Jobs at X-FLOW

Design and build RESTful APIs with PHP/Laravel and frontend apps in TypeScript/React. Integrate external services, optimize performance, design databases, implement observability, write tests and conduct code reviews, and contribute to architectural decisions.

Develop and adapt multi-tap playable ads and interactive end cards using HTML5/JS frameworks, optimize graphic and audio assets, export creatives for ad networks, perform QA, and troubleshoot delivery issues.

Create high-quality 2D illustrations and character stories for the Happy Color app across varied styles; produce character concepts with strong anatomy, composition, color, light, form, and perspective.

The Support Specialist will handle user requests, coordinate with internal and outsourcing teams, maintain the knowledge base, and ensure quality user communication across different platforms.

The UA Manager will lead user acquisition campaigns across various channels, analyze performance, and drive growth strategies in mobile game development.

Design, develop and maintain mobile, web (E2E/UI) and API test frameworks; increase coverage for critical flows; integrate tests into CI/CD (PR/nightly/regression), manage flaky tests/quarantines, run test code reviews, and collaborate with development and QA teams to improve testability and developer experience.

Manage daily content release process for Happy Color: prepare and maintain content in internal CMS, ensure accurate on-time releases, improve operations and documentation, collaborate with Art, Development, Support and Social teams, and participate in content planning and production discussions.

Design and implement a petabyte-scale analytical system using Java and cloud platforms. Own full lifecycle tasks: architecture, development, performance optimization, debugging, and documentation while balancing performance and complexity.

Lead ad monetization strategy for Happy Color: optimize ad placements, run A/B tests, grow ad revenue, manage ad network partnerships, collaborate with product/marketing/dev teams, and monitor market best practices to improve monetization performance.

Develop and maintain high-performance Flutter apps for Happy Color and new projects. Implement adaptive UIs, pixel-perfect animations, modular architectures, performance tuning, tests, and integrate Firebase, analytics, IAPs, and push notifications while collaborating with designers and backend engineers.