Available for B2B & Freelance Projects

Hi, I'm Nikola Radojević

Senior Fullstack Software Engineer

I design, build, and maintain production web and mobile products for international clients—from backend architecture and third-party integrations to polished user experiences and deployment. My core stack includes React, Node.js, PHP, Laravel, and MySQL.

Serbia (Remote Worldwide)

Founder @ Imagine Code

116+ Upwork Projects (5.0 ★)

Discuss a Project View Selected Work

End-to-end ownership

I can take a product from requirements and architecture through implementation, release, and ongoing production support.

Practical engineering

I connect frontend, APIs, databases, automation, and infrastructure to solve real operational problems.

Long-term partnership

I work directly with clients, communicate trade-offs clearly, and evolve software as business needs change.

Expertise

Technical Arsenal

Proficient across modern web and mobile stacks, automated workflows, and high-load backend infrastructures.

Frontend

JavaScript React Ionic Material UI Tailwind CSS

Backend & APIs

Node.js PHP & Laravel REST APIs WebSockets MySQL & SQL

Mobile

Capacitor Ionic Cordova iOS (App Store) Android (Google Play)

Python, Infra & Tools

Python Web Scraping Selenium Automation Linux / Nginx RTMP Claude / AI Workflows Git

Portfolio & Architecture

Flagship Systems & Products

End-to-end software solutions, architected, developed, deployed, and maintained by me.

Enterprise SaaS & Ops 2017 – Present

Driving School Software Ecosystem

Comprehensive technology platform managing end-to-end operational and customer-facing workflows for modern driving schools.

Student registration, customer onboarding & online payment gateways
Automated course booking integration with government portals
Instructor shift planning, salary & accounting, WhatsApp & email messaging platform
Central administration dashboards with financial reporting & analytics

PHP / Laravel MySQL React Node.js REST APIs Python3

Cross-Platform Mobile iOS & Android

Student Companion Mobile App

Cross-platform iOS and Android application synchronizing directly with the centralized driving management core.

Real-time driving lesson schedule, course history & instructor notes
In-app tuition payments, invoice receipts, and balance summaries
Driving theory quizzes & upcoming exam notifications

React Ionic Capacitor REST APIs

EdTech & Gamification Web & Mobile

Driving Theory Learning Platform

Subscription-based interactive e-learning ecosystem integrating online learning, gamification, and driving school CRM operations & analytics.

Cross-Device Experience: Responsive learning experience optimized for desktop, tablet, and mobile devices, allowing students to learn anytime, anywhere.
Engagement & Retention: Duolingo-inspired gamification with XP, rewards, achievements, streaks, and competitive leaderboards to encourage consistent learning.
Adaptive Learning: Video lessons, adaptive quizzes, official driving theory exam simulations, and personalized readiness metrics.
Secure Media Delivery: Protected image and video resources using backend authorization and Nginx access controls, restricting access to authorized users and preventing direct public access to learning content.
CRM Integration & Analytics: Email-linked learner accounts synchronize online learning activity with the central CRM, enabling unified student profiles and performance analytics.
Training Outcome Analytics: Correlates online learning performance with paid in-person course attendance and exam outcomes, providing insights into student pass rates.
Subscription Management: Automated recurring billing, subscription lifecycle management, and entitlement-based access control.

PHP / MySQL ReactJS Ionic REST API Video Streaming

Real-Time & Streaming High Concurrency

Live Online Classroom Platform

Ultra-low latency live-streaming infrastructure built for real-time remote teaching and attendance tracking.

High-performance Nginx RTMP video broadcast pipeline
Real-time WebSocket chat and interactive Q&A during broadcast
Secure token-based stream access control & attendance logging

Nginx RTMP WebSockets PHP JavaScript

Career Journey

Work Experience

Founder & Senior Fullstack Software Engineer

2019 – Present

Imagine Code · Serbia

Founded and operate software agency Imagine Code, developing and maintaining custom web and mobile software for long-term international clients. Responsible for architecture, development, third-party integrations, deployment, production support, and continuous product evolution.

Freelance Fullstack Developer

2012 – Present

Upwork / Freelancer · Global Clients

Delivered 116+ successful projects with 5-star ratings for clients across Europe, North America, and globally. Specialized in end-to-end fullstack development: React web apps, Node.js and Laravel backends, Python automation crawlers & Selenium, database performance tuning, and cross-platform mobile apps.

Languages

Serbian Native

English Professional Working

Key Highlights

14+ years working with international clients · End-to-end product ownership · AI-assisted development · Long-term B2B partner.

Ready for new challenges

Let's build something remarkable together.

Available for B2B contracts, freelance projects, technical consulting, and senior engineering roles. Let's discuss your product roadmap.

Direct Email

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