Software developer · Zavidovići, Bosnia & Herzegovina

I build ideas into software.

React, Next.js and TypeScript. I build complete products: client websites, a live community site, and a media app of my own, each designed and built solo.

>_ one line at a time

Open to work · remote, hybrid or on-site
Portrait of Amer Ćosić

Amer Ćosić · Zavidovići, BiH

Real work

Projects with real users behind them

A client, a community, and a tool I use every day. Built solo, deployed, and maintained.

Client work
  • Astro
  • TypeScript
  • Tailwind CSS
  • SEO

Swiss Leak Control

Production website for an independent heat pump service in Switzerland. I handled the whole project solo, from concept to launch. Multi page, German language, SEO metadata, optimized images, cookie consent.

sl-control.ch
Homepage of sl-control.ch, a German language heat pump service site
Community
  • Next.js
  • TypeScript
  • Tailwind CSS

UG Ridžali-Džebe

Official website of my local community association: the annual memorial football tournament, a photo gallery, tradition, local history and the memorial dedicated to the fallen defenders of the country. I designed and built it, and I keep it live and maintained for the community.

ridzalidzebe.ba
Homepage of ridzalidzebe.ba with the illustrated football stadium
Personal tool
  • Next.js
  • TypeScript
  • Zustand
  • Vitest

Swoopt

Media downloader for YouTube, SoundCloud and Vimeo that can grab a whole playlist from a single URL. Server side download pipeline, so for now it runs locally.

localhost:3000
Swoopt interface: URL input with format and quality options

The path

Self-taught, project by project

From my first HTML page to my first client
  1. 01

    Remote marketing years

    Virtual assistant, then media buyer for international e-commerce clients. Facebook, TikTok and Google Ads. Four years of fully remote work in English.

  2. 02

    HTML and CSS foundations

    65+ certified hours: responsive layouts, flexbox, grid, Sass.

  3. 03

    JavaScript, then React

    155 certified hours across The Complete JavaScript Course and The Ultimate React Course, with Next.js and Redux.

  4. 04

    First own sites go live

    Built and launched ridzalidzebe.ba and Swoopt.

  5. 05

    BH Telekom, field technician

    Installed home internet for a few months, then chose development full time.

  6. 06

    TypeScript and a Swiss client

    Certified in TypeScript and delivered a heat pump service production site to a Swiss client.

  7. Now

    Going deeper

    Learning Node.js and React Native, building toward full stack. Open to a junior developer role, frontend or beyond: remote, hybrid or on-site.

Coursework

Where the fundamentals come from

Eleven projects built by following Jonas Schmedtmann's courses: line by line at first, then by breaking them and rebuilding them on my own. Labeled honestly, these are guided builds.

The Wild Oasis

Guided

Full admin dashboard for a cabin hotel: auth, charts, dark mode, Supabase.

  • React
  • Supabase
  • React Query

The Wild Oasis Website

Guided

Guest facing site for the same hotel, with server components and auth.

  • Next.js
  • Supabase

WorldWise

Guided

Travel log on a world map, with routing and context.

  • React
  • React Router

Fast React Pizza

Guided

Pizza ordering flow built on Redux Toolkit and React Router.

  • React
  • Redux

usePopcorn

Guided

Movie search and watchlist with custom React hooks.

  • React

Forkify

Guided

Recipe search app with its own MVC architecture and API calls.

  • JavaScript
  • MVC

Mapty

Guided

Workout tracker on a live map: geolocation plus OOP JavaScript.

  • JavaScript
  • Leaflet

Omnifood

Guided

Marketing site for a fictional food delivery startup.

  • HTML
  • CSS

Natours

Guided

Animated landing page for outdoor tours.

  • CSS
  • Sass

Trillo

Guided

Hotel booking interface laid out entirely with flexbox.

  • CSS
  • Flexbox

Nexter

Guided

Real estate landing page built entirely on CSS Grid.

  • CSS
  • Grid

Skills

What I work with

Core

  • JavaScript (ES6+)
  • TypeScript
  • HTML5
  • CSS3 / Sass

Frameworks & libraries

  • React
  • Next.js
  • Astro
  • Tailwind CSS
  • Zustand
  • Vitest

Tools & platforms

  • Git & GitHub
  • Supabase
  • Vercel
  • Netlify
  • npm

Practices

  • Responsive design
  • Component architecture
  • REST APIs
  • SEO fundamentals

Certificates

243 hours, all verifiable

Five finished courses on Udemy. Every title links to the official certificate.

In progress:Node.js, Express & MongoDB: The Complete BootcampReact Native: The Practical Guide

Contact

Let's build something.

Hiring a junior frontend developer who already ships? Or you need a website like the ones above? Email me, I read everything.

amercoski@gmail.com