Senior Mobile SDK Engineer

Posted 2 Days Ago
Hiring Remotely in Georgia, USA
Remote
Senior level
Information Technology • Consulting
The Role
Design, develop, and own a cross-platform mobile SDK for Unity-based games. Build native iOS and Android components with Unity integration, define APIs and architecture, manage packaging and releases, ensure compatibility across platforms and devices, monitor performance, and provide ongoing support. Collaborate with engineering leadership, identify technical risks, and independently drive solutions throughout the SDK lifecycle.
Summary Generated by Built In
Description

MWDN is a global IT outstaffing company with 23+ years of experience that connects exceptional tech talent with leading companies across Israel, the USA, Great Britain, and Western Europe. We offer opportunities to work on international products in a stable and professional environment.

Why does MWDN rock?

Here’s what you can expect when you join MWDN:

  • Security: We carefully vet our clients to minimize risks and ensure reliability and timely payments - no fraud or unpleasant surprises.
  • Career support: If a project isn’t the right fit, we support you and actively help find new opportunities that match your skills and career goals.
  • Legal assistance: We provide guidance on legal matters, including opening and managing your independent contractor or sole proprietorship status, taxes, and related processes.
  • Professional development: We offer English courses and professional growth opportunities, as well as team-building events.

Why choose us? MWDN is ranked among the top 5 IT employers in our region according to DOU. We take pride in our transparency and strong commitment to our team. Curious to learn more? See what our employees say about working with us on DOU.

What is your new project?

Domain: Gaming

Location: US/Israel

Company size: 11-50 employees

Founded in: 2025

What makes this project exciting?

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. 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 clients platform, there 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.

What makes you a great fit
  • 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 have

  • A monetization SDK — offerwall, rewarded video, mediation — or attribution and deep-linking at an MMP.
  • Mobile game development or live-ops
  • Reward-fraud work.
Your day-to-day in this position
  • 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.
Why work with us?
  • People-first management with minimal bureaucracy
  • A friendly company culture, proven by employees who choose to return
  • Flexible working hours
  • 29 days of PTO (18 working days per year pluse all national holidays)
  • 10 paid recovery days
  • Full financial and legal support for independent contractors
  • Free English classes, with native speakers or Ukrainian teachers
  • Dedicated HR support
Our next steps

✅ Intro call with a Recruiter— ✅ Intro call with client — ✅ Home Assignment — ✅ Technical interview — ✅ Offer

Skills Required

  • 5+ years of professional software development experience
  • Hands-on experience developing mobile SDKs used within Unity applications
  • 3+ years of relevant Unity SDK development experience
  • 2+ years of native mobile development experience
  • Strong understanding of Unity and integration between Unity/C# and native mobile code
  • Professional experience with native Android development using Kotlin
  • Professional experience with native iOS development using Swift
  • Understanding of mobile application lifecycles, performance, threading, and debugging
  • Experience leading or taking substantial ownership of an SDK initiative
  • Strong communication skills and ability to explain technical decisions clearly
  • High ownership, internal motivation, and ability to work independently
Am I A Good Fit?
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The Company
Warszawa
143 Employees
Year Founded: 2002

What We Do

MWDN bridges the gap between your business and the top-tier talents worldwide. With strategically located delivery centers across Central and Eastern Europe, MWDN empowers startups and established businesses in the USA, Europe, and Israel. Let MWDN connect you to the talent that turns the impossible into reality. What we offer: ✔️200+ in-house software development and tech engineers – a global pool of IT and digital experts ✔️60% saving on direct labor costs and other payment plans for tight-budget projects ✔️20 years of experience in healthcare, logistics, fintech, cybersecurity, and manufacturing software ✔️24/7 assistance with your remote teams, regardless of their location Our services: - Staff augmentation - Dedicated teams - R&D team extension - Global IT recruitment Our expertise: - Transportation and logistics - Cybersecurity - FinTech - Blockchain - Construction - Medical sphere and healthcare - Telecommunication - ATS - GameDev We personalize our services for each client, and some of them have stayed with us for years! See what they say. SHARON VIENTE - Co-Founder & CTO Better Chains “I approached MWDN for a POC that was delivered ahead of time with very competitive pricing. Following that experience, I have been working with various teams at MWDN for more than two years. Developers and managers have. great technical and interpersonal qualities.” NETANEL MOHONI - CEO, VIDOO “MWDN is one of the best subcontractors we’re working with. The development team are experts, and the management team are flexible and opportunity creators. Definitely the right choice.” Let’s get in touch: [email protected]

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