Mobile App Engineer
Applications: candidates may apply from outside Japan. Visa sponsorship: available. Japanese: Business level. English: Not required. Japan Dev tags: Engineering, Mobile - Other, Flutter, Mobile, Kotlin, Github, Swift, Firebase, Figma.
What You’ll Do
As a Mobile app engineer, you’ll play a key role in leading the development and improvement of SAMANSA’s platform.
You’ll work closely with our cross-functional team to design, build, and optimize features that enhance the user experience and accelerate our product growth.
Responsibilities:
- Lead the design, development, and operation of our short film streaming platform
- Build and maintain features of mobile app
- Analyze user data to identify opportunities and implement product improvements
- Contribute to technical strategy and participate in key engineering decisions
- Mentor and support other engineers while improving development processes
- Drive continuous delivery and rapid iteration through efficient feedback cycles
Our Tech Stack
- Backend: Ruby on Rails
- Frontend: React (Next.js) / HTML / CSS
- Mobile: Flutter
- Infrastructure: AWS (GCP experience is a plus)
- Data Analysis: BigQuery, statistical analysis tools
- Version Control: GitHub
- Tools: Slack / Notion /Datadog
Team Structure (as of May 2026)
- Fullstuck: 2 engineers (Also handle infrastructure)
- Backend: 3 engineers (1 also handle infrastructure)
- Frontend: 1 engineer (1 part time member)
- Mobile: 4 engineers (3 part time members)
- Others: 1 Product Manager, 1 QA tester, 1 UI/UX Designer
You’ll be joining a young, collaborative, and ambitious team that values both technical excellence and creative freedom.
Who We’re Looking For
We’re seeking an engineer who doesn’t just “build what’s requested,” but takes initiative — someone who’s excited to propose improvements, explore new technologies, and contribute strategically to our product’s evolution.
If you’re passionate about both technology and cinema, this is a unique opportunity to make an impact on how films reach the world.
Why SAMANSA
- Work on a product loved by thousands of film enthusiasts
- Collaborate with a diverse and creative team
- Have a strong voice in shaping our technology and roadmap
- Be part of a fast-growing startup aiming for global reach