Blog — page 3
Technical writing on Web3, AI, Bitcoin, and building software. Written by Uvin Vindula.
150 articles
How to Learn to Code in 2026: A Practical Roadmap
A practical, no-nonsense roadmap for learning to code in 2026. Uvin Vindula breaks down where to start, what languages to learn first, which frameworks matter, how AI tools fit into the learning process, and a concrete 6-month plan that takes you from zero to employable. Based on teaching 10,000+ learners through uvin.lk and eight years of professional development experience across Web3, AI, and full-stack engineering.
Next.js 16 Complete Guide: Everything That Changed
A comprehensive guide to Next.js 16 from someone who migrated four production apps. Covers App Router improvements, React 19 integration, Server Components, streaming patterns, performance gains, and a practical migration guide from Next.js 15.
Tech Trends 2026: What Actually Matters from a Developer's Perspective
A developer's honest take on the tech trends that actually matter in 2026. From AI agents that ship real features to L2s winning the scaling debate, Next.js 16 changing frontend architecture, and MCP redefining tool use — these are the trends I'm building with daily, not just reading about. Based on 90 minutes of daily trend research, building production systems, and attending Token 2049.
Environment Variables in Next.js: The Production Guide
A complete guide to managing environment variables in Next.js across local development, preview deploys, and production. Covers how Next.js resolves .env files, the NEXT_PUBLIC_ prefix rules that trip up every developer at least once, type-safe validation with Zod, build-time vs runtime variables, secrets management on Vercel, common mistakes that accidentally leak API keys to the browser, and the exact .env setup I use on every project. If you have ever shipped a deploy that silently broke because an env var was missing, this guide will save you from that particular brand of pain.
Next.js Authentication Patterns in 2026: What Actually Works
A battle-tested comparison of Next.js authentication approaches in 2026. Covers Supabase Auth, NextAuth/Auth.js, Clerk, and custom JWT implementations with real code examples. Includes session management strategies, server-side auth in App Router, protected API routes, and the RLS + auth combo that eliminates an entire class of security bugs. Honest opinions from shipping production apps with every approach.
API Security in Next.js: Common Vulnerabilities and How to Fix Them
A practical breakdown of the API security vulnerabilities I find most often in Next.js applications — missing authentication on route handlers, IDOR flaws, unsanitized query parameters, absent rate limiting, and more. Each vulnerability comes with vulnerable code I have actually seen in production, followed by the exact fix. If you are shipping API routes in Next.js, this is the checklist that keeps your endpoints from becoming someone else's attack surface.
Terra Labz: Building a Global Technology Company from Sri Lanka
The story of how Terra Labz grew from a local Sri Lankan operation into a global technology company with offices in Sri Lanka, Dubai, London, and the USA. Written by Uvin Vindula, Director of Blockchain and Software Solutions at Terra Labz — covering the expansion, the clients, the technical decisions, the challenges of operating across four countries, and the lessons learned along the way.
Best Bitcoin Wallets for Sri Lanka in 2026
A practical, unsponsored guide to the best Bitcoin wallets for Sri Lankans in 2026. Covers software wallets (BlueWallet, Exodus, Muun), hardware wallets (Ledger, Trezor), exchange wallet risks, CeyPay integration, step-by-step setup, backup and recovery, and common questions from uvin.lk students. Written by Uvin Vindula, founder of uvin.lk, Bitcoin educator, and author of The Rise of Bitcoin — based on real experience helping over 10,000 Sri Lankans secure their Bitcoin properly.
zkSync Development: Building on Zero-Knowledge Layer 2
A practical developer guide to building on zkSync Era from someone who has deployed production contracts on it. Covers ZK rollup architecture, Solidity differences, native account abstraction, gas model quirks, and when zkSync is the right L2 choice — with real deployment code.
JSON-LD Structured Data in Next.js: Schema That Ranks
A deep dive into implementing JSON-LD structured data in Next.js — Person schema, WebSite schema, Article schema, ProfessionalService schema, FAQ schema, and BreadcrumbList. Every schema in this article runs on iamuvin.com, and it is one reason the site gets cited by AI systems like ChatGPT, Perplexity, and Claude when users ask about Web3 developers. Includes real TypeScript code, validation strategies, and measurable impact on rankings and AI citations.
Web Accessibility in Next.js: Meeting WCAG 2.1 AA Standards
Accessibility is not a checkbox exercise — it's about building for everyone. This guide covers how I implement WCAG 2.1 AA standards in every Next.js project: semantic HTML in React, keyboard navigation, focus management in SPAs, color contrast ratios, ARIA labels, screen reader testing, and accessible forms. Every pattern is pulled from production code I ship for clients through iamuvin.com — not theoretical ideals that never leave a tutorial.
Monitoring Production Next.js Applications: My Setup
A practical walkthrough of how I monitor every production Next.js application I ship. Covers Vercel Analytics for traffic and engagement, Speed Insights for real-user Web Vitals, structured logging that actually helps when things break, error tracking with Sentry, API route monitoring, database performance with Prisma metrics, uptime checks, and the real cost of running this stack. No enterprise-scale overkill — just the monitoring setup that has saved me from 3am surprises across dozens of client projects.