SaaS platforms, marketplaces and BI systems: case studies

2020 — 2025

toprentapp.com

Laflei ltd, Rome · Team Lead · toprentapp.com ↗

SaaS for fleet management and car rental companies. Built from scratch, grew to 500+ corporate clients with 20% year-over-year growth.

• —Platform from scratch to 500+ corporate clients
• —Sustained 20% year-over-year growth
• —Custom UI library with dynamic theming
• —Stripe, Firebase (auth and notifications), Cloudinary

2020 — 2025

billionrent.com

Laflei ltd, Rome · Team Lead · billionrent.com ↗

B2C car rental marketplace with external fleets integrated via API.

• —External fleet integration via API
• —Responsive embeddable booking widgets for partner sites
• —One-click website module — auto-generated landing pages for rental companies

2026

Power BI-grade analytics system

Colvir Software Solutions · Full-Stack Developer

A business intelligence system on par with Microsoft Power BI. Rebuilt the core: split the client and server sides, which delivered a noticeable performance boost.

• —AI agent for managing the app and its data — a harness with tools, subagents and a memory system
• —DuckDB on the client — analytics right in the browser
• —ClickHouse on the backend for large data volumes
• —Tokenization-based formula editor

2025 — present

egesto.ru

ИП Палиенко · Founder & Developer · egesto.ru ↗

AI platform for preparing for the Russian state English exam.

2025 — present

kvartly.com

ИП Палиенко · Founder & Developer · kvartly.com ↗

Real estate marketplace in Georgia, lead generation model.

2025 — present

palistor

Open source · Author · github.com/ProjectINT/palistor ↗

My own React framework: declarative MVVM, designed to be easy for AI agents to work with.