Project Challenges | Learning Center | Interview Kit | iOS All Stars
Feeling nervous about an upcoming coding challenge and unsure what to expect? Relax—this repository will be your best buddy!
This collection gathers a wide range of coding challenges tailored for mobile developers, along with valuable resources such as learning materials, recommended developers to follow, and interview prep guides, from many kinds of sources like books, articles, and more. You’ll also find code tests used by various companies, making this the perfect resource to help you confidently prepare for that fearsome and challenging interview.
| Country | Company | Status | Glassdoor Reviews | Challenge | LinkedIn Positions |
|---|---|---|---|---|---|
| Rio de Janeiro, Brazil | Hurb | 🟢 | ★★★ | Challenge | |
| San Francisco, USA | Shrtlist | 🟢 | Unknown | Challenge | Unknown |
| San Francisco, USA | Varo Bank | 🟢 | ★★★ | Challenge | |
| Bentonville, USA | Walmart | 🟢 | ★★★ | Challenge | |
| Tokyo, Japan | Mercari | 🟢 | ★★★ | Challenge | |
| New York, USA | JPMorgan Chase | 🟢 | ★★★★ | Challenge | |
| Docklands, Australia | Medibank | 🟢 | ★★★ | Challenge | |
| Hamgurg, Germany | Haiilo | 🟢 | ★★★ | Challenge | |
| Vaduz, Liechtenstein | Ethersuite | 🟢 | ★ | Challenge | |
| London, UK | RDX Works | 🟢 | ★★★★ | Challenge | |
| Bengaluru, India | Geektrust | 🟢 | ★★★★ | Challenge | |
| Amsterdam, Netherlands | Adyen | 🟢 | ★★★ | Challenge | |
| Barueri, Brazil | Digio | 🟢 | ★★★ | Challenge | |
| New York, USA | JOOR | 🟢 | ★★★ | Challenge | |
| Stavanger, Norway | One Code | 🟢 | ★★★ | Challenge | |
| Houston, USA | Gonet USA | 🟢 | ★★★ | Challenge | |
| London, UK | Streetbees | 🟢 | ★★★ | Challenge | |
| Costa Mesa, USA | FightCamp | 🟢 | ★★★★ | Challenge | |
| Vilnius, Lithuania | KaChing | 🟢 | Unknown | Challenge | |
| Waltham, USA | Mobiquity | 🟢 | ★★★★ | Challenge | |
| London, UK | Badoo | 🟢 | ★★★★ | Challenge | |
| San Salvador, El Salvador | Real Action Soft | 🟢 | Unknown | Challenge | Unknown |
| Stockholm, Sweden | KRY | 🟢 | ★★★ | Challenge | |
| Prague, Czech Rep. | STRV | 🟢 | ★★★★ | Challenge | |
| Unknown | Keys.AI | 🟢 | Unknown | Challenge | Unknown |
| New York (2009), USA | Goliath National Bank | 🟢 | ★★★★★ | Challenge | |
| Los Angeles, USA | AppScience | Sabio | 🟢 | ★★★★ | Challenge | |
| New York, USA | Gemography | 🟢 | ★★★★ | Challenge | |
| Cardiff, UK | Circle | Aro Tech | 🟢 | ★★★★ | Challenge | |
| London, UK | Rightmove | 🟢 | ★★★ | Challenge | |
| Rio de Janeiro, Brazil | ALLOS | 🟢 | ★★★★ | Challenge | |
| Hyderābād, Índia | Aliens Developers | 🟢 | ★★★ | Challenge | |
| Austin, USA | Roof Stacks | 🟢 | ★★★ | Challenge | |
| Berlin, Germany | Audibene GmbH | 🟢 | ★★★ | Challenge | |
| Quebec, Canada | Beet Solutions | 🟢 | ★★ | Challenge | |
| Chicago, USA | Tandem | 🟢 | ★★★ | Challenge | |
| Los Angeles, USA | Mav Farm | 🟢 | Unknown | Challenge | |
| Texas, USA | Axxess | 🟢 | ★★ | Challenge | |
| San Francisco, USA | BloomTech | 🟢 | ★★★ | Challenge | |
| San Francisco, USA | Rune Labs | 🟢 | ★★★★ | Challenge | |
| Los Angeles, USA | Xplor | 🟢 | ★ | Challenge | |
| Kuala Lumpur, Malaysia | LOKI | 🟢 | ★★★ | Challenge | |
| London, UK | TAB | Kin + Carta | 🟢 | ★★★ | Challenge | |
| Indiana, USA | TUI | 🟢 | Unknown | Challenge | |
| San Francisco, USA | Tubi | 🟢 | ★★★ | Challenge | |
| Berlim, Germany | German Autolabs | 🟢 | ★★★★ | Challenge | |
| Provo, USA | DevMountain | 🟢 | ★★★★ | Challenge | |
| Brooklyn, USA | Alt Tab Consulting | 🟢 | ★★ | Challenge | |
| New York, USA | TicketChat | 🟢 | Unknown | Challenge | Unknown |
| Rio de Janeiro, Brazil | Peixe Urbano | 🟢 | ★★★ | Challenge | |
| Unknown | Unknown | 🟢 | Unknown | Challenge | Unknown |
| Limeira, Brazil | Kabum! | 🟢 | ★★★ | Challenge | |
| Toronto, Canada | 500px | 🟢 | ★★★ | Challenge | |
| Paris, France | Aircall | 🟢 | ★★★ | Challenge | |
| Brazil | BTG Pactual | 🟢 | ★★★ | Challenge | |
| Madrid, Spain | Cabify | 🟢 | ★★★★ | Challenge | |
| Sao Paulo, Brazil | Ciclic | 🟢 | ★★★ | Challenge | |
| Sao Paulo, Brazil | iCasei | 🟢 | ★★★ | Challenge | |
| Sao Paulo, Brazil | Claro Brasil | 🟢 | ★★★★ | Challenge | |
| Rio de Janeiro, Brazil | Concrete Solutions | 🟢 | ★★★★ | Challenge | |
| Poznań, Poland | Snowdog Apps | 🟢 | ★★★★ | Challenge | |
| Sao Paulo, Brazil | Viva Decora | 🟢 | ★★★★ | Challenge | |
| Brooklyn, USA | VICE Media | 🟢 | ★★ | Challenge | |
| Toronto, Canada | TradeRev | 🟢 | ★★★ | Challenge |
| Category | Name | Source | Price |
|---|---|---|---|
| Books | Awesome iOS Books | Link | Paid |
| Books / Course | obj.io | Link | Paid |
| Books / Course | Nil Coalescing | Link | Paid |
| Books | Best in Class | Link | Paid |
| Course | Essential Developer | Link | Paid |
| Course | Let's Build That App | Link | Paid / Free |
| Articles | Swift By Sundell | Link | Free |
| All in One | Hacking With Swift | Link | Paid / Free |
| All in One | Kodeco | Link | Paid / Free |
| Course | Stanford CS193p | Link | Free |
| Course | iOS Development for Creative Entrepreneurs Specialization | Link | Paid / Free |
| Course | Meta iOS Developer Professional Certificate | Link | Paid / Free |
| All in One | Appcoda | Link | Paid / Free |
| Course | DesignCode.io | Link | Paid |
| All in One | Refactoring Guru | Link | Paid / Free |
| Category | Name | Source | Price |
|---|---|---|---|
| Code Challenges | UCoder | Link | Free |
| Code Challenges | Leetcode | Link | Paid / Free |
| Code Challenges | Hacker Rank | Link | Free |
| Code Challenges | Code Wars | Link | Free |
| Math Challenges | Project Euler | Link | Free |
| General Questions | Interview Cake | Link | Paid |
| iOS Questions | Hacking with Swift | Link | Free |
| iOS Questions | iOS Interview Questions | Link | Free |
| iOS Questions | Turing | Link | Free |
| System Design | System Design Interview | Link | Paid |
| System Design | Leetcode Discussions | Link | Free |
| System Design | System Design Primer | Link | Free |
| iOS Questions/Problems | Leetcode + Swift | Link | Free |
| Talk About | Name | Spoken Language | Source |
|---|---|---|---|
| iOS Development and Swift | Dmitry В | English | Link |
| Software Development and Career | Kevin Topollaj | English | Link |
| iOS and Mentorship | Caio Zullo | Portuguese | Link |
| Software Development and Carrer | Fabio Akita | Portuguese | Link |
| Mobile Architecture and Development | Naresh Kukkala | English | Link |
| Software Development | César Giupponi | Portuguese | Link |
| iOS Development | Marcelo G. Costa | Portuguese | Link |
| iOS Development | Vincent Pradeilles | English | Link |
| Mobile Engineering and Carrer | Bullas Attekita | Portuguese | Link |
| iOS Development | Jordan W. Morgan | English | Link |
| iOS Development | Brian Voong | English | Link |
| iOS Development | Paul Hudson | English | Link |
| iOS Development | John Sundell | English | Link |
| Software Engineering | Alex V. Bush | English | Link |
IMPROVE the repository by adding new challenges, technical material, interview resources, recommended developers to follow, or anything you believe will benefit the iOS developer community. New sections with additional resources and fresh ideas that help developers prepare for Any-level interviews are always welcome.
SHARE this repository with friends, colleagues, or anyone gearing up for their next interview or seeking new opportunities. Remember, everyone was once at the beginning of their career or striving to reach their dream job. Together, we can help each other succeed!
Inspired by @felipefialho awesome repository Front-End Challenges