Über Takuma
Berlin-based freelance Analytics Engineer specializing in dbt, BigQuery, and cloud-based data automation.
I help companies improve reporting workflows, clean up messy SQL/data pipelines, and automate manual operations using modern data stack technologies.
My background includes enterprise-scale projects in the energy, oil & gas, and travel industries, where I worked on data platform development, reporting automation, and AI-powered applications.
Recently, I designed and implemented large-scale dbt and BigQuery pipelines for metering and enterprise reporting systems, improving operational efficiency and data reliability.
I can support:
• dbt project development and optimization
• BigQuery data modeling and SQL performance improvement
• Reporting workflow automation
• Data quality and testing implementation
• Python-based backend/data processing
• Cloud-based data pipeline architecture on GCP
I am currently based in Berlin and available for freelance or part-time projects.
Japanisch
Muttersprachlich oder zweisprachig
Englisch
Verhandlungssicher
Deutsch
Grundkenntnisse
Vor Ort möglich
Berlin (bis zu 50 km)
Projekt- und Berufserfahrung
- Major Japanese Energy CompanyFreelance Data EngineerDIGITALAGENTUREN & IT-CONSULTINGSeptember 2025 - Heute (9 Monate)Berlin, Deutschland• Automated daily and monthly enterprise reporting workflows by building scalable dbt and BigQuery data pipelines for metering systems.• Designed and implemented 54 dbt models to standardize data transformation and reporting processes.• Improved production stability and data reliability by expanding test coverage across 138 dbt models.• Reduced manual operational workload through end-to-end reporting automation.• Deployed and managed cloud-based data processing workloads on Google Cloud Run integrated with BigQuery.Tech: dbt · BigQuery · Google Cloud Run · Python
- Future Co. / Major Japanese Energy Company ProjectData Engineer (Lead)DIGITALAGENTUREN & IT-CONSULTINGFebruar 2025 - Juli 2025 (5 Monate)Tokyo, Japan• Led requirements definition, architecture design, and implementation of 40 dbt models for oil and gas metering data pipelines.• Translated complex oil and gas measurement workflows into scalable dbt and BigQuery data pipeline architecture.• Served as delivery lead in a 4-person data engineering team, coordinating technical decisions and driving project execution.Tech: dbt · BigQuery · Google Cloud Run · Python
- Future Co. / Major Japanese Travel Agency ProjectFull-Stack Engineer (GenAI)DIGITALAGENTUREN & IT-CONSULTINGJuli 2024 - Februar 2025 (7 Monate)Tokyo, Japan• Built two GenAI prototypes for Japan’s largest travel agency to enhance both in-store and online customer experience.• Developed a voice-AI call center application to automate customer inquiries related to flight disruptions.• Developed an AI-powered facility recommendation application using image analysis to identify latent customer needs.• Conducted model evaluation, prototype development, performance testing, and user acceptance testing (UAT).• Presented prototype functionality and technical outcomes directly to client stakeholders.Tech: Python · Azure AI API · OpenAI API · LLM · Computer Vision · Voice AI
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Ausbildung und Abschlüsse
- M.Eng., Information ScienceSophia University (上智大学)2021M.Eng., Information Science
- B.Eng.Sophia University (上智大学)2019B.Eng.