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buildbyalex

About

Alex Shuvalov.A developer who understands business.

Short version: I build products that make money for my clients. Long version below.

Alex Shuvalov — портрет

My name is Oleksandr Shuvalov — Alex in work contexts. I'm an independent senior fullstack developer. Based in Warsaw, working with clients worldwide: Poland, Ukraine, EU, US, occasionally further.

I build three kinds of products: production websites (Next.js, multilingual, SEO baked in), AI agents (RAG assistants, sales bots, function-calling automations) and mobile apps (iOS + Android from a single Expo codebase). Before going solo I worked as a fullstack engineer in product companies and as a founder in my own businesses — that 'understands code + understands money' mix shapes how I run projects.

Clients often struggle with agencies for one reason: there are five layers between them and the person writing the code. Account, project, product, lead, junior. Decisions take weeks. I work without those layers — you message me directly, I write the code myself, I respond within hours. Not for everyone, but for MVP-to-mid-size projects it's noticeably faster and cleaner.

What I work with

Frontend

  • Next.js 15
  • React 19
  • TypeScript
  • Tailwind CSS
  • Motion / Framer
  • next-intl

Backend

  • Node.js
  • Express
  • Edge Functions
  • Firestore
  • Supabase
  • PostgreSQL
  • pgvector

AI

  • OpenAI / GPT
  • Anthropic / Claude
  • Google Gemini
  • Function calling
  • RAG (pgvector / Pinecone)
  • LangChain (selectively)

Mobile

  • React Native
  • Expo SDK 52
  • Swift (native modules)
  • Kotlin (native modules)
  • RevenueCat
  • Expo Push

Infra

  • Vercel
  • Cloudflare
  • GitHub Actions
  • Sentry
  • Upstash Redis
  • EAS Build

Languages

  • Русскийnative
  • Українськаnative
  • EnglishB2+, fluent at work
  • PolskiB1, conversational for meetings and contracts

Location

Warsaw, Poland. I work with clients worldwide on EU / US-friendly hours.

Where to find me

Let's talk?

30-minute call, no commitment. Tell me what you need, I'll tell you honestly if I'm the right fit.

About — Alex Shuvalov, independent developer — buildbyalex