Ljubomir Vasić

Senior Full Stack Developer & Systems Architect

Core Skills

Architecture & InfrastructureNX Monorepo, System Design, Microservices, Docker, High-Load Performance, Redis Caching, Technical Documentation

Backend EngineeringNode.js (NestJS, Express), PHP, MeteorJS, TypeORM, RabbitMQ/BullMQ, RESTful APIs, WHMCS

DatabasesPostgreSQL, MariaDB, MongoDB, Redis (Pub/Sub), Database Schema Design

Frontend & UINext.js, React, Angular, AngularJS, Tailwind CSS, SASS/LESS, UI/UX Performance

Mobile DevelopmentFlutter/Dart, Ionic, Cordova, Cross-platform Optimization

2019 — 2025

Architected and developed the 'Cloud Quality Solution', a high-concurrency platform for issue tracking and resolution.
Engineered the 'Equal Pay' system from the ground up, managing everything from initial planning to complex database schema design.
Managed technical documentation and led task delegation for new project phases.
Mentored team members to ensure architectural standards and code quality using NX monorepo structures.

2017 — 2019

Maintained and optimized global web platforms with a focus on high availability.
Developed and integrated custom WHMCS modules to automate billing and service provisioning.
Performed deep redesigns of core web pages to improve conversion rates and user performance.

A high-performance auction system designed to handle high-volume traffic and real-time data using Redis, RabbitMQ, and PostgreSQL.

National utility aggregator for the Serbian market. Built with Next.js and PostgreSQL for real-time information processing and geocoding.

Custom NPM package for visualizing code execution flows, providing foundational logic for tracing complex software pathways.

Full-stack personal finance application managing expenses, incomes, and warranties. Built with Node.js, MariaDB, and Cordova.