Mikolaj A
Mikolaj A
React Native Expert | Senior Developer | 9 Years
Contact
English, Polish
Contracts
Freedomly Code of Conduct
Read here
About Me

Is your React Native app slow, buggy, or stuck in someone else's messy codebase? I help startups, product companies, and agencies turn underperforming mobile apps into fast, reliable products — or build them right from scratch.


Here's the problem I see over and over: You hired a team (or a freelancer) who got the app 70% there. Now it's sluggish, the codebase is a maze, and every new feature feels like it takes twice as long as it should. Or maybe you're starting fresh and you don't want to end up in that situation in the first...

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Skills & Tools
mobile_app_development
android_development
automations
front_end_development
ios_development
+16
Interests
Artificial Intelligence
Blockchain
Cryptocurrencies
Experience
Lighthouse Growth
Tech Lead/ Senior React Native Engineer
3/2024 - Ongoing
Cross generation Smart TV application for one of the biggest Latvian tv providers Platforms: tvOS, Android TV, Tizen, webOS, HiSense, Web I am a tech and team lead overseeing a team of eight. I created a monorepo that hosts a single codebase, allowing us to share nearly 90% of our code across platforms. I also developed CI/CD pipelines to automate store releases and introduced trunk-based development to the team. Additionally, I co-created an internal spatial focus library that is nearly twice as fast as react-tv- space-navigation.
Alef Education
Senior React Native Developer
2/2023 - 12/2024
Cross platform Ed Tech mobile app I was responsible for developing a scalable mobile app that serves 1.4 million users. I assisted in leading a team of five and played a key role in establishing and tracking release processes using Swarmia. Single-handedly migrated the entire release process from CodePush to CircleCI. Ported Unity games to React Native. I have also led the porting of iPad OS. Furthermore, I developed a backend microservice for a trivia game using NestJS.
Flip Fit
Senior React Native Developer
11/2020 - 3/2023
Social shopping app Flip - TikTok meets Zalando Worked in a team that made Flip a unicorn. I was responsible for performance optimizations, developing and maintenance of native modules (SocketIO, live broadcasting, video merging, livestream analytics, livestream player, fps and memory analytics), developing new features (filters, shopping experience, live chat). Created a custom native player (2x faster than AkamaiPlayer). Created SocketIO wrapper (faster than any other package on github). Created a React Navigation shared element transition long before it became possible with Reanimated.

Education

Warsaw University of Life Sciences
Bachelor of Science in Computer Science and Econometrics, IT
Graduation 2018
Polish-Japanese Academy of Information Technology
Master of Science in Computer Science (Departament of Artificial Intelligence), IT/AI
Graduation 2021