Senior iOS Developer (f/m/d)
- Hamburg
- adjoe
- Rewarded Solutions
- Full time
adjoe builds the technologies behind mobile apps growth and monetization. With our core product Playtime Arcade, we’ve become the global leader in rewarded advertising, an ad unit built on a simple premise: users earn real in-app rewards for engaging with new apps. The result is one of the most effective value exchanges in adtech, connecting advertisers and publishers with over 770 million users annually
Creating solutions that run on 13% of the world’s smartphones
The Mobile Integrations team builds the core technology that turns advertising from an interruption into a rewarded experience for 770 million users. We own the robust, lightweight,integration layer between our ad engine and the global mobile ecosystem, ensuring our technology operates with minimal overhead while reaching a massive portion of the smartphone market.
On the client side,our technology performs smoothly across 20 million daily SDK initializations. We build native Swift and Kotlin SDKs optimized for ms initialization and minimal binary overhead, with Unity, Flutter, and React Native wrappers that provide a unified API across the entire mobile ecosystem. Behind the scenes, a high-throughput Go and DynamoDB architecture handles the real-time state synchronization of millions of concurrent sessions. When your code runs on nearly one out of every seven smartphones on Earth, every millisecond of execution and every byte of memory counts.
Your Mission & Who We Are Looking For:
Swift expert with SDK experience. You have 5+ years as an iOS developer with a CS degree or equivalent, and have built and maintained production SDKs before. At adjoe, you’ll be developing native iOS SDKs that run on millions of iPhones daily, owning feature development and iOS specification implementation end-to-end.
Deep iOS platform knowledge. You have a thorough understanding of iOS; SwiftUI, modern concurrency, clean architecture principles, and service lifecycles, not just the happy path, but the edge cases that only surface at scale across hundreds of millions of monthly active users.
Quality is part of your workflow. You work closely with QA to develop and maintain automated testing strategies through CI pipelines. You don’t hand off to QA, you build testability from the start.
Stays current with the iOS ecosystem. You follow iOS framework evolution closely and actively bring new capabilities into the SDK when they’re relevant. You know what changed in the latest iOS release and have an opinion on whether it matters.
Cross-platform exposure is a plus. Experience with Kotlin, React Native, Flutter, or Unity helps when working across a mobile team that spans the full ecosystem. AdTech industry background is a strong plus.
🌎 We welcome applications from talent worldwide and provide relocation support to Hamburg, Germany for those ready to join our team.
What’s in It for You?
At adjoe, you’re not here to just close JIRA tickets, you’re helping build the infrastructure behind one of the most impactful platforms in adtech. The systems you work on will reach hundreds of millions of users and power billions of decisions every day.
Go Big. Own projects with impact on 770M users and push adtech boundaries.
Move Fast. Ship solutions multiple times a day, learn from results, and keep momentum.
Be Direct. Solve problems openly and collaborate across teams.
Thrive Together. Grow with a diverse, global team of people from over 40 different countries that learn from each other.
Have Fun. Celebrate wins, enjoy daily victories, and bring your energy.
We welcome applications from people who will contribute to the diversity of our company.
Tips & Tricks to Nail Your Interviews!
Skip cover letters
Check your equipment
Do some research
Prepare an elevator pitch
Structure your answers
Let your personality shine
Come with your questions
Don’t be afraid of rescheduling
Recruiting FAQs
We aim to make our recruiting process as fast and efficient as possible, but the duration can vary depending on the role you are applying for. Usually we are really fast, though (less than 4 weeks).
Yes, if you see multiple roles open that match your skill set, you can apply for them simultaneously. Our Talent Acquisition team will review your application and contact you about the role that best seems to match your skills.
Yes, if you see multiple roles that match your skill set, you can apply for them simultaneously. Our Talent Acquisition team will review your application and contact you about the role that best matches your skills.
Great! Please allow a few days for our team to review your application. We will contact you with the next steps as soon as possible.
We’ll never ask you for money, fees, or sensitive information (like bank details, tax forms, or credit card numbers) during the hiring process.
If anything feels off, you can always double-check by reaching out to our Talent Acquisition team at ta@applike-group.com.
Once you’ve signed your contract, our HR team may request personal details, but only from our official email: hr@applike-group.com.
No, we do provide full visa and relocation support.
We do! You can find more information about our relocation support and the succesful relocation of our colleagues here on this website.
No problem! Our visa and relocation support does also include your partner or kids. (Please be aware that legal marriage is often times a requirement to obtain a partner-visa).
If you prefer 100% remote companies, applike is not the right place for you because we strongly believe in face-to-face collaboration. However, we did implement a hybrid working model where we are in the office at least three days a week (Monday, Tuesday, and Thursday) and can work remotely the remaining two days. Additionally, you get three whole weeks per year to work fully remotely if you want.
Our hybrid working approach involves being in the office at least three days a week (Monday, Tuesday, and Thursday) and the option to work remotely the remaining two days. Flexible working hours mean that we work Monday-Friday, but do not have fixed working hours. Just make sure to adapt to the rhythm of your team.
The headquarters of the applike group and all its subsidiaries are located in Hamburg, Germany. We do have offices in the US and APAC.
Well next to the fact that you are able to see and collaborate with your colleagues face-to-face, we have a super modern office that leave no wishes open: from Drinks & Snack, areas to work away from your desk to a fully equiped gym.
Yes, you can!
Couldn’t find the perfect job offer?
Nevermind! We are always interested to get in touch with new talents.