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About the Role

We are seeking a Data Engineer to build the data foundation for our next-generation customer communication as a service (CCaaS) product from the ground up. This role is responsible for the entire data backbone of a V1 product: pipelines, storage, and the data platform that our analysts and product managers will depend on from day one. You will be a foundational member of a team dedicated to creating a revolutionary CCaaS product in a startup-like environment. If you are passionate about building first-version (V1) data infrastructure where nothing exists yet, and want your work to directly shape how a product team thinks and decides, this is the perfect opportunity for you.

Responsibilities

Design, build, and own the data infrastructure for the V1 CCaaS product, from ingestion through serving, supporting the business unit's analytics needs.
Develop and operate production-grade ETL/ELT pipelines with orchestration tools, ingesting and transforming large volumes of data generated by chatbot events and customer journey interactions.
Architect and optimize cloud data warehouse datasets across medallion-style layers (raw bronze, cleansed silver, aggregated gold), with partitioning, clustering, and SQL tuning for large-scale analytical workloads.
Design event-centric data models at session and turn grain that serve both operational features and analytical reporting, keeping the product's operational layer and analytical layer consistent.
Keep every pipeline reliably dependable in production through data quality checks, monitoring, and observability.
Partner with Data Analysts and Product Managers to understand data needs, iterating requests into scalable, reusable data products.
Integrate real-time or near-real-time data streams as the product's event volume grows.
Establish data governance fundamentals: standardized event definitions, schemas, and naming conventions across all smart agents, plus documentation, lineage, and access control.

Requirements

Over 5 years of hands-on experience in data engineering, including building and operating production data pipelines.
Advanced SQL and strong proficiency in at least one programming language such as Python or Go.
Experience with cloud data warehouses such as BigQuery, Snowflake, or Databricks, including performance tuning at scale.
Experience with ETL/ELT orchestration tools such as Apache Airflow, dbt, or Google Cloud Dataflow.
Experience designing analytics data models and data marts across layered architectures (medallion bronze/silver/gold), owning their quality and documentation.
Familiarity with streaming technologies such as Kafka or Pub/Sub for real-time ingestion.
Experience building data infrastructure from scratch (greenfield or V1 product context).
Experience partnering with analysts, product managers, or engineers to deliver reliable, reusable data solutions.
Fluent in English, with strong communication skills to collaborate effectively in a multinational environment.
Ability to design data solutions robust enough to absorb ambiguity and changing requirements typical of V1 product development in a fast-paced, agile environment.
Experience with cloud-native deployment: Docker, Kubernetes, and CI/CD for data workloads.
Familiarity with IaC tools such as Terraform for data infrastructure provisioning.
Experience with distributed data processing frameworks such as Apache Spark for large-scale data transformation.
Data quality or data governance tooling experience (e.g., dbt tests, Soda, Elementary, data catalogs).
Analyst skillset: ability to explore data, perform exploratory data analysis, create dashboards in BI tools (e.g., Tableau, Looker, DOMO), and support A/B test analysis.
Experience in the CCaaS, communications technology, telecom, or AI-driven product space.

Skills

Data Engineering
ETL/ELT
SQL
Python
Go
BigQuery
Snowflake
Databricks
Apache Airflow
dbt
Google Cloud Dataflow
Dimensional Modeling
Kafka
Pub/Sub
Docker
Kubernetes
CI/CD
Terraform
Apache Spark
Data Quality
Data Governance
Tableau
Looker
DOMO
A/B Testing

Location

Tokyo

Work Type

Full-time

Experience Level

Over 5 years of hands-on experience

About the Company

The Rakuten Group, Inc. is a global leader in internet services that empower individuals, communities, businesses, and society.
Founded in Tokyo in 1997 as an online marketplace, Rakuten has expanded to offer services in e-commerce, fintech, digital content, and communications to approximately 1.7 billion members around the world.
The Rakuten Group has nearly 32,000 employees and operations in 30 countries and regions.
The AI & Data Division (AIDD) creates powerful, customer-focused search, recommendation, data science, advertising, marketing, price, and inventory optimization solutions for a variety of businesses across the Rakuten Group.
As part of AIDD, the Conversational Experiences Department (CXD) focuses on AI for customer service.
We build conversational AI products such as chatbots, voicebots, and copilot tools to support human operators.
You'll join a 60-person AI for Customer Service team of engineers, scientists, data analysts, and dialogue designers, responsible for modernizing legacy contact-center tooling and workloads into an agentic Generative AI stack codenamed Raptor.
We already power more than 10 customer and sales support chat services.
Now, we're in scale-up mode, expanding to all 70 BUs and using AI to multiply Rakuten's core capabilities in e-commerce, finance, logistics, digital content, and beyond.