Fullstack Engineer

    Salary: ¥6M ~ ¥10M /yr

    About Mantra

    Mantra is a technology company building products that empower people through entertainment and education.

    Our key services include:

    • MANTRA ENGINE: A machine learning–powered recommendation and personalization platform, optimizing manga and digital content distribution.
    • LANGAKU: A unique language learning app that leverages manga to help users learn English and other languages through immersive experiences.

    As an Engineering Manager, you will lead a team that directly contributes to these services—designing and operating the systems behind them, building features based on user insights, and ensuring engineering excellence in both product and process.

    Primary Responsibilities

    • Designing, developing, and operating our web services (supporting products such as LANGAKU and internal platforms like MANTRA ENGINE).
    • Managing an engineering team of about five members, fostering growth and collaboration.
    • Building and managing development roadmaps aligned with business strategies and goals.
    • Improving development processes and eliminating technical debt to enhance productivity.
    • Extracting user issues and considering feature specifications based on user interviews and data analysis.
    • Leading projects where development is the primary focus (e.g., client discussions to design APIs).

    Basic Qualifications

    • Proven experience (3+ years) in leading a team of engineers.
    • Experience in designing backend APIs and database schemas for commercial services at scale.
    • Hands-on experience in implementing web services from frontend to backend.
    • Involvement in team development from the service specification stage.
    • Japanese language skill (JLPT N2+).

    Preferred Qualifications

    • Experience as an Engineering Manager or Technical Lead.
    • Experience in designing, operating, and constructing backend and infrastructure for large-scale services.
    • Experience in promoting agile development processes such as Scrum.

    The Ideal Candidate

    • Someone accustomed to continuous learning.
    • Able to approach problems by formulating and then verifying hypotheses.
    • Enjoys communicating with people from different fields and backgrounds.
    • Able to take ownership and handle working independently.
    • Strong interest in Mantra’s focus areas (manga, language, machine learning).

    Benefits

    • Flexible working style, including remote work options.
    • Relocation and visa sponsorship support for candidates moving to Japan.
    • Opportunity to lead an international, cross-functional team building products at the intersection of entertainment, education, and AI.

    Selection Process

    • Document screening (resume, detailed career and job history, portfolio)
    • ~3 Interviews
    • Final meeting to discuss terms of employment and compensation

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