Marketing Technology company | Full-Stack Engineer | Marketing Technology / Hybrid Work | Japanese Business Level

★ 【AD Platform】Full-Stack Engineer (DOOH Domain) | Marketing Technology Company

• Business Level Japanese Required

◆ Listed Company

◆ Hybrid Work

◆ Global Business

◆ Great Welfare

◆ Annual Salary： 8 million ～ 18 million yen.

-------------【About the company】-------------

Business Overview.

Development and provision of advertising delivery platforms for Internet media

(2) Providing marketing support services for advertisers and advertising agencies

They support the development and introduction of the marketing automation system, the CRM/SFA and the chat tool.

[Specifically...]

In the realm of ad technology and digital marketing, they use cutting-edge technology to independently develop products that help our clients maximize their revenues.

In particular, they are focusing on platform business, which analyzes users' access to ad spaces in web media and smartphone applications and delivers the most appropriate ads in a real-time auction format.

In fiscal 2016, the core business expanded to the No. 1 scale in Japan.

In addition, they have developed six products in-house: "SSP," "DSP," "DMP," "Marketing Automation," "CRM/SFA," and "Chatbot" for domestic and overseas markets.

As of June 2019, they have six overseas offices in five countries, including Singapore, Vietnam, Indonesia, Thailand, and India. Even in rapidly growing Asia, we are working to maximize advertising revenue for local companies by leveraging Japan's advanced technological capabilities.

Going forward, they will continue to lead the field of ad technology both in Japan and abroad, and take on the challenge of exploring unknown areas.

-------------【 Job Description】-------------

■Recruitment Background

The company operates one of Japan's premier ad platform businesses, managing high-scale SSP/DSP operations that handle tens of billions of requests per month.

To capitalize on the rapidly growing DOOH (Digital Out-of-Home) market, the company is seeking a Full-Stack Engineer to build a new ad delivery management product from the ground up (0-to-1 stage) and drive the technical expansion of this business unit.

The DOOH market is expanding at an annual rate of 20% to 30%, with further acceleration anticipated as programmatic advertising becomes widespread. While the company currently acts as an agency for premium direct ad sales, its goal is to build an in-house proprietary product to automate and optimize delivery management, enabling the business to scale exponentially.

In this role, you will build the entire technical foundation of the DOOH business end-to-end—ranging from the architecture and development of the delivery management core to digital signage applications and integrations with external media channels.

■Responsibilities

Ad Delivery Management Product Development

・Feature Design & Implementation: Designing and implementing features for product management, inventory management, order placement, delivery configuration, reporting, and role-based access control (RBAC).

・Workflow Automation: Translating operational workflows (Order → Verification → Approval → Configuration → Launch) into smooth software features.

・End-to-End Execution: Developing the entire system from the backend (API and database architecture) to the frontend (admin dashboard UI/UX).

・Operational Efficiency: Streamlining day-to-day operations through template creation, workflow engineering, and automation.

・Iterative Improvement: Driving MVP (Minimum Viable Product) development and continuous iterations based on user feedback.

Dedicated Device & Android Application Development

・Digital Signage Apps: Designing and developing native Android applications tailored for digital signage systems.

・Playback & Scheduling Control: Managing creative asset playback (videos, images) and synchronized delivery scheduling.

・Hardware Integration: Establishing seamless communication with digital signage hardware for remote control and status monitoring.

・Data Ingestion: Capturing logs (impressions, playback counts, etc.) and implementing robust data pipelines to servers.

・Performance Optimization: Optimizing device-level resources, including memory allocation, power consumption, and network efficiency.

External Integrations & SDKs

・API Integration: Designing and building robust API bridges with external media networks.

・System Resilience: Implementing asynchronous processing, retry mechanisms, and advanced error handling.

・Traceability & Auditing: Securing end-to-end traceability and maintaining comprehensive audit logs.

・SDK Development: Authoring external-facing SDKs alongside comprehensive technical documentation.

・Security Standards: Implementing robust authentication/authorization protocols and rate-limiting rules.

Operations Engineering

・Config Templates: Creating reusable delivery configuration templates for frequent workflows.

・Automated Scheduling: Automating real-time inventory updates and scheduling logic.

・Reporting & Alerts: Building automated report generators and communication integrations (Slack, email, etc.).

・Operator-Centric UI: Tailoring inventory, delivery, and reporting interfaces to match operator needs.

Technical Leadership

・Architecture Selection: Owning the technology stack selection and architectural design across the backend, frontend, Android, and infrastructure.

・Quality Assurance: Leading rigorous code and design reviews to maintain code quality.

・Technical Debt Management: Driving continuous refactoring and paying down technical debt.

・Mentorship & Documentation: Guiding and mentoring junior engineers while maintaining high-quality technical documentation and knowledge bases.

Key Advantages & Position Value

・0-to-1 Development in a High-Growth Market: The opportunity to build an ad delivery platform completely from scratch in the DOOH sector, which is currently expanding at an annual rate of 20% to 30%.

・Full-Stack Technical Discretion: Complete technical ownership across the entire stack—backend, frontend, Android, and cloud infrastructure—within a nimble, high-velocity team.

・Cutting-Edge Technical Challenges: Direct engagement with specialized engineering domains, combining digital signage, Android systems, hardware integration, and real-time programmatic ad delivery.

Future Career Paths

・Tech Lead → Engineering Manager within the DOOH Development Division

・Tech Lead across the company's entire Advertising Platform business unit

・Future Candidate for the CTO position

▼Development Environment

・Infrastructure: GCP, Kubernetes

・Containers: Docker

・Frontend: TypeScript (React, Next.js)

・Backend: Go, Python

・App: Kotlin

・DB: MySQL, BigQuery

▼Communication

・Project Management/Communication: Slack / Jira / Confluence

・CI/CD: Cloud Build

・Code Management: GitHub

・Other: Google Workspace

Work Style

The team primarily operates on an in-office schedule, with the flexibility to work from home up to 2 days per week. (Please note that this policy is subject to updates in the future based on changing business needs and organizational requirements.)

-------------【 Requirements】-------------

Required

2+ years of backend development experience

Experience in API design and implementation

Experience in database design

1+ years of development and operations experience in a cloud environment

Experience with AWS, GCP, or Azure

Experience with production environment operations

Experience in one or more of the following areas:

1+ years of front-end development experience

React / Next.js

TypeScript, state management (Redux, Vuex, etc.)

1+ years of Android development experience using Kotlin / Java

Device management, background processing, log collection

Preferred

Experience with Go

Development experience at a DOOH/ad tech company

Experience developing and operating digital signage systems

Experience with programmatic DOOH and ad delivery systems

Knowledge of the advertising industry (ad trading, delivery logic, etc.)

Experience designing and implementing external integrations (API/file integration, asynchronous processing)

Experience developing products from scratch

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【Working Hours】

10:00~19:00

【Holidays】

・Full holiday 2 day system (Saturday / Sunday) holidays

・Annual paid leave

・New Year Holiday

・Summer Holiday

・Winter Holiday

【Welfare】

・Book purchase subsidy (up to 30,000 yen per half year)

・Refreshment allowance (up to 5,000 yen per month)

・Rent allowance

・Support system for acquiring qualifications and languages, and support for attending training courses (individual application required)

・Working parents' support system

・Refreshment leave system

・Club activity allowance

・Other in-house events (monthly get-togethers, etc.)

・Use of Kanto IT Software Health Insurance Association's recreational facilities, affiliated sports clubs, etc.

・Regular health checkups (once a year)

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