Zoltan is available for hire

Zoltan Varadi

Verified Expert in Engineering

Software Developer

Location

Szeged, Hungary

Toptal Member Since

October 29, 2015

As a user experience enthusiast, 佐尔坦作为一名工程师最大的优点是他精确的设计实现. 他积极的态度和开放的心态使他能够将最优质的项目带到生活中. Zoltan在维护客户关系和管理团队工作流程方面的经验帮助他为团队提供最佳的整体价值.

iOS Objective-C Swift C++Core Data User Experience (UX)User Interface (UI)Swift 4 Google Maps SDK REST APIs Swift 3 Swift 2 Git GraphQL Fastlane Auto Layout Parse UI/UX

Portfolio

PetrolPrices.com Ltd (via Toptal)

故事板，REST api, RESTful开发，接口生成器，Swift...

Kalon Creative (via Toptal)

Swift, Alamofire, UIKit, ZURB Foundation, Swift 3

Perchwell (via Toptal)

Fabric, Mixpanel, SnapKit, iOS Charts, SDWebImage, Alamofire, Auto Layout...

Experience

Interface Builder - 7 years iOS - 7 years Auto Layout - 6 years Core Data - 3 years Sketch - 3 years Swift - 3 years Core Location - 3 years

Availability

Part-time

Preferred Environment

GitHub, Interface Builder, Swift, Xcode

The most amazing...

...我的感觉是得到了NASA的书面同意，允许我发表我最喜欢的项目, Apollo Archive to the iTunes App Store.

Work Experience

iOS Developer

2016 - 2016

PetrolPrices.com Ltd (via Toptal)

创建了一个像素完美的设计实现，可以在所有iPhone设备上很好地扩展新功能.
识别导致高网络消耗的性能问题并修复它们.
在Swift中创建可重用组件，并将其合并到基于Objective-C的环境中.
Simplified the app by removing unused features, merging menu items together, adding an in-app web browser, and improving the on-boarding flow.

技术:故事板，REST api, RESTful Development, Interface Builder, Swift, Objective-C

iOS Developer

2016 - 2016

Kalon Creative (via Toptal)

Upgraded an existing iOS app from Swift 1.2 to Swift 3.
将已弃用的函数调用替换为其最新版本.
Added minor changes requested by the client.
使用git对升级过程的每个步骤中的源代码进行版本控制.

技术:Swift, Alamofire, UIKit, ZURB Foundation, Swift 3

Senior iOS Developer

2015 - 2016

Perchwell (via Toptal)

创建了一个像素完美的设计实现，在所有iPhone设备上都能很好地缩放.
识别导致用户体验不稳定的性能问题并修复它们.
Optimized memory and CPU time management.
使用15+不同的图表类型实现复杂的数据可视化.

Technologies: Fabric, Mixpanel, SnapKit, iOS Charts, SDWebImage, Alamofire, Auto Layout, Interface Builder, Swift

Lead iOS Developer

2013 - 2015

Red Steed Studios

学习如何将项目划分为具体的任务，以及如何简化和执行这些项目，同时允许变化的空间.
使用多个第三方服务，如Facebook, Google, Imgur, Amazon S3, Branch.io, etc.
作为开发人员和开发团队负责人积极参与项目.

Technologies: Web Technologies, Transport Layer Security (TLS), Location Services, REST, Protocol Buffers, Auto Layout, Interface Builder, Core Data, Objective-C

iOS Developer

2012 - 2014

Pronovix Hungary

Worked as a Full-stack Developer.
Maintained a relationship with clients.
管理项目需求，如设计、实现、测试和跟踪.
为一家咖啡店开发了一个基于PHP后端的iOS应用程序.
为机械表所有者创建了一个应用程序，用于跟踪设备的准确性，并使用原子钟设置时间.

技术:网络时间协议(NTP)， Git, JSON, REST, Drupal, Core Data, Objective-C

C++ Developer

2010 - 2012

GE Healthcare

实施临床研究应用，在CT图像中发现肺癌和肝癌.
将肿瘤搜索算法的速度提高了90%.
成为在CT图像中发现肝脏器官肿瘤的全球专利工作流程的合著者.
创建并实现了一种算法，以便在CT图像中更好地显示肺区域的癌变区域.

Technologies: Image Processing, C++

Experience

Apollo Archive

Apollo Archive is an app for space enthusiasts. 它可以帮助用户浏览阿波罗任务期间拍摄的所有图像，并以高分辨率欣赏它们. 这个应用程序对我来说特别的是我收到了NASA的书面同意，可以免费发布到应用程序商店.

对于这款应用，我并不是唯一的开发者，但是我自己做了UI/UX设计. 我的目标是获得产品开发从构思到生产的第一手经验, 熟悉产品生命周期的各个方面.

PetrolPrices (via Toptal)

http://itunes.apple.com/gb/app/petrolprices.com/id1103318574?mt=8

PetrolPrices.com是英国最大的燃料价格比较服务. 我有幸改进了现有应用程序的功能, and increase its performance and stability.

NYC Apartments by Perchwell (via Toptal)

http://apps.apple.com/us/app/nyc-real-estate-by-perchwell/id1090535139

Perchwell是一款在纽约曼哈顿寻找房产的iOS应用. 它为过滤合适的属性提供了一个很好的接口, comparing them, and calculating expenses. 该应用程序还可以通过各种图表帮助分析房地产市场.

Dryft

Dryft是为那些不想在荒野中迷路的徒步旅行者提供的应用程序. 它会持续记录他们的行踪, 如果他们走得太远或太久，会通知他们, and guides them back to where they started.

Ntice

作为顾问，帮助Ntice团队改进他们现有的应用程序.

我在iOSDevUK的第一次国际演讲

我有幸在欧洲最大的会议之一上发表了关于第三方工具和实践的演讲.

Skills

Languages

Swift 4, Swift 3, Swift 2, Swift, Objective-C, GraphQL, c++， JavaScript, Java

Frameworks

Core Location, Core Data, ZURB Foundation, UIKit

Libraries/APIs

Mapbox iOS SDK, Google Maps SDK, REST APIs, Core Animation, Fabric, Flickr API, Google Maps Premium Roads API, Firebase Web SDK, iOS Charts, Facebook iOS SDK, Alamofire, SDWebImage, SnapKit, Facebook API

Tools

Auto Layout, Git, Sketch, Interface Builder, Fastlane, Crashlytics, Xcode, GitHub, Pivotal Tracker, Adobe Illustrator, Adobe Photoshop

Paradigms

RESTful开发，响应式开发，敏捷软件开发，REST

Platforms

Back4App, Parse, iOS, Firebase, Drupal, Mixpanel

Other

Pixel Perfect, User Experience (UX), User Interface (UI), 3D Image Processing, Medical Imaging, Image Processing, Network Time Protocol (NTP), Location Services, Transport Layer Security (TLS), Web Technologies, Storyboarding, Presentations, Protocol Buffers

Storage

JSON

Education

2016 - 2016

Various Certificates in Aerospace Engineering

MIT, ESA - Online

2011 - 2013

计算机工程与图像处理硕士(未完成)

University of Szeged - Szeged, Hungary

2006 - 2011

Bachelor's Degree in Computer Engineering

University of Szeged - Szeged, Hungary

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