stefan.kovarbasic
ENSR
Say hello

stefan@portfolio:~$whoami

StefanKovarbašić

Frontend DeveloperBelgrade, Serbia

I build interfaces for products used by millions — from a hotel operations platform to a flight-booking giant.

open to opportunities

Get in touchDownload CV
01

about

A passionate web technology researcher, currently working for Holycode / Guestfriend. Very motivated to learn new technologies and to master the ones I already know.

I prefer working in a team environment where everybody can learn something from the others. I graduated with the highest marks. My specialties are Frontend and ReactJS, but I also use other JavaScript libraries on both the frontend and the backend.

  • 6+years of experience
  • 8companies & products
  • millionsusers reached

languages

Serbiannative
Englishadvanced

beyond code

  • chess
  • football
  • swimming
  • gymnastics
  • travelling
  • learning new things
02

experience

Where I have shipped, most recent first.

  1. 01May 2024 — Currentcurrent

    Frontend Developer

    Holycode (Guestfriend)Belgrade, Serbia

    Working on Guestfriend’s newest product — a mixture of Jira and Slack, but for hotels (staff and guests). Also developing a Patient Portal for a medical treatment system in Germany (internal product).

    • React
    • MaterialUI
    • URQL
    • Redux
    • Astro.js
    • CSS Modules
    • Nanostore
  2. 02Sep 2024 — Currentcurrent

    Frontend Developer

    FolddyRemote

    Developing the frontend of a document management system and its landing page.

    • React
    • MaterialUI
    • TanStack
    • Astro.js
  3. 03Jan 2024 — Oct 2024

    Full Stack Engineer

    MailmergicRemote

    Developing a platform that handles email templating — from Excel tables to PDF documents — saving companies precious time.

    • Node.js
    • React
    • MaterialUI
    • GCP
    • Electron
  4. 04Mar 2023 — May 2024

    Full Stack Engineer

    ClarinessBelgrade, Serbia

    Developing a platform that connects sponsors in the pharmaceutical industry with Clariness — a company offering patient recruitment services and connecting sites with sponsors in medical trials.

    • Next.js
    • React
    • MaterialUI
    • TanStack Query
    • DynamoDB
    • AWS
  5. 05Jun 2021 — Mar 2023

    JavaScript Engineer

    Kiwi.comBelgrade, Serbia

    Kiwi.com is a platform used by millions of people all over the world. I was the most responsible person for the information domain of the customer support platform that gathers a lot of services in one place.

    • React
    • TypeScript
    • Redux
    • Context
    • Node.js
    • GraphQL
    • Relay
  6. 06Aug 2020 — Nov 2023

    Indexing Specialist — Web Developer

    NDA CompanyRemote

    Maintained a platform built for web scraping, writing scripts that search for metadata in scientific publishers’ journals.

    • React
    • Node.js
    • Puppeteer
  7. 07Jun 2018 — Aug 2020

    Web Developer

    Freelance (Upwork)Remote

    Creating websites of various scales, from local companies to enterprise projects. Website maintenance, enhancements, upgrades, troubleshooting and bug fixes.

    • MERN
    • Next.js
    • GraphQL
  8. 08Sep 2018 — Jul 2021

    Platoon Commander

    Ministry of DefenseBelgrade, Serbia

    A role of great responsibility, discipline and rational thinking. Collaboration with people and a fair relationship within the collective. Maintaining a radar system for reconnaissance (hardware and software).

    • Radar systems
    • Hardware
    • Leadership
03

stack

Tools I reach for, grouped by what they do.

languages & core

  • JavaScript
  • TypeScript
  • HTML5
  • CSS3
  • SASS
  • C

frameworks & UI

  • React
  • React Native
  • Next.js
  • Astro.js
  • MaterialUI
  • CSS Modules
  • Shopify Liquid

state management

  • Redux
  • Redux Toolkit
  • React Context
  • Nanostore
  • Jotai

data & APIs

  • GraphQL
  • Relay
  • URQL
  • TanStack Query
  • REST APIs

backend & cloud

  • Node.js
  • Express
  • AWS
  • DynamoDB
  • GCP
  • Firebase
  • Supabase
  • MongoDB
  • PostgreSQL
  • Electron

tooling

  • Git
  • GitHub
  • GitLab
  • BitBucket
  • Puppeteer
  • Vite
  • Cross-browser testing
04

education

Graduated with the highest marks.

  1. Software Engineering

    2021 — 2023

    Master of Software EngineeringNiš, Serbia

    Master studies deepening knowledge in the field of software engineering.

  2. Military Academy

    2014 — 2018

    BA of Management and EngineeringBelgrade, Serbia

    Radar systems and Air Defense (GPA 8.92). Detailed study of electrical engineering and computing — from microprocessor programming and C to web development and JavaScript.

  3. Military Grammar School

    2010 — 2014

    Military Non-Commissioned OfficerBelgrade, Serbia

    Natural Sciences and Mathematics (GPA 5.00). “School for the brave”, as it was popularly known — discipline and hard work marked the schooling in this institution.

05

contact

Let’s build something.

Open to frontend and full-stack roles, contract work and interesting side projects. The fastest way to reach me is email.

Say helloDownload CV