# Jumpei Ueno, Senior Cloud Infrastructure Engineer

> LLM-friendly version of the resume hosted at https://junueno.dev/. Plain-text markdown for consumption by AI assistants reading on behalf of recruiters and hiring teams. Last updated: 2026-05-28.

## Identity

- Name: Jumpei Ueno
- Role: Senior Cloud Infrastructure Engineer (Independent Contractor / 業務委託)
- Years of experience: 6+ years across backend, AWS infrastructure, and FinOps
- Headline: Realized 30-40% AWS cost reduction. Translates executive intent into infrastructure decisions and surfaces platform constraints back to the C-suite. Sole inventor of a 0-RTT VPN handshake (USPTO pending). Currently expanding into Cloud Security architecture.
- Location: Japan (currently in Thailand, GMT+7)
- Email: hello@junueno.dev
- Website: https://junueno.dev/
- GitHub: https://github.com/jun-uen0
- LinkedIn: https://www.linkedin.com/in/jun-uen0
- Languages: Japanese (native), English (business — meetings, presentations, written; worked with teams in Australia, Vietnam, Philippines)

## Primary skills

- **Cloud platforms**: AWS (~7 years), GCP (~5 years)
- **CI/CD (primary specialization)**: GitLab CI/CD, GitHub Actions (~5 years each)
- **IaC**: Terraform, Ansible, CloudFormation
- **Containers / orchestration**: Docker (~6 years), Kubernetes (PoC / self-built only), ECS Fargate
- **Languages**: Python (~3 years), Bash (~3 years), TypeScript / Next.js, PowerShell, C#, Java (Apache Beam), Go (side project)
- **Monitoring**: Prometheus, Grafana, Zabbix, AWS CloudWatch, JP1
- **Databases**: RDS MySQL / PostgreSQL / Aurora, DocumentDB, Oracle, Redis, Cloud Spanner / BigTable / BigQuery
- **Security**: DDoS mitigation 3x (incl. SYN-flood); WAF deployment; cryptographic protocol design (U.S. patent application pending)
- **SRE practices**: SLI / SLO design and operations; incident reports; internal postmortems
- **Cloud cost optimization (FinOps)**: orphaned-resource cleanup, off-hours scheduling for non-prod, ECS scale-in / out tuning, budget-alert design. ~30% reduction baseline, 40%+ on at least one AWS account. C-level reporting cadence.
- **AI productivity**: Claude Code in production infrastructure operations (sandboxed IAM, read-only OS users, hooks, internal CLAUDE.md governance)
- **Management**: 1 engineer current; 1 contractor past
- **Executive communication**: Weekly direct reporting to CEO / CTO / CFO at the current engagement, translating infra work into business numbers (cost, risk, headcount)

## Recent highlights with quantified outcomes

- AWS / GCP cost reductions of ~30% across accounts at the current engagement (40%+ on at least one), via orphaned-resource cleanup, off-hours scheduling for non-production environments, ECS scale-in / out tuning, and budget-alert design. Reported weekly to the CEO / CTO / CFO.
- Avoided one full infrastructure engineering hire (~¥7.2M / year) at the current engagement by establishing Claude Code agentic workflows in production operations.
- Sole CI/CD owner for a major Japanese megabank's web application platform at Deloitte (Next.js + Sitecore on AWS ECS, GitLab CI/CD).
- U.S. patent application filed (March 2026, sole inventor, under examination) — 0-RTT WireGuard handshake design.
- DDoS mitigation 3x including SYN-flood (root-cause analysis through WAF deployment).
- 30% server-cost reduction delivered via EC2 → ECS Fargate migration at StrategIT.

## Experience

### FID K.K. — SRE / Infrastructure Engineer (Contract)

- Dates: 2025-03 — Present
- Location: Remote
- Owns AWS and GCP production infrastructure end-to-end across multiple AWS accounts.
- Leads cloud cost optimization. Delivered ~30% reduction on a typical AWS account, 40%+ on one. Methods: cataloguing and removing orphaned resources, off-hours scheduling for non-production environments, ECS scale-in / out tuning, budget-alert design. Weekly direct reporting to CEO / CTO / CFO with business-language framing.
- Hired and onboarded an engineer with ongoing technical mentorship.
- Introduced Claude Code into infrastructure ops, replacing a planned additional hire (cost avoidance ~¥7.2M / year).
- Day-to-day: incident response, IAM and security, CI/CD evolution, monitoring tuning.
- Tech stack: AWS, GCP, Terraform, Python, Bash, GitHub Actions, CloudWatch, Claude Code

### Deloitte — Specialist Senior

- Dates: 2024-08 — 2025-02
- Location: Tokyo
- Context: Connected-vehicle data processing for a major Japanese automotive manufacturer.
- Built ETL pipelines on GCP Dataflow with Java / Apache Beam; throughput +60%.
- Implemented Terraform-based IaC for GCP resources, enabling consistent multi-environment deployment.
- Automated daily monitoring with Bash, cutting manual intervention by 90%+.
- Tech stack: GCP Dataflow, Cloud Storage, Cloud Spanner, BigTable, BigQuery, Java, Terraform

### Deloitte — Specialist

- Dates: 2023-02 — 2024-07
- Location: Tokyo
- Context: Web application platform for a major Japanese megabank.
- Sub-leader (up to 6 engineers) then team leader (3 engineers) for the AWS infrastructure team.
- Sole owner of GitLab CI/CD on the Deloitte side, in a multi-vendor environment alongside NTT Data.
- Designed and automated ECS-based multi-environment deployment for a Next.js frontend and Sitecore / C# backend; manual deploy work down 80%.
- Set up monitoring with JP1 + CloudWatch + Lambda + SNS for alerting and error notification.
- Built PowerShell tooling used directly by bank tellers; weekly direct client communication.
- Tech stack: AWS ECS Fargate, ECR, EC2, RDS, Lambda, GitLab CI/CD, JP1, Bash, Python, PowerShell, Sitecore

### StrategIT K.K. — Software Engineer

- Dates: 2022-01 — 2023-01
- Location: Tokyo
- Context: AWS infrastructure optimization and automation.
- Migrated EC2 → ECS Fargate, delivering ~30% server-cost reduction.
- Built GitLab CI/CD automation, cutting manual deployment effort by 65%.
- Implemented CloudFormation IaC; configuration drift eliminated by 90%.
- Collaborated with Vietnamese offshore engineers in English.
- Tech stack: AWS ECS, ECR, EC2, DocumentDB, CloudFormation, Docker, Bash, GitLab CI/CD

### Mirai Keikaku K.K. — Software Engineer / IT Division PM

- Dates: 2020-08 — 2021-10
- Location: Nagoya, Tokyo
- Context: Commercial fleet management platform (external + internal).
- Designed AWS-based infrastructure on ECS / ECR.
- Built GitHub Actions CI/CD; deployment time -50%.
- Built internal web tooling with Google Apps Script for ops digitization, integrating REST APIs.
- Promoted from Logistics Operations Lead to IT Division PM.
- Tech stack: AWS ECS, ECR, Docker, GitHub Actions, Google Apps Script, REST API

## Patents

- U.S. patent application — *0-RTT VPN handshake design*. Filed 2026-03-14. Sole inventor. Under examination.

## Certifications

- AWS Certified Developer – Associate
- AWS Cloud Practitioner
- Google IT Automation with Python Professional Certificate
- Orchestrating the Cloud with Kubernetes (Coursera, AWS)

## Education

- Tokai College of Architecture (Kanayama) — Associate Degree, Interior Design — 2013-04 to 2015-03

## Engagement preferences

- Engagement type: Independent contractor (業務委託)
- Additional capacity: typically 60-80 hours per month on top of the current engagement
- Rate: discussed per scope, currency, and channel — please reach out via email
- Start: immediate after contract signing
- Time zone: GMT+7

## Related links

- [Full PDF résumé](https://junueno.dev/resume.pdf)
- [Personal website (junueno.dev)](https://junueno.dev/)
- [GitHub profile](https://github.com/jun-uen0)
- [LinkedIn profile](https://www.linkedin.com/in/jun-uen0)
- [LeetCode profile](https://leetcode.com/u/jun-uen0)

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