Practical writing on software engineering, AI tooling, and solo-founder strategy — from someone actually building and shipping.
Featured articles
TechSee all →
- GPT-6 Astra: What the Benchmarks Actually Show
- Unreal MCP: How Claude Code Now Drives the Unreal Editor Directly
- When Do AI Glasses Developer Platforms Actually Open? A 2026 Timeline
- 3D Gaussian Splatting vs Unreal Engine: Two Ways to Build a 3D World - and Where Each One Ships
- LLMs Inside Unreal Engine: The New Skills Game Developers Need in 2026
BusinessSee all →
- The Duolingo Founder Story: Luis von Ahn, a Green Owl, and the Plan to Make Education Free
- The Midjourney Founder Story: David Holz, the Company That Took No VC Money, and the $500M Bootstrap
- The Figma Founder Story: Drones, a Meme Generator, and the $20 Billion Deal That Got Blocked
- The Spotify Founder Story: How Daniel Ek Beat Free Music by Being Faster Than Theft
- The Stripe Founder Story: Two Brothers From Limerick and Seven Lines of Code
InvestmentSee all →
- Elon Musk's X Money Says It Will Pay You 6% on Savings. Is It Too Good to Be True?
- Commercial Real Estate Investing: The Complete Guide
- Samsung vs SK Hynix: the HBM battle that will decide Korea's AI chip future
- The end of jeonse and what it means for renters in Korea
- TSMC and the AI chip bottleneck Wall Street can't price correctly
Common SenseSee all →
- ISA: the Korean tax-free savings account most people don't use
- This Summer's Heat Wave: Key Points of the 2026 Vulnerable Population Protection Plan
- Majoring in AI or Software? Don't Miss the New AI Academic Incentive Student Loan
- Today's Financial Benefit: 2026 Small Business Stability Voucher (Up to 250,000 KRW)
ReadingSee all →
8 Sep
GPT-6 Astra: What the Benchmarks Actually Show
5min25 Aug
Weekly Retrospective - Last Week of August, 2026
2min25 Aug
Unreal MCP: How Claude Code Now Drives the Unreal Editor Directly
5min25 Aug
When Do AI Glasses Developer Platforms Actually Open? A 2026 Timeline
4min12 Jul
Weekly Retrospective - July Week 2, 2026
1min6 Jul
Weekly Retrospective - July Week 1, 2026
1min6 Jul
The Duolingo Founder Story: Luis von Ahn, a Green Owl, and the Plan to Make Education Free
7min6 Jul
3D Gaussian Splatting vs Unreal Engine: Two Ways to Build a 3D World - and Where Each One Ships
7min2 Jul
LLMs Inside Unreal Engine: The New Skills Game Developers Need in 2026
5min2 Jul
The Midjourney Founder Story: David Holz, the Company That Took No VC Money, and the $500M Bootstrap
5min2 Jul
Living With Claude Fable 5: How the Most Capable Model Changes the Way You Actually Work
5min29 Jun
Luma's Bet: From Video Generator to a Single Model That Thinks in Pixels
5min29 Jun
The Figma Founder Story: Drones, a Meme Generator, and the $20 Billion Deal That Got Blocked
5min28 Jun
Weekly Retrospective - June Week 4, 2026
1min28 Jun
The Spotify Founder Story: How Daniel Ek Beat Free Music by Being Faster Than Theft
7min26 Jun
The Best AI Video Models in 2026: Types, Differences, and Where This Is All Going
6min25 Jun
Claude Fable 5 and Mythos 5: What the New Models Change, and How They Perform
5min24 Jun
The Stripe Founder Story: Two Brothers From Limerick and Seven Lines of Code
5min24 Jun
The Replit Founder Story: From a Browser Hack in Amman to a Billion-Dollar IDE
5min22 Jun
Elon Musk's X Money Says It Will Pay You 6% on Savings. Is It Too Good to Be True?
4min22 Jun
The Nvidia Founder Story: A Denny's Booth, a Sega Bailout, and 30 Days From Death
6min22 Jun
Anthropic Shipped Its Most Powerful Claude Yet - Then the US Government Pulled the Plug
5min21 Jun
Weekly Retrospective - June Week 3, 2026
1min20 Jun
When You Should NOT Use Sub-Agents
6min20 Jun
The Notion Founder Story: Noodles, Kyoto, and a Rewrite That Saved the Company
6min20 Jun
From Agent Engineering to Harness Engineering to Loop Engineering
6min20 Jun
Commercial Real Estate Investing: The Complete Guide
10min19 Jun
How to Research Your App's Target Audience (With Real Examples)
5min18 Jun
Why Developers Leave Claude for Open-Source Models
5min18 Jun
From Side Project to Acquisition: The Moltbook Story
4min18 Jun
MCP, Skills, Hooks, Sub-agents: What They Are and How to Choose
5min18 Jun
Back to Basics: LLM, RAG, and GraphRAG
4min18 Jun
My personal CLI-replacement tool for running multiple MVPs solo-should I open-source it?
2min17 Jun
Kubernetes vs AWS Lambda: When Serverless Actually Saves You Money
4min17 Jun
Google Colab CLI: Notebooks Finally Meet the Terminal
4min16 Jun
Samsung vs SK Hynix: the HBM battle that will decide Korea's AI chip future
3min16 Jun
Ray-Ban Meta vs. Oakley Meta AI Glasses: Features, Differences, and How to Try Them In-Store
7min16 Jun
The Future of the XR Industry: Where AR, VR, and AI Converge
8min16 Jun
What's New in Apple Intelligence: The 2026 Update Guide
9min16 Jun
SDKs and Developer Skills for AI Glasses Content Creation
9min15 Jun
US-Iran Ceasefire Talks and the Fuel Surcharge Effect
5min15 Jun
Neural 3D Rendering: NeRF, Gaussian Splatting, and the Tools That Power Them
10min14 Jun
Weekly Retrospective - June Week 2, 2026
2min14 Jun
AR/VR/XR Device Landscape: 2026 Overview
6min13 Jun
The end of jeonse and what it means for renters in Korea
3min13 Jun
TSMC and the AI chip bottleneck Wall Street can't price correctly
3min12 Jun
ISA: the Korean tax-free savings account most people don't use
3min12 Jun
Seoul's apartment shortage and why reconstruction takes so long to fix it
3min11 Jun
Korea's new mortgage rule: why landlords can't roll over their loans anymore
2min11 Jun
The Nvidia market worth watching now isn't data centers - it's robots
2min10 Jun
What to Check During a Property Visit: Real Info That Photos Don't Show
3min10 Jun
Why Did the Space Sector Suddenly Collapse? June's Selloff Explained
3min10 Jun
This Summer's Heat Wave: Key Points of the 2026 Vulnerable Population Protection Plan
3min10 Jun
What should I need to do as an IT Company owner
1min9 Jun
Majoring in AI or Software? Don't Miss the New AI Academic Incentive Student Loan
2min9 Jun
600M KRW Mortgage Cap: In 2026, Real Estate Comes Down to Loans
2min9 Jun
Big Tech's Data Center Spending This Year Is Not 725 Trillion Won - It's Dollar-Scale
2min8 Jun
Today's Financial Benefit: 2026 Small Business Stability Voucher (Up to 250,000 KRW)
2min8 Jun
Where Are Home Prices Now? Mid-2026 Korean Real Estate Check-In
2min8 Jun
Google Unveils Gemini Omni - A Turning Point in AI Video Generation
2min7 Jun
Weekly Retrospective - June Week 1, 2026
1min3 Jun
Why do some people always lack money, while others become richer?, The money-making wisdom of the Babylonian rich
7min1 Jun
My Experience Using All 7 Major Korean Blogging Platforms
5min1 Jun
The Money Book, How to Create a Money System
7min31 May
Key lessons learned from Seino’s teachings
3min31 May
Weekly Retrospective - May Week 5, 2026
1min30 May
Complete Office Contract Checklist - 15 Things You Must Check Before Stamping
4min30 May
Register your business, don’t delay, invest just 30 minutes
4min29 May
Is an agreement to end the US-Iran war imminent? 60-day ceasefire MOU
3min29 May
Secondary battery market in 2026, where is it now?
3min28 May
Migrating from Permanent Access Tokens to Token Exchange - Why Order Matters
3min26 May
Why the 2026 US midterm elections are important for Crypto
5min26 May
SpaceX, space technology, U.S.-related stocks and domestic stocks
2min26 May
SpaceX IPO listing news and Starship V3 12th test flight success
3min26 May
Weekly Retrospective - May Week 2, 2026
1min26 May
Weekly Retrospective - May Week 1, 2026
1min26 May
Weekly Retrospective - April Week 4, 2026
1min26 May
Weekly Retrospective - April Week 1, 2026
1min24 May
Startup & Product Glossary: Terms Every Solo Founder Should Know
8min23 May
Context Management - How I Do It Now
3min22 May
Claude Code Routines vs Cowork Schedule - What's the Difference?
4min20 May
Create a PM task automation agent with local LLM + Claude Code
9min10 Nov
Flutter review
12min25 Feb
Deepening Flutter asynchronous tasks
3min21 Feb
Dart basic grammar
9min1 Feb
DVA-C02 Preparation Material 5 - Event Handling & Data Streaming
5min1 Feb
DVA-C02 Preparation Material 4 - Network & CICD
8min1 Feb
DVA-C02 Preparation Material 3 - Security & Logging & Monitoring
6min1 Feb
DVA-C02 Preparation Material 2 - Storage
6min1 Feb
DVA-C02 Preparation Material 1 - Server & Serverless
4min4 Jan
Part 13. Learn about AWS - Security, ETC at once
7min3 Jan
Part 12. AWS at a glance - SAM, CDK, Cognito, Other Serverless Services
5min1 Jan
Part 11. AWS at a glance - API Gateway, CICD
6min31 Dec
Part 10. AWS at a glance - DynamoDB
5min29 Dec
Part 9. AWS - Lambda at a glance
8min28 Dec
Part 8. AWS at a glance - CloudWatch, CloudTrail
5min19 Dec
Part 7. Learn about AWS at once - SQS, SNS, Kinesis
6min18 Dec
Part 6. AWS at a glance - Elastic Beanstalk, CloudFormation
5min17 Dec
Part 5. Learn about AWS at once - ECS, ECR, Copilot, EKS
3min16 Dec
Part 4. AWS at a glance - S3, CloudFront
5min15 Dec
Part 3. Learn about AWS at once - Route53, VPC
4min13 Dec
Part 2. Learn about AWS at once - ELB, ASG, RDS, Aurora, ElastiCache
5min12 Dec
Part 1. Learn about AWS at once - IAM, EC2, EC2 Instance Storage
9min12 Dec
Getting started with AWS, all at once
4min11 Dec
Transactional annotation
4min11 Dec
test double
3min11 Dec
Software Development Methodology
5min11 Dec
Understanding query tuning
7min11 Dec
About Python
5min11 Dec
Leetcode 100
65minWhat does Lief Tech cover? Backend engineering with Spring Boot and Python, cloud infrastructure, AI-powered product development, stock market analysis, real estate, and personal finance.
Who writes Lief Tech? A software engineer and founder with hands-on experience across backend systems and solo product operations. New posts several times a week.