A Senior iOS Developer with extensive expertise in the FinTech and Retail industries, adept at transitioning projects to Swift, meticulously refactoring legacy code, and implementing complex functionalities. Passionate about further excelling in SwiftUI and advancing leadership skills within dynamic teams.
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Ios DeveloperWildberriesSerbia -
Ios DeveloperWildberries Sep 2023 - PresentWildberries is the leading online retailer in Russia, with a dominant 47% market share and expansive operations across 8 countries. As a part of a team of 16, I ambitiously embarked on developing a new mobile banking app from the ground up, which 300 thousands of individuals use daily.Responsibilities and achievements:- As a Senior developer in the startup, I hold the pivotal role of implementing all critical features essential for the app/business's expansive growth. So far I…- Implemented the fundamental functionality of the application, namely money transfers and payments;- Integrated push notifications, which made it possible to promptly inform clients about current account transactions, as well as send promotional offers;- Implemented an analytics sending service, which allows you to track customer actions in the application and evaluate the effectiveness of the current design and business logic;- Implemented the functionality of online registration of a debit card and its subsequent operation in the application, which allows platform users to use funds in the account outside of Wildberries products;- Redesigned and implemented updates for design system components (standard/template elements used in the application). -
Ios DeveloperSberbank Jun 2018 - Sep 2023Москва, РоссияSber (formerly known as Sberbank) is Russia's largest bank, ranked 5th in Europe's top 10 by market capitalization. During my 5-year journey, I developed the functionality of the Credit Potential module Sberbank Online which accounts for over 81 million daily users across all platforms (20 million for an iOS version).Responsibilities and achievements:- Rewrote the module from Objective-C to Swift, allowing the team to hire professionals who lacked Objective-C knowledge; - Refactored and supported a Credits section on the main app screen that led to an increase of the average daily users in our product from 20 thousand to 120+ thousand;- Developed a backend-driven UI engine for a loan flow providing on-the-go content customization;After the pilot, the engine was successfully utilized by several teams in the tribe, decreasing the time spent on content updates;- Set up and supported my tribe’s build agents to achieve a better speed of CI/CD pipeline, reducing overall build time from 4h (at rush hours before release) to 1h;- Upon daily tasks, wrote and supported 1000+ unit tests in the module and piloted A/B tests for the app;- Mentored 3 junior developers who successfully passed evaluation tests and successfully worked after probations;- Served as an Onboarding Buddy for new tribe members, facilitating smooth integration and accelerating their productivity;- Participated in internal hackathons resulting in tech debt reduction (more than 470 warnings);- Conducted multiple tech job interviews
Sergei Gryzin Education Details
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Information Technology
Frequently Asked Questions about Sergei Gryzin
What company does Sergei Gryzin work for?
Sergei Gryzin works for Wildberries
What is Sergei Gryzin's role at the current company?
Sergei Gryzin's current role is iOS Developer.
What schools did Sergei Gryzin attend?
Sergei Gryzin attended Московский Государственный Технический Университет Им. Н.э. Баумана (Мгту).
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