Back End Developer

Job Title: Backend DeveloperLocation: Fully Remote (Work from anywhere in Japan)Employment Type: Full-time (Regular Employment)Salary: up to 12M JPY/yearAbout the Company:This company is a technology startup offering innovative sales enablement SaaS by integrating AI, voice, and cloud technologies. Its core product, built on voice analysis, helps visualize and improve communication challenges in sales and customer success domains. With a strong presence not only in Japan but also in markets such as Indonesia and the United States, the company continues to expand globally. The environment combines technical challenges with rapid growth, providing an exciting field for engineers.Key products include AI-powered IP phone systems and online meeting analysis tools that analyze conversations in real-time. These tools quantify conversation quality and structure, enabling self-improvement and team knowledge sharing.All core features—voice recording, transcription, emotion analysis—are developed in-house and provided as a comprehensive package. The system integrates seamlessly with external tools like CRMs, contributing to improved operational efficiency and decision-making for client companies.Key Responsibilities:Planning, designing, implementing, testing, and operating feature enhancements and new developments for the AI voice analysis service (including telephony, meetings, call recording, and call center functionality)Designing and developing real-time processing features, shared APIs, and data platforms utilizing voice analytics and generative AIArchitecting for high scalability and reliability, while systematically addressing technical debtCollaborating with product managers, designers, and business teams to conceptualize and develop new features with an eye toward multilingual support and international expansionDesigning and operating authentication/authorization systems including SAML, OpenID Connect, and RBAC, as well as integrating seamlessly with other web servicesIdeal Candidate:Shares and aligns with the company’s mission and visionDemonstrates the company’s core values in daily workValues teamwork and collaborates effectively with othersStrong logical thinking and problem-solving skillsHighly motivated toward personal and professional growthRequirements:Must-Have:At least 3 years of hands-on experience in designing and developing web applicationsExperience working in a team-based development environment3 or more years of experience in Python or Go developmentNice-to-Have:Backend development experience for web applications using PythonExperience in building and operating CI/CD environmentsExperience as a team leader or technical leadExperience in the development and operation of SaaS productsExperience in building and managing cloud infrastructurePerks & Benefits:Flextime with no mandatory core hoursFull transportation cost coverage (if visiting office occasionally)Health insuranceWeekends and national holidays offEnd of year and New Year holidaysTrial period: 6 months (standard)We have more positions available—if you're open to new opportunities, don’t hesitate to apply!