Java

programming language, object oriented, enterprise
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The enterprise workhorse that refuses to quit. For data engineering, Java is a powerhouse for building robust, scalable systems like custom ETL pipelines, distributed frameworks (hello, Hadoop), and real-time processing engines like Kafka Streams. Its JVM ecosystem and libraries (e.g., Apache Spark, Flink) make it a cornerstone for high-performance data applications where reliability matters.
That said, Java’s verbosity can feel like writing a novel for every task, and its boilerplate-heavy style makes simple things unnecessarily painful. While its performance is solid and memory management reliable, it lacks the modern elegance of languages like Go or Python. Plus, debugging messy stack traces from poorly tuned JVMs is no picnic.
Java thrives in large-scale, structured environments where maintainability and backward compatibility are king. It’s not the coolest language at the party, but when your data stack needs to scale like a Fortune 500 company, Java delivers—with plenty of paperwork.

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data scientist

データ・テクノロジーアドバイザリー【経営課題・金融規制・コンプライアンス関連】【GRC】 @ pwc-japan-グループ

JP | 2025-12-28
PwC Japan's GRC advisory posting reads as a data-leaning consulting role with a risk-and-compliance spine. Core work is analyzing regulatory and governance challenges for financial institutions,... read more »
Python, R, VBA, Java, C, SQL
data scientist

Solution Architect @ kinaxis

JP | 2025-12-28
This role is a senior consulting position at Kinaxis, a global leader in supply chain management. The job requires extensive experience in business software consulting, particularly in... read more »
Management, Agile/Scrum, SQL, R, Java, Python, SAP, C, ERP, RDBMS, AI/ML
promoted

The Fundamentals of Analytics Engineering

The Fundamentals of Analytics Engineering gives a holistic understanding of the analytics engineering lifecycle by integrating principles from both data analysis and engineering. It's a book that teaches concepts and best practices, not just tools and technologies.

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data engineer

Rust Engineer @ cybereason

JP | 2025-12-28
Cybereason’s backend/frontend role reads like a security data engineer’s dream and a license to juggle: five-plus years of full‑stack work, Rust primacy with Go/Java/C++, and cloud-native,... read more »
AI/ML, Analytics, API, Computer Science, Rust, Go, Java, Cloud Computing, Docker, SQL, NoSQL, ELK, Datadog, Big Data, DWH, ETL/ELT, Kafka, Flink, Spark, Redis, Management, DevOps
data scientist

BigData Technical Consultant /Architect @ ibm

JP | 2025-12-27
This Japan-based role involves analyzing customer data using analytics technology to support business and IT strategies, leveraging IBM's portfolio including software and Red Hat. The position's... read more »
IBM, AI/ML, BI, DWH, Data Lake, Data Governance, Analytics, Python, Java, C, SPSS, SAS
data scientist

BigData Technical Consultant /Architect @ ibm

JP | 2025-12-27
This role involves leveraging analytics to extract insights from diverse data, supporting strategic and operational initiatives with cutting-edge techniques. A key differentiator is familiarity... read more »
IBM, AI/ML, BI, DWH, Data Lake, Data Governance, Analytics, Python, Java, C, SPSS, SAS
data engineer

ALM Technical Support Engineer @ ptcinc

JP | 2025-12-27
PTC casts a broad net with a global Technical Support Engineer in its Support Services. The role is squarely customer-facing: you diagnose and fix enterprise business apps, cover Java or .NET... read more »
Management, Java, C#/.NET, XML, Computer Science
promoted

O'Reilly: Building AI Agents with Model Context Protocol (MCP)

Design and implement composable agent architectures using MCP. Understand the MCP architecture and how it enables AI applications to access external context. Build MCP servers that expose tools, resources, and prompts to LLMs.

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data engineer

【EDH】 デジタルエンジニア職 EYデジタルハブ採用 @ ernstandyoung

JP | 2025-12-26
EY Digital Hub Tokyo is seeking digital engineers and senior digital engineers for client-facing work across requirements definition, design, development, testing, deployment and ongoing support... read more »
Azure, SaaS, CRM, Microsoft, ERP, Marketing, API, Cyber Security, AI/ML, DWH, Data Lake, BI, Java, JavaScript, React, C, Python, SQL Server, PostgreSQL, MySQL, SAP, DevOps, CDP, Management
data engineer

Senior Data Engineer @ bain-and-company

JP | 2025-12-26
Senior Data Engineer in Bain’s AIS Data Engineering within the AI, Insights & Solutions team. You’ll design, build and deploy data solutions for production-scale client ecosystems, and own the... read more »
AI/ML, Analytics, Management, Data Engineering, Data Science, Cloud Computing, Python, Scala, C, C++, Java, Go, Airflow, Beam, SQL, NoSQL, Databricks, PostgreSQL, SQL Server, Oracle, MySQL, Redis, MongoDB, ELK, Hive, Apache HBase, Teradata, Cassandra, Redshift, AWS, Azure, GCP, Kubernetes, Terraform, DevOps, CI/CD, GitHub, Computer Science, Agile/Scrum
data scientist

Solution Consultant @ kinaxis

JP | 2025-12-25
This role is a strategic opportunity for a data engineer with a strong background in supply chain and manufacturing, but the description is vague and lacks specific technical details. The job... read more »
Management, Data Management, SQL, R, Java, Python, SAP, PhD, Computer Science, AI/ML
data engineer

Senior Technical Solutions Engineer (Platform) @ databricks

JP | 2025-12-24
Databricks Senior Technical Solutions Engineer promises frontline tech support for the Databricks platform, spanning complex issues, best practices for custom builds, and cross-cloud integrations,... read more »
Databricks, Analytics, Big Data, AWS, Azure, Python, Java, Scala, SQL, Linux, Unix, AI/ML, Data Lakehouse, Spark, Delta
data scientist

Trading and Research Summer Internship 2026 (Tokyo) @ capula_2

JP | 2025-12-23
This role is a high-impact, hands-on internship at a leading global hedge fund, offering direct engagement with quant traders and strategy development. The position emphasizes practical experience... read more »
Management, PhD, Computer Science, Excel, Python, C++, R, Java
data engineer

Sr. Solutions Architect @ databricks

JP | 2025-12-23
Databricks' Pre-sales, Sr. Solutions Architect role sits at the interface of enterprise evangelism and hard-core tech. You guide the evaluation of the Databricks Lakehouse Platform in a hands-on,... read more »
Analytics, AI/ML, Big Data, Cloud Computing, Databricks, Data Lakehouse, Data Engineering, Data Science, AWS, Azure, GCP, Spark, Hadoop, Cassandra, Python, Scala, Java, R, Delta
data engineer

Cloud Platform Engineer (Kafka Specialist) @ paypay-corp

JP | 2025-12-23
PayPay asks for a Kafka veteran who can both shepherd a self-hosted, multi-cluster streaming platform and navigate AWS MSK, all while moving toward KRaft and an event-driven architecture. The... read more »
Kafka, Data Streaming, AWS, Management, Java, Python, ELK, Athena, Docker, Kubernetes, Argo CD, GitHub, Jenkins, Terraform, Ansible, Logstash, Grafana, Confluence, Jira, Linux, Cloud Computing, Go, Git, CI/CD, Computer Science
promoted

O'Reilly Power BI Learning

Master Power BI fast: build basic-to-advanced visuals, apply smart design, use dynamic slicers/filters & new cards, choose the right chart, spotlight key insights, brand and theme reports, and seamlessly publish/share in the Service.

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analyst

Senior Customer Architect (Remote) @ imply

JP | 2025-12-21
Imply pitches Lumi as the industry’s first observability warehouse, and this role sits at the customer-facing hinge of pre-sales. You’ll bring deep Splunk expertise, plus Cribl, Grafana and... read more »
Spark, Druid, Analytics, Splunk, Grafana, ELK, Management, Cloud Computing, AWS, GCP, Azure, SQL, Python, Java, Kubernetes, GDPR/CCPA