O'Brien Taiwo | Blog https://obrien-adedapo.vercel.app/blog Thoughts on fullstack development, web3, backend architecture, and Go. en Wed, 24 Jun 2026 00:00:00 GMT eas-preflight: Catching Expo Bundle Size Regressions Before They Ship https://obrien-adedapo.vercel.app/blog/eas-preflight-catching-bundle-size-regressions https://obrien-adedapo.vercel.app/blog/eas-preflight-catching-bundle-size-regressions I built a free GitHub Action that diffs your Expo app's JS bundle size on every PR. Here's how it works, and three real bugs that only showed up once I stopped testing against my own machine. Wed, 24 Jun 2026 00:00:00 GMT GitHub Actions Expo React Native DevTools CI/CD Building Proposly: AI Proposals, Dual Payments, and PDF Generation https://obrien-adedapo.vercel.app/blog/building-proposly-ai-proposals-dual-payments-pdf https://obrien-adedapo.vercel.app/blog/building-proposly-ai-proposals-dual-payments-pdf How I built a full-stack proposal management platform for freelancers — Claude for AI generation and inline editing, Stripe + Paystack for subscriptions, and a Puppeteer-based PDF pipeline with auto-generated terms. Wed, 20 May 2026 00:00:00 GMT NestJS TypeScript Claude AI Stripe Paystack Next.js Building an AI News Summarizer in Go with Gemini https://obrien-adedapo.vercel.app/blog/building-an-ai-news-summarizer-in-go https://obrien-adedapo.vercel.app/blog/building-an-ai-news-summarizer-in-go How I built BriefMe — a Go API that scrapes any URL, pulls articles from NewsAPI, summarizes them with Gemini 2.5 Flash, and supports follow-up questions with conversational context. Sun, 10 May 2026 00:00:00 GMT Go AI Gemini Backend Row-Level Multitenancy in Go: What I Learned Building Proctura https://obrien-adedapo.vercel.app/blog/row-level-multitenancy-in-go https://obrien-adedapo.vercel.app/blog/row-level-multitenancy-in-go Proctura is a Go backend for a multitenant online coding exam platform — students write real code instead of pencil on paper. Here's how I designed the tenant isolation, RBAC, and Judge0 code execution. Mon, 20 Apr 2026 00:00:00 GMT Go PostgreSQL Multitenancy Backend SaaS Go for TypeScript Developers: What to Expect https://obrien-adedapo.vercel.app/blog/go-for-typescript-developers https://obrien-adedapo.vercel.app/blog/go-for-typescript-developers Coming from TypeScript, Go feels both familiar and alien at the same time. Here's what surprised me, what I liked, and what I'm still adjusting to. Sun, 05 Apr 2026 00:00:00 GMT Go TypeScript Backend Building a Production-Ready Wallet Service with NestJS and Paystack https://obrien-adedapo.vercel.app/blog/building-a-wallet-service-with-nestjs https://obrien-adedapo.vercel.app/blog/building-a-wallet-service-with-nestjs A walkthrough of the architecture decisions, trade-offs, and implementation details behind a real-world wallet service with deposits, transfers, and audit trails. Sun, 15 Mar 2026 00:00:00 GMT NestJS TypeScript PostgreSQL Paystack Backend How I Architected an NFT Marketplace on Ethereum https://obrien-adedapo.vercel.app/blog/nft-marketplace-architecture https://obrien-adedapo.vercel.app/blog/nft-marketplace-architecture Behind-the-scenes look at the smart contract design, The Graph integration, and frontend architecture of HexSea — a decentralized NFT marketplace. Fri, 20 Feb 2026 00:00:00 GMT Solidity Web3 Next.js The Graph IPFS