ВАКАНСІЯ ДЛЯ УКРАЇНСЬКИХ IT ФАХІВЦІВ
Senior Full-Stack Developer - Mobile Media-Tech
• React Native, Mobile Apps
• Proven experience in building streaming services is must-have.
📍 EU, Ukraine
🌍 Remote
💼 Permanent
💲 Compensation is negotiable
🗣 English C1
Company
Vertical Television
Position
Senior Full-Stack Developer
Project
Building the future of Vertical Television by combining cinematic storytelling with interactive, vertical-first technology. The role focuses on a high-scale mobile app and operational web platforms, scalable application design, and performance optimization.
Tech Stack
• React Native
• React
• JavaScript
• HLS
• Streaming
Key Responsibilities
• Architect, plan, and lead the development of the mobile app built with React Native and web platforms using React, ensuring a holistic and scalable system design.
• Own the core viewing experience featuring an infinite vertical video feed with instant time-to-first-frame, video preload/prefetch, player-instance recycling, and disciplined memory management across multiple concurrent video players.
• Serve as the technical expert and mentor for mid-level developers by providing guidance, conducting code reviews, and elevating engineering standards within the team.
• Adhere to coding standards, best practices, and promote a reusability-first mindset to maintain a clean, maintainable, and highly scalable codebase.
• Address complex performance challenges including app state management, native bridging, and video rendering optimizations such as player tuning, reducing frame drops, minimizing jank on scroll, and improving cold-start times.
• Design and integrate in-app purchases, subscriptions, deep links, attribution, and user-behavior tracking end-to-end, including client SDK implementation and server-side receipt validation.
• Work closely with Product, Design, and Backend engineering teams to deliver fast iterations of complex features in a dynamic startup environment.
Required Skills
• 8+ years of experience with React Native and React on mobile platforms.
• Proven experience in building streaming services.
• Experience in video streaming technologies (HLS, DASH or similar).
• Experience in native mobile development (Swift, Kotlin) for performance optimization and seamless playback.
• Experience in in-app monetization, authentication, and analytics integration.
• Experience in fast-paced media-tech startups, driving technical standards, mentorship, and cross-functional collaboration.
Nice to Have
• Solution Architecture Design.
• Apache Spark Streaming.
• TypeScript.
• Swift.
• Kotlin.
• Objective-C.
• Dash.
• ExoPlayer.
• Bitmovin.
• Mux.
• AWS CloudFront.
• Fastly.
• AWS Cognito.
• Crashlytics.
• Auth0.
• StoreKit.
• Billing.
• Universal apps.
• MongoDB.
• AWS.
• GCP.
• Amplitude.
• Mixpanel.
• Sentry.
• Fastlane.
• Detox.
• Ffmpeg.
• AWS IVS.
• AVPlayer.
• Experience with mobile CI/CD and release operations.
• Background in high-growth startups or mobile entertainment products, with familiarity in vertical/short-form feed products similar to TikTok, Reels, or Shorts.
• Understanding of ad-tech and SSAI (AdMob, Google IMA) and subscription monetization modeling.
• Knowledge of DRM technologies (Widevine, FairPlay), offline downloads, and transcoding pipelines (Mux, AWS MediaConvert, AWS IVS).
Contract
• Permanent
Format
• Remote (EU, Ukraine)
Schedule
• Flexible schedule
• Long-term engagement
• Remote-first
Salary Range
💲 Compensation is negotiable
How to Apply
Agency: Upstaff
📩
https://t.me/mariiaemll
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