About Appstack

At Appstack, we are redefining how mobile apps grow through paid ads by providing access to reliable attribution and precise analytics. With our 'Enhanced App Campaigns' protocol, a state-of-the-art solution that enables advertisers to run app campaigns with superpowers, we are helping the most ambitious apps to scale and make more money.

Role Description

As a Senior Mobile SDK Engineer at Appstack, you will be the architect and guardian of our core technology. Our customers are other developers, so your code must be the most stable, performant, and well-documented component of their stack.

You will lead the development and deployment of our SDKs across multiple environments—ensuring that whether a client uses Native, React Native, or Unity, their experience with Appstack is seamless.

Responsabilities

• Multi-Platform Development: Own the lifecycle (design, dev, test, and deploy) of Appstack SDKs for iOS (Swift), Android (Kotlin), and React Native.
• Ecosystem Expansion: Support and maintain our Unity integration (desired) and explore new wrappers as our customer base grows.
• Developer Success: Act as the technical point of contact for clients during onboarding. You’ll help them integrate our SDK, debug their implementations, and provide high-level "pro-code" advice.
• CI/CD & Automation: Build and maintain robust pipelines to automate the testing and distribution of libraries (CocoaPods, SPM, Maven, NPM).
• Technical Writing: Create "gold standard" documentation, sample apps, and integration guides that make onboarding effortless for our users.

Education and experience

• High proficiency in English. At Appstack, we only speak English.
• Experience: 5+ years in mobile engineering, with specific experience building libraries, SDKs, or open-source tools.
• Proven Delivery: You have successfully published and maintained packages in public or private registries.

Tech stack

• Languages: Swift, Kotlin, TypeScript/JavaScript. (C# for Unity is a major plus).
• Tooling: Proficiency with Git, Fastlane, and CI tools (GitHub Actions, Bitrise, or similar).
• Architecture: Deep understanding of concurrency, memory management, and binary size optimization.

Soft skills

• Strong communication skills to collaborate effectively with the team
• Proactive mindset with a focus on delivering high-quality, scalable solutions.
• Attention to detail and commitment to platform stability.
• English fluency is required as the working language at Appstack.

Why Appstack?

• Learn a lot by working with the top 1% of tech talents
• Opportunity to shape the technical foundation and future of a growing startup.
• Work in a dynamic and collaborative environment with modern tools and technologies.
• Drive meaningful impact by owning the platform's key features and shaping the user experience.