04/2023 - 02/2026

Development and maintenance of monitoring infrastructure and web applications. Working with Node.js on Nest.js framework, TypeScript, and modern cloud technologies. Connecting the monitoring core with web and mobile applications via API built on Nest.js framework.

• Ownership of internal API
• Leading a small team
• Responsibility for functionality of internal system and public API

01/2024 - 11/2025

Virtual betting platform where players could bet on real matches with real odds, leaderboards were created based on success rate, and top positions were paid out in virtual currency.

• CTO and responsibility for development
• Complete architectural solution for the entire platform, backend with GraphQL API, frontend web application in Next.js and React Native app
• CI/CD pipelines on GitLab

09/2020 - 12/2022

Worked on an internal application that allows IT services employees to create and manage servers. Development of an internal logging application.

• Server management was written in PHP, historical legacy code
• Development of internal logging application completely from scratch, used by entire DHL IT services
• Managing permissions, who has access to which logs, multi-tenant application

03/2020 - 04/2021

Founded and managed a company focused on developing a mobile app for ordering and delivering cut flowers. I developed the complete infrastructure from BE API, Stripe payment gateway integration, Liftago delivery integration, and Abra accounting software connection.

• Founded and led the company from concept to launch
• Developed complete backend API using Nest.js
• Integrated Stripe payment gateway for secure transactions
• Built React Native mobile application for iOS and Android
• Connected with Liftago for delivery logistics
• Connected ABRA accounting system

08/2017 - 03/2020

Led the backend development team. Designed and implemented scalable APIs and microservices using Node.js and MongoDB. Working for the NanguTV streaming platform.

• Led backend development team for NanguTV streaming platform
• Designed and implemented scalable microservices architecture
• Built GraphQL APIs for efficient data fetching
• Managed PostgreSQL and MongoDB databases

11/2015 - 08/2016

Helped the team transition from PHP to Node.js, rewrote internal APIs, and started developing JavaScript backends.

• Led migration from PHP to Node.js backend
• Rewrote internal APIs for improved performance
• Mentored team members on JavaScript development

01/2014 - 10/2015

Led technical strategy and development of a Backend-as-a-Service platform. Managed development team and infrastructure. Built the API, FE developer dashboard, mobile app, and SDK for iOS and Android.

• Defined technical strategy for Backend-as-a-Service platform
• Managed development team and project timelines
• Built REST API and WebSocket real-time features
• Developed SDK for iOS and Android platforms
• Created frontend developer dashboard

11/2012 - 09/2013

Developed social media analytics tools. Built data pipelines and APIs using Node.js.

• Developed social media analytics tools
• Built data pipelines for processing social media data
• Created REST APIs using Node.js and MongoDB