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.

Lappeenranta, Finland Joined on Oct 12, 2025 https://iurii.rogulia.fi

Education

Self-taught developer with 25+ years of professional experience

Pronouns

he/him

Work

Senior Full-Stack Developer & Freelancer, Finland

Pinned

Iurii Rogulia

Feb 24

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

#pdf #security #forensic #fraud

8 min read

Iurii Rogulia

Aug 10

When a Human Is Your Integration

#business #integration #operations #decision

6 min read

Want to connect with Iurii Rogulia?

Create an account to connect with Iurii Rogulia. You can also sign in below to proceed if you already have an account.

Create Account

Already have an account? Sign in

Iurii Rogulia

Aug 10

PDF Generator Fingerprints: What Software Made This File (And Where It Lies)

#pdf #webdev

11 min read

Iurii Rogulia

Aug 10

Build vs Buy: VAT Validation via VIES or an API

#tax #webdev

9 min read

Iurii Rogulia

Aug 8

PDF Integrity Report: July 2026

#pdf #fraud #webdev

8 min read

Iurii Rogulia

Aug 7

Preventing Overselling: Inventory Locks Under Concurrent Checkouts

#nextjs #typescript #node #postgres

10 min read

Iurii Rogulia

Aug 7

How Lenders Verify Bank Statements — and the Forgery Layer They Miss

#pdf #fintech #webdev

11 min read

Iurii Rogulia

Aug 7

How to Bulk Re-Validate Customer VAT IDs

#tax #webdev

9 min read

Iurii Rogulia

Aug 5

Programmatic SEO with hreflang: One Joke, 17 Languages, Server-Rendered

#javascript #node #express #programmaticseo

9 min read

Iurii Rogulia

Aug 5

PDF Tamper Detection API for Ruby on Rails: Integration Guide

#pdf #tutorial #api #fraud

17 min read

Iurii Rogulia

Aug 5

What Is a VAT ID? A Plain Guide

#tax #tutorial #europe #webdev

7 min read

Iurii Rogulia

Aug 3

Your Software Works, But Nobody Can Safely Change It

#business #legacy #modernization #decision

7 min read

Iurii Rogulia

Aug 3

PDF Tamper Detection API for C#: ASP.NET Core Integration Guide

#pdf #tutorial #api #fraud

18 min read

Iurii Rogulia

Aug 3

VAT ID Format vs Valid: What a Real Check Confirms

#tax #tutorial #webdev

8 min read

Iurii Rogulia

Jul 31

Gated B2B Pricing in Next.js: Hiding Prices Behind Per-Customer Access

#nextjs #react #typescript #postgres

10 min read

Iurii Rogulia

Jul 31

TamperCheck Alternative: Deterministic PDF Tamper Detection

#pdf #fintech #api #forensics

13 min read

Iurii Rogulia

Jul 31

Validate VAT Numbers at Signup Without Blocking

#tax #webdev

9 min read

Iurii Rogulia

Jul 29

Subscription Billing: The Edge Cases Stripe Docs Skip

#nextjs #typescript #node #postgres

13 min read

Iurii Rogulia

Jul 29

Klippa Alternative: A Self-Serve PDF Tamper Detection API

#pdf #fintech #api #forensics

12 min read

Iurii Rogulia

Jul 27

Hiring Your First Developer: 5 Questions That Filter Out 80%

#fractionalcto #hiring #engineeringmanagement #startup

11 min read

Iurii Rogulia

Jul 27

VerifyPDF Alternative: Structural PDF Tamper Detection API

#pdf #fintech #api #forensics

11 min read

Iurii Rogulia

Jul 24

Webhook Security Beyond the Signature Check

#nextjs #typescript #node #api

11 min read

Iurii Rogulia

Jul 24

Ocrolus Alternative: A Self-Serve PDF Tamper Detection API

#pdf #fintech #api #forensics

11 min read

Iurii Rogulia

Jul 24

Validate Polish VAT Numbers (NIP) in Node.js

#tax #webdev

10 min read

Iurii Rogulia

Jul 23

Fortiro Alternative: A Self-Serve PDF Tamper Detection API

#pdf #fintech #api #forensics

10 min read

Iurii Rogulia

Jul 22

Why 'Two Weeks' Always Means Six — and How to Estimate Honestly

#fractionalcto #projectmanagement #softwareestimation #engineeringpractice

12 min read

Iurii Rogulia

Jul 22

Resistant AI Alternative: PDF Tamper Detection API

#pdf #fintech #api #fraud

9 min read

Iurii Rogulia

Jul 21

Snappt Alternative: A Self-Serve PDF Fraud Detection API for Rental & Beyond

#pdf #fintech #api #fraud

8 min read

Iurii Rogulia

Jul 20

PDF Tamper Detection API for Java: Spring Boot Integration Guide

#pdf #tutorial #api #webdev

17 min read

Iurii Rogulia

Jul 20

Feature Flags Without LaunchDarkly: A 100-Line Solution

#typescript #node #postgres #saas

11 min read

Iurii Rogulia

Jul 19

Adobe Producer Spoofing: A PDF Metadata Forgery Case Study

#pdf #forensics #webdev

9 min read

Iurii Rogulia

Jul 18

Isomorphic Canvas Rendering: One draw() in Browser and Node

#javascript #node #napirscanvas #express

10 min read

Iurii Rogulia

Jul 18

PDF Tamper Detection API for Go: Integration Guide

#pdf #tutorial #api #webdev

16 min read

Iurii Rogulia

Jul 17

Adding Semantic Search to Internal Docs in 200 Lines

#typescript #node #postgres #ai

11 min read

Iurii Rogulia

Jul 17

SBA-7a Loan Stip Fraud Detection: Post-PPP Lessons

#pdf #fintech #fraud #api

9 min read

Iurii Rogulia

Jul 16

My Checklist for Reviewing AI-Generated Code

#aicoding #codereview #engineering #webdev

13 min read

Iurii Rogulia

Jul 16

PDF Integrity Report: June 2026

#pdf #fraud #webdev

8 min read

Iurii Rogulia

Jul 15

When AI Beats a Senior Developer — and When It Doesn't

#aicoding #engineering #productivity #webdev

10 min read

Iurii Rogulia

Jul 15

Crypto OTC Proof-of-Funds PDF Fraud Detection

#pdf #fintech #fraud #webdev

9 min read

Iurii Rogulia

Jul 14

Idempotency Keys: Building Retries That Don't Double-Charge

#typescript #node #postgres #api

12 min read

Iurii Rogulia

Jul 14

Workers Comp Fraud: Altered Medical and Wage PDFs

#pdf #fintech #fraud #api

9 min read

Iurii Rogulia

Jul 13

Deterministic Wrong: Why a Viral Web Toy Must Be Wrong the Same Way Every Time

#javascript #viralproduct #algorithms #webdev

9 min read

Iurii Rogulia

Jul 13

Large PDFs in Node.js Without Unbounded Buffering

#pdf #tutorial #node #webdev

11 min read

Iurii Rogulia

Jul 12

Stripe to Mollie Migration: What Actually Breaks

#nextjs #typescript #node #drizzle

16 min read

Iurii Rogulia

Jul 12

Tenant Screening SaaS: Bank Statement Fraud Detection

#pdf #fintech #api #fraud

11 min read

Iurii Rogulia

Jul 11

Build an Internal CRM on Supabase: A Weekend-Scale Guide

#nextjs #typescript #drizzle #postgres

16 min read

Iurii Rogulia

Jul 11

Auto F&I Fraud: Forged Pay Stubs in Dealer Financing

#pdf #fintech #fraud #api

13 min read

Iurii Rogulia

Jul 10

Rewrite or Stabilise: The Decision Framework I Use

#rescueprojects #technicalstrategy #legacycode #architecture

9 min read

Iurii Rogulia

Jul 10

PDF Tamper Detection API for Laravel and PHP: Integration Guide

#pdf #tutorial #api #webdev

20 min read

Iurii Rogulia

Jul 9

Multi-Tenant SaaS Database Design: Shared Schema vs Schema-per-Tenant

#typescript #node #drizzle #postgres

14 min read

Iurii Rogulia

Jul 9

Batch PDF Verification at Scale: Async Queue Patterns for the HTPBE API

#pdf #tutorial #api #fraud

18 min read

Iurii Rogulia

Jul 8

HubSpot to Custom CRM Migration: When It's Worth It

#crm #migration #hubspot #operations

17 min read

Iurii Rogulia

Jul 8

PDF Tamper Detection in Next.js: App Router Integration Guide

#pdf #tutorial #nextjs #api

15 min read

Iurii Rogulia

Jul 7

How to Reduce OpenAI API Costs in Production (2026 Guide)

#ai #costoptimization #production #observability

19 min read

Iurii Rogulia

Jul 7

Building a Document Fraud Detection Workflow for Fintech: Beyond KYC

#pdf #tutorial #fraud #api

10 min read

Iurii Rogulia

Jul 6

Best Headless CRM in 2026: Twenty vs EspoCRM vs Custom Build

#crm #opensource #architecture #buildvsbuy

16 min read

Iurii Rogulia

Jul 6

Insurance Claims Fraud: How Altered PDFs Bypass Adjuster Review

#pdf #fintech #fraud #forensics

9 min read

Iurii Rogulia

Jul 5

Technical Due Diligence Checklist Before a Software Rewrite

#rescueprojects #technicalduediligence #engineeringpractice #bestpractices

13 min read

Iurii Rogulia

Jul 5

Payslip Fraud in HR: How Fake Salary Documents Pass Review

#pdf #fintech #fraud #forensics

9 min read

Iurii Rogulia

Jul 4

I Built a 30-Line Chrome Extension to Kill the YouTube Feed

#javascript #html #css #chromeextension

8 min read

Iurii Rogulia

Jul 4

Invoice Fraud in Accounts Payable: Detect Altered PDFs Before Payment

#pdf #fintech #fraud #api

9 min read

1 Week Community Wellness Streak

Writing Debut

Want to connect with Iurii Rogulia?