Senior Mobile SDK Engineer

MWDN•Madrid, MD

4d•Hybrid

About The Position

Our client is building a groundbreaking loyalty platform for mobile gamers, and we're seeking passionate individuals to form the foundation of the engineering team. The product mission is to empower gamers with a new way to discover games, connect with their friends, and earn fantastic rewards. Joining us, you will get to build the highest quality consumer app in one of the hottest domains in the gaming industry, and make real measurable business impact. With tens of thousands of daily active users and over a hundred games on the client's platform, they are growing fast. Join us and let's open a whole new market together. You'll be the first dedicated engineer on the SDK, owning architecture, public API, releases and the partner experience end to end.

Requirements

5+ years engineering, substantial Unity/C# shipped to iOS and Android.
You've built or core-contributed to a library or SDK other developers consume, with opinions on API design and backward compatibility.
Deep knowledge of the Unity mobile build pipeline.
Comfortable below C# in Kotlin/Java and Swift/Obj-C to build bridges and debug platform behaviour.
Profiling discipline, and strong written English.

Nice To Haves

A monetization SDK — offerwall, rewarded video, mediation — or attribution and deep-linking at an MMP.
Mobile game development or live-ops
Reward-fraud work.

Responsibilities

Design and build the SDK: in-game placement components, app-to-app handoff, deep linking, and the referral identifier that survives the store visit and install.
Build the native layer: iOS and Android bridges, IL2CPP, Gradle and Xcode plugin plumbing, coexistence with the other SDKs in the build.
Hold size, cold-start and frame-time budgets, enforced in CI.
Own versioning, UPM/Asset Store distribution, Unity LTS support, and migration paths.
Build the test surface: sample game, cross-version build verification, integration tests, debug mode, and the docs.