Senior iOS Engineer, User Authentication (Kotlin)

About Voodoo

Founded in 2013, Voodoo is a tech company that creates mobile games and apps with a mission to entertain the world. Gathering 800 employees, 7 billion downloads, and over 200 million active users, Voodoo is the #3 mobile publisher worldwide in terms of downloads after Google and Meta. Our portfolio includes chart-topping games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz.

Team

The Engineering & Data team builds innovative tech products and platforms to support the impressive growth of their gaming and consumer apps which allow Voodoo to stay at the forefront of the mobile industry.

Helix is our flagship Ad-Network team of around 60 top-tier engineers and data scientists spanning backend, mobile SDKs, data engineering, infrastructure, and AI. Helix has evolved beyond powering Voodoo's own gaming portfolio—our technology is now directly integrated into games from external, third-party publishers worldwide.

Operating across millions of third-party devices in real-time bidding environments creates unique technical challenges around SDK performance, ultra-low latency, and intelligent automation.

Within Helix, you’ll join the AdExperience squad—a focused team of Senior Product Managers, QA/Release Engineers, and five exceptional Senior Engineers specialized in backend and mobile SDK development. Together, you will push the boundaries of iOS SDK architecture and champion modern, agentic AI workflows to set new industry standards.

Role

We’re looking for a visionary and talented Senior iOS Engineer to join our dynamic, passionate, and committed to excellence team at the forefront of advertising technology!

As a Senior iOS Engineer, you will drive the development of cutting-edge SDKs, influencing the experience of millions of users across diverse devices. A pivotal member of our engineering team, you will help shape the direction of our iOS technical efforts while serving as a high-impact, hands-on individual contributor.

• Technical Vision & Code Standards: Guide the technical direction for our iOS projects. Drive innovation, establish architectural best practices, and ensure the highest standards of code craftsmanship across our codebase.

• AI Usage & Agentic Workflows: Raise the bar in AI adoption across the team—actively integrating agentic workflows, LLMs, and AI-driven automation tools to solve complex challenges and elevate developer productivity.

• Code Excellence: Craft robust, maintainable, and high-performance code that sets industry benchmarks as a senior hands-on individual contributor.

• Collaborative Code Reviews: Actively participate in thorough code reviews, fostering a culture of continuous technical improvement and knowledge sharing within the engineering team.

• Architectural Decisions: Make critical decisions regarding the architecture and technical stack of our iOS SDKs and applications to ensure long-term stability and scalability.

• Quality Assurance: Guarantee the enduring quality and reliability of our iOS projects through rigorous testing, performance profiling, and continuous integration practices.

Profile

• 6/7+ years of experience in mobile software development.

• 5 years minimum in Swift.

• Strong proficiency and proactive mindset towards leveraging AI technologies (e.g., agentic AI, LLMs, AI coding assistants) to enhance software development efficiency and code quality.

• Excellent problem-solving, critical thinking, and communication skills.

• Demonstrated ability to make critical technical decisions independently.

• Extensive experience in writing robust, maintainable, and high-performance Swift code.

• Writing efficient unit tests, integration tests, and UI tests.

• In-depth knowledge of iOS development tools, frameworks (SwiftUI, Combine, and CoreData), and best practices (MVVM, Protocols, Delegates).

• Excellent level of spoken English.

Nice to have

• Previous experience in the AdTech industry or in mobile ads integration.

• Experience with SDK development and a deep understanding of the challenges and opportunities in this space.

• Experience in Objective-C, Kotlin, Node.

• Practical experience setting up or customizing AI developer agents and automated AI workflows.

• Experience in optimizing App performance, reducing memory footprint, and decreasing package size.

• Experience in deploying iOS frameworks on CocoaPods.

• Experience in deploying iOS applications with CircleCI and Fastlane.

• Working knowledge of remote APIs, concurrency, layouts, transitions, animations.

Our Stack

⧫ Xcode ⧫ Swift ⧫ Objective-C ⧫ SwiftUI ⧫ Combine ⧫ CoreData ⧫ GitHub ⧫ CocoaPods ⧫ CircleCI ⧫ AWS ⧫ AI Coding Tools & Agentic Workflows

Benefits

• Competitive salary based on experience

• Swile Lunch voucher

• Gymlib (100% covered by Voodoo)

• Premium healthcare coverage with SideCare, 100% covered for you and your family

• Wellness activities in our Paris office

• Remote Fridays

Location

Tbilisi; hybrid work format with flexible hours.

About the company

A global financial analysis platform serving over 100 million users in more than 180 countries, with tools for charting, market data, collaboration, and publishing used by both individuals and large companies.

The mobile product direction includes several teams covering subscriptions and monetization, data-driven screens and charts, external service integrations, and key user-facing sections.

Responsibilities

• Develop and maintain high-quality iOS code in Swift, with attention to architecture and long-term maintainability
• Build complex screens and interface behavior using UIKit, SwiftUI, and CoreAnimation, including asynchronous logic and multithreading with GCD and Swift Concurrency
• Optimize performance, investigate complex stability issues, and integrate with backend APIs to ensure correct client-side behavior
• Collaborate with product, design, and QA, participate in code reviews, and share expertise across the team

Requirements

• 4+ years of iOS application development experience, with strong Swift skills and hands-on UIKit and SwiftUI experience
• Proven ability to build complex screens and maintain a stable user experience across devices, including performance optimization
• Good understanding of Clean Architecture and practical experience with VIPER and MVVM, plus multithreading using GCD and Swift Concurrency
• Strong knowledge of iOS platform design principles and interface guidelines, with CoreAnimation experience; knowledge of algorithms and data structures, finance or trading domain experience, and product familiarity are a plus

Location

Remote, with no country restrictions specified.

About the company

A financial institution providing retail and corporate banking, lending, deposits, payments, and digital banking services.

The project is a digital banking SuperApp that integrates iOS and Android apps, backend services, banking products, and external systems.

Responsibilities

• Develop and maintain iOS features for the SuperApp, including integrations with external partners and third-party APIs.
• Implement networking, authentication, data mapping, error handling, and integration business logic following architecture standards.
• Write unit and UI tests, and troubleshoot functional, performance, and integration issues across iOS versions and devices.
• Collaborate with backend, QA, Android, Java, DevOps, and product teams throughout the development lifecycle.

Requirements

• 1.5+ years of commercial iOS development with Swift, plus good knowledge of UIKit and SwiftUI.
• Experience with fintech, payments, or financial applications, including REST API and third-party service integration.
• Understanding of MVVM or similar architecture, asynchronous programming, networking, JSON parsing, error handling, Git, and dependency management (SPM/CocoaPods).
• English at Intermediate+ or above; familiarity with banking solutions, CI/CD, App Store releases, Clean Architecture, UI testing, and secure handling of financial data is a plus.