Vedran is available for hire
Hire VedranVedran Amidzic
Verified Expert in Engineering
Software Engineer and Developer
Osijek, Croatia
Toptal member since March 16, 2017
Bio
Vedran is a senior full-stack engineer with 10+ years of experience across fintech, enterprise, and B2B SaaS, and 12,000+ hours logged on Toptal. He builds LLM-powered product features with the Claude API, AI SDK, tool calling, structured outputs, and MCP, backed by deep full-stack experience in TypeScript, React 19, Next.js, and Go. He designs AI-assisted engineering workflows (Claude Skills, project rules, AGENTS.md conventions) that shorten the path from spec to merged, production-ready code.
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...
Fabric
React, Gatsby, JavaScript, CSS, TypeScript, Front-end Development...
Experience
- React - 10 years
- TypeScript - 9 years
- Next.js - 6 years
- PostgreSQL - 6 years
- Full-stack - 6 years
- Software Architecture - 4 years
- AI Engineering - 2 years
- Claude Code - 1 year
Preferred Environment
React, PostgreSQL, TypeScript, Next.js, MySQL, GraphQL, Claude Code, Artificial Intelligence (AI), Claude API, JavaScript
The most amazing...
...achievement was contributing 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
- 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.
- 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.
- Owned the tickets feature that replaced legacy payment rules with ticket-based segmentation across the organizer UI, registration, and networking flows.
- Built MCP Servers that connected external tools to Claude Code.
- Created custom Skill.md files and project rules, and contributed to Docker Sandbox using the SBX tool for building isolated environments.
- Improved security and performance needed for ISO standards.
Technologies: TypeScript, React, GraphQL, Apollo, Go, OpenCode, Claude Code, AI SDK, AIOps, Monorepos, AI Tools, Full-stack, Workflow Automation, Claude, Agentic AI, Multi-agent Systems, Full-stack Development, Artificial Intelligence (AI), Stripe, API Integration, Payment APIs, AI Agents, Software Architecture, GraphQL API, REST APIs, Content Management Systems (CMS), CMS, Web Development, Agentic Coding, Jest, React Testing Library, React Native, Tailwind CSS, Application State Management, Responsive UI, User Experience (UX), Zustand, Playwright, SQL, Web Application Architecture, AI Integration, Large Language Models (LLMs), CI/CD Pipelines, CRUD, Highcharts, Strapi, HTML5, Scrum, Node.js, Prisma, Agile Software Development, Styled-components, Docker, JSON, Responsive Layout, APIs, Responsive Web Design (RWD), Google Maps API, Zod, Zod Schema, UX Design, UI Design, PNPM, Ruby on Rails 8, Google Cloud, Front-end, AI Chatbots, AI-assisted Development, Clean Code, SaaS, AI Engineering, AI Architecture, Fastify, OpenAI SDK, Security, Resend, Technical Leadership, WebSockets, Fintech, GDPR, Continuous Integration (CI), Data Privacy, Software as a Service (SaaS), Ruby on Rails (RoR), Turborepo, Turbo, Sentry, Datadog, Architecture, Document Parsing, CSV, AI Automation, Web Applications, Data Processing, Back-end Development, Product Management, Agentic Frameworks, Claude Agent SDK, ChatGPT, Product Owner, Dashboards, Data Visualization, Google Cloud Platform (GCP), React Router, React Redux, OpenAI, Codex, Payment Gateways, Leadership, Role-based Access Control (RBAC), AI Agent Orchestration, Plugins, Vertex AI, Model Context Protocol (MCP), Distributed Systems, Third-party APIs, API Development, Continuous Delivery (CD), GitHub Actions, Kubernetes, NGINX, Helm, Cloudflare, Redis, Workflow Automation & System Integration
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.
- Built Skill.md files and configured project AGENTS.md and CLAUDE.md to have better Agentic development workflows.
- Built an admin impersonation feature with scoped access controls and audit logging, cutting support resolution time for user-reported issues.
- Implemented WorkOS-backed authentication, securing sign-in and session management across the application.
- Created various workflows for OpenCode and tested non-frontier lab models, and how they fit the project.
Technologies: Shadcn, React, Node.js, JavaScript, Claude Code, AI SDK, Next.js, Railway, PostgreSQL, Software Architecture, Agentic AI, API Integration, Payment APIs, AI Agents, Full-stack, TypeScript, REST APIs, Content Management Systems (CMS), CMS, Web Development, Agentic Coding, Jest, React Testing Library, Tailwind CSS, Application State Management, Responsive UI, User Experience (UX), Playwright, SQL, Web Application Architecture, AI Integration, CRUD, Supabase, Highcharts, HTML5, Scrum, MySQL, REST, Agile Software Development, Styled-components, Docker, Monorepos, JSON, Responsive Layout, APIs, Responsive Web Design (RWD), Zod, Zod Schema, Vercel, UX Design, UI Design, PNPM, Front-end, AI Chatbots, Chatbots, Data Engineering, AI-assisted Development, Clean Code, SaaS, AI Engineering, AI Architecture, OpenAI SDK, Security, Python, Technical Leadership, WebSockets, Continuous Integration (CI), Data Privacy, Software as a Service (SaaS), Turborepo, Turbo, Sentry, Architecture, Document Parsing, CSV, AI Automation, Web Applications, Data Processing, Gmail, Back-end Development, Product Management, Agentic Frameworks, Claude Agent SDK, ChatGPT, Dashboards, Data Visualization, LangChain, React Router, React Redux, OpenAI, Codex, Payment Gateways, AI Agent Orchestration, Plugins, Model Context Protocol (MCP), Third-party APIs, API Development, Continuous Delivery (CD), GitHub Actions, Cloudflare, Redis, Workflow Automation & System Integration
Senior Software Engineer
2021 - 2025
Fabric
- Built a reusable React, TypeScript, and MUI component library, standardizing forms, tables, and modals across the marketing site and quoting flows.
- 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.
- Used modern AI tools like Copilot and various other competition extensions inside my IDE for faster development.
Technologies: React, Gatsby, JavaScript, CSS, TypeScript, Front-end Development, User Interface (UI), Design, Shadcn, API Integration, Full-stack, Software Architecture, GraphQL API, REST APIs, Content Management Systems (CMS), CMS, Web Development, Insurance, Jest, React Testing Library, GraphQL, Tailwind CSS, Application State Management, Responsive UI, User Experience (UX), Redux, SQL, Web Application Architecture, CI/CD Pipelines, CRUD, Highcharts, Strapi, HTML5, Scrum, MySQL, REST, Node.js, Agile Software Development, Styled-components, Docker, Monorepos, JSON, Responsive Layout, APIs, Responsive Web Design (RWD), Google Maps API, UX Design, UI Design, Front-end, AI-assisted Development, Clean Code, SaaS, Technical Leadership, WebSockets, Fintech, Continuous Integration (CI), Software as a Service (SaaS), Turbo, CSV, Web Applications, Data Processing, Express.js, Product Management, ChatGPT, Dashboards, Data Visualization, Legal, React Router, React Redux, Payment Gateways, Plugins, Third-party APIs, API Development, Continuous Delivery (CD), GitHub Actions, Cloudflare, Redis
Senior Front-end Engineer
2020 - 2021
Valour Structured Products, Inc
- Developed an app dashboard that tracks cryptocurrency prices and connects to an external API.
- Created a theme and a complete website based on React and Gatsby.
- Built a CI/CD pipeline for automatic deploys of the project to Netlify.
Technologies: HTML, JavaScript, Node.js, JSON, Sketch, CSS, Responsive Layout, Responsive UI, APIs, Responsive Web Design (RWD), API Integration, Content Management Systems (CMS), HTML5, MySQL, REST, TypeScript, Styled-components, Apollo, Google Maps API, UX Design, UI Design, Front-end, Clean Code, SaaS, Security, Continuous Integration (CI), Software as a Service (SaaS), CSV, Web Applications, Dashboards, Data Visualization, Product Owner, React Router, Plugins, Third-party APIs, API Development, Web Scraping
Senior Front-end Engineer
2020 - 2021
T Philippa Huckle Group
- 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 testers, PO, and UI designers.
Technologies: GraphQL, CSS, HTML, Tailwind CSS, React, Full-stack, TypeScript, Software Architecture, REST APIs, Content Management Systems (CMS), CMS, Web Development, Responsive UI, User Experience (UX), SQL, CI/CD Pipelines, CRUD, HTML5, Scrum, MySQL, REST, API Integration, Node.js, Styled-components, JSON, Responsive Layout, APIs, Responsive Web Design (RWD), UX Design, UI Design, Front-end, SaaS, Web Applications, Dashboards, React Router, Plugins, Third-party APIs, API Development, Redis
Senior Front-end Engineer
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: HTML, JavaScript, React, TypeScript, REST APIs, Web Development, HTML5, MySQL, REST, API Integration, Node.js, JSON, Responsive Layout, APIs, Responsive Web Design (RWD), UX Design, UI Design, Front-end, Software as a Service (SaaS), Web Applications, Dashboards, React Router, Third-party APIs, API Development
Front-end Engineer
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, TypeScript, Web Development, HTML5, Scrum, MySQL, REST, API Integration, Monorepos, JSON, Responsive Layout, APIs, Responsive Web Design (RWD), UX Design, UI Design, Front-end, SaaS, Software as a Service (SaaS), CSV, Web Applications, Dashboards, React Router, Third-party APIs, API Development, Redis
Front-end Engineer
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.
- Built a custom theme for a SaaS base IT infrastructure website.
Technologies: JavaScript, SCSS, CSS, HTML, TypeScript, Web Development, HTML5, Scrum, MySQL, REST, JSON, jQuery, Responsive Layout, APIs, Responsive Web Design (RWD), UX Design, UI Design, Front-end, Progressive Web Applications (PWAs), Azure, Web Applications, Dashboards, React Router, Redis
Front-end Engineer
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 front-end technologies like CSS Grid, Flexbox, etc.
- Integrated static HTML and CSS code into Angular templates.
- Contributed to the presentation of client-side sites. Created various dashboard elements.
Technologies: JavaScript, SCSS, CSS, HTML, Web Development, HTML5, Scrum, MySQL, REST, TypeScript, JSON, jQuery, Responsive Layout, APIs, Responsive Web Design (RWD), UX Design, UI Design, Front-end, SaaS, Web Applications, Angular, Dashboards
Front-end Engineer
2019 - 2019
Web Shop Agency (via MVP Factory)
- Worked with a large team to develop a UI for the client and the dashboard sites of a large German B2B/B2C store.
- Improved a current codebase, which was in very bad shape, and recommended to teammates to start using front-end build tools.
- Enhanced the overall responsive look and theme maintainability.
Technologies: JavaScript, SCSS, CSS, HTML, Web Development, HTML5, Scrum, MySQL, REST, jQuery, Responsive Layout, Responsive Web Design (RWD), UI Design, Front-end, Web Applications, Dashboards
Front-end Engineer
2018 - 2019
Insync Insurance Solutions, Ltd. (via Toptal)
- Developed the UI for both the front-end and agent sites.
- Connected InSync insurance websites with REST API for viewing, selling, and updating insurance policies.
- Created an admin panel for displaying user data and insurance documents.
Technologies: React, JavaScript, Web Development, HTML5, Scrum, MySQL, REST, jQuery, Responsive Layout, Responsive Web Design (RWD), Front-end, SaaS, Web Applications, Dashboards
Front-end and UI/UX Web Developer
2017 - 2018
Yellow Letters, Inc. (via Toptal)
- Created various custom UI elements like tables, charts, and overall typography elements.
- Developed both client-side and internal dashboard pages.
- Fixed various bugs in a collaboration with a back-end engineer.
Technologies: JavaScript, CSS, HTML, Web Development, HTML5, Scrum, REST, jQuery, Responsive Layout, Responsive Web Design (RWD), Front-end, SaaS, Web Applications, Dashboards
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, CSS, HTML, Web Development, HTML5, Scrum, jQuery, Responsive Layout, Responsive Web Design (RWD), Front-end, Web Applications, Dashboards
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, CSS, HTML, Web Development, HTML5, Scrum, jQuery, Responsive Layout, Responsive Web Design (RWD), Front-end, Web Applications, Dashboards
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, Web Development, HTML5, Scrum, jQuery, Responsive Layout, Responsive Web Design (RWD), Front-end, Web Applications
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, Web Development, HTML5, Scrum, jQuery, Responsive Layout, Responsive Web Design (RWD), Front-end, Web Applications
Experience
b2match
https://b2match.com/I worked across the full product stack with other team members. As a senior software engineer for this B2B SaaS product, I contributed to multiple repositories and services and built these features:
• Event management admin dashboard.
• Tools organizers use to configure events, manage participants, and control meeting rules.
• Participant experience dashboard: the attendee-facing app for profiles, matchmaking, and scheduling B2B meetings.
• Payments and ticketing: ticket types, purchase flows, and access rules tied to event participation.
• Company website: the public marketing site built on Strapi CMS, giving the marketing team self-serve content management.
• Event management admin dashboard.
• Tools organizers use to configure events, manage participants, and control meeting rules.
• Participant experience dashboard: the attendee-facing app for profiles, matchmaking, and scheduling B2B meetings.
• Payments and ticketing: ticket types, purchase flows, and access rules tied to event participation.
• Company website: the public marketing site built on Strapi CMS, giving the marketing team self-serve content management.
Surface AI-native People Team
https://surface.ai/Surface (by Paradigm) is an enterprise SaaS platform that pulls data from a company's HR stack (HRIS, performance, surveys, recruiting, learning) into a single intelligence layer. It surfaces attrition and engagement patterns, benchmarks them against peer companies, and lets an agent produce the actual output: reports, policy drafts, rollout playbooks, board readouts, and custom analytics. Built around expert frameworks from Paradigm's consulting practice, with SOC 2 Type II, SSO, and role-based access on the enterprise side. Worked as part of the product team building it end-to-end, from authentication and the core dashboard through to the analytics.
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.
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.
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, GraphQL API, REST APIs, React Testing Library, Playwright, Highcharts, Claude API, Zod, Zod Schema, React Router, React Redux, API Development, Google Maps API, OpenAI API, Stripe, jQuery, Stripe API, Chart.js
Tools
Prisma, Shadcn, Claude Code, OpenCode, Claude, Turbo, Claude Agent SDK, ChatGPT, Codex, Webpack, AI SDK, Sentry, Sketch, Shadcn UI, NGINX, Helm
Languages
SCSS, HTML, HTML5, GraphQL, CSS, JavaScript, TypeScript, SQL, Python, Go
Frameworks
Tailwind CSS, Next.js, Jest, Redux, Agentic Frameworks, React Native, Fastify, Ruby on Rails (RoR), Angular, Express.js
Paradigms
REST, Web Application Architecture, CRUD, Responsive Layout, Responsive Web Design (RWD), Clean Code, Continuous Integration (CI), Model Context Protocol (MCP), Continuous Delivery (CD), Scrum, Agile Software Development, UX Design, UI Design, Role-based Access Control (RBAC), B2B
Industry Expertise
Insurance
Storage
JSON, MySQL, PostgreSQL, Google Cloud, Datadog, Redis
Platforms
Amazon Web Services (AWS), Docker, Vercel, Google Cloud Platform (GCP), Vertex AI, Netlify, Azure, Kubernetes
Other
Axios, Styled-components, Gatsby, Front-end Development, User Interface (UI), Apollo, Monorepos, AI Tools, Full-stack, Workflow Automation, Agentic AI, Multi-agent Systems, Full-stack Development, Artificial Intelligence (AI), API Integration, AI Agents, Content Management Systems (CMS), CMS, Web Development, Agentic Coding, Application State Management, Responsive UI, User Experience (UX), CI/CD Pipelines, APIs, Strapi, AI Engineering, PNPM, Front-end, AI-assisted Development, SaaS, AI Architecture, OpenAI SDK, Technical Leadership, WebSockets, Fintech, Software as a Service (SaaS), Turborepo, Architecture, Document Parsing, CSV, AI Automation, Web Applications, Data Processing, Product Management, Product Owner, Dashboards, Data Visualization, OpenAI, Payment Gateways, Leadership, Plugins, Third-party APIs, GitHub Actions, Web Scraping, Workflow Automation & System Integration, Software Architecture, Payment APIs, Zustand, AI Integration, Large Language Models (LLMs), Supabase, AI Chatbots, GDPR, Data Privacy, Back-end Development, Legal, AI Agent Orchestration, Design, Railway, AIOps, Ruby on Rails 8, Chatbots, Data Engineering, Security, Resend, Payments, Progressive Web Applications (PWAs), RAG Pipelines, Charting, WorkOS, Authentication, Authorization, Gmail, LangChain, AI-generated Video, Distributed Systems, Cloudflare
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