Błażej Biesiada, Developer in Kraków, Poland
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Błażej Biesiada

Verified Expert  in Engineering

Bio

As a technology geek, Błażej got into programming early on. His first platform of choice was PalmPilot, a leading PDA device in the 90s and the predecessor of today's smartphones. What started as a hobby later shaped his whole career. He is driven by his passion for ubiquitous computing and the specific challenges imposed on software by mobile devices. Błażej can work on any project within Apple's ecosystem, including iOS, iPadOS, watchOS, tvOS, and macOS.

Portfolio

Toptal
VoIP, Animation, Swift, Xcode, Apollo, GraphQL, Sinch SDK, Sourcery...
Brainly
iOS, Unit Testing, Localization, Automated UI Testing, Rebranding...
Prismake
Objective-C, Xcode, IT Project Management, Sales, Clients...

Experience

  • iPhone - 14 years
  • iOS - 14 years
  • Objective-C - 14 years
  • UIKit - 14 years
  • Software Architecture - 10 years
  • Scrum - 7 years
  • Unit Testing - 7 years
  • Swift - 6 years

Availability

Part-time

Preferred Environment

OS X, Xcode, Slack

The most amazing...

...thing I've done was start developing in iOS before Apple opened the App Store. I built an application for Numote that hit the App Store in 2010.

Work Experience

Senior iOS Engineer | Mobile Team Lead

2016 - 2022
Toptal
  • Helped sourcing engineers and build Toptal Core's mobile team, leading it for a year. Toptal Core is the internal team behind the Toptal platform.
  • Took over and expanded an experimental iOS application for Toptal talents using Swift and iOS.
  • Kicked off a new project and delivered an animation-rich VOIP iOS application for Toptal clients.
  • Helped to kick off, deliver, and maintain the Toptal Talent iOS application.
Technologies: VoIP, Animation, Swift, Xcode, Apollo, GraphQL, Sinch SDK, Sourcery, Team Management, SDWebImage, OHHTTPStubs, CocoaPods, CocoaLumberjack, Sentry, Rollbar, Software Architecture

Senior iOS Engineer

2015 - 2016
Brainly
  • Contributed to modernizing Brainly's iOS application. It included architecture changes with code modularisation, introducing Swift, adding unit and UI testing, and setting up continuous integration and deployment automatization.
  • Worked on a complete UI rebranding of the existing application.
  • Implemented the A/B testing infrastructure and collaborated with Brainly's internal data analytics team on growing hacking when introducing new features.
Technologies: iOS, Unit Testing, Localization, Automated UI Testing, Rebranding, Data Migration, Architecture, Swift, Objective-C, A/B Testing, Growth Hacking, Scrum, Xcode, Fastlane, Optical Character Recognition (OCR), Branch.io, iPad, iPhone, UIKit, Fabric, Crashlytics, Google Analytics, Kissmetrics, OCMock

Partner and iOS Engineer

2014 - 2015
Prismake
  • Co-founded a boutique mobile software house specializing in iOS software.
  • Worked on client projects targeting diverse iOS and macOS applications, including an augmented reality travel guide, a social network client, and an app for conducting media-rich surveys.
  • Sourced clients, potential leads, and new employees.
Technologies: Objective-C, Xcode, IT Project Management, Sales, Clients, Software Architecture, Technical Hiring

Co-founder and Software Engineer

2013 - 2014
Efento
  • Co-founded a company producing wireless environmental sensors.
  • Spearheaded the software development process and overall system architecture.
  • Built the initial versions of the iOS and Android Bluetooth low-energy apps, Ruby on Rails cloud services, and the corporate website.
Technologies: Bluetooth Low Energy (LE), Core Bluetooth, Bluetooth Beacons, iOS, Xcode, IT Project Management, Prototyping, Sales

Lead iOS Engineer

2011 - 2013
Zendesk Sell (formerly Base CRM)
  • Built Base CRM's iOS and macOS applications featuring local Core Data storage combined with a novel cloud synchronization technology.
  • Helped hire talented mobile engineers and supervised the students' internship program.
  • Led a team of nine developers specializing in Objective-C.
Technologies: Team Management, IT Project Management, iOS, iPhone, iPad, MacOS, Objective-C, Core Data, Training, Conference Speaking

iOS Engineer

2010 - 2011
Numote
  • Developed Numote Live, a second-screen application for iPhone and iPad.
  • Built the Numote Live iOS framework for third-party developers.
  • Maintained Numote's social TV guide for iOS, which worked as a separate app.
Technologies: Objective-C, Xcode, Jira

Partner and Mobile Software Engineer

2004 - 2010
JabeSoft
  • Built and maintained StockBroker, a Palm OS application for stock portfolio management.
  • Started developing solutions for the iPhone operating system in March 2018.
  • Built a bespoken iPhone game and a personal budgeting application.
Technologies: Palm OS, Objective-C, Xcode, Visual Basic, Customer Support, Beta Testing

Experience

Toptal Talent

https://apps.apple.com/us/app/toptal-talent/id1378985638
An iOS application for Toptal freelancers that allows them to search for new jobs, schedule interviews, and browse and manage current engagements. I was part of the iOS engineering team that created the application from scratch. This project allowed me to work on all aspects of the mobile software development process, from early concepts through beta testing, the final polished product, and long-term maintenance and improvements.

Education

2005 - 2010

Master of Science Degree in Engineering, Applied Computer Science

AGH University of Science and Technology - Krakow, Poland

Skills

Libraries/APIs

Nimble-Snapshots, CocoaPods, Fabric, SDWebImage, OHHTTPStubs, Rollbar

Tools

Xcode, Sentry, SwiftGen, SwiftLint, Sourcery, Crashlytics, Google Analytics, Fastlane, Branch.io, Slack, Sinch SDK, Jira

Languages

Objective-C, Swift, GraphQL, Visual Basic

Frameworks

UIKit, CocoaLumberjack, SwiftUI, Combine, Core Bluetooth, Core Data

Paradigms

Unit Testing, Scrum

Platforms

iOS, Kissmetrics, OS X, Bluetooth Low Energy (LE), MacOS

Other

Architecture, iPhone, Software Architecture, Localization, Automated UI Testing, Rebranding, Data Migration, A/B Testing, iPad, Apollo, Nimble, Growth Hacking, Optical Character Recognition (OCR), Reveal, OCMock, Software Engineering, Algorithms, Data Structures, Neural Networks, Genetic Algorithms, Digital Signal Processing, Image Processing, VoIP, Animation, Team Management, IT Project Management, Sales, Clients, Technical Hiring, Bluetooth Beacons, Prototyping, Training, Conference Speaking, Palm OS, Customer Support, Beta Testing

Collaboration That Works

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