Blog
Development, infrastructure, SEO, AI and IT for business — short and to the point.
1495 articles
- Mobile development4 min
Backend for a Mobile App: Firebase, Supabase or Custom Server
For an MVP a ready-made backend like Firebase or Supabase usually wins because it saves months of work; a custom server becomes necessary when business logic grows complex, integrations multiply or the law requires personal data to stay in-country, with self-hosted Supabase as a middle ground.
Basics - Marketing & analytics4 min
How to Run an A/B Test Correctly: From Hypothesis to Result
A sound A/B test starts with a hypothesis and one primary metric chosen before launch. You then calculate the sample size in advance, don't stop the test early, and record the outcome in an experiment log, even when it is negative.
Practice - Design & UX4 min
Layout Grids in UI Design: Columns, Gutters, Margins
A layout grid is an invisible structure of columns, gutters and margins that every element aligns to, and it keeps designs consistent while making the move to code predictable.
Basics - Telegram & messengers3 min
How Telegram Bots Work in Groups: Privacy Mode and Admin Rights
By default a bot in a group runs in privacy mode and sees only commands, replies to its own messages and service events; to receive every message, turn privacy mode off in BotFather or make the bot an admin.
Basics - E-commerce & CRM5 min
Split Payments for Marketplaces: How Payouts to Sellers Work
A split payment lets a gateway accept one charge and distribute it by rules between sellers and the platform fee, holding funds until the order is fulfilled; it requires a gateway with marketplace support and a legal setup where the platform does not hold other people's money without the right to.
Advanced - Security4 min
Rate Limiting and Brute-Force Protection for Login and APIs
Limit attempts both per IP and per account, prefer growing delays and a CAPTCHA after a few failures over hard lockouts, store counters in a shared store like Redis, and add a coarse limit in nginx on top.
Practice - Databases & data4 min
Primary Key vs Foreign Key: Relationships in Databases
A primary key uniquely identifies each row in its own table, while a foreign key is a column that points to a primary key in another table; together they build relationships between tables and let the database block links to rows that do not exist.
Basics - Hosting & cloud4 min
Multi-Region Hosting: Building a Site That Survives Outages
Multi-region hosting means a running copy of your app in another region plus automatic traffic failover; start with active-passive and move to active-active only when downtime costs more than double infrastructure and harder data handling.
Advanced - IT careers4 min
IT Professions Explained: How to Choose Your Direction
The main IT roles are developer, QA engineer, designer, PM, DevOps and data analyst; choose based on which daily tasks you enjoy solving, not on what is trending.
Basics - Tools & no-code5 min
Building Internal Apps Without Code: Glide, Softr, AppSheet
Glide, Softr and AppSheet turn a Google Sheet or Airtable base into a working internal app in days; Glide is the fastest for mobile-style apps, Softr for portals on Airtable, AppSheet for Google Workspace teams and field work.
Practice - IT by industry4 min
Hotel Revenue Management: How Dynamic Pricing Works
Dynamic pricing changes room rates based on demand signals to maximize RevPAR — revenue per available room — rather than occupancy or average rate alone.
Advanced - Networks & office IT4 min
Site-to-Site vs Remote Access VPN: Differences and Use Cases
A site-to-site VPN permanently links whole networks, such as a head office and a branch, through routers, while a remote access VPN connects individual employees from their laptops and phones through a client app.
Basics - IT for business3 min
IT Park Uzbekistan: What Residency Means for IT Businesses
IT Park residency is a special legal and tax regime for IT companies in Uzbekistan: preferential taxation, easier work with foreign clients and ecosystem support. Always check current terms on the official IT Park website.
Basics - Web development4 min
Micro-Frontends: When Splitting a Frontend Makes Sense
Micro-frontends split one interface into parts that different teams build and deploy independently; they solve an organizational problem and are almost always overkill for a single small team.
Advanced - SEO3 min
Keyword Cannibalization: How to Detect and Fix It
Cannibalization happens when several pages on your site compete for one query and split its signals; you find it in Search Console and fix it by merging pages, using canonicals or re-targeting them to different queries.
Practice - DevOps4 min
Kubernetes Autoscaling: HPA, VPA and Cluster Autoscaler
HPA changes the number of pods, VPA changes each pod's CPU and memory requests, and Cluster Autoscaler adds or removes nodes; combine HPA with Cluster Autoscaler, and do not let HPA and VPA act on the same resource metric.
Advanced - AI & automation3 min
How to Choose an Embedding Model for Search and RAG
Choose an embedding model by its results on your own documents and questions, not by a general leaderboard: build a small test set, run 2–4 candidates and compare how often the right passage lands in the top results.
Practice - Programming3 min
How the JavaScript Event Loop Works: Tasks and Microtasks
JavaScript runs on one thread: first synchronous code, then every microtask (promises, await), and only then the next task (setTimeout, events).
Advanced - Mobile development4 min
What Drives the Cost of a Mobile App
A mobile app's cost is the team's working hours, and those hours are driven by the number of platforms, native versus cross-platform development, the backend and admin panel, integrations, offline mode, design complexity, App Store and Google Play requirements and support after release.
Basics - Marketing & analytics4 min
Incrementality Testing: How to Measure the True Effect of Ads
Incrementality is the difference in conversions between people who saw an ad and a comparable group who did not. It can only be measured with an experiment, such as a holdout group, a geo test or a platform lift study, because attribution also credits ads with purchases that would have happened anyway.
Advanced - Design & UX4 min
Loading States in UI: Spinners, Skeletons and Progress Bars
Choose a loading indicator by expected wait: under a second show nothing, a few seconds use a skeleton or spinner, longer waits need a progress bar with a clear status. Always design error, timeout and partial-loading states too.
Practice - Telegram & messengers4 min
Telegram Business Features: Hours, Quick Replies and Chatbots
Telegram Business turns a personal account into a work account: it shows your hours and location, sends greeting and away messages automatically, offers template quick replies and lets you connect a bot that answers customers on your behalf.
Basics - E-commerce & CRM4 min
Marketplace Unit Economics: How to Calculate Profit per SKU
Profit per unit is the actual selling price minus every cost one sale creates, including returns, ads and taxes; calculate it per SKU, or best-sellers can hide losses.
Practice - Security4 min
RBAC vs ABAC: How to Design Roles and Permissions in an App
Start with RBAC — roles that bundle named permissions — and add ABAC-style rules only where access depends on data, such as "own deals" or "deals of my branch", always checking both on the server.
Practice
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