Senior IOS Developer Cluj-Napoca

Senior IOS Developer
Cluj-Napoca
Cluj-Napoca, Cluj County, Romania

As a Senior IOS Developer you create and integrate
- of the art application software, for example for operating equipment, image and data analysis, process management, and providing insight into information.

In this role, your focus is on
- friendliness, quality, innovation speed, and cost efficiency. This way, Sioux's application software team supports clients in the semiconductor, medical, and analytical industries in developing and bringing to market distinctive and competitive products.

What excites you as a Senior IOS Developer?

From our Cluj-Napoca office, in Romania’s
- driven second city, you join a vibrant IT scene. The city blends startups, global firms, and top universities. You will fit our team if you like to:

Design, develop, and maintain a robust and
- friendly i
OS application for one of our customers, ensuring high performance, responsiveness, and adherence to Apple's Human Interface Guidelines.

Collaborate closely with designers,
- end developers, and product managers to define, design, and ship new features that align with product vision and user needs.

Contribute to technical discussions and architectural decisions for i
OS solutions, including selecting appropriate frameworks, libraries, and design patterns, with a strong focus on resource management.

Actively participate in the design and implementation of CI/CD pipelines for i
OS applications, ensuring automated testing, build, and deployment processes.

Lead efforts in optimizing application performance, memory usage, and battery consumption, utilizing Apple's profiling tools (e. g. , Instruments).

Sound good so far? We'd love to tell you more…

Your future workplace

This is what you bring to the table

Mobile Development Expertise – Over 5 years of proven experience in mobile application development with a primary focus on i
OS, utilizing Swift and Objective-C.

i
OS Ecosystem Mastery – In-depth knowledge of UIKit, Swift
UI, Foundation, Core Data, Core Animation, Grand Central Dispatch (GCD), and Combine, along with modern i
OS architecture patterns, software design principles, and asynchronous programming paradigms.

Testing & Code Quality – Hands-on experience with unit, integration, and UI testing frameworks, strong proficiency in dependency injection, and adept at debugging and resolving complex i
OS stack issues.

Networking & Data Persistence – Skilled in using URLSession and
- party networking libraries, with expertise in data persistence solutions such as Core Data, Realm, and SQLite.

Best Practices & App Store Delivery – Deep understanding of i
OS development best practices including accessibility, internationalization, and performance optimization, with proven success in publishing and managing apps on the Apple App Store following submission guidelines and review processes.

Collaboration & Communication – Proficient with Git and collaborative workflows, complemented by excellent communication skills for conveying complex technical concepts to diverse stakeholders.

Background Operations Proficiency – Extensive experience implementing efficient background tasks using Background
Tasks framework (BGApp
Refresh
Task, BGProcessing
Task), background URLSession configurations, remote/background push notifications, and modes like Location Updates, Vo
IP, and Audio—ensuring performance, battery efficiency, and compliance with system constraints.

This is what you can expect in return

You will work with passionate colleagues who share your drive for technology and business success.

You get a lot of freedom and responsibility; after all, you know exactly what you are doing.

A welcoming environment with opportunities for personal development and professional growth.

You'll work in a prime location with easy access to public transport and nearby amenities. The office’s innovative design and focus on
- being create a space where creativity and projects thrive.

Flexible 40-hour working week, with room to work from home.

We also find it important to have fun together. We organize a lot for our employees, from Christmas parties with Santa and families and rooftop parties, to inspiring knowledge sessions for the
- tech community.

Fun
- building activities.

High-Tech, High-Fun, High-Value.

We can tell you all about the typical Sioux-culture and the
- tech challenging projects. About how you can develop yourself, like nowhere else. But we’d rather have you hear it from our own employees.

If you want to know more about our challenging projects, please

Important note:

This position requires access to controlled technology, as defined in the US Export Administration Regulations (15 C. F. R. § 730, et seq. ). Qualified candidates must be legally authorized to access such controlled technology prior to beginning work. Business demands may require Sioux to proceed with candidates who are immediately eligible to access controlled technology.