Senior Software Engineer, Core Services (Ingestion) at ARM Treasure Data

Tokyo, Tokyo, Japan -

Full Time

Start Date

Immediate

Expiry Date

20 May, 26

Salary

14000000.0

Posted On

19 Feb, 26

Experience

2 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

Backend Engineering, Distributed Systems, Data Ingestion, System Reliability, Scalability, Cost Efficiency, Kotlin, Java, AWS, Metrics, Monitoring, Design Reviews, Code Reviews, Mentoring, Real-Time Data, Near-Real-Time Data

Industry

Software Development

Description

Treasure Data: At Treasure Data, we’re on a mission to radically simplify how companies use data and AI to create connected customer experiences. Our intelligent customer data platform (CDP) drives revenue growth and operational efficiency across the enterprise to deliver powerful business outcomes. We are thrilled that Forrester has recognized Treasure Data as a Leader in The Forrester Wave™: Customer Data Platforms For B2C. It's an honor to be acknowledged for our efforts in advancing the CDP industry with cutting-edge AI and real-time capabilities. Furthermore, Treasure Data employees are enthusiastic, data-driven, and customer-obsessed. We are a team of drivers—self-starters who take initiative, anticipate needs, and proactively jump in to solve problems. Our actions reflect our values of honesty, reliability, openness, and humility. We are growing our platform organization and looking for experienced backend engineers to help strengthen the core systems that power our data platform. About the Ingestion Team The Ingestion team owns the entry point into the Treasure Data platform. We reliably ingest high-volume event data from external sources, apply safe and programmable transformations, buffer data durably, and deliver it to multiple downstream storage and processing systems. These pipelines form the foundation for analytics, personalization, and AI-driven use cases across the platform. As event volumes scale into the billions per day, the team plays a critical role in enabling customer growth, maintaining platform reliability, and preparing the system for multi-fold increases in traffic in a predictable and cost-efficient way. Your Role As a Senior Software Engineer on the Core Services (Ingestion) team, you will: Design, build, and operate large-scale backend services for real-time and near-real-time data ingestion Own major components or services end-to-end, from design through production operations Improve system reliability, scalability, and cost efficiency under high and unpredictable traffic Collaborate with product, customer success, and other engineering teams to support customer onboarding and growth Participate in on-call rotations and take ownership of production issues and incident follow-ups Use metrics, monitoring, and data to guide engineering decisions Contribute clean, well-tested code and actively participate in design and code reviews Mentor junior engineers and raise the technical bar of the team through example About You You are an experienced backend engineer who enjoys working on distributed systems and operating software in production. You: Have 3+ years of professional software engineering experience (or equivalent practical experience) Have built and maintained backend or distributed systems at scale Understand reliability, availability, and failure modes in production environments Are comfortable owning services with real customer and business impact Write clear, maintainable, and well-tested code Communicate effectively in a distributed, global team Are comfortable working primarily with Kotlin and Java, and open to learning new tools and technologies Have experience with cloud platforms such as AWS Business-level English proficiency Bonus Points Experience with streaming or real-time data systems (Kafka, Kinesis, Flink, Spark) Experience scaling systems by 3–5× or more Familiarity with infrastructure as code, observability, or CI/CD Open-source contributions Physical Requirements: 3 days at Treasure Data Office About Treasure Data: Treasure Data is the Intelligent Customer Data Platform (CDP) built for enterprise scale and powered by AI. Recognized as a Leader by Forrester and IDC, Treasure Data empowers the world’s largest and most innovative companies to deliver hyper-personalized customer experiences at scale that increase revenue, reduce costs, and build trust. Through unique capabilities such as the Diamond Record, AI Agent Foundry, and AI Decisioning with Real-Time Personalization, Treasure Data enables marketing and CX teams to personalize cross-channel engagement in real-time, optimize marketing spend while increasing ROI, and drive customer lifetime value through more intelligent retention and loyalty. Our Dedication to You: We value and promote diversity, equity, inclusion, and belonging in all aspects of our business and at all levels. Success comes from acknowledging, welcoming, and incorporating diverse perspectives. Diverse representation alone is not the desired outcome. We also strive to create an inclusive culture that encourages growth, ownership of your role, and achieving innovation in new and unique ways. Your voice will be heard, and we will help amplify it. Agencies and Recruiters: We cannot consider your candidate(s) without a contract in place. Any resumes received without having an active agreement will be considered gratis referrals to us. Thank you for your understanding and cooperation!

Responsibilities

The Senior Software Engineer will design, build, and operate large-scale backend services responsible for real-time and near-real-time data ingestion into the platform. This role involves owning major components end-to-end, focusing on improving system reliability, scalability, and cost efficiency under high traffic.