Middle +/ Senior iOS Developer

Toggle is a product company building eSIM and VPN solutions for global connectivity across all major platforms, including mobile, desktop, and TV.

Role Overview

We are looking for a Senior iOS Developer to join our dynamic and experienced development team.
This is an excellent opportunity to take on significant responsibility and play a key role in making important technical decisions.

If you are motivated to have a real impact on the product, create innovative solutions, and see the direct results of your work, this is the perfect place for you.

Responsibilities

• develop, test, and debug new features, both in UI and core components, including network protocols and network-specific features;
• support, fix bugs, profile, and optimize existing solutions
• conduct code reviews and share knowledge;
• develop new applications and work on existing applications and codebase.
• analyze, discuss, and optimize business requirements in collaboration with other teams: QA, Design, and Product Owner;
• estimating and planning tasks for new features in collaboration with and coordination across other teams;
• discuss and develop technical solutions for core features;
• improve internal libraries and the shared codebase.

What We Expect from You

• over 3 years of experience in iOS development. Understanding the iOS application lifecycle: from preparing requirements to distribution;
• strong understanding of key concepts of VPN apps and network applications, both from a user's perspective and a developer’s point of view;
• swift/Objective-C: deep understanding of key runtime concepts and APIs, including message forwarding, method swizzling, etc;
• technologies: advanced knowledge of Design Patterns, Architectural Design Principles (SOLID, IoC, etc.), Data Structures, REST APIs, Networking, OSI model, UDP/TCP, IP routing, DNS, Berkeley sockets API;
• iOS Multithreading API: strong expertise in various API groups (GCD, coroutines, threads, queues, POSIX) with practical experience in thread synchronization models and their implementations in the iOS SDK;
• frameworks: extensive experience working with Foundation, Network, NetworkExtensions, SwiftUI, UIKit, and CoreAnimation;

• good proficiency in working with documentation;

• willingness and readiness to work with AI agents as standard tools for development;

• motivation and passion for creating exceptional applications for all Apple platforms;

• strong technical English proficiency to work with documentation.

• strong communication skills and the ability to work effectively in a team;

• willingness to adapt to changing product requirements and new situations;

• problem-solving skills with a proactive approach to technical issues;

• fast learner with the ability to quickly grasp new concepts and technologies.

Perks

• official employment and a competitive salary;

• paid vacation+5 personal days per year;

• full-time role with flexible start times and a hybrid setup (4 days in the office, 1 remote);

• support for growth: we cover professional courses, books, and conferences;

• private health insurance (including dental and/or medication coverage);

• internal English language courses in small groups (up to 6 people);

• fast skill growth in a startup-paced environment;

• a culture of openness, respect, and honest feedback;

• minimal bureaucracy — maximum impact and momentum.

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