We’re supporting a Tokyo-based deep-tech startup building a graph + neuro-symbolic reasoning engine for enterprise, safety-critical domains — on-prem, auditable, controlled.
What you’ll do:
- Contribute to the development of a distributed reasoning system.
- Design, build, and maintain core backend services, libraries, and system components.
- Take ownership of key engineering artifacts, ensuring their reliability, scalability, and performance.
- Work on systems that understand, process, and reason about programming languages.
- Collaborate closely with cross-functional teams on architecture, implementation, and product decisions.
- Participate in building infrastructure for code processing, automated reasoning, and AI-driven engineering workflows.
Requirements:
- 5+ years of experience in software engineering. At least 2 years of experience with Rust.
- Strong background in backend development and scalable system design.
- Experience with distributed systems, AI/ML infrastructure, scalable web systems, or similar complex technical domains.
- Solid understanding of software engineering fundamentals, system architecture, and production-grade development practices.
- Degree in Computer Science, Mathematics, Engineering, or a related field.
- Ability to take ownership of complex technical components and deliver high-quality results.
- Strong communication skills and ability to work effectively in cross-functional teams.
- English proficiency at C1 level or higher.
- Proactive mindset, curiosity about AI advancements, and commitment to continuous learning.
Nice to Have:
- Experience working in startups or fast-paced product environments.
- Experience with automated reasoning, code intelligence, developer tools, or AI systems.
- Background in AAA game development or other highly complex software environments.
- Experience with C++ or Python is a strong plus.
Conditions:
- Target salary range is 16-22M JPY (~$105k–145k) gross per year.
- High autonomy: Colleagues trust independent, professional teammates but collaboration is key.
- Low Bureaucracy. Results > process, though metrics and documentation still matter.
- Support for English and Japanese language training.
- Compensation of overseas health insurance and additional medical costs. Full Japanese social security: Health, employment insurance, maternity/childcare leave. Annual health checkup
- Paid Holiday - up to 25 days per year.
- Full Visa Sponsorship.
- Monthly commute expense.
Send your CV on Telegram: @karinakava