# Daria Leonova

> iOS Developer

Location: London, England, United Kingdom
Profile: https://flows.cv/darialeonova

As a Senior iOS Developer with over 5 years of experience, I build thoughtful, performant, and user-focused mobile applications. My journey has taken me through complex architectures, tight deadlines, and some really fun challenges—like animating multi-touchable brokerage charts or integrating long-read audio players that start in milliseconds instead of minutes.

At Global Relay, I'm currently working on a framework using TCA and the latest Swift and SwiftUI APIs. Also helping to establish working processes.  

Previously at Surf, I wore two hats: Senior iOS Developer and DevRel Department Lead. On the tech side, I built apps for eCommerce, fintech, and foodtech industries, mentored interns, and sped up development by contributing to external Java frameworks. On the community side, I authored tech content, ran iOS-focused Telegram channels, and helped grow our audience and talent pool.

I thrive when combining engineering excellence with mentorship and storytelling—whether it's breaking down complex animations, coaching a junior dev, or sharing a Swift tip that makes someone’s day easier.

## Work Experience
### Software Developer @ Global Relay
Jan 2024 – Present | London Area, United Kingdom
- Developing a framework for advanced search inside user messages archive. Using the latest Swift and TCA features. 
- Supporting tests coverage > 75% 
- Implemented and Integrated new design system. 
- Improved Refinement: I involved developers in the “decomposition” process. This update resulted in a 12% increase in estimation accuracy. 
- Introduced new onboarding flow allowing new joiners to work on real tasks

### DevRel Department Lead @ Surf
Jan 2023 – Jan 2024
- Developing the company's communications with the professional community.
- Author of Tech and iOS telegram channels.  
- Increased the number of telegram subscribers from 500 to 890 in 4 months. Published 15 educational posts and 2 articles. Attracted 2 applicants to the company.

### iOS Developer @ Surf
Jan 2022 – Jan 2024
- Developing applications for iOS and iPadOS platforms. 
- Mentoring interns. I took a new employee through the entire hiring cycle: a test assignment, an interview, an internship, and a real project. 
- Working with Java code. Integrated approach of contributing into external frameworks. 
- Implemented custom notes for iPhone with translating HTML into NSAttributes and vice versa.
- Developed a complex UI application with dynamic graphs, charts, multi touchable features, animations and dynamic data.

### iOS Developer @ NDA
Jan 2022 – Jan 2022
Development of a fitness application for iPhone and iPad.
We used SnapKit for layout, AVFoundation for video player, Realm as a database and Firebase for analytics.
A small product team is working on the project, where there are four iOS developers. 
My responsibilities include the introduction of new functionality and refactoring of accumulated legacy, moving to VIPER.
A code review and documented syntax rules are required on the project.

### iOS Developer @ VK
Jan 2020 – Jan 2022 | St Petersburg, St Petersburg City, Russia
- Developing from scratch to release a social + educational application Sferum. 
- Developed an integrated architecture to combine web and native parts which allowed the release of an extended MVP version of the application in just 4 months. 
- Implemented full Documents module - downloading/uploading asynchronously, files viewer, files manager.
- Integrated new Apple API - WidgetKit for displaying lesson schedules on the home screen. Developed widget’s business logic and layout.
- Integrating Marusya AI Voice Assistant in the main VK application. 
- Implemented long-read audio playing functionality using streaming. That approach allowed a decrease in loading time from 1 min to milliseconds.
- Adapted advertisement into a long-read audio player.

### iOS Developer @ Applicatura
Jan 2020 – Jan 2020 | Moscow, Moscow City, Russia
SimpleWine mobile app supporting.
https://apps.apple.com/ru/app/simplewine-не-только-вино/id1457272603?l=en
Working with the Backend-Driven UI.
"Translation" of the client's requirements into understandable user stories. 
Implementation of coupons for Wallet, working with WebKit


## Education
### Bachelor's degree in Applied Mathematics
Bauman Moscow State Technical University

### Master's degree in Applied Mathematics
Bauman Moscow State Technical University

### Yandex School of Data Analysis


## Contact & Social
- LinkedIn: https://linkedin.com/in/daria-leonova-ios
- Website: https://hackernoon.com/u/marcushaldd

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Source: https://flows.cv/darialeonova
JSON Resume: https://flows.cv/darialeonova/resume.json
Last updated: 2026-04-05