★Senior Backend Engineer / Contract Execution Domain (Electronic Contract Service)

• Business Level Japanese Required (N2 Level)

◆ Fully Remote Work

◆ Listed Company

◆ In-house Products/Services

◆ Great Welfare

◆ Annual salary:8 million yen - 16 million yen

【About the company】

The company's philosophy is to create a society where people all over the world can freely utilize "wisdom to live better = intellectual information" and to create a society where people can live happily.

It provides a wide range of services, including different portal sites and the Web-based cloud contract service.

【 Job Description】

【About the Service】

The service is a Contract Management Platform that enables contracts to be seamlessly and entirely digitized, from execution to management and AI review. It allows for smooth and secure contract execution through electronic signatures and time stamps compliant with the Electronic Signature Act. In 2023, it became the first general-purpose electronic contract service in Japan to launch a 'My Number Card Signature' feature. Furthermore, by actively adopting AI technology, such as AI contract management and AI review support services, it achieves overall time reduction in contract operations. It is the No. 1 service in the electronic contract market, widely adopted by companies and local governments.*

*Source: Fuji Chimera Research Institute, Inc., "Software Business New Market 2023 Edition" (Electronic Contract Tool FY2022 results), Market Share.

【Introduction to the Recruiting Department】

・Product Engineering Department (Contract Execution Domain)

This development team is involved in feature development for contract execution duties, particularly the functions related to the signing parties within the company's Contract Management Platform.

They drive product development—including new product development, new feature development, and feature improvements—by collaborating with the business division.

It is anticipated that the assigned individual will have the opportunity to engage in a wide range of activities, taking into account their aspirations and business direction.

【Recruitment Background】

The service is Japan's largest electronic contract platform (with over 2.5 million companies implemented), enabling the entire process from contract execution to management to be completed online. It is widely used across a range of areas, from major corporations and startups to local governments.

However, the company's ambition is not simply "digitizing contracts." A contract is only the "beginning" of a transaction. What truly needs to be digitized is the entire transaction process, including the contract itself—meaning the entire flow from corporate agreement formation to task execution, fulfillment confirmation, invoicing, and payment.

The service is now advancing its evolution into a multi-product system, shifting from a "single-feature SaaS to a platform for enterprise transactions" that links with companies' core systems. This involves not just replacing paper and seals with digital alternatives but fundamentally changing the nature of transactions using technology.

The company views the realization of Transaction DX (Digital Transformation) in Japan, where the working-age population is declining, as a social mission. To execute this ambitious plan, there is significant work to be done, including building common foundations, constructing new products, and resolving technical debt through the domain separation of existing products.

The company is recruiting expert personnel to join them in realizing this Transaction DX.

【Your Role】

You will be responsible for backend development within the Contract Management Platform.

You will tackle technical challenges associated with business growth, in addition to development duties such as various product/feature development related to electronic contracts and transaction processes, architectural improvement, and security enhancement. Furthermore, it is expected that you will gain a complete understanding of the service's overall architecture and then specialize in a particular domain, where you will technically lead the team.

■Responsibilities

・Service requirements definition, design, implementation, and leadership.

・Project promotion to ensure smooth releases.

・Refactoring.

・Code review.

・Support for Customer Support.

・Service improvement and operation.

・Improvement and optimization of business processes.

・Resolution of technical challenges, long-term technical selection, and formulation/execution of technical strategy.

・Talent development (promoting member growth from a technical perspective).

■Development Structure and Methodology

Product development is carried out by Scrum teams composed of members spanning various functions, including engineers, designers, and PdMs (Product Managers).

Each team is organized with about 10 members and proceeds according to its respective development theme, such as feature development or engineering improvement (backend/frontend).

【Development Environment】

Backend: Go/Revel/gorilla/gorm

Frontend:

Infrastructure: AWS (ECS, RDS, Lambda, S3, Redis, SES, SNS, SQS, ELB, etc.)

Database/Data Store: Aurora

Project Management: JIRA

Source Code Management: GitHub / GitLab

CI/CD: GitHub Actions / GitLab CI / AWS CodeDeploy

Information Sharing: Slack/Google

Development AI: Cursor/ClaudeCode/GitHub Copilot, etc.

■ Work Environment

MacBook Pro

Preferred Editor (paid options acceptable)

【Position Highlights】

・The ability to be involved in the development of a rapidly growing product that is transitioning from a single SaaS product into a piece of social infrastructure.

・Acquiring development experience under high security standards, as the product was the first electronic contract service to be registered with ISMAP (Information System Security Management and Assessment Program for government information systems).

・The opportunity to engage in new product launches and large-scale feature development within a stable business foundation.

・The opportunity to become a core member during a phase of active new product launches and large-scale feature development.

【 Requirements】

【Required】

Experience in business system development (5+ years)

Experience in backend development using modern technologies (5+ years)

Experience working on a single product for over one year

Experience developing in-house services (3+ years)

Experience leading a product launch from scratch

Experience in roles such as development team leader or Tech Lead

Team member development

Project management experience

Experience in technology selection and architecture design

【Preferred】

Experience as an infrastructure engineer in AWS environments

Experience implementing and operating products requiring high-level security

Experience as an OSS committer

Experience as a Scrum Master and Agile Coach

【Ideal Applicants】

Flexible enough to move beyond fixed roles for the team's benefit

Demonstrates a desire to learn and intellectual curiosity about new things

Takes initiative to improve services

【Welfare】

■Housing Allowance: An allowance of up to ¥30,000 is provided to employees whose home is located less than 2km (straight-line distance) from the company office.

■Employee Stock Ownership Plan

■Defined Contribution (DC) Pension Plan

■Club Activity Subsidy System: Various clubs are organized internally to deepen interaction among employees. The company provides a partial subsidy for activity expenses when employees belong to a circle and actively participate.

■Regular Social Gatherings: To foster employee interaction, the company hosts gatherings such as a Beer Bash (held internally on a Friday once a month) and General Employee Meetings (held at an external venue with all employees present).

■Shuffle Lunch: To deepen employee interaction, once a month, the company subsidizes lunch for groups of 4-5 randomly selected employees. The company provides a subsidy of ¥1,500 per person for the lunch expense.

■Resort Support System: A system allowing employees to stay at a private, membership-based resort hotel, with access to diverse facilities such as hot springs, sports, and restaurants.

■Internal Commendation System: A system used during General Employee Meetings to recognize employees who embody excellence and serve as role models (e.g., MVP awards).

■Real Estate Brokerage Fee Discount: Employees relocating receive a discount on brokerage fees if they use the real estate agency with which the company has a corporate contract.

■Babysitter Expense Subsidy: Expenses are subsidized for employees who need to use a babysitter to attend internal events, starting with the regular social gatherings.

■Book Purchase System: The company covers the cost of purchasing books, provided certain conditions are met.

■Side Jobs (Fukugyo) Allowed: Side jobs are permitted upon approval.

■PC Provision: The standard PC provided is a MacBook Air. (MacBook Pro is provided to creative roles such as engineers and designers.)