Stefan boasts 13+ years of professional experience and a plethora of skills in diverse back-end/front-end solutions and database technologies for desktop and mobile development. He is an avid learner of new tech stacks, with a strong sense of commitment on projects. Working independently or in teams, Stefan always strives to deliver high-quality software solutions to clients.
Creating and developing innovative software solutions for clients across a broad range of industries.
Participating in scrums consisting of cross-functional teams, both software and hardware.
Ensuring that features are being delivered efficiently and on time.
Led the design and implementation of a responsive admin interface using Next.js, React, and Tailwind CSS, resulting in a significant reduction in user task completion time through improved workflows and visual clarity.
Developed and maintained end-to-end Cypress test suites and back-end test cases, reducing critical front-end and API bugs in production by over 70% and accelerating development cycles with earlier defect detection.
Collaborated on Node.js back-end development to enable secure communication with agent software on remote machines, supporting scalable deployment across many endpoints with stable real-time data sync.
Moved existing website into a completely new design using HTML/CSS and PHP with Smarty templates.
Designed new pages and page elements using Figma.
Refactored 10-year-old PHP code following clean code principles using common design patterns and OOP to achieve a new, faster, reusable, maintainable, and extendable codebase.
Ran E2E tests with Cypress.
Designed and implemented a complex payment and upgrade system for both existing and new subscriptions of the platform using PHP/CSS/HTML/JS.
Created a visually striking single-page application for a client from the farming industry.
Had a key role in UI/UX design, wireframing, and prototyping web applications with Adobe XD and Sketch.
Developed an in-house web application front end and back end with Vue.js, Bootstrap, Node.js, Mongoose/MongoDB.
Implemented integration with back-end API services (REST).
Implemented automated tests in Mocha (unit testing) and Cypress (E2E).
Implemented intranet and internet websites and data services using back-end and front-end technologies for well-known financial institutions.
Oversaw the relaunch of an existing website using data from the legacy platform, migrated it to a new CMS, implemented a new front-end and complex back-end logic using C#, ASP.NET, and MVC.
Built and deployed a large product API using OData and Microsoft Entity Framework for a client.
Implemented WordPress websites for clients from various industries.
Built a single-page web application with Vue.js, TypeScript, Hasura, GraphQL, Bootstrap 5, and dynamic SVG with JavaScript for a client from the wedding service industry.
Created a job board website with Nest.js, Node.js, TypeScript, TypeORM, Handlebars, REST.
Designed and implemented a mobile app with React Native, GraphQL, and Hasura.
Engineered a new solution using a cross-platform technology to distribute the app to other platforms like Android.
Offered front-end and back-end expertise on developments in a small-sized scrum team.
Implemented the front end (and partly the back end) of a technologically sophisticated website for a well-known amusement park.
Created an interface to receive user-specific data from Facebook to display relevant information to the user.
The Renter app was developed for the K.GROUP GmbH. Designed the screens using wireframes. The solution is a multi-platform application for publishing the app on other platforms without additional effort. Provided consultation, design, and implementation for an extensive dummy app for the iPhone platform.
Managed the relaunch of an existing website using data from the legacy platform and migrated it to a new CMS. Implemented a totally new front end with a complex back-end logic. Built a large product API provider using OData and Microsoft Entity Framework, working with a team of 5-7 people.
Improved and set up a CMS back end and implemented the website front end using C# ASP.NET Web Forms, HTML5, and CSS3. Created customizable controls and provided web handlers for PDF downloads.
Oversaw the website relaunch for a large German amusement park. Engineered the enabling connection and integration with Facebook to the site. The site was made highly customizable thanks to the various extensions implemented in the company's own CMS.
Nomads Work aims to make remote work easier for both companies and remote workers. Developed the job board platform using Nest.js, Node.js, TypeScript, TypeORM, Handlebars, REST.
Designed, built, and implemented the business website for Mediakular to showcase the professional projects undertaken by the company and certifications recognizing its efforts.
Implemented a large API service to provide data to a mobile application. Merged two large product databases by using SQL views.
Implemented the front end and back end of an intranet application for a well-known financial institution with complex CRUD and search/filter interfaces.
