Konstantin Kelle

Develop backend services for the business-focused platform of MAX Messenger using Go, Java and PHP/KPHP. Contribute to production backend engineering, service maintenance, and technical collaboration in a large technology organization.

Founded and led a software development company, managing an engineering team delivering a software platform for a fuel station network. Oversaw backend services, mobile applications, and integrations with payment gateways and fuel dispensing equipment.

Developed backend functionality for a production platform handling 4,000+ requests per second; project details are under NDA.

Independently developed backend functionality for a gas-station network mobile application, including payment-acquiring integration and fuel-dispenser equipment APIs. Built loyalty and bonus features, barcode flows, push notifications, and an administration interface.

Worked on a high-load product serving millions of users, coordinating with a large engineering team and other departments; details under NDA.

Developed websites for gaming projects.

Developed marketplace and freelance-platform solutions.

Bachelor's studies in Computer Science and Information Technology, expected completion in 2028.