Stoyan Stoyanov
Senior Product Designer (UX UI) - Freelancer at Toptal
Sofia-City, Bulgaria
Summary
🤩
Rockstar🎓
Top SchoolStoyan Stoyanov is a Senior Product Designer and freelancer with 13 years of experience shaping user-centered digital products across fintech, web3, mobile and enterprise platforms. He blends hands-on UX research, voice UI design and product strategy to guide startups and established businesses from discovery to scalable implementation, having led design for web3 tooling like Interflow and created drag-and-drop dashboard builders and smart wallet integrations. Comfortable working directly with CEOs, engineers and investors, he also drives process improvements and design systems as a Chief Design Officer and senior consultant. Beyond visual interfaces he contributes to robust developer tooling—improving reliability in open-source projects such as rust-headless-chrome and Hubot—bringing a rare mix of design sensitivity and backend-minded engineering rigor. Based in Sofia, Stoyan is known for turning behavioral insights into practical MVPs and for crafting voice and conversational experiences that anticipate new interaction patterns.
13 years of coding experience
6 years of employment as a software developer
UX/UI & Psychology of interaction design , UX/UI & Psychology of interaction design at IxDF - The Interaction Design FoundationBachelor's degree Computer Science, Bachelor's degree Computer Science at New Bulgarian UniversityWeb Design, Web Design at Treehouse
english c1
Github Skills (13)
bots10
error-handling10
hubot10
javascript10
rust10
coffeescript10
chromeless10
headless-browser10
web-automation10
testing10
async9
asynchronous9
regular-expression9
Programming languages (10)
Github contributions (5)
rust-headless-chrome/rust-headless-chrome
Jun 2019 - Jun 2021
A high-level API to control headless Chrome or Chromium over the DevTools Protocol. It is the Rust equivalent of Puppeteer, a Node library maintained by the Chrome DevTools team.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:12 commits, 4 PRs, 17 comments in 2 years
Contributions summary:Stoyan primarily contributed to the core functionality of `rust-headless-chrome`, enhancing its stability and feature set. Their work included adding crucial features like implicit scrolling for elements, along with implementing a strict error handling mechanism using `#strict_until` to enhance the reliability of wait-until functions. The user also addressed critical issues by extracting remote error handling and ensuring better handling of edge cases, contributing to robustness of the library. The contributions were centered around improving the robustness and reliability of the headless chrome interface.
node-librarychromiumheadlesshigh-levelnodejs
hubotio/hubot
Apr 2015 - Aug 2015
A customizable life embetterment robot.
Role in this project:Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:9 commits, 8 PRs, 33 comments in 3 months
Contributions summary:Stoyan primarily focused on improving the robustness and maintainability of the Hubot framework. Their contributions include fixing a regular expression bug related to robot aliases, enhancing test coverage by implementing unit tests for the `respond` function, and passing the alias in the Robot constructor. Additionally, the user addressed documentation errors, correcting typos to improve clarity and accuracy within the codebase. These changes point to a focus on improving the core functionality and testability of the project.
roboticsbotchatrobotcustomizable
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