Vector Systems
Vector Systems
Bulgaria Trip Planner — live public transit routing across 11 cities
Plan your Trip.
Navigate Bulgaria Live!
Real-time bus, tram, trolleybus and metro routing across Sofia — plus Plovdiv, Varna, Burgas, Ruse, Sliven, Dobrich, Kazanlak, Pleven, Stara Zagora and Blagoevgrad — right in the browser
PHP · Live GTFS · Leaflet.js
🚌 Try the Trip Planner
Rocket — explore the Solar system
Launch your Rocket.
Explore the Solar System!
Fly with a rocket to explore the Solar system and its planets, right in the browser
Three.js · WebGL
🚀 Try the Rocket
Trip Planner full view
Rocket full view

Welcome to Vector Systems

Software Development & Consulting — Sofia, Bulgaria

Vector Systems Ltd. is a privately held Bulgarian company, delivering cost-effective software solutions to global and local clients.
Founded and led by Grigor Zhelev — PhD in Robotics, MSc in Computer Science — with over 15 years of senior engineering experience across fintech, enterprise and mobile platforms.

Our expertise

Salesforce / Apex / LWC Java / Spring Boot .NET 9 / C# Python / FastAPI iOS & Android (fintech) GCP / Docker / CI-CD PostgreSQL / SQL Server MySQL / Oracle Three.js / WebGL

Our solid technical foundation allows us to accomplish each project on time, within budget, and to the highest quality standards.

Get in touch View our work
Canyon Flyer — fly through a valley with an airplane
Fly through a Valley.
Test your Pilot Skills!
Navigate your airplane through a winding canyon, dodge obstacles and beat your record
Three.js · WebGL
✈️ Try Canyon Flyer
World Builder — 3D terrain, forests, cities, roads
Imagine your Dream world.
Now Build it!
Build your 3D world of terrain, forests and cities, right in the browser
Three.js · WebGL
🌍 Try the World Builder
Canyon Flyer full view
World Builder full view