Software engineer & architect.

I’m Sergey, based in Nicosia, Cyprus. For 16 years I’ve designed and built software end to end — mobile apps, SaaS platforms, payment and insurer integrations, and lately AI agents that do real work in production. I’ve built 20 apps since 2014; 7 are live in the App Store, Google Play and the Microsoft Store today. I work hands-on in Flutter, TypeScript, Python, PHP and C#/.NET, build on Google Cloud and self-managed Docker servers, and ship every day with Claude Code agents. I’m CTO at DoitCare Holding, where I founded and built the One Insurance platform.

  • One Insurance app screenshot

    One Insurance

  • Skinlav app screenshot

    Skinlav

  • Oyxeka SEK app screenshot

    Oyxeka SEK

  • Cyprus Bar Association app screenshot

    Cyprus Bar Association

  • SEK Provident Fund app screenshot

    SEK Provident Fund

  • PEO Provident Fund app screenshot

    PEO Provident Fund

  • 2020 — present

    One Insurance Cyprus

    Quote, buy and manage motor, travel and property insurance end to end from a phone — no office visit, no paperwork. One Insurance is a licensed insurance intermediary supervised by the Ministry of Finance of Cyprus.

    Built for DoitCare Holding · founded and led as CTO

    • Flutter
    • TypeScript
    • Node.js
    • Google Cloud
    • Firebase
    • Vue 3
    • PostgreSQL
    • Claude API
    • Stripe

  • 2023 — present

    Skinlav

    Skin analysis from physical test strips instead of a selfie, with personalised product recommendations and an online store.

    Built for Skinlav, a Cyprus cosmetics brand · technology partner

    • Flutter
    • On-device ML
    • PyTorch
    • Next.js
    • Stripe
    • Firebase

  • 2026

    Oyxeka SEK Mobile

    Members’ app for Cyprus’s SEK trade-union confederation: news, benefits, member verification and invitations, in several languages.

    Built for SEK · delivered via InfoTEX Software Solutions

    • Flutter
    • Payload CMS
    • Next.js
    • PostgreSQL
    • Claude API
    • Docker

  • 2025 — present

    Essentio

    An EU-compliant invoicing SaaS: invoices, pro formas, credit notes, client ledgers and multi-tenant e-mail.

    Client project

    • PHP
    • Laravel
    • Vue
    • Inertia
    • PostgreSQL
    • Redis
    • Docker

Work

  1. Company
    DoitCare Holding
    Role
    Chief Technology Officer
    Date
  2. Company
    DoitCare Holding
    Role
    IT Officer, Product Lead
    Date
  3. Company
    ObjectStyle
    Role
    Software engineer & consultant
    Date
  4. Company
    Kronwerk
    Role
    IT Officer
    Date
  5. Company
    Independent & agency work
    Role
    Web & mobile development
    Date

Earlier clients include Microsoft, Barilla, and Paymentus.

All projects

Toolbox

Languages
TypeScript · JavaScript · Python · PHP · Dart · C#
Front end
React · Next.js · Vue 3 · Angular · Tailwind CSS
Back end
Node.js · Fastify · Express · Cloud Functions · Payload CMS · FastAPI · Laravel
Data
PostgreSQL · Firestore · Redis · MySQL
Cloud & infrastructure
Google Cloud · Firebase · Azure AI · AWS · Docker · Cloudflare · Sentry
Mobile & desktop
Flutter · React Native · Ionic · Windows · macOS
AI
Claude Code agents · Claude API · OpenAI · Gemini · On-device ML

Certifications