Senior Security Engineer

**About the company:** MeetsMore Chuo-ku, Tokyo We offer two core services: MeetsMore, an online platform that seamlessly handles everything from quote comparison to order placement, and ProOne, an all-in-one SaaS solution tailored for field service industries. **Requirements:** Have built or improved security in a development process: threat modeling, design reviews, and security tools in CI/CD (SAST, DAST, dependency scanning). Experience with cloud infrastructure security: finding and fixing issues in AWS IAM and network configuration, Kubernetes (RBAC, network policies, workload permissions), and CI/CD pipelines (secrets handling, supply chain). Experience implementing and operating automated attack detection and protection using technologies such as WAF, IDS/IPS, runtime application security, or SIEM—including rule tuning, monitoring, alerting, and response to attacks such as SQL injection and XSS. Experience in securing Node.js based application (Python or Go for tooling is fine too, but TypeScript is prefered.) Either be conversational in Japanese or have a desire to do so (we will help). Be located in, or be willing to relocate to, Japan (we will relocate). **Nice to have:** While not specifically required, tell us if you have any of the following. Experience testing or securing LLM-based features: prompt injection, jailbreaks, data leakage, or agent tool permissions. Have led at least one full penetration test from start to finish — scoping, testing, reporting, and confirming fixes — against web applications, mobile apps, and APIs. Have led a full certification audit (e.g., ISO 27001 / ISMS), ideally at a Japanese company: getting the controls in place, collecting evidence, and working directly with auditors. Offensive security certifications (OSCP, OSWE) or bug bounty / CTF experience. **Compensation:** ¥7,000,000 ~ ¥11,000,000 annually. APPLY FOR THIS POSITION DO YOU NEED MORE INFO? ASK A QUESTION About MeetsMore MeetsMore Chuo-ku, Tokyo We offer two core services: MeetsMore, an online platform that seamlessly handles everything from quote comparison to order placement, and ProOne, an all-in-one SaaS solution tailored for field service industries. Key benefits International team Two products at different phases Customer and product oriented culture Read more More jobs like this We'll send you a digest of new English-friendly software developer jobs in Japan. Your email stays private, we don't share or sell it. Apply for this position × I have a favour to ask. When you apply to MeetsMore, please tell them that you heard about the position on TokyoDev . This helps to keep this job board sustainable, so I'd be grateful for your support with this. - Paul, Founder of TokyoDev Continue applying © 2026 Privacy Policy