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Iurii Rogulia, senior full-stack software engineer. Professionally building software since 2001.

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TMI Iurii Rogulia
VAT ID: FI29845875
DUNS: 368664211
Lappeenranta, Finland 🇫🇮

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Iurii Uses: #Better Auth

2 projects · 2 articles

Better Auth is a TypeScript-first authentication library for modern web apps. It handles sign-up, login, sessions, and OAuth providers with a type-safe API and minimal configuration.

Projects

kri.rocks – Booking Website and Online Scheduling SaaS for Beauty Businesses
kri.rocks – Booking Website and Online Scheduling SaaS for Beauty Businesses
September 28, 2026

Vertical SaaS that gives a salon, barbershop or solo beauty specialist their own booking website in minutes.

Stack

Next.jsReactTypeScriptNode.js

Libraries

HonoDrizzle ORMBetter Authnext-intlTailwind CSSpdf-libZodioredis

Databases

PostgreSQLRedis

Services

MollieResendCloudflareSentryvatnode API

Topics

SaaSMulti-TenancyOnline BookingBillingTax/VATi18nMonorepoTurborepo
vatnode.dev – EU VAT Validation API
vatnode.dev – EU VAT Validation API
January 19, 2026
vatnode.dev – EU VAT Validation API

Developer-first SaaS API for EU VAT validation via VIES with Redis caching, change monitoring, and webhook notifications.

Stack

Next.jsReactTypeScriptHonoNode.jsTurborepoDockerCaddy

Libraries

Drizzle ORMBullMQZodBetter AuthTanStack QueryZustand

Databases

PostgreSQLRedis

Services

StripeResendGoogle Analytics

Topics

SaaSAPIAuthFintechTax/VATMonorepoWebhooksSEOSchema.org

Articles

JWT vs Sessions vs OAuth: Which to Use for SaaS Auth
May 14, 2026· 15 min
JWT vs Sessions vs OAuth: Which to Use for SaaS Auth

JWT vs sessions vs OAuth for SaaS: token invalidation, mobile clients, refresh token rotation, and a decision matrix to pick the right auth pattern.

Stack

Next.jsTypeScriptNode.js

Libraries

Better Auth

Databases

PostgreSQLRedis

Topics

SaaSAuthArchitectureSecurity
Next.js SaaS Checklist: Launch Production-Ready in 8 Weeks
January 19, 2026· 17 min
Next.js SaaS Checklist: Launch Production-Ready in 8 Weeks

40+ point production SaaS checklist: auth, Stripe billing, PostgreSQL, rate limiting, email, monitoring, and security – with honest 8-week build estimates.

Stack

Next.jsTypeScript

Libraries

Drizzle ORMBetter AuthBullMQZodReact Email

Databases

PostgreSQLRedis

Services

StripeVercelResendSentry

Topics

SaaSArchitectureAuth
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