Android 개발자
3 months ago
Seoul, 대한민국
TO INFINITY
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Development
Android 개발자 (Native + Flutter)
- 제품을 같이 만들 분 Seoul, South Korea Full-time 2026-07-20 About Flinzy Right Now Something unexpected is happening on Flinzy — teenagers are pouring in.
• New-user curve is bending up sharply, with zero marketing
• Retention is staying at levels that don't make sense for an event-based app
• Session time is meaningfully longer than typical camera apps on certain days Honestly? We don't know yet what this product will become. It might be a camera app, a social app, or something we haven't imagined. What we know for sure: the teen users who are already inside deserve an experience we take responsibility for. Right now we're not asking "what should we build" — we're asking "what do these users need next" every single day. Who we're looking for Not someone who implements specs handed down. Someone who can enjoy this kind of ambiguity with us.
• Comfortable moving without a clear spec
• Reads metrics directly and defines what the real problem is
• Ships hypotheses as the smallest possible code, validates with numbers next week
• Thinks from the teen user's POV, willing to talk to users directly
• Flips "how Android usually does it" into "how should Android work for these users"
• Has run, or wants to run, the full plan → design → build → ship → measure loop solo
What you'll do
• Design, build, and optimize the Android (Kotlin) native layer — the core engine that holds no matter where the product goes
• Use Flutter for select screens and experiments, bridge to native via Platform Channel / Pigeon / FFI
• Camera & media pipeline (Camera2 / CameraX, MediaCodec) — foundational regardless of product direction
• Treat Android Vitals (ANR, Crash-free %, Startup, Frozen frames) as product KPIs
• Run hypothesis → experiment → learning cycles on Firebase / GA4 / Crashlytics
• Co-define features that don't exist yet, ship in short cycles, judge by metrics Requirements
• You've personally shipped and operated an Android app on the Play Store (company or personal — what matters is you ran the full plan → build → ship → ops loop yourself)
• Strong Kotlin, deep understanding of Android internals (Lifecycle, Coroutine, Handler/Looper)
• Camera2 or CameraX experience for camera/media features
• Experience reading and acting on metrics for features you built (Firebase / GA4 / Amplitude — any)
• Comfortable taking action when requirements are unclear Nice to have
• Production Flutter experience and native bridging (Platform Channel / Pigeon / FFI)
• Improved Android Vitals (ANR / Crash / Startup) measurably
• Image/video processing, OpenGL ES / Shader / GPU-based camera effects
• PTP / MTP / UVC Webcam / printer SDK or other external device integration
• Solo / side-project apps shipped to the store with real users
• Experience building for or deep understanding of Gen Z / teen users What we promise
• No specs from above. We define the product together.
• Real-time metrics dashboard access — you see the numbers of what you built every day
• Failed experiments are fine. If we learn, we count it as a win.
• We don't know yet where we're going, but we decide the direction together.
• A rare chance to define a product while the users are already inside.
How to Apply
Please send your resume and portfolio to admin@toinfinity.co.kr with the subject line '[Application] Job Title
- Your Name'. Interested in this role? Join To Infinity and help us build the next generation of digital experiences. Apply Now Share
- 제품을 같이 만들 분 Seoul, South Korea Full-time 2026-07-20 About Flinzy Right Now Something unexpected is happening on Flinzy — teenagers are pouring in.
• New-user curve is bending up sharply, with zero marketing
• Retention is staying at levels that don't make sense for an event-based app
• Session time is meaningfully longer than typical camera apps on certain days Honestly? We don't know yet what this product will become. It might be a camera app, a social app, or something we haven't imagined. What we know for sure: the teen users who are already inside deserve an experience we take responsibility for. Right now we're not asking "what should we build" — we're asking "what do these users need next" every single day. Who we're looking for Not someone who implements specs handed down. Someone who can enjoy this kind of ambiguity with us.
• Comfortable moving without a clear spec
• Reads metrics directly and defines what the real problem is
• Ships hypotheses as the smallest possible code, validates with numbers next week
• Thinks from the teen user's POV, willing to talk to users directly
• Flips "how Android usually does it" into "how should Android work for these users"
• Has run, or wants to run, the full plan → design → build → ship → measure loop solo
What you'll do
• Design, build, and optimize the Android (Kotlin) native layer — the core engine that holds no matter where the product goes
• Use Flutter for select screens and experiments, bridge to native via Platform Channel / Pigeon / FFI
• Camera & media pipeline (Camera2 / CameraX, MediaCodec) — foundational regardless of product direction
• Treat Android Vitals (ANR, Crash-free %, Startup, Frozen frames) as product KPIs
• Run hypothesis → experiment → learning cycles on Firebase / GA4 / Crashlytics
• Co-define features that don't exist yet, ship in short cycles, judge by metrics Requirements
• You've personally shipped and operated an Android app on the Play Store (company or personal — what matters is you ran the full plan → build → ship → ops loop yourself)
• Strong Kotlin, deep understanding of Android internals (Lifecycle, Coroutine, Handler/Looper)
• Camera2 or CameraX experience for camera/media features
• Experience reading and acting on metrics for features you built (Firebase / GA4 / Amplitude — any)
• Comfortable taking action when requirements are unclear Nice to have
• Production Flutter experience and native bridging (Platform Channel / Pigeon / FFI)
• Improved Android Vitals (ANR / Crash / Startup) measurably
• Image/video processing, OpenGL ES / Shader / GPU-based camera effects
• PTP / MTP / UVC Webcam / printer SDK or other external device integration
• Solo / side-project apps shipped to the store with real users
• Experience building for or deep understanding of Gen Z / teen users What we promise
• No specs from above. We define the product together.
• Real-time metrics dashboard access — you see the numbers of what you built every day
• Failed experiments are fine. If we learn, we count it as a win.
• We don't know yet where we're going, but we decide the direction together.
• A rare chance to define a product while the users are already inside.
How to Apply
Please send your resume and portfolio to admin@toinfinity.co.kr with the subject line '[Application] Job Title
- Your Name'. Interested in this role? Join To Infinity and help us build the next generation of digital experiences. Apply Now Share