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SIKOUTRIS

PHP developer building web tools at scale. Creator of OnlineCalcAI (700+ calculators). Obsessed with performance on shared hosting.

Joined Joined on  Personal website https://onlinecalcai.com
Building a Home Renovation Quote Marketplace: Lead Generation and Contractor Matching

Building a Home Renovation Quote Marketplace: Lead Generation and Contractor Matching

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3 min read
Encoding French Employment Law in JavaScript: Severance Calculator

Encoding French Employment Law in JavaScript: Severance Calculator

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3 min read
Nursery Search Platform Architecture: Geocoding French Childcare Data

Nursery Search Platform Architecture: Geocoding French Childcare Data

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3 min read
Building a Nursery Search Platform for French Parents: Geocoding Meets Childcare

Building a Nursery Search Platform for French Parents: Geocoding Meets Childcare

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3 min read
Unit Conversion at Scale: Building a Multi-System Calculator Platform

Unit Conversion at Scale: Building a Multi-System Calculator Platform

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4 min read
Educational Calculators: How Free Web Tools Are Changing How Students Learn Math

Educational Calculators: How Free Web Tools Are Changing How Students Learn Math

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4 min read
Making Physics Accessible: Building Interactive Calculators for STEM Education

Making Physics Accessible: Building Interactive Calculators for STEM Education

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3 min read
Construction Cost Estimating: Building Developer Tools for the Building Industry

Construction Cost Estimating: Building Developer Tools for the Building Industry

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3 min read
Health Calculators Done Right: BMI, Calorie and Macro Calculators for Developers

Health Calculators Done Right: BMI, Calorie and Macro Calculators for Developers

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5 min read
Building Financial Calculators That Actually Help Users Make Decisions

Building Financial Calculators That Actually Help Users Make Decisions

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5 min read
Construire un comparateur SaaS en PHP : retour d'expérience technique

Construire un comparateur SaaS en PHP : retour d'expérience technique

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5 min read
Aides financières seniors en France : comment s'y retrouver en 2026

Aides financières seniors en France : comment s'y retrouver en 2026

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4 min read
AI Writing Tools Compared: Finding the Right Tool for Every Content Need

AI Writing Tools Compared: Finding the Right Tool for Every Content Need

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1 min read
Building a Greenwashing Scanner for EU Green Claims Directive Compliance

Building a Greenwashing Scanner for EU Green Claims Directive Compliance

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2 min read
Building DPP-Tool: Digital Product Passports for EU ESPR Compliance

Building DPP-Tool: Digital Product Passports for EU ESPR Compliance

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2 min read
How We Built Carbon Badge: A Website Carbon Calculator Using SWDM v4

How We Built Carbon Badge: A Website Carbon Calculator Using SWDM v4

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2 min read
Building an AI Marketing Tools Comparison Platform (55 Tools, 8 Categories)

Building an AI Marketing Tools Comparison Platform (55 Tools, 8 Categories)

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2 min read
How We Built a Business Startup Cost Calculator for 350+ Industries

How We Built a Business Startup Cost Calculator for 350+ Industries

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2 min read
How We Built a Free Energy Rebate Calculator for US Homeowners

How We Built a Free Energy Rebate Calculator for US Homeowners

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2 min read
How We Built MySoilType: USDA Soil Data for Every US Zip Code

How We Built MySoilType: USDA Soil Data for Every US Zip Code

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3 min read
Building a Pet Insurance Comparison Tool for the French Market

Building a Pet Insurance Comparison Tool for the French Market

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3 min read
How France's Qualiopi Certification Is Reshaping Professional Training

How France's Qualiopi Certification Is Reshaping Professional Training

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2 min read
How We Score AI Writing Quality: Building an Objective Comparison Framework

How We Score AI Writing Quality: Building an Objective Comparison Framework

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5 min read
Building an AI Tool Comparison Platform: Data Architecture and Scoring System

Building an AI Tool Comparison Platform: Data Architecture and Scoring System

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4 min read
Implementing Accurate Unit Conversions: Handling Floating Point and Edge Cases

Implementing Accurate Unit Conversions: Handling Floating Point and Edge Cases

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3 min read
Building Multi-Currency Financial Calculators: Compound Interest, Amortization and Tax Logic

Building Multi-Currency Financial Calculators: Compound Interest, Amortization and Tax Logic

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3 min read
EU Digital Product Passport: A Developer's Implementation Guide

EU Digital Product Passport: A Developer's Implementation Guide

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3 min read
Parsing USDA Soil Survey Data: Building MySoilType.com

Parsing USDA Soil Survey Data: Building MySoilType.com

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3 min read
How I Built a Carbon Footprint Badge for Websites

How I Built a Carbon Footprint Badge for Websites

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2 min read
Building a Startup Cost Calculator: Data Architecture for 100+ Business Types

Building a Startup Cost Calculator: Data Architecture for 100+ Business Types

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3 min read
Building a RIASEC Career Assessment Tool: Psychology Meets Web Development

Building a RIASEC Career Assessment Tool: Psychology Meets Web Development

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5 min read
The Economics of Calculator Content: How Free Tools Drive Organic Traffic

The Economics of Calculator Content: How Free Tools Drive Organic Traffic

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6 min read
How I Built 200+ Calculators Serving 30 Languages Without a Database

How I Built 200+ Calculators Serving 30 Languages Without a Database

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5 min read
Web Accessibility Checklist 2026: 15 Critical Checks Your Site Needs

Web Accessibility Checklist 2026: 15 Critical Checks Your Site Needs

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7 min read
How We Built a Free WCAG 2.1 Accessibility Scanner

How We Built a Free WCAG 2.1 Accessibility Scanner

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5 min read
How I Built a 148K+ Training Directory from French Government Open Data

How I Built a 148K+ Training Directory from French Government Open Data

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6 min read
67% des Français ont un animal de compagnie, mais seulement 7% sont assurés : décryptage d'un paradoxe

67% des Français ont un animal de compagnie, mais seulement 7% sont assurés : décryptage d'un paradoxe

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6 min read
How I Built a 700+ Calculator Platform with Pure PHP, Zero Frameworks, and a JSON Registry Pattern

How I Built a 700+ Calculator Platform with Pure PHP, Zero Frameworks, and a JSON Registry Pattern

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9 min read
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