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The Next Chapter When I left the waiter job and returned to engineering, I knew I wanted something different. Not just a different job, but a different way of working. The kind where your location does not limit the problems you can solve. I found that in Thailand, working for a South African company called Exonic. Why Bangkok After Dubai, I wanted somewhere with a lower cost of living where I could build runway while working remotely. Bangkok checks that box. The city is a hub for remote engineers. The internet is fast. The infrastructure works. The street food is better than any restaurant I have ever worked in. I arrived with a laptop and a clear goal: find a remote role where I could work on meaningful projects without being tied to a physical office. Landing the Role at Exonic Exonic is a technology consulting company based in South Africa. They serve clients across multiple industries and geographies. When I found the opening, it matched exactly what I was looking for: full time remote, exposure to diverse projects, and the chance to work across the full stack. The interview process was practical. System design discussions, technical assessments focused on AWS and modern frontend frameworks, and conversations about how I approach end to end delivery. I got the offer and accepted it immediately. As a full time remote employee, I was embedded in Exonic's engineering team. My day to day involved building cloud native solutions for their clients, designing architectures on AWS, and shipping production systems across the entire stack. The team was distributed, and the work required communicating clearly across time zones. Three Continents Through One Company Exonic's client base spans the globe. Over my time there, I built production systems touching three different continents. One project was Scoring AI , a voice enabled match scoring application for sports courts. Players start a match, share a link, and control the scoreboard using voice commands. I worked on th

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Request lifecycle: một HTTP request đi qua đâu, và vì sao "quên gọi next()" làm request treo cho tới khi socket timeout Một request tới một Express hay Fastify server không phải là "gọi handler rồi trả về response". Nó là một chuỗi các bước theo thứ tự cố định: parse HTTP, chạy qua middleware/hook, match route, gọi handler, serialize, gửi response, đóng. Nếu bất kỳ bước nào không chuyển tiếp — Express không gọi next() , Fastify hook không reply.send() hay không return — request treo cho tới khi client hoặc server timeout đóng socket. Đây là loại lỗi không ném exception, không xuất hiện trong error log, chỉ hiện ra qua p99 latency phình lên và số socket ở trạng thái ESTABLISHED tăng dần. Hiểu chính xác lifecycle này là điều kiện tiên quyết để debug những request "biến mất" và để đặt middleware đúng thứ tự. Cơ chế hoạt động Bước dưới cùng giống nhau ở cả hai framework: Node core http.Server nhận TCP connection, parse HTTP request line + headers, phát event request với hai object IncomingMessage (req) và ServerResponse (res). Điểm khác nhau là những gì framework làm giữa lúc nhận request và lúc response ra khỏi socket. Express dựng một chuỗi middleware qua Router . Mỗi lần app.use(fn) hay app.get(path, fn) được gọi, Express bọc fn vào một Layer với path regex (thông qua path-to-regexp ) rồi push vào một stack. Khi request đến, Router.handle duyệt stack tuần tự: với mỗi layer, nếu path match, gọi fn(req, res, next) . next() là closure trỏ vào layer kế tiếp; chỉ khi nó được gọi thì layer sau mới chạy. Error handler được nhận diện bằng arity — hàm 4 tham số (err, req, res, next) — và chỉ được duyệt tới khi next(err) được gọi: import express from ' express ' const app = express () app . use ( express . json ({ limit : ' 1mb ' })) // 1. parse body app . use (( req , _res , next ) => { // 2. request id req . id = crypto . randomUUID () next () }) app . use (( req , _res , next ) => { // 3. auth const token = req . headers . authorization if ( ! token ) return next ( new Erro

Transaction lifecycle trong Postgres: BEGIN mở state machine, COMMIT đóng — quên đóng là dò mìn Một transaction trong Postgres không phải chỉ là cặp BEGIN ... COMMIT cú pháp; nó là một state machine sống cùng connection. BEGIN đẩy connection từ idle sang active , mỗi statement kết thúc đẩy nó về idle in transaction đợi statement kế tiếp, một statement lỗi đẩy sang idle in transaction (aborted) , và chỉ COMMIT / ROLLBACK mới trả connection về idle . Dev gặp lifecycle này trong việc thật không phải vì cú pháp khó mà vì một BEGIN quên COMMIT trong một code path lỗi: connection nằm trong pool ở idle in transaction vô thời hạn, giữ snapshot và lock, chặn autovacuum , kéo lock chain, làm bảng update-nóng bloat dần rồi cả service chậm chết. Cơ chế hoạt động Mặc định mỗi connection ở autocommit mode : mỗi statement là một transaction tự đóng. BEGIN (hoặc START TRANSACTION ) tắt autocommit cho tới khi gặp COMMIT / ROLLBACK . Trong khoảng đó connection có một xid (cấp khi cần ghi) và một snapshot, và lifecycle của nó đi qua các trạng thái mà Postgres phơi ra trong pg_stat_activity.state : idle — connection mở, không có transaction nào đang chạy. active — đang thực thi một statement (kể cả ngoài transaction block). idle in transaction — đang trong transaction block, vừa chạy xong một statement, đợi statement kế tiếp hoặc COMMIT / ROLLBACK . idle in transaction (aborted) — đang trong transaction, một statement đã ném lỗi, mọi statement tiếp theo trả ERROR: current transaction is aborted, commands ignored until end of transaction block cho tới khi ROLLBACK . fastpath function call / disabled — ít gặp, không phải mục tiêu của bài này. -- t0: state = 'idle' BEGIN ; -- t1: state = 'idle in transaction' (vừa thực thi xong BEGIN, đợi statement kế) INSERT INTO orders ( user_id , total ) VALUES ( 42 , 100 ); -- trong lúc chạy: state = 'active' -- sau khi statement xong: state = 'idle in transaction' lại INSERT INTO orders ( user_id , total ) VALUES ( NULL , 100 ); -- ERROR: null value

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Most devs spend all day fixing broken layouts in the browser. Why not fix the one in your actual office? I started treating my desk setup like a refactor project. It turns out, you can actually optimize your physical space with some basic data. Measuring the vibe Data-driven design just means using actual inputs to pick your furniture and paint. Don't guess. Measure your natural light exposure or run a quick script to test your color schemes. Color matters. The American Society of Interior Designers claims blues and greens drop stress by 70%. I don't know if that number is perfect, but I switched my wall to a soft sage and feel less fried at 5 PM. If you want to check the dominant colors in your room, use this bit of Python. import numpy as np from PIL import Image def analyze_color_palette ( image_path ): img = Image . open ( image_path ) img = img . convert ( ' RGB ' ) pixels = np . array ( img ) dominant_color = np . mean ( pixels , axis = ( 0 , 1 )) return dominant_color # Example usage: image_path = ' path/to/image.jpg ' dominant_color = analyze_color_palette ( image_path ) print ( dominant_color ) Pathfinding for your chair Furniture layout often feels like a guessing game. You move the desk, hit your knee on the shelf, and move it back. You can treat your room like a graph problem instead. Use Dijkstra’s algorithm to map the walking paths between your printer, desk, and coffee machine. If your path length is high, your layout is bad. class Graph { constructor () { this . vertices = {}; } addVertex ( vertex ) { this . vertices [ vertex ] = {}; } addEdge ( vertex1 , vertex2 ) { this . vertices [ vertex1 ][ vertex2 ] = 1 ; } dijkstra ( start ) { const distances = {}; const previous = {}; for ( const vertex in this . vertices ) { distances [ vertex ] = Infinity ; previous [ vertex ] = null ; } distances [ start ] = 0 ; const queue = [ start ]; while ( queue . length > 0 ) { const vertex = queue . shift (); for ( const neighbor in this . vertices [ vertex ]) { con

For some people, the ice in a beverage is almost as important as the drink itself. That’s the audience Govee had in mind when designing its latest ice maker, the GoveeLife Smart Nugget Ice Maker Pro. This $500 premium smart home gadget is aimed at those who crave what’s called “the good ice,” the soft, chewable […]

Michael Webster discusses the rise of headless AI agents and their impact on software delivery pipelines. He shares how massive, AI-generated pull requests create a severe bottleneck for human reviewers and introduce persistent technical debt. Learn how engineering leaders can leverage test impact analysis and automated validation pipelines to verify agentic output without sacrificing stability. By Michael Webster

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If you write software for a living and you're considering a trip to China in 2026, the friction you'll hit is not what you expect. The Great Firewall is the headline, but it's rarely what trips up a first-time visitor. What actually breaks your week is the small stuff: a QR code at a noodle shop, a metro turnstile that won't take your foreign card, a hotel Wi-Fi that quietly drops every request to Google. This is a brief survival guide written from a developer's mindset: what's actually changed in 2026, what you can fix before you leave, and what you should just accept. 1. Visa-free entry now covers most Western devs As of late 2025, China extended its 30-day visa-free transit policy to passport holders from 38 countries, including the US, UK, Germany, France, Australia, the Netherlands, and most of the EU. If you're flying in for a vacation, a conference, or even a short remote-work stretch, you may not need to apply for a visa at all — you just need an onward ticket within 30 days. The catch: the rules per nationality drift quarterly, and the official guidance is scattered across embassy pages. I keep a more current breakdown here: FirstTripChina visa-free guide — worth checking the week you book your ticket. 2. The payment problem is the real "API" you need to integrate China runs on two payment rails: Alipay and WeChat Pay. Cash is technically legal but vendors below the level of a 4-star hotel will look at you like you handed them a stone tablet. Foreign credit cards work at airports and big chains; they do not work at the dumpling place you actually want to eat at. The fix that exists in 2026 — and that did not exist three years ago — is "Tour Card" inside Alipay and "International" mode inside WeChat Pay. Both let you link a Visa/Mastercard issued outside China and pay via the same QR system locals use. Setup steps (roughly): Install Alipay (App Store / Play Store, US/EU regions both work). Verify with passport + selfie (KYC takes about 3 minutes). Tap Tour C

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Sitting at a desk for hours? Upgrade your WFH setup and work in style with these comfy WIRED-tested seats.

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