Vedran Amidzic, Developer in Osijek, Croatia
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Vedran Amidzic

Bio

Vedran is a senior full-stack engineer with over a decade of experience building web applications for fintech, enterprise, and B2B SaaS, backed by 10,000+ hours in the Toptal network. He specializes in shipping production software at the bleeding edge of the AI-driven economy by integrating agentic workflows and AI-assisted development practices into real products. He pairs deep full-stack architecture skills with modern AI engineering.

Portfolio

B2Match
TypeScript, React, GraphQL, Apollo, Go, OpenCode, Claude Code, AI SDK, AIOps...
Paradigm Strategy Inc.
Shadcn, React, Node.js, JavaScript, Claude Code, AI SDK, Next.js, Railway...
US Company in the Field of Investment, Insurance, and Family Finances (NDA)
React, Gatsby, JavaScript, CSS, TypeScript, Front-end Development...

Experience

  • JavaScript - 10 years
  • PostgreSQL - 6 years
  • React - 6 years
  • TypeScript - 5 years
  • Next.js - 4 years
  • Claude Code - 1 year
  • OpenCode - 1 year

Preferred Environment

React, PostgreSQL, TypeScript, Next.js, Shadcn, MySQL, GraphQL, Go, Claude Code, OpenCode

The most amazing...

...thing: I contributed across six repositories and three product teams, leading framework migrations and shipping customer-facing features end-to-end.

Work Experience

Senior Software Engineer

2025 - 2026
B2Match
  • Led the React 19 and Next.js App Router migration across 5 codebases.
  • Handled multi-month Apollo GraphQL query refactor—migrated typePolicies from a monolithic Route. Shaped to per-route types via a new RouteResolver, parallelized 30+ profile/list queries, and rolled out a clean cache-version bump in production.
  • Shipped configurable meeting limits end-to-end (Go back end in b2matchd, Rails admin UI, Next.js participant surfaces) — including fixing concurrent-send overages and backfilling per-participation-type multipliers for agency-style events.
  • Owned the tickets feature that replaced legacy payment rules with ticket-based segmentation across the organizer UI, registration, and networking flows.
Technologies: TypeScript, React, GraphQL, Apollo, Go, OpenCode, Claude Code, AI SDK, AIOps, Docker, Monorepos, AI Tools, Full-stack, Workflow Automation, Claude, Agentic AI, Multi-agent Systems

Senior Full-stack Developer

2025 - 2026
Paradigm Strategy Inc.
  • Built data-driven dashboards in Next.Built responsive, data-driven dashboards in Next.js to surface key metrics and user activity at a glance.
  • Implemented reusable chart and table components with server-side data fetching for fast initial loads, and added interactive filtering and drill-down views so users could explore trends across time ranges.
  • Implemented WorkOS-backed authentication, securing sign-in and session management across the application.
  • Built an admin impersonation feature with scoped access controls and audit logging, cutting support resolution time for user-reported issues.
Technologies: Shadcn, React, Node.js, JavaScript, Claude Code, AI SDK, Next.js, Railway, PostgreSQL, Software Architecture, Agentic AI

Front-end Engineer

2021 - 2025
US Company in the Field of Investment, Insurance, and Family Finances (NDA)
  • Developed user interfaces with React and MUI as a front-end engineer.
  • Developed multiple UI components and pages as part of my role.
  • Worked with the SEO team to optimize and grow page visitors and conversions.
  • Upgraded a legacy Gatsby 2 project built with TypeScript to the latest version, significantly enhancing project performance and security.
  • Improved load speeds and efficiency by implementing modern best practices and optimizations, creating a better user experience while reducing system strain.
Technologies: React, Gatsby, JavaScript, CSS, TypeScript, Front-end Development, User Interface (UI), Design, Shadcn

Front-end Developer

2020 - 2021
Toptal
  • Created forms for a wealth management app with React, Formik, Yup, and GraphQL.
  • Built a custom React component library. Technologies used include React and Tailwind CSS.
  • Collaborated with a highly skilled agile team of developers, QA tester, PO, and UI designers.
Technologies: GraphQL, CSS, HTML, Tailwind CSS, React

Front-end Developer

2020 - 2020
Toptal Client (Field of Investment and Fintech)
  • Built a site on the Gatsby and React stack with a custom theme provided by the designer.
  • Created and connected React components to the external API provided by the client. Integrated the components to work with the Gatsby framework.
  • Connected everything with the Contentful CMS for easier content management by the client and his staff.
  • Created custom GraphQL queries and added them to Gatsby dynamic pages.
Technologies: Gatsby, GraphQL, Styled-components, React, JavaScript

Front-end Developer

2020 - 2020
Giftsy.io (via Toptal)
  • Developed theme improvements for the Giftsy.io stylesheet.
  • Created a custom swipe image gallery built with Vue and CSS Flexbox.
  • Contributed to the front end of a legacy app built on RoR and improved stylesheets for responsive web.
Technologies: CSS Grid, HTML, JavaScript, React

Front-end Developer

2020 - 2020
Client (via MVP Factory)
  • Developed the front end for a nature-and-fighting-climate-change project website.
  • Implemented animations with the Framer Motion library.
  • Created custom React components that were connected with the Prismic CMS.
Technologies: HTML, SCSS, React, JavaScript

Front-end Developer

2019 - 2020
2Amigos US
  • Developed custom websites and apps using HTML, CSS, SCSS, and React.
  • Created a website for a large SaaS-based IT infrastructure monitoring platform company.
  • Created a custom theme for a SaaS base IT infrastructure website.
Technologies: JavaScript, CSS Grid, SCSS, CSS, HTML

Freelance Front-end Developer

2018 - 2020
German Enterprise Startup in the Field of IoT, Machine, and Energy Solutions (via MVP Factory)
  • Created a UI for complex data-tables using Frontend technologies like CSS Grid, Flexbox etc.
  • Integrated static HTML and CSS code into Angular templates.
  • Worked on presentation client side sites.
Technologies: JavaScript, CSS Grid, SCSS, CSS, HTML

Freelance Senior Front-end Developer

2019 - 2019
Web Shop Agency (via MVP Factory)
  • Worked with a large team to develop a UI for client and dashboard sites of a large German B2B/B2C store.
  • Improved a current codebase which was in very bad shape, recommended to teammates to start using front-end build tools.
  • Improved the overall responsive look and theme maintainability.
Technologies: JavaScript, CSS Grid, SCSS, CSS, HTML

Freelance Front-end Developer

2018 - 2019
Insync Insurance Solutions, Ltd. (via Toptal)
  • Developed the user interface (UI) for both the front-end and agent sites.
  • Connected InSync insurance websites with REST API for viewing, selling, updating insurance policies.
  • Created a simple admin panel for displaying user data and insurance documents.
Technologies: React, JavaScript, HTML5

Freelance Front-end Developer

2018 - 2018
Client (via Toptal)
  • Created a custom web app with React and based on the Google Maps API.
Technologies: JavaScript, REST, Axios, Google Maps API, React

Freelance Front-end and UI/UX Web Developer

2017 - 2018
Yellow Letters, Inc. (via Toptal)
  • Created the UI for both the front end and the member and admin sections of the CallText web app.
Technologies: JavaScript, CSS, HTML

Magento Front-end Developer

2015 - 2017
Pinpoint Designs, Ltd.
  • Created custom webshop themes using a modular front-end approach with Sass and BEM.
  • Styled and customized popular eCommerce extensions (checkout, search, and layer navigation).
  • Created the front-end layer of custom modules for product ratings and customer satisfaction surveys.
  • Developed high profile webshops and implemented custom solutions for home-page product listings and presentations.
Technologies: JavaScript, Webpack, PostCSS, CSS, HTML

Front-end Developer

2015 - 2017
ApiWorks
  • Developed for the front-end and integrated eCommerce sites based on the Magento platform.
  • Created a modular starting theme following the BEM methodology using Sass with a Gulp task runner.
  • Debugged and tested responsive sites.
Technologies: JavaScript, Webpack, PostCSS, CSS, HTML

Freelance Developer

2015 - 2015
Freelance Work
  • Worked on the view layer of a large custom booking application developed using the Symfony framework.
Technologies: JavaScript, CSS, HTML

Front-end Developer

2014 - 2015
Gauss Development
  • Developed websites on WordPress and Magento CMS platforms.
  • Integrated custom front-end extensions for eCommerce sites.
  • Maintained and debugged both the client and server-side for WordPress and WordPress extensions.
Technologies: JavaScript, CSS, HTML

Experience

Website for a Fintech and Investment Company (NDA)

A website built with Gatsby and React, and hosted by Netlify.

I connected a website with a headless CMS (Contentful) for easier content addition or maintenance. I also created a custom React component with Axios (REST API) that tracks the prices of investment assets and reloads data with React Query.

Website for a Cloud-based Infrastructure Monitoring Platform (NDA)

Created the front end for a large website for a cloud-based infrastructure monitoring platform with React, SCSS, and Web Animations.
Worked closely with a team of remote developers and designers, and a scrum master.

Website for a Nature Restoration and Fight Climate Change Project (NDA)

On this project, I built a theme with React and Bootstrap, and Next.js framework. The content was managed by Prismic CMS. Worked closely with an Agile team of UI Designers, UX experts, and back-end developers.

Native Shoes

I developed the front-end of a custom Magento theme.

Certifications

JANUARY 2025 - PRESENT

AWS Certified Cloud Practitioner

Amazon Web Services

JANUARY 2017 - PRESENT

Certified Front-end Developer

Magento U

Skills

Libraries/APIs

React, Animate.css, Node.js, OpenAI API, Google Maps API

Tools

PostCSS, Prisma, Shadcn, Claude Code, OpenCode, Claude, Adobe Photoshop, Webpack, ITerm, Webpack 4, AI SDK

Languages

SCSS, HTML, HTML5, GraphQL, CSS, TypeScript, JavaScript, Go

Frameworks

Tailwind CSS, Next.js

Paradigms

REST, Object-oriented Programming (OOP), Functional Programming, Scrum, Agile Software Development

Platforms

Visual Studio Code (VS Code), Netlify, Amazon Web Services (AWS), Docker

Storage

MySQL, PostgreSQL

Other

CSS Grid, UI Development, Front-end Development, User Interface (UI), AI Tools, Full-stack, Workflow Automation, Agentic AI, Multi-agent Systems, Software Architecture, Axios, Styled-components, Gatsby, Design, Railway, Apollo, AIOps, Monorepos

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