Senior Security Engineer

Tokyo
Partial Remote
Full-time
October 9, 2026

¥7M ~ ¥11M /yr

Apply from Anywhere

Relocation to Japan

Japanese: Not Required

Senior or above

About the position

As a senior security engineer at MeetsMore, you'll join the SRE team and cover four areas: penetration testing of our own products, application security in the development process, AI security—covering both our LLM-powered features and our AI-assisted development process—and the technical side of security compliance: implementing controls, automating evidence collection, and answering the engineering questions in audits and customer security checks.

You will be building the security team and leading the security effort across the company. You'll work alongside an SRE / DevOps team that automates as much as possible. Communication is mostly in English and occasionally in Japanese, with support from translation tools.

Our Tech Stack

Not exhaustive, but the most important are:

TypeScript everywhere.
NodeJS.
React.
MongoDB.
AWS (Specifically ECS, CloudFront, S3, SQS, Lambda)
Vercel.
Redis.

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 preferred.)
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 haves

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.

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About MeetsMore

MeetsMore is a local services marketplace that connects people with professionals in the service industry.

MeetsMore’s mission is to increase Japan’s GDP and create a society where people can believe in a better tomorrow.

To achieve this mission, MeetsMore offers two main services: the first is MeetsMore, an online platform that integrates all the necessary procedures in the service industry, from quote comparison to order placement. And the second is ProOne, an all-in-one SaaS solution for field service industries.

MeetsMore is one of Japan’s top platforms for comparing quotes and ordering services online. It allows users to compare quotes from up to five professionals, all online and in a minute or less. The platform allows users to request quotes, compare prices, chat with service providers and complete their payments all inside the app. It’s a one-stop shop for everyday service needs.

The platform offers services from all over Japan, with over 600 categories. You can find wedding photographers, tax accountants, A/C installation companies, gardeners and so much more. There are more than 77,000 registered service providers on the MeetsMore platform.

June 2024 marked the 7th year anniversary of the MeetsMore service launch. In this year alone, MeetsMore surpassed a cumulative total of 5 millions service requests, which is a 160% increase.

ProOne is an all-in-one business management software tool. It helps teams with renovations, short-term construction and other facility-related work. Their software helps field services businesses become more efficient and boost sales. It also assists with increasing customer satisfaction, and reducing employee overtime by providing a suite of tools for customer management, quote creation, project documentation, and financial management.

ProOne helps businesses streamline operations so they can focus more on their work in the field. According to internal research, the ProOne software helps businesses reduce their administrative tasks by 30% and increase revenue by 20%!

MeetsMore’s engineering team is highly international. They have engineers from over 12 countries, which contributes to a multifaceted culture. And while the majority of engineers are based in Japan, they also have a few members working overseas from Europe.

The engineering team is also highly experienced. In fact, MeetsMore has over 5 team members with CTO experience. With engineers from some of Japan’s leading companies, they’ve created an environment where all members can grow together.

MeetsMore’s engineers get to work on interesting technical challenges. They know that sometimes you need to get something out as quickly as possible, but they also take time for thinking about and solving deeper problems.

For example, the team built a custom UI in their platform for allowing professionals to select which areas to accept work orders from. This was a challenge for the team, but they found a solution by building a pipeline that transformed public data into a performant UI (while maintaining a high degree of fidelity).

The MeetsMore platform has already grown a lot, so the team is currently focused on scaling. ProOne launched more recently, so the team is working to evolve the product as quickly as possible. That means that working at MeetsMore will give you chances to experience building products in different phases.