Jumpei Ueno

Senior Cloud Infrastructure Engineer

hello@junueno.dev | junueno.dev | github.com/jun-uen0 | linkedin.com/in/jun-uen0
Japan (currently in Thailand, GMT+7)

Summary

Cloud infrastructure engineer who works at the boundary between production systems and the people who fund them. 6+ years owning AWS and GCP production estates end-to-end, with 30-40% cloud cost reduction reported weekly to the C-suite. Delivered regulated-industry infrastructure inside multi-vendor programs at Deloitte, and currently advises a Japanese logistics group’s executive team on DX directly. Publishes technical writing in both Japanese and English on a weekly cadence. Sole inventor of a 0-RTT VPN handshake (USPTO pending).

Languages

Japanese (native). English (business): daily written and spoken delivery with teams in Australia, Vietnam, and the Philippines; maintains a parallel English technical blog.

Experience

Mirai Logistics Group | DX / AI Advisor (Independent, Contract)

2026-06 to Present, Remote

• Advise the executive team (CEO and directors) of a Japanese logistics group on where AI can and cannot be applied to their operations, delivering findings and staged rollout plans directly to them.
• Designed and shipped an AI document-classification pipeline into production: an LLM agent decides the destination, a scheduled Apps Script performs the moves under a destination whitelist, and every action is written to an audit log and announced to Slack by a bot.
• Built the rollout as a series of reversible stages (dry-run, sandbox folder, then production) and obtained explicit stakeholder sign-off at each stage before widening scope.
• Ran a security and infrastructure review of the group’s SaaS estate and internal systems; delivered prioritized findings to the executive team.

Stack: GCP, Google Workspace, Apps Script, Slack API, Python, LLM agents.

FID K.K. | Senior SRE / Infrastructure Engineer (Contract)

2025-03 to Present, Remote

• Reduced AWS and GCP spend 30-40% across multiple accounts via orphaned-resource cleanup, off-hours scheduling, ECS right-sizing, and budget-alert design.
• Translated executive intent into infrastructure decisions and surfaced platform constraints back to the C-suite (CEO, CTO, CFO) in a weekly reporting cycle.
• Built AI-augmented infrastructure operations on Claude Code, delivering one engineer-year of capacity in production ops.
• Responded to three production DDoS incidents including SYN-flood, root-cause analysis through WAF deployment.
• Built Terraform-based IaC and Ansible automation; implemented Prometheus, Grafana, and Zabbix for observability and alerting.
• Supported DevOps adoption with the Philippine engineering team in English. Hired and mentored an engineer.

Stack: AWS, GCP, Terraform, Ansible, Python, Bash, GitHub Actions, Prometheus, Grafana, Zabbix, CloudWatch, Claude Code.

Deloitte | Specialist Senior (DevOps)

2024-08 to 2025-02, Tokyo

Connected-vehicle data platform for a major Japanese automotive manufacturer.

• Built ETL pipelines on GCP Dataflow with Java and Apache Beam, lifting throughput 60%.
• Terraformed GCP resources for consistent multi-environment deployment.
• Automated daily monitoring with Bash, cutting manual work 90%.

Stack: GCP Dataflow, Cloud Spanner, BigTable, BigQuery, Java, Terraform.

Deloitte | Specialist (DevOps)

2023-02 to 2024-07, Tokyo

Web application platform for a major Japanese megabank.

• Led the AWS infrastructure team in a multi-vendor program alongside NTT Data: sub-leader of 6, then team leader of 3. Owned weekly client-facing technical communication.
• Collaborated with the Australian engineering team in English on deployment and root-cause analysis.
• Owned GitLab CI/CD as the sole Deloitte-side engineer across 6 AWS environments, saving 250+ hours/month via ECS-based multi-environment automation for a Next.js and Sitecore / C# stack.
• Designed monitoring with JP1, CloudWatch, Lambda, and SNS for alerting and error notification.
• Built PowerShell tooling for bank tellers.

Stack: AWS ECS Fargate, RDS, Lambda, GitLab CI/CD, JP1, Bash, Python, PowerShell, Sitecore.

StrategIT K.K. (now GMO AI Connect) | Software Engineer

2022-01 to 2023-01, Tokyo

• Migrated EC2 to ECS Fargate, delivering ~30% server-cost reduction.
• Led an offshore team in Vietnam; built backend services on Node.js and Firebase.
• Built GitLab CI/CD automation, cutting manual deploy effort 65%.
• Implemented CloudFormation IaC, eliminating 90% of configuration drift.

Stack: AWS ECS, EC2, DocumentDB, CloudFormation, Docker, Bash, GitLab CI/CD.

Mirai Keikaku K.K. | Software Engineer / IT Division PM

2020-08 to 2021-10, Nagoya and Tokyo

Commercial fleet management platform.

• Designed AWS-based infrastructure on ECS and ECR; built the logistics system from planning through deployment.
• Built GitHub Actions CI/CD, cutting deploy time 50%.
• Built a driver operations dashboard on Google Apps Script with REST API integration.
• Promoted from Logistics Operations Lead to IT Division PM; managed a contracted engineer.

Stack: AWS ECS, Docker, GitHub Actions, Google Apps Script.

Patents

U.S. patent application, 0-RTT VPN handshake design. Filed 2026-03. Sole inventor. Under examination.

Skills

• Cloud: AWS (~7y), GCP (~5y)
• CI/CD and IaC: GitLab CI/CD, GitHub Actions, Terraform, Ansible, CloudFormation
• Containers: Docker, ECS Fargate, Kubernetes (proof-of-concept level)
• Languages: Python, Bash, TypeScript / Next.js, Go, C#, Java (Apache Beam)
• Observability: Prometheus, Grafana, Zabbix, CloudWatch, JP1
• Data: RDS MySQL / PostgreSQL / Aurora, DocumentDB, Redis, Cloud Spanner / BigTable / BigQuery
• Security: DDoS mitigation including SYN-flood, WAF deployment, cryptographic protocol design (USPTO pending)
• AI-augmented operations: Claude Code in production infrastructure ops (sandboxed IAM, read-only OS users, hooks, internal governance documents)

Certifications

AWS Certified Developer (Associate). AWS Cloud Practitioner. Google IT Automation with Python. Orchestrating the Cloud with Kubernetes (Coursera, AWS).

Education

Tokai College of Architecture, Associate Degree in Interior Design. 2013-04 to 2015-03.