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Iurii Rogulia

I'm Iurii Rogulia — a senior full-stack developer and former CTO building production software for over 25 years. Based in Finland, working 100% remote with clients worldwide.

Location Lappeenranta, Finland Joined Joined on  Personal website https://iurii.rogulia.fi

Education

Self-taught developer with 25+ years of professional experience

Pronouns

he/him

Work

Senior Full-Stack Developer & Freelancer, Finland

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Binary PDF Modification Detection: How It Works and Where It Fails
iurii_rogulia profile

Binary PDF Modification Detection: How It Works and Where It Fails

#pdf #security #forensic #fraud
Comments
8 min read
Common PDF Editing Tools and How We Detect Their Traces
iurii_rogulia profile

Common PDF Editing Tools and How We Detect Their Traces

#pdf #forensics #api #webdev
Comments
6 min read

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How to Handle VIES Downtime in Your Application
iurii_rogulia profile

How to Handle VIES Downtime in Your Application

#tax #webdev
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3 min read
Stripe Webhooks: Idempotency, Retries, and Queue Setup
iurii_rogulia profile

Stripe Webhooks: Idempotency, Retries, and Queue Setup

#nextjs #typescript #node #bullmq
Comments
9 min read
EU VAT Rates 2026 — Complete Country-by-Country Guide for Developers
iurii_rogulia profile

EU VAT Rates 2026 — Complete Country-by-Country Guide for Developers

#tax #europe #webdev
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4 min read
How to Check a PDF Before Payment: 7-Step Checklist
iurii_rogulia profile

How to Check a PDF Before Payment: 7-Step Checklist

#pdf #tutorial #fraud #webdev
Comments
7 min read
Technical SEO for Next.js: SSR, JSON-LD, and Sitemaps
iurii_rogulia profile

Technical SEO for Next.js: SSR, JSON-LD, and Sitemaps

#nextjs #react #typescript #seo
1
Comments
3 min read
How to Report a Modified PDF to the Sender: A Professional Guide
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How to Report a Modified PDF to the Sender: A Professional Guide

#pdf #tutorial #fraud #forensics
Comments
6 min read
How to Detect Tampered PDFs (Forensics Tutorial)
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How to Detect Tampered PDFs (Forensics Tutorial)

#nextjs #typescript #pdflib #pdf
1
Comments
9 min read
Understanding PDF Metadata: What Your Documents Reveal
iurii_rogulia profile

Understanding PDF Metadata: What Your Documents Reveal

#pdf #tutorial #metadata #webdev
Comments
7 min read
How to Build a Next.js App in 30 Languages (Without Losing Your Mind)
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How to Build a Next.js App in 30 Languages (Without Losing Your Mind)

#nextjs #typescript #nextintl #i18n
1
Comments
8 min read
Why Businesses Need PDF Tamper Detection in Their Workflow
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Why Businesses Need PDF Tamper Detection in Their Workflow

#pdf #fintech #fraud #security
Comments
5 min read
Building a Multilingual RAG Chatbot for E-commerce: 1,614 Docs, 25 Languages, 70% Ticket Resolution
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Building a Multilingual RAG Chatbot for E-commerce: 1,614 Docs, 25 Languages, 70% Ticket Resolution

#nextjs #typescript #vercelaisdk #vector
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7 min read
PDF Fraud in Real Estate: Protecting Property Transactions
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PDF Fraud in Real Estate: Protecting Property Transactions

#pdf #fintech #fraud #security
Comments
7 min read
Redis Rate Limiting for APIs: Sliding Window Without the Pain
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Redis Rate Limiting for APIs: Sliding Window Without the Pain

#typescript #node #hono #ioredis
Comments
11 min read
The Anatomy of a Modified PDF: What Our Algorithm Detects
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The Anatomy of a Modified PDF: What Our Algorithm Detects

#pdf #forensics #webdev
1
Comments
7 min read
From CTO to Freelancer: What 12 Years in Technical Leadership Taught Me
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From CTO to Freelancer: What 12 Years in Technical Leadership Taught Me

#career #freelance #leadership #cto
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7 min read
Digital Signatures vs. Metadata: What Proves PDF Authenticity
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Digital Signatures vs. Metadata: What Proves PDF Authenticity

#pdf #security #metadata #fraud
Comments
7 min read
Server-Side Tracking: GA4 + Meta CAPI Without Losing 40% of Your Conversions
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Server-Side Tracking: GA4 + Meta CAPI Without Losing 40% of Your Conversions

#nextjs #typescript #googleanalytics #metacapi
1
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11 min read
Invoice Fraud: How Criminals Modify PDFs to Steal Money
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Invoice Fraud: How Criminals Modify PDFs to Steal Money

#pdf #security #fraud #webdev
2
Comments
8 min read
PDF Generation on the Server: Puppeteer vs @react-pdf/renderer (A Production Comparison)
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PDF Generation on the Server: Puppeteer vs @react-pdf/renderer (A Production Comparison)

#nextjs #typescript #node #puppeteer
1
Comments
11 min read
Has This PDF Been Edited? 5 Ways to Check Instantly
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Has This PDF Been Edited? 5 Ways to Check Instantly

#pdf #tutorial #webdev
1
Comments
7 min read
Turborepo Monorepo: Next.js 15 Frontend + Hono 4 Backend in One Repo
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Turborepo Monorepo: Next.js 15 Frontend + Hono 4 Backend in One Repo

#nextjs #typescript #hono #turborepo
1
Comments
10 min read
Detect PDF Tampering Programmatically: Developer Guide
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Detect PDF Tampering Programmatically: Developer Guide

#pdf #security #node #typescript
Comments
6 min read
5 Signs a PDF Document Has Been Tampered With
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5 Signs a PDF Document Has Been Tampered With

#pdf #security #fraud
Comments
7 min read
React Masonry Layout: Why the Popular Reorder Trick Fails
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React Masonry Layout: Why the Popular Reorder Trick Fails

#masonry #css #react #javascript
2
Comments
7 min read
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