Untitled-Projects

Projects

Check my portfolio. I work as a freelance developer for companies all over the world to build web applications, marketing websites, data visualizations, and browser extensions. I use React, Next.js, Node.js and related technologies to implement seamless and performant products.

React Project | Developer Portfolio Item
Apple ***

Web portal in React.js, which allows Apple ***

DEVELOPMENT TOOLS
  • React
  • Framer Motion
software architect | portfolio item
GoSchoolBox

GoSchoolBox is a SaaS platform that serves as the technical infrastructure layer between school districts and tutoring companies. The number of users grew from 50k to 1mil. The GoSchoolBox platform has suffered from a significant number of application stability issues such as spontaneous error messages, gateway timeout errors, slow page load times and slow user flows. My role as a software architect was to ensure platform stability, resiliency, and scalability. I helped the team to integrate and set up APM with metrics and performance dashboards to detect and diagnose end-users’ experience with mission-critical services. I refactored and fixed critical user flows to improve user flow performance, server throughput and page load performance. I optimised Mongo search performance to allow users search millions of records within seconds.

DEVELOPMENT TOOLS
  • AWS
  • Node.js
  • MongoDB
View project →
Website builder platform in React | Portfolio Item
Stackbit

Stackbit is a website builder that helps developers of any level to build their own Jamstack sites based on Next.js and Tailwind, fast. I helped Stackbit’s team to set up the tooling and design the architecture for design system of the main platform. I helped and mentored senior React developers best practices and what patterns to use to solve complex flows in React projects. I was working on fixing various issues and bugs and implemented new features for enterprise clients.

DEVELOPMENT TOOLS
  • React
  • Node.js
  • MongoDB
View project →
Frontend Technology Lead | Portfolio Item
Meridian

Meridian provides next-gen, AI-powered workflow tools to private investors. As a Frontend Technical Lead, my responsibility was not just to manage but also to inspire and guide the front-end team through the intricacies of front-end development. One of my significant contributions was collaborating closely with the Product Designer. Together, we crafted a UI design system that was not just visually appealing but also intuitive and user-centric. This system became the cornerstone of the user experience, embodying the essence of Meridian’s innovative approach. I built the MVP from scratch and set up CI pipeline for Meridian’s UI.

DEVELOPMENT TOOLS
  • React
  • Storybook
  • Typescript
View project →
fractional cto | portfolio item
Provenance

As a fractional CTO I helped the team with strategic consulting on the product development roadmap. I managed and led team of developers. I made code reviews to identify issues before they translate into technical debt. I helped developers with best practices and leveraging dev tooling to speed up the development process and ensure code quality. I architected and built project’s infrastructure, CI pipeline and third-party integrations.

DEVELOPMENT TOOLS
  • AWS EC2
  • Node.js
  • React.js
View project →
Cryptocurrency Exchange | Developer Portfolio Item
Cryptocurrency Exchange Platform

Cryptocurrency exchange platform developed in React. I implemented user interface of portfolio management and payment systems.

DEVELOPMENT TOOLS
  • React
  • Typescript
View project →
Investment community platform | Developer Portfolio Item
Investment Community Platform

Investment community platform for investors to discover deals and identify co-investors. The platform allows investors to interact with each other, keep track of deals and creating a virtual investment club for a curated group of private investors. I designed and implemented integration with third-party services Docusign, Slack and Stripe. I helped the team to set up the project tooling, fix various issues and implement new features.

DEVELOPMENT TOOLS
  • React
  • Node.js
  • MongoDB
View project →
Computational Tool | Developer Portfolio Item
System Master PLanner

A computational tool for master planners, energy/resource managers, and policy makers. It allows users to evaluate sustainability and resiliency scenarios for large portfolios of buildings and other assets.

DEVELOPMENT TOOLS
  • React
  • Leaflet
React CMS Project | Developer Portfolio Item
Ctrl

Ctrl is a customer data platform for customer success professionals. Ctrl empowers post-sales people to bring data together from different apps to create their own workspaces. I worked as a front-end developer to develop new features, fix existing code base. I also helped and mentored senior React developers best practices.

DEVELOPMENT TOOLS
  • Chrome Extension
  • React
  • Storybook
  • Typescript
View project →
Corporate Website | Portfolio Item
Nash

Marketing website built with React & Gatsby. All pages are fully responsive and optimised for mobile viewing.

DEVELOPMENT TOOLS
  • React
  • Gatsby
  • Typescript
View project →
Marketing website nextjs | Portfolio Item
Ship***

A Corporate marketing website in Next.js. All pages are fully responsive and SEO optimised. I designed website’s CMS in Contentful and GraphQL is used for fetching and transforming data.

DEVELOPMENT TOOLS
  • Next.js
  • Contentful
  • GraphQL
  • Mapbox
NFT project | Portfolio Item
Archipelago

Archipelago is a “next-generation” NFT marketplace that offers curated generative art NFTs. As a front-end consultant I helped the team to review the existing code base, refactor problematic flows, fix various bugs and issues.

DEVELOPMENT TOOLS
  • Next.js
  • Ethers.js
  • Typescript
  • Tailwind
View project →
Security Tokens Offering Platform | Developer Portfolio Item
Security Tokens Offering Platform

A secure, customer-centric, decentralized online securities exchange marketplace that allows investors at all levels to buy and sell digital securities. The customer is leading cryptocurrency exchange. I worked as a Senior Front-End Engineer. I operated as an architect for front-end implementation and made reviews, audits the code other front end developers.

DEVELOPMENT TOOLS
  • React
  • Typescript
React Widget | Developer Portfolio Item
Marketing tool

A price calculator and visualization of real estates which is used as a marketing tool. I developed this widget in React.js.

DEVELOPMENT TOOLS
  • React
Podcast Platform | Developer Portfolio Item
Saycaster

A podcast platform where podcasters can upload audio files and add ‘spots’ to specific moments in their podcasts. Podcasters can add anything from links, to social media posts, to other videos or images. Listeners are engaged with content, such as social media posts or preview of external web pages.

DEVELOPMENT TOOLS
  • Node.js
  • PostgreSQL
  • React
  • D3.js
Read more →
Defi project | Portfolio Item
SushiSwap Migrator

A defi project where users can migrate LP positions from Uniswap to SushiSwap. Users can interact with ethereum blockchain through Metamask. Users can see erc-20 tokens list and list of their LP positions, add new erc-20 tokens.

DEVELOPMENT TOOLS
  • Next.js
  • Ethers.js
  • Tailwind
View project →
Notion Api Connector

I built this Google Chrome extension that allows connecting and importing data from any API to Notion.

DEVELOPMENT TOOLS
  • Chrome Extension
  • AWS
  • React
  • Node.js
View project →
SalesforceToNotion

Chrome browser extension that integrates data between Salesforce and Notion. It allows users pulling Salesforce data directly into Notion workspace.

DEVELOPMENT TOOLS
  • Chrome Extension
  • Notion API
  • React
  • Node.js
View project →
tauchain blockchain | portfolio item
Tau

I built a Node.js back-end service for Gatsby website. It processes data from third-party APIs (third-party exchanges, Github API, Twitter API, Telegram API). The server is deployed on AWS.

DEVELOPMENT TOOLS
  • Node.js
  • AWS
Wordpress Website | Developer Portfolio Item
Andrej Gajdos

My website & freelance software development blog. Built with WordPress & JavaScript.

DEVELOPMENT TOOLS
  • WordPress
  • JavaScript
Marketing WordPress Website | Developer Portfolio Item
Marketing WordPress Website

WordPress website for online marketing specialist Ivana Neckarova. Built with WordPress & JavaScript.

DEVELOPMENT TOOLS
  • WordPress
  • JavaScript
View project →
React Prototype | Developer Portfolio Item
FastSwims

Event management platform for managing swimming teams and swimming competitions. I designed a new user interface based on customer’s prototypes and built a functional prototype.

DEVELOPMENT TOOLS
  • JavaScript
  • React
  • Redux
View project →
Data Management | Developer Portfolio Item
Data Management Platform

I was working on Data Quality Management product as a visualization developer. User interface was developed in Javascript and visualisations were developed in Highcharts.

DEVELOPMENT TOOLS
  • Javascript
  • Highcharts
View project →
ecommerce tool in React | portfolio item
Potentials

I build the user interface for this e-commerce tool in React. It helps the CEO to maintain and process details about potential customers. I built the user interface using React.js and Tailwind.

DEVELOPMENT TOOLS
  • React
  • Tailwind
ecommerce store in next.js | portfolio item
Filipi

Filipi is furniture e-commerce store built with Next.js, Node.js and MySQL. I helped the owner to migrate the whole solution to another server and fix varius issues and bugs in SEO, managing data and set up analytics tools.

DEVELOPMENT TOOLS
  • Next.js
  • Node.js
  • MySQL
graph visualization in React -- portfolio item
Vertigo

I worked as a data visualization specialist to build an interactive visualization of a Neo4j graph database. I developed this visualization in React.js and D3.js.

DEVELOPMENT TOOLS
  • React
  • D3.js
  • Storybook