We offer a variety of services such as:

• building greenfield iOS projects
• improving legacy systems
• on-site training
• code review and coaching
• freelance software development

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Essential Developer

First-class iOS engineering with Empathy, Integrity, and Economics in mind. Skilled and disciplined training for iOS professionals and teams.

RT @theswiftist: 25+ video tutorials from @essentialdevcom to build a Swift Quiz App with TDD and Modular Design https://t.co/Dn2XWxjbqa
about 17 hours ago
Did you know that MVC, MVVM, and MVP are not software architectures? 💻⛩ #iOS #iOSDev #SwiftLang https://t.co/PLZolj7Rc0
about 18 hours ago
Culture is more than the story we tell about ourselves and others. Culture is mostly about the past. It’s about wha… https://t.co/NriKW5wxMg
about a day ago
In a programming interview, Hard Skills (e.g. technical) can be measured: "The candidate's Swift knowledge isn't ve… https://t.co/U7xoYeiPgJ
about 2 days ago
*But* considered harmful: "I want a better work environment, *but* I don't spend time building better relationshi… https://t.co/pmNhI7BLRm
about 3 days ago

Caio Zullo

I've been writing software since 1998, professionally since 2006, and on Apple platforms since 2009. I love building robust, well-engineered, and beautiful applications and coaching developers to achieve their best potential.

Mike Apostolakis

I'm a software engineer from Athens, Greece. My goal is to help the software industry evolve by enabling developers and companies to practice valuable techniques and build powerful and durable systems.

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Essential Developer

Caio Zullo

Mike Apostolakis