Daniel – iOS, Swift, SwiftUI

An AI language companion that helps users learn French, Spanish, or Italian in a modern way.

• Developed the first working and feature-rich version from scratch, ready for AppStore release in a matter of months;
• Implemented a real chat with voice/text modes using Gladia, ElevenLabs, OpenAI, etc.;
• Wrote tests to maintain the stability of the app.

It is a cutting-edge fitness/crypto technology company dedicated to encouraging physical activity and promoting healthier lifestyles through its unique mobile apps.

One of the products is a web2 app that rewards you for physical activity with internal currency "sweatcoins", while another is a web3 app that allows you to convert your steps into crypto. Both are live production apps at a huge scale with millions of daily active users.

• Participated in the complete development cycle, from pitching ideas to their final implementation;
• Implemented my own ideas from A to Z, which led to significant improvements in metrics;
• Optimized architecture and performance;
• Conducted learning sessions;
• Introduced new best practices and adjusted existing ones;
• Mentored newcomers with native backgrounds without experience in ReactNative;
• Integrated pair programming on a regular basis with fantastic outcomes;
• Conducted code reviews;
• Did code refactoring;
• Stayed updated with the latest trends in ReactNative world (conferences, articles, etc).

It is a company developing an iOS app that helps people build their emotional intelligence and solve real-life problems.

• Increased install-to-trial CVR by 13%;
• Increased 7-day retention by 20+%;
• Increased app revenue by 7%;
• Integrated the TDD approach into developers' day-to-day life;
• Participated in the complete development cycle, from pitching ideas to their final implementation;
• Covered a significant amount of code with unit/integration/snapshot tests;
• Set up CI/CD;
• Conducted code reviews;
• Did code refactoring.

It is a company that solves enterprises’ most complex software engineering challenges.

• Architected and developed iOS Azure Maps SDK from scratch for Microsoft;
• Communicated with a team on Microsoft's end;
• Prepared the SDK for public release much before the deadline;
• Wrote unit tests for the SDK;
• Developed a feature-rich iOS app from scratch for an NDA company;
• Conducted code reviews;
• Did code refactoring.

It is a company that develops its own network marketing products while outsourcing projects to a Fortune 500 company.

• Developed/architected/managed a feature-rich large iOS app for network marketers from scratch;
• Participated in the complete development cycle, from pitching ideas for the app roadmap to releasing implemented features on the AppStore;
• Optimized fetching a massive database of 20,000 contacts on the first app launch, so it started taking about 30 seconds instead of 10+ minutes;
• Used the TDD approach;
• Set up CI/CD;
• Wrote unit, integration, and e2e tests;
• Developed a web application for SonyMusic that is a one-stop place for marketers to create, share, and track the success of advertising campaigns, released tracks/albums, etc.;
• Conducted code reviews;
• Did code refactoring.

It is a company developing a crypto wallet as an iOS app that helps people to store/exchange/send coins.

• Led the project helping both the entire mobile team (iOS and Android) and the backend team;
• Developed the whole iOS app from scratch;
• Implemented signing of transactions for 7 different coins;
• Consulted the team on architectural, UI/UX, and business issues;
• Integrated Trust Wallet iOS SDK;
• Cooperated with developers of the SDK;
• Wrote unit tests;
• Conducted code reviews;
• Did code refactoring.