Denis
From Ukraine (GMT+3)
7 years of commercial experience
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Denis – React Native, React, Node.js
Having mastered his React and React Native proficiency while working on business projects, Denys is definitely the developer you don’t want to overlook. The notes of our technical interviewer clearly demonstrate that Denys is a fast learner; he dives deep into the problem and tries his best to resolve it straight away. Moreover, he can work under pressure and still deliver fantastic results. On top of that, Denys was involved in various startups, so he is fully cognizant of process flows, and he passionately wants to be part of the team exploring new business heights.
Main technologies
Additional skills
Ready to start
ASAPDirect hire
Potentially possibleExperience Highlights
Senior mobile developer
The app offers dozens of Hebrew meditations that can help users deal with anxieties and tensions, sleep better, and be focused. Those who have never practiced meditation can easily learn how to do so and relax.
- improved app stability and performance
- reduced bundle size and initial load time
- redesigned and improved the existing front-end
- added several new screens and refactored the old codebase
- added caching mechanisms for images and endpoints
Front-end / Mobile Developer
The UK’s fastest-growing ticket and booking platform, and it is proven to increase attendance, spending per head, and exposure for anyone in the nightlife industry.
- fixed bugs and issues in the old mobile app;
- refactored legacy front-end part;
- wrote a bunch of unit tests;
- added new components to the storybook;
- helped to divide whole app into smaller packages;
Mobile Developer
A mobile app that enables mindfulness teachers to record audio meditations and earn with a direct-to-client subscription.
- built all UI/UX parts;
- added firebase;
- debugged and resolved the application issues;
- published and updated the app in stores.
Software Engineer
The 24/7 remote helpdesk that's here to help businesses achieve operational excellence every day.
- built an app from scratch;
- added deep links;
- wrote unit tests;
- added and configured firestore/cloud functions;
- published and updated the app in stores with expo;
Full-stack developer
A mobile application where users can earn crypto.
The features Denys worked on were:
- watching videos for famous brands and earning even more XP;
- tracking progress on Leaderboard;
- the option of expanse being earned with XP;
- earning rewards faster with the boost timer.
- created both front-end and back-end parts;
- created and configurated database and server;
- published and updated a mobile app;
- added web3 to communicate with blockchain data.