iOS Developer (Swift + VIPER + RxSwift)

At 300 Software, we believe technology isn’t a luxury — it’s what separates companies that remain stuck in operational chaos from those that scale with strategy and consistency. We build custom software that solves real business problems, with global clients, lean senior teams, and a culture built on trust, ownership, and results. We’re looking for an

iOS Developer

who is strong with Swift, architecture patterns, and modern mobile engineering practices for one of our clients in Spain. This means that you need to be able to communicate in either English or Spanish.

This professional will work on a

large-scale mobility platform used daily by thousands of users

, helping evolve native apps, improve performance, and implement new features with real impact.

This role is 100% remote and fully integrated with an international team.

Must-Have Skills

Strong experience with

Swift Solid understanding of

iOS frameworks

(Core Data, Core Animation, etc.) Experience with

VIPER architecture Experience with

Moya / Alamofire Experience with

RxSwift Experience with

REST/JSON APIs Experience with

offline storage, threading, and performance tuning Understanding of

Apple design guidelines Git Nice to Have

Objective-C experience CI/CD for mobile Automated tests Experience in apps with high usage volume