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Senior Mobile Engineer, iOS/Android
Location
New York
Posted
33 days ago
Salary
0
Seniority
Senior
Job Description
Senior Mobile Engineer, iOS/Android
Toptal
• Own architecture, delivery, and quality of the consumer app in iOS and Android. • Design and ship the commerce experience, including payments and order flows. • build the computer-vision-based measurement pipeline: AprilTag detection, pose estimation, camera calibration, multi-frame fusion, and the accompanying capture UX. • Build the BLE / Wi-Fi connectivity layer and device control surface, in partnership with firmware. • Set up and maintain the app’s production infrastructure: CI/CD, crash reporting, analytics, feature flags, and release management. • Partner with design on onboarding, error states, and the craft details that define a consumer-grade experience. • Contribute to mobile team growth: technical bar-setting, interviewing, and mentorship as the team scales.
Job Requirements
- Bachelor’s degree is required.
- 5+ years shipping production consumer mobile apps. The candidate should be able to point to at least one publicly available app they built or significantly contributed to.
- Deep expertise in at least one native platform (Swift / SwiftUI or Kotlin / Compose) and working knowledge of the other. Cross‑platform shipping experience preferred.
- Direct experience shipping commerce features: checkout, payments (Stripe, Apple Pay, Google Pay), and related flows.
- Computer vision experience on mobile. The candidate should understand camera calibration, coordinate frames, pose estimation, and homographies — not just at an API‑call level. Hands‑on experience with AprilTag, ArUco, ChArUco, or comparable fiducial / feature‑based tracking work is required. Candidates with equivalent SLAM, photogrammetry, or AR measurement experience should be considered.
- Strong product sensibility and attention to craft. The candidate should care about the experience at the level of motion, copy, and error handling, not only functional correctness.
- Experience with connected hardware: BLE, Wi‑Fi provisioning, OTA firmware updates, Matter / Thread, HomeKit, or Google Home.
- Background in AR, 3D reconstruction, or spatial computing (published work, open source, or shipped product).
- Experience at an early‑stage startup, particularly one shipping both hardware and software.
- Subscription or recurring‑revenue commerce experience.
- Comfort working closely with designers and hardware/firmware engineers.
- Outstanding written and verbal communication skills.
- Ability to work in a fast-paced, rapidly growing company and handle a wide variety of challenges, deadlines, and a diverse array of contacts.
Benefits
- Participation in a 401(k) retirement plan
- Medical, dental, and vision health insurance plans
- Basic life insurance coverage
- Short-term and long-term disability coverage
- Access to flexible spending, dependent care, and health savings accounts
- Access to telehealth virtual doctors
- An employee assistance program
- Flexible paid time off
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🚀 Join the Future of Commerce with Whatnot!Whatnot is the largest livestream shopping platform in North America and Europe to buy, sell, and discover the things you love. Whether it's trading cards, fashion, electronics, or live plants, our sellers are building real businesses across hundreds of categories. We're building live commerce at a scale that's never been done in the West, and there's no playbook to copy. The people here are shaping how an entirely new industry develops. As a remote co-located team, we're inspired by our values and anchored in hubs across the US, UK, Ireland, Poland, Germany, and Australia. We move fast, stay close to our users, and focus on the work that drives the most impact. We're one of the fastest growing marketplaces and were recently named the #1 Best Startup Employer in America by Forbes. Check out the latest Whatnot updates on our news and engineering blogs and join us as we enable anyone to turn their passion into a business and bring people together through commerce. 💻 Role We’re hiring an Android Engineer to join our International Engineering team. The International team is focused on expanding Whatnot beyond the U.S., driving growth across our core markets including the UK, France, Germany, Australia, and others. The team is responsible for elevating the end-to-end international user experience across the entire product. As a core member, you will partner closely with product to solve targeted user problems, unlock new capabilities, and accelerate our global footprint. You’ll design and build mobile experiences and systems that sit at the heart of the seller and buyer experience—combining growth, trust, and scalability. 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