• Full-time

Publication date: 2026.11.04

【Lab】Lead Class Engineer

  • System Engineers / Infrastructure Engineers / Web Engineers / Game Developers
  • Full remote work
  • Salary: JPY 5,000,000 - 14,000,000
【ラボ】リードクラスエンジニア
職種Position System Engineers / Infrastructure Engineers / Web Engineers / Game Developers
会社概要Company profile Established in January 2009. Headquartered in Ebisu, Tokyo, and opened the Kyushu Branch in Kitakyushu City, Fukuoka Prefecture, in November 2024. Listed on the TSE Growth Market in March 2024. Number of employees: 458 on a consolidated basis and 373 on a non-consolidated basis (as of April 2026).

■Business Description
Operates an in-house system development support business specializing in leading large companies. Engages directly with customers' decision-makers and supports not only system development but also transformation of business operations itself under the banner of "0th-Stage DX," handling projects across a wide range of fields including entertainment, securities, SaaS, and real estate, mainly through direct contracts and upstream processes. Also provides support for business efficiency improvement using Microsoft 365 and Power Platform, utilization of generative AI, and SaaS implementation.

■Features
Officially launched "WhiteBox," an open platform for system development companies, in January 2021. The group includes WhiteBox Inc., A.K. Plus Co., Ltd., and PEOPLE.com Co., Ltd.

■Headquarters Address
Ebisu Garden Place Tower 15F, 4-20-3 Ebisu, Shibuya-ku, Tokyo, Japan
仕事内容Job description ## **"Unleashing this country's potential with AI and Humanity."**
Joho Senryaku Technology is a "DX co-creation partner" that breaks the multi-layer subcontracting structure of the IT industry and works alongside major leading companies from the most upstream stage of their business at "zero distance."
Unlike conventional SI / SES, we are built around our proprietary "0th DX" approach and provide a wide range of services in one seamless flow, from upstream consulting to next-generation AI implementation.
In 2024, we listed on the Tokyo Stock Exchange Growth Market.
By combining "AI technology," where we are No. 1 in Japan at AWS hackathons, with "Humanity," which draws out tacit knowledge from the field, we unleash the potential of Japan's leading large companies at the fastest possible pace.
The main players are people. We are a group that continuously creates value beyond expectations by skillfully wielding technology.

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Recruiting Lead Engineers for the 0th Lab!
We will provide in-house development support through direct contracts with clients listed on the TSE Prime Market.
The lead class engineer positions we are currently recruiting for are as follows.
・Small-scale web application development project "Agile Odd-Jobs Team"
We are seeking someone who can work as a full-stack engineer and take on a PdM-like role that goes beyond technical boundaries.
・Large-scale web application development project "Engineer Team Navigator"
We are seeking someone who can lead teams and services through technology and handle technology selection and resolution of technical challenges.
・Infrastructure project "Super Strong Support Behind the Scenes"
As an infrastructure specialist, we are seeking a solution architect who can address not only infrastructure but also challenges across the entire service.
```
## ■What is the 0th Lab
We are a professional group that combines trend technologies with agile development.
Experts in diverse fields, including web apps, native apps, and generative AI, are on staff, and we lead development with the optimal team for each project's needs.
While closely collaborating with clients, we advance flexible agile development and respond smoothly to specification changes.
Through short sprints, we accumulate results and improve productivity with every project.
The Lab upholds the principle of "fast, small, and exactly as imagined," and provides an environment where you can fully demonstrate your technical skills.
For engineers who want to take on trend technologies and improve their own skills, this is an environment where you can grow like nowhere else!
## ■Work Environment
Because our projects are taken in-house, we work fully remote or at the head office.
We provide a virtual office so that you can work on tasks while communicating smoothly with your team.
In addition, we hold 1on1 meetings several times a month, so even in fully remote work, a sense of isolation is unlikely.
Gaining new experience is often difficult without prior experience, but since the 0th Lab involves projects as a "team," you can take on new challenges with support from your team.
## 【Job Description】
As a company listed on the TSE Growth Market, you will play an active role as a lead engineer promoting "0th DX" for enterprise companies (mainly TSE Prime-listed companies). This is not simply a contract for implementation work; we expect you to take responsibility for everything from "articulating business requirements" to "optimal architecture design and implementation" alongside the client, and to lead technical decision-making.
## 【Job Details】
* **Technical Lead and Design**: Present the technical direction (vision) for projects, and lead advanced implementation using statically typed languages as well as quality control through detailed design.
* **Promotion of Modern Development**: Lead PoC and new service launches using the latest technologies, such as utilizing generative AI (LLMs, etc.) and migrating to cloud-native architectures.
* **Team Management (Technical)**: Maximize the output of the entire team through establishing coding standards, code reviews, and standardizing development processes.
* **Client Negotiation and Proposals**: Analyze clients' business challenges from a technical perspective, and propose feasible solutions and turn them into implementation.
* **Developing Junior Engineers**: As a technical leader, proactively provide education and mentoring to junior engineers and contribute to raising the capabilities of the entire organization.
## 【Technology Stack and Tools】
* **Languages**: Java, PHP, Go, Ruby, Python, JavaScript, TypeScript, Kotlin, Swift, SQL, HTML/CSS, etc.
* **Frameworks**: Spring Boot, Laravel, Vue.js, React.js, Angular, Node.js, echo, etc.
* **Cloud**: AWS, Azure, GCP
* **Infrastructure**: Docker, Kubernetes, Terraform, Ansible, Jenkins, GitLab CI, GitHub Actions, etc.
* **Databases**: MySQL, PostgreSQL, Aurora, Oracle, SQL Server, BigQuery, DynamoDB, etc.
* **Tools**: Git, GitLab, GitHub, Slack, Jira, Confluence, Backlog, Looker, Figma, etc.
* **Others**: Generative AI (Azure OpenAI, Amazon Bedrock, Google Gemini, GitHub Copilot), low-code (Pega, Outsystems), BPM (Bonita), etc.
## 【Career Path】
At IST, you can pursue a variety of careers according to individual preferences.
1. Specialist / IT Architect Path: Master a specific technology (cloud, languages, AI, etc.) and lead teams and clients through technology.
2. Project Management / Client Proposal Path: Step up to PL and PM roles and manage the overall project and client relationships.
3. Organizational Management Path: Contribute to member development and organizational operations as a team leader or manager.
In addition to the above, in this position you can broaden your technical range (become full-stack) and increase your market value by gaining experience across the diverse projects within the Lab (PoC, new development, growth). In the future, we expect you to take on a role leading service development as a core member of the team.
## 【Appeal of the Position】
* **Embodying "0th DX"**: You will have the strong sense of achievement of engaging directly with clients' decision-makers and co-creating "truly valuable systems."
* **Challenging Modern Technology**: With generative AI projects and more, there are abundant opportunities to constantly catch up on new technologies and apply them in real projects.
* **Wide Technical Scope**: Depending on your preferences, you can work across frontend, backend, and infrastructure, aiming to become a full-stack engineer. In particular, for PoC and new launch projects, you have the discretion to be involved from technology selection.
* **Career Flexibility**: With a wide variety of projects, it is easy to choose projects and roles that match your career plan. Relatively flexible transfers within the team are also possible.
* **Sense of Contributing to Clients**: This position makes it easy to gain a sense of contributing to clients' business growth through technology by interacting with them directly.
* **Environment for Growth**: The team has many members with multiple skills who catch up quickly, and there is a culture of helping and learning from one another. Your own growth leads directly to contributions to the team and clients.
応募資格Requirement Positions have different required skills depending on the role.
## Small-scale Web App Development Project
* Hands-on experience in web application development (guideline: 5+ years)
## Large-scale Web App Development Project
* Hands-on experience in web application development (guideline: 6+ years)
* Deep understanding and implementation experience with statically typed languages such as Java, Go
* Experience creating detailed design documents, or equivalent design skills
## Large-scale Web App Development Project: Cloud Architect
* 3+ years of hands-on experience as an infrastructure engineer
* Design and construction experience using AWS, Azure, or Google Cloud (years of experience not required; willingness to take on challenges valued)
日本語力Japanese level Fluent
雇用形態Employment type Full-time
勤務エリアLocation Full remote work
勤務時間Working hours —
想定年収Salary JPY 5,000,000 - 14,000,000
条件・待遇Condition [Salary]
Expected annual salary: 5,000,000 yen to 14,000,000 yen
### [Expected annual salary]
* 5,000,000 yen to 14,000,000 yen
[Work location]
※ Remote work is assumed in principle.
* Immediately after hiring: Head office, and the location(s) where remote work is performed
* Scope of change: No change
* Head office: 15F Ebisu Garden Place Tower, 4-20-3 Ebisu, Shibuya-ku, Tokyo
**Access: "Ebisu Station"**
* Tokyo Metro Hibiya Line, Exit 1, about a 7-minute walk
* JR Yamanote Line, East Exit, about a 5-minute walk
選考についてProcess
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