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Job details

Senior Engineer

​Summary

You will play a central role in the requirements definition and high-level design phases of enterprise business system projects built on cloud platforms such as AWS, GCP, and Azure for clients across a variety of industries, including e-commerce, warehouse management, and insurance.


Rather than writing code yourself, your primary focus will be on defining what to build and how to build it, communicating that vision to stakeholders, and driving alignment across teams.


Key Responsibilities


・Gather, analyze, and structure business requirements through interviews with clients and internal stakeholders, and model end-to-end business processes and workflows

・Lead system architecture design across application, database, and network layers

・Define application specifications, including APIs, batch processes, integrations, and user interfaces

・Evaluate, design, and propose cloud-native architectures leveraging services such as AWS Lambda, RDS, and S3

・Define non-functional requirements, including performance, availability, security, scalability, and maintainability, and translate them into architectural and design decisions

・Create and review detailed design documentation, including functional specifications, technical designs, interface specifications, and operational procedures

・Communicate design intent and technical specifications to development and operations teams, and facilitate alignment and consensus among business and technical stakeholders

人材要件(Must Have Experience)

​人材要件(Nice to Have)

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Personnel Requirements (Must Have)

・5+ years of experience as a software/systems engineer

・Proven experience producing basic and detailed design documents grounded in business requirements

・Hands-on experience with REST API design and both logical and physical database design

・Ability to incorporate non-functional requirements (availability, operability, security) into system design

・Practical experience conducting business requirements interviews and negotiating specifications with stakeholders

・Experience designing enterprise systems on at least one major cloud platform (AWS, GCP, or Azure)

・Native-level Japanese proficiency

Personnel Requirements (Nice to Have)

・Architectural knowledge of web application frameworks and runtimes (Java, Python, .NET, Node.js, etc.)

・Documentation skills including business process design, UI/screen design, sequence diagrams, and ER diagrams

・Experience providing design support in agile development environments

・End-to-end project experience spanning requirements definition through operational design

Job Description

Location:

San Ai Kayabacho Building 5F, 2-13-11 Nihonbashi Kayabacho, Chuo-ku

Posted on:

2 June 2026

Fee:

Determined individually based on professional ability and experience.

Treatment:

We provide a welfare system that covers all transportation expenses and provides various social insurance benefits.

Holidays:

2 days off per week (Saturday and Sunday), public holidays, year-end and New Year holidays, maternity leave, childcare leave, etc.

Working style:

・Flextime system

・Discretionary work (a work style in which the employee is free to decide how to accomplish their goals and how to allocate their time)

・Actively introduce teleworking (frequency of coming to the office varies depending on the team/project situation)

人材要件(Must Have Experience)

​人材要件(Nice to Have)

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