Build Iphone App Freelancers

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Alexey Pechnikov

Alexey Pechnikov

GIS and Algorithms Researcher

Russia - Tests: 5 - Portfolio: 9

I have a Master's degree in radiophysics and electronics. In addition to fundamental mathematics and physics knowledge I specialized in computer simulation and computer vision technics. My experience ranges from research to applications. I prefer simple solutions and reliable technologies. I make compact and fast applications having a vast background in producing firmware for embedded devices with relatively small RAM, slow CPU, and very long uptime. Cross-platform programming is not hard, it is the only way :) In addition, I am experienced in full-stack development: * client-side programming (python, R, Tcl/Tk, C), * server-side programming (python, R, C, java, Tcl/Tk, shell scripting), * database programming for PostgreSQL, SQLite, OpenLink Virtuoso, * programming of algorithms, utilities and RDBMS (C, python, R, Tcl), * and some other.

$70.00 /hr
644 hours

Oksana Kovalchuk

Oksana Kovalchuk Agency Contractor

Upwork TOP RATED Senior iOS Developer

Ukraine - Tests: 6 - Portfolio: 10

I'm Senior iOS Developer with 5+ years of iOS development and 7 years summary development experience. I have full understanding the process of commercial software engineering, systems development life cycle and reporting importance. Good skills in decision making, leadership, team building and motivating always help me with my team and my customers. Above is detailed information for people who want to know more ;) Summary of qualifications: 
Experience in requirements analysis, effort estimating and task scheduling got a lot of successfully finished projects and released products. I always pay attention to system usability and to source code quality, because I have respect for colleagues who can at any time to continue my initiative.
 I got a lot of experience of work in agile environments and successfully integrate it to all my projects since 2010 and can create full report of project status in a few minutes, I can react on deadline terms in a good time and find a best solution. 
Experienced in a teamwork and in working individually, I’m a team player with good communication and always ready to help or suggest. I have a real passion for creating applications and believe that interfaces should be easy to use and beautiful. Form and function go hand in hand to create great user experiences and I don’t like to think of them as “one another application” and leave it “as-is”. Technical skills: I have an excellent understanding of user experience, usability, visual style and Apple Human Interface Guidelines (HIG). Also I have strong knowledge of Object Oriented Programming, Objective C language, IOS frameworks and frequently used 3rd party libraries. Good knowledge of web-service communication, data formats and algorithms. Most of them: ✓ Fundamentals: iOS Code architecture and design; Multi-threading, CGD; Deep knowledge and great experience in web services architecture integration (JSON, XML, SOAP) and networking (TCP, HTTP/HTTPS, SSL); Profiling tools (time, CoreData, CPU, allocations); ARC and non-ARc memory management; OS Code architecture and design; Mobile project management; Experienced with publishing applications with iTunes Connect, also with in-App purchases. ✓ Core: CocoaPods, git, git submodules; Facebook KVOController; CocoaLumberjack, NSLogger, PonyDebugger; Reactive programming, Reactive cocoa; CoreFoundation; Experience with creating SDK and Frameworks; Creating and integrating static libraries; Parsers (XML, JSON, HTML), TBXML etc; Working with Blocks and BlockKit (long time ago) ✓ Multimedia: huge experience with Audio and Video (effects, recognition, analysis); CoreAudio and MediaPlayer Framework; FMOD Audio Framework ✓ Databases: CoreData; Realm; CoreData (Magical Record) background sync, creating utility; mogenerator (+ extending default templates, scripts); experience with SQLite, FMDB adapter ✓ UI: Very strong UIKit skills; CoreAnimation, Animation sequences, transforms, layers, shapes (including Facebook Pop); CoreText (NSTextStorage, custom attributes, paths); CoreGraphics; Custom UIViewController transitions; AutoLayout (Masonry etc.); AsyncDisplayKit; GPUImage (photo and video filtering, cropping, etc); Creating custom filters; Collection view custom layouts (very custom); Custom fast camera view; Dynamic phone formatters also reworking Google’s shitty libPhoneNumber; UITableView/cell layout customizations from custom insert/reload/remove animations, to dragging between tables, with animations, placeholders Creating custom iOS8 keyboards; Creating custom calendars, fighting with DST, time-zones changes Separate layouts (iPhone/iPad); Gesture recognizers (managing several recognizers including system gestures); NSLocalization and created my own Localize Framework; Experience with creating applications for multiple screen resolutions/sizes, like iPhone 3G ... iPhone 5, also with supporting iPad, including AutoLayout tool and before autolayout was announced. ✓ Networking: TCP, HTTP, HTTPS, SSL; Web service architecture and integration (JSON, XML, SOAP); Image caching (SDWebImage, FastImageCache); NSURLSession and AFNetworking (prefer first one). ✓ AppStore: In-App Purchasing (including subscriptions and Purchases validation (receipts) ✓ Advertisements: iAd; AdMob; AdColony; Tons of other advertisements platforms (including fixes for their poor SDKs). ✓ Analytics: Crashlytics; Google Analytics; Flurry Analytics. ✓ Tools: Paint Code; Reveal App; Creating custom Xcode plugin. ✓ Third-Party APIs and Libraries: Parse; Twitter; Facebook; Linkedin; Yahoo; Google; FourSquare; VK; PayPal; A lot of others. ✓ Location and Maps: CoreLocation; Location Services; Apple/Google/OSM/Yandex Maps ✓ Push and Local Notifications; Created Local Push Notification Manager. ✓ iOS integration: AddressBook SDK; Keychain; E-mail controller, SMS handler.

Groups: Application Developers Alliance

$55.56 /hr
2,010 hours

Michael Dihardja

Michael Dihardja Agency Contractor

Full stack iOS and Android expert

Indonesia - Tests: 5 - Portfolio: 23

Top Rated oDesk Verified Mobile Developer! In short, I am first and foremost:a coder, and I always do my best to keep up with the high expectations set by my clients. Over the last 7 years, I have developed iPhone / iPad apps for companies such as Motorola, Warner Bros, Valspar, and some familiarity with Android apps. I also have developed a wide range of websites using HTML, JSP, Struts, and MySQL including sites for large companies such as Kenworth and Peterbilt. IF you want: - clean, quality code, memory-leak free software - on-time delivery with constant communications on the project progress - headache-free experience in your part, definitely contact me as I am more than happy to cooperate with you to build the next great app! You can give me the requirements and features that you want on the app, and I will review it and give feedbacks within 12 hours. If I can't do it since it's beyond my expertise, I will say so as to not waste your time, I wouldn't PRETEND to know everything and make you suffer in the future , like what some of the software contractors do. If I'm able to do it, I would contact you so we would arrange the working agreement some more. Hope that summarizes my objective and working ethics quite nicely. Feel free to contact me on any software development opportunities you might have! Mike

Groups: Application Developers Alliance

$88.89 /hr
1,828 hours

Alexander Kozlov

Alexander Kozlov

Top level professional Architect and SW engineer

Russia - Tests: 21 - Portfolio: 5

Make things done! I'm a professional C/C++ developer with more than 12 years of experience. I have been working both for a companies from Fortune 500 list, and a small local companies. My core competency lies in the world of mobile applications, SaaS and PaaS, desktop software and games development. I love to do my work right and really enjoy being respected for the things i do.

$55.56 /hr
1,772 hours

Anthony S.

Anthony S.

Front-end web developer

Russia - Tests: 5 - Portfolio: 4

Hello, my name is Anton, I'm a dedicated Front End developer with 5 years of experience. I have a passion for clean and neat web interfaces that produce seamless user experience. In my everyday work I build: - JavaScript applications, using Backbone and AngularJS frameworks. - Hybrid mobile applications with Ionic, jQuery Mobile, Phonegap. - Modern CSS3, with OOPCSS via BEM methodology, with the help of LESS/SASS. - Visual data representation with D3.js. - Server side JavaScript with Node.js.

$27.00 /hr
10,280 hours

Cristian Lungu

Cristian Lungu

Illustrator/Graphic Designer with more than 10 years experience

Romania - Tests: 1 - Portfolio: 92

I consider myself a creative blend of mixed passion for design, illustration, bold ambition and a taste for innovation. Wherever there's a graphic challenge, I like to stop by. My second nature is to develop ideas that dare the impossible and provide my clients with the most usefully creative tools. I live in a 25 hour day, eat giant spoons of enthusiasm, and I have raised the bar on advertising on the local market for the last 10 years. My work speaks better for itself and while sipping your morning coffee, sugar it with a spin through my portfolio. It is as sweet as it gets!

$40.00 /hr
909 hours

Nagendra B.

Nagendra B.

UI/UX Designer

Canada - Tests: 3 - Portfolio: 12

Hey! I'm from Vancouver, Canada with 4+ years of experience in UI/UX design. I build visual and functional interfaces for web, mobile and desktop. In the last 4 years I have worked with numerous small and large scale companies which are involved in Home security, Health, E-commerce, Organic food, Real estate, Fitness, Education and Entertainment. One of the major one is "Netflix", I helped the in-house design team with visual and UX design skills in designing a web application which helps managers and translators to communicate seamlessly! My Expertise: • Interface Design • Usability • Layout Design • Research & Development • User Experience Design • User Interaction Design Got an idea? Let’s ship it!

$60.00 /hr
321 hours

Geoff Hackworth

Geoff Hackworth

Experienced iPhone/iPad/Watch Developer

United Kingdom - Tests: 15 - Portfolio: 19

I am a highly-skilled software engineer and computer science graduate with 24 years of professional experience. Software development is my greatest skill and I have an incredible attention to detail and perseverance in getting the job done, and done well. I've been developing native Objective-C iOS apps for over 4 years. I don't use tools like PhoneGap or Appcelerator. I have direct experience with Apple's policies, device capabilities and account management procedures from publishing my own apps (see my portfolio for screenshots and iTunes links). By hiring me you would benefit from my extensive skills and experience. Technologies change, but first-class analysis, design, development, testing and debugging skills can only be built from many years of hard work and real-life development experience. I work from home in a distraction-free environment using a Mac with dual 23" monitors. For good test coverage I own several iOS devices: iPhone 4S, iPhone 5, iPhone 5s, 1st generation iPad, 3rd generation iPad, retina iPad mini, iPad Air 2 and 42mm Apple Watch. I don't believe you can get the true "feel" of an app by just using the simulator. For client testing, I can use TestFlight to deliver builds throughout the project. Thanks for taking the time to read my profile. I'm looking forward to working with high-quality product designers and creating some great apps together.

$44.44 /hr
1,412 hours

Salvatore B.

Salvatore B.

Top Rated iOS/Mobile Development Master

Spain - Tests: 18 - Portfolio: 23

Featured as success story on Upwork: LinkedIn article at !!! Called to be part of the “Upwork PRO” special category: I'm especially succesfull managing integrated mobile projects (iOS/Android/backend), where I can outline the design and the architecture of the system, act as senior iOS developer and manage and coordinate the backend/frontend developers to create bug-free, performant, shiny and reliable apps. Also getting great feedbacks while assisting startups and entrepreneurs in turning ideas into apps, suggesting easy and stable solutions based on my large experience and leading the preliminary process prior to the actual development. I've been working on iOS/Android projects for the last seven years, using almost any related technology: Maps, Web Services, Parse,com, Push Notifications, Core Data/SQLite databases, regular expressions, Augmented Reality, barcodes handling, etc. Also, during the last five years I've started managing large mobile projects, acting as analyst/architect and leading teams of developers. My previous experience: From 2000 to 2009, I have developed a wide range of ISDN/SS7 telephony based applications on Intel/Dialogic hardware, using Asterisk, MS SQL Server, Oracle, C/C++, Delphi, Java and .NET, including applications for major telephony providers in Italy. I speak fluent English, Spanish and Italian.

Groups: Application Developers Alliance

$88.89 /hr
12,148 hours