/naval-ravikant-wealth/Key takeaways from Naval's podcast episodes on wealth creation, leverage, and specific knowledge.Thu, 05 Feb 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/imam-ghazali-revival-notes/https://mohammadjamiu.com/articles/imam-ghazali-revival-notes/Key insights from reading Imam Ghazali's Ihya Ulum al-Din and how they apply to modern life and entrepreneurship.Wed, 28 Jan 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/pdfjs-dist-vs-pdf-parse-for-ai-tools/https://mohammadjamiu.com/articles/pdfjs-dist-vs-pdf-parse-for-ai-tools/Both extract text from PDFs; one is a full engine with layout and workers, the other is a quick dump. I picked sides for an AI reading assistant.Sat, 17 Jan 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/timing-readiness-startup-ideas/https://mohammadjamiu.com/articles/timing-readiness-startup-ideas/After a virtual talk with startup investor Greg Fox: why timing can matter more than idea, team, model, or funding—and what readiness means for builders, with lessons from global giants and Nigeria’s ecosystem.Sat, 17 Jan 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/why-i-started-edtech/https://mohammadjamiu.com/articles/why-i-started-edtech/The story behind building in the education technology space in Nigeria and the problems I'm trying to solve.Thu, 15 Jan 2026 00:00:00 GMThttps://mohammadjamiu.com/articles/publishing-first-paper/https://mohammadjamiu.com/articles/publishing-first-paper/The story of how my friends and I published our first academic paper and what I learned about research, collaboration, and persistence.Wed, 10 Dec 2025 00:00:00 GMThttps://mohammadjamiu.com/articles/database-indexes-are-a-tradeoff/https://mohammadjamiu.com/articles/database-indexes-are-a-tradeoff/Indexes speed reads until they slow writes and eat RAM. I finally internalized ‘frequently queried’ as a design choice, not a checklist.Mon, 22 Sep 2025 00:00:00 GMThttps://mohammadjamiu.com/articles/sequential-vs-parallel-async-work/https://mohammadjamiu.com/articles/sequential-vs-parallel-async-work/Parallelizing everything is tempting. Some pipelines only work in order — payments and balances taught me that the hard way.Fri, 15 Aug 2025 00:00:00 GMThttps://mohammadjamiu.com/articles/hash-caching-for-ppt-generation/https://mohammadjamiu.com/articles/hash-caching-for-ppt-generation/Regenerating slides with pptxgenjs on every request was slow. Hashing the input and reusing the stored file when nothing changed made the API feel instant.Sun, 20 Jul 2025 00:00:00 GMThttps://mohammadjamiu.com/articles/nextjs-opengraph-image-file-convention/https://mohammadjamiu.com/articles/nextjs-opengraph-image-file-convention/Next only picks up certain names for social images. I used og-image.jpg and wondered why previews broke until I read the convention list.Sun, 01 Jun 2025 00:00:00 GMThttps://mohammadjamiu.com/articles/mongodb-ttl-indexes-and-atlas-limits/https://mohammadjamiu.com/articles/mongodb-ttl-indexes-and-atlas-limits/TTL is the right hammer for expiring documents, but storage, indexes, and delete load still count on small clusters like Atlas M0.Mon, 12 May 2025 00:00:00 GMThttps://mohammadjamiu.com/articles/nextjs-scroll-to-top-on-route-change/https://mohammadjamiu.com/articles/nextjs-scroll-to-top-on-route-change/Client-side navigation can leave you halfway down the new page. A small effect tied to the pathname fixes it when you want a fresh scroll each time.Sat, 05 Apr 2025 00:00:00 GMThttps://mohammadjamiu.com/articles/switching-package-managers-lockfiles/https://mohammadjamiu.com/articles/switching-package-managers-lockfiles/Each tool writes its own lockfile. Mix them and you get phantom bugs. Here is the cleanup ritual I use when I change my mind mid-project.Mon, 10 Mar 2025 00:00:00 GMThttps://mohammadjamiu.com/articles/shadcn-preset-url-powershell-ampersand/https://mohammadjamiu.com/articles/shadcn-preset-url-powershell-ampersand/Copy-pasting the init command from the UI failed on Windows because & splits commands. Triple-quoting the URL fixed it.Fri, 17 Jan 2025 00:00:00 GMT