Zsolt Rácz, Developer in Budapest, Hungary
Zsolt is available for hire
Hire Zsolt

Zsolt Rácz

Verified Expert  in Engineering

Bio

Zsolt has over 10 years of experience in full-stack development, mainly with Angular, Node.js, and Symfony. With his deep engineering knowledge, leadership experience, and holistic approach, he provides extraordinary value and understands what it takes to build stable, robust tools for extremely high-traffic use (e.g., 18 million monthly users for a video-on-demand service). Recognized as a team player, Zsolt considers himself a quick learner motivated by challenges.

Portfolio

Proximus
GraphQL, Jenkins, Electron, Jasmine, Node.js, Angular, HTML5, jQuery...
iflix
Amazon Web Services (AWS), Kubernetes, Redis, Docker, PostgreSQL, NestJS...
Kendaxa Development
Magento, Docker Compose, Symfony, PHP

Experience

JavaScript - 6 yearsSQL - 6 yearsPHP - 6 yearsSymfony - 5 yearsAngular - 3 yearsNode.js - 3 yearsREST APIs - 3 yearsTypeScript - 3 years

Availability

Part-time

Preferred Environment

REST APIs, JavaScript, Angular, Symfony, TypeScript, Node.js

The most amazing...

...project I've worked on was iflix (iflix.com), a video streaming platform with more than 18 million active users.

Work Experience

Senior Engineer

2020 - PRESENT
Proximus
  • Contributed to the development of a desktop application for the customer support of Belgium's largest telco. Worked in an agile team, delivering new features and bug fixes.
  • Created a responsive front end from scratch based on UI mockups. The application is used by the customer service department to support millions of clients.
  • Set up and maintained development pipelines in GitLab to improve the team's efficiency.
  • Conducted over 10 technical interviews and developed the screening process and technical exercises.
Technologies: GraphQL, Jenkins, Electron, Jasmine, Node.js, Angular, HTML5, jQuery, Agile Software Development, Scrum, TypeScript, SCSS, Technical Hiring

Software Engineer

2018 - 2019
iflix
  • Participated in the development of a video-on-demand service with more than 18 million monthly active users.
  • Collaborated with an agile team on subscription and payment management while cooperating with engineering teams distributed worldwide as a software engineer on the project.
  • Designed and implemented an order queuing system to support high load scenarios exceeding 80 transactions per second.
  • Implemented new microservices for integration with external partner APIs.
Technologies: Amazon Web Services (AWS), Kubernetes, Redis, Docker, PostgreSQL, NestJS, TypeScript, Node.js

Software Developer

2018 - 2019
Kendaxa Development
  • Led the API development of a shift planning tool used by a German telecommunications product distributor with 700 employees.
  • Collaborated with the product owner and suggested improvements for the long-term vision, leading to a 30% reduction of development time and a 50% reduced server load.
  • Suggested and implemented improvements in the security, performance, and architecture of the application.
  • Participated in the development of smaller eCommerce projects.
Technologies: Magento, Docker Compose, Symfony, PHP

Web Developer

2016 - 2017
Ticketware SE
  • Participated in information system analysis, design, and development based on PHP, Symfony 2, Doctrine, and Angular 2.
  • Created a mobile application for ticket scanning through a bar code reader or camera. The application was developed using NativeScript and Angular 2 and supports Android and iOS.
  • Developed a comprehensive comparison of cross-platform mobile technologies based on the selected core technology for the project.
  • Built software for content distribution and playback on display panels in cinemas.
Technologies: Symfony, PHP, Angular, NativeScript, TypeScript, JavaScript, Node.js

Web Developer

2014 - 2016
Maxi Mark
  • Architected and implemented a fitness center management system that generated a turnover of €1.5 million in the first year.
  • Created over ten dynamic and responsive websites, all of which were custom-tailored by a graphic design expert.
  • Set up the internal company server and introduced the use of version control.
Technologies: Bootstrap, jQuery, JavaScript, PHP, Symfony

Web Developer

2011 - 2013
eN Net
  • Constructed, using PHP, MySQL, and JavaScript, five websites for various businesses.
  • Managed the administration of Linux-based web servers running 30 websites.
  • Set up and maintained a gaming portal and game servers for hundreds of players.
  • Implemented network monitoring and an alerting system using Nagios.
Technologies: Nagios, Apache2, Debian Linux, JavaScript, MySQL, PHP

Website and E-shop for TAM Autohof

https://autohof.sk/en
TAM Autohof is a network of petrol stations in the Czech Republic and Slovakia.

I was in charge of the solution design and implementation of their website. Eventually, an e-shop was added to the website. It was integrated with the company's customer reward system and handled orders from thousands of registered members.

The site is built on PHP and Symfony; WordPress handles the CMS functionality and administration interface.

OnlineFit: Fitness Center Management Application

https://www.onlinefit.sk/en
OnlineFit is a comprehensive, multilingual web application that helps fitness center owners manage their businesses. Fitness owners can generate their websites and let their customers easily sign up for training through a calendar.

As the full-stack engineer, I designed the entire architecture of the solution and provided operations and support for over a year.

Main features of the system:
Booking management for group training, online payments, invoicing, stock management, website creator, support for multiple clients in different locations, and built-in business analytics tools.

Emplaya: Workforce Management Tool

Emplaya is a tool for managing the workforce of mid-to-large size companies. Its main features include shift, vacation, and sick leave planning. It consists of a desktop and a mobile application. I participated as the lead developer of the microservice-based API providing a back end for the desktop and mobile application. My roles included providing maintenance, implementing new features to the back end, documenting processes, and internal API documentation.
2015 - 2017

Master's Degree in Informatics

Technical University of Košice - Košice, Slovakia

2012 - 2015

Bachelor's Degree in Informatics

Technical University of Košice - Košice, Slovakia

Libraries/APIs

Node.js, HTTP API, REST APIs, Google Maps API, Doctrine 2, jQuery

Tools

Git, NGINX, Jira, Confluence, Nagios, Jenkins, Amazon Simple Queue Service (SQS), Docker Compose

Languages

HTML, HTML5, PHP, JavaScript, CSS, SQL, TypeScript, C++, C, GraphQL, Java, SCSS

Frameworks

PHP MVC, Express.js, Symfony, Angular, NativeScript, Ionic, NestJS, Bootstrap, Laravel, Qt, Jasmine, Electron, CodeIgniter

Paradigms

RESTful Development, Agile Software Development, Metaprogramming, Scrum

Platforms

Docker, Linux, Debian Linux, Apache2, Magento, Kubernetes, Amazon Web Services (AWS), WordPress

Storage

PostgreSQL 10, MySQL, Redis, Amazon S3 (AWS S3), PostgreSQL

Other

API Integration, APIs, Web MVC, Third-party APIs, Web Development, User Interface (UI), Software Design, UML Diagrams, Task Management, Networks, WebSockets, Software Engineering, Engineering, Technical Hiring

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

1

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring