With AI, security, and management,we protect and grow your product.

MOOBON is a tech company made up entirely of engineers.
From system design and development to cloud infrastructure, security, and DX support, we protect your product and do our utmost to help it grow.

Our Business Contact Us

Services

From system development, infrastructure, and security to technical advisory, our small team of engineers provides one-stop support from requirements definition to operations and improvement.

Our Service 1/6

System Development

From launching new products to renewing existing systems, end to end from requirements to operations

Our Service 2/6

Cloud Infrastructure

Design, build, and operations on AWS, GCP, and Cloudflare, plus cloud cost reviews

Our Service 3/6

Security

From AWS security assessments and vulnerability fixes to forensic investigation when incidents happen

Our Service 4/6

AI Adoption / Automation

Bringing Claude and AWS Bedrock into your business to automate analysis and development work

Our Service 5/6

Technical Advisory / CTO Support

Technology selection, architecture reviews, and engineer hiring, as your external CTO

Our Service 6/6

Kinsta Implementation & Operations

As Japan's first official Kinsta partner, we keep your WordPress secure and fast

News

Tech Notes

First-hand insights on AWS, Kinsta, WordPress, and infrastructure operations

ECS

2026.09.30

More CPU/Memory for ECS Batch Jobs Only: Override from the Schedule Input

On ECS Fargate, web and batch often run the same image, yet many teams keep two task definitions just because the CPU/memory differs. An ECS scheduled task is an EventBridge rule, and the target's Input is passed straight to RunTask as overrides, so task-level cpu / memory can be overridden on the rule. Our first-hand record of merging into the single web task definition on a system we operate and launching only the batch at 2 vCPU / 8 GiB: how it works, what can and cannot be overridden, the AWS CLI steps and verification, and the caveats around the console and put-targets.

Certification

2026.06.23

The Claude Extension Is Great for Certification Study ── Taking On the SAP in 15 Days

I took on the AWS Certified Solutions Architect – Professional (SAP) exam 15 days after I started studying, and passed on July 2 with a score of 802. I had more than 10 years of hands-on experience, but my certifications had lapsed. This is a record of how I combined CloudTech's practice questions with the Claude extension and used a study method of "building understanding through dialogue": never asking for the answer, always arguing my own reasoning first. It let me really grasp even services I had never used, as if I had actually used them.

Security

2026.06.06

AWS Access Management in the AI Era: From IAM Users to SSO + AssumeRole

When AI coding agents run shell commands on their own, the risk of long-term access keys (AKIA…) sitting on your PC goes up a notch. This is our record of dropping per-client IAM users and standardizing on a single approach: log in once to MOOBON's SSO, then switch into each account with AssumeRole. We share first-hand, reproducible steps, from the design rationale (temporary credentials, MFA, trust policies) to writing ~/.aws/config, aws sso login, the pitfall where the console's "Switch role" doesn't work, and generating a sign-in URL.

Database

2026.06.04

RDS for MySQL 8.0 Extended Support Is Expensive: Move to 8.4 Early

Standard support for RDS for MySQL 8.0 ends on July 31, 2026, and Extended Support charges start on August 1. They're steep and easy to overlook: in Tokyo, even a single 2 vCPU instance adds $175/month (about ¥28,000, nearly 10x the instance cost), three instances add ¥84,000/month, and Multi-AZ doubles it. Finish the upgrade within standard support and you pay nothing. A first-hand record of migrating three of our production RDS instances to 8.4 LTS (8.4.9) with Blue/Green Deployments and under one minute of downtime, plus three easy-to-miss pitfalls (MyISAM / option groups / deletion protection).

FinOps

2026.06.02

AWS Cost Reduction: Slashing Bandwidth Costs for a VR Video Streaming Service

A case study on drastically cutting the AWS bill of a service that streams 1.7TB / 3,200+ VR videos, with data transfer (its biggest cost driver) as the main target. We break down the gap between what the invoice line items say and what is actually billed (transfer, EBS, Extended Support fees), then walk through two changes of direction (CloudFront abandoned → Cloudflare R2 rejected → Bunny.net adopted) before landing on a three-tier setup that uses CloudFront as Bunny's origin and Perma-Cache for persistence. Also covers an end-to-end test with a 760MB video, day-to-day operations, failover, and an instant-rollback design, all from first-hand experience (figures are estimates).

Rails

2026.05.14

Implementing a PWA in Rails 8 (Phase 1+2)

The PWA scaffold that Rails 8 generates (manifest.json.erb / service-worker.js) is almost empty. This first-hand implementation log of Phase 1+2 of our in-house certification study app covers everything it takes to turn it into a real PWA: a proper manifest, five icon variants, iOS-specific meta tags, a Stimulus-based install prompt, Service Worker caching strategies, and an offline fallback.

Rails

2026.05.13

How We Cut a Rails CSV Download from 60s to 1.5s (40x Faster)

A real-world case of fixing a Rails CSV download that kept timing out, without moving it to background jobs or batch processing. Reworking only the export logic took it from 60s to 1.5s (40x faster). We walk through the rewrite to a streaming response with Enumerator + response_body and explain why we chose not to do a major overhaul, with measurements throughout.

Workflow

2026.05.12

Running WordPress with Claude Code (SSH): WooCommerce Across 6 Major Versions

On a WordPress project where we had been deliberately cautious about major version upgrades because of compatibility-testing costs and the risk of a custom child theme, we moved forward step by step by having Claude Code run WP-CLI over SSH. This write-up covers the Kinsta Staging snapshot safety net, the division of labor that keeps Phase state in CLAUDE.md and docs/tasks/, and where we draw the line with a human final approval. First-hand data: WooCommerce 4.5.5 → 10.0.4 (6 major versions), outdated template warnings 35+ → 1, and on a single product page -42% queries / -30% peak memory / -37% PHP generation time, plus a defense against accidental customer emails.

Let's accelerate
your product's growth together.

Unsure about technology choices? Want to build fast with a small team? Worried about security? Feel free to get in touch.

With AI, security, and management,we protect and grow your product.

Services

System Development

Cloud Infrastructure

Security

AI Adoption / Automation

Technical Advisory / CTO Support

Kinsta Implementation & Operations

News

Tech Notes

More CPU/Memory for ECS Batch Jobs Only: Override from the Schedule Input

The Claude Extension Is Great for Certification Study ── Taking On the SAP in 15 Days

AWS Access Management in the AI Era: From IAM Users to SSO + AssumeRole

RDS for MySQL 8.0 Extended Support Is Expensive: Move to 8.4 Early

AWS Cost Reduction: Slashing Bandwidth Costs for a VR Video Streaming Service

Implementing a PWA in Rails 8 (Phase 1+2)

How We Cut a Rails CSV Download from 60s to 1.5s (40x Faster)

Running WordPress with Claude Code (SSH): WooCommerce Across 6 Major Versions

Cutting the NAT Gateway Bill: Moving to fck-nat While Keeping a Static IP

How One Checkbox in ACM Cost Us $430: An Incident Record

Finding and Recovering $310/Month in AWS "Hidden Fixed Costs"

Migrating 14 Sites and 28 WordPress Installs from Amazon Linux 2 to 2023

Let's accelerate
your product's growth together.

Clients & Partners

Japan's First Official Kinsta Partner

A small team of elite engineers

Takeshi Minami

Yuzo Nishikawa

Tam Nguyen

Tung Nguyen Duy

+ support engineers in every domain

Contact & Company Info

Recording of Calls
and Online Meetings

With AI, security, and management,we protect and grow your product.

Services

System Development

Cloud Infrastructure

Security

AI Adoption / Automation

Technical Advisory / CTO Support

Kinsta Implementation & Operations

News

Tech Notes

More CPU/Memory for ECS Batch Jobs Only: Override from the Schedule Input

The Claude Extension Is Great for Certification Study ── Taking On the SAP in 15 Days

AWS Access Management in the AI Era: From IAM Users to SSO + AssumeRole

RDS for MySQL 8.0 Extended Support Is Expensive: Move to 8.4 Early

AWS Cost Reduction: Slashing Bandwidth Costs for a VR Video Streaming Service

Implementing a PWA in Rails 8 (Phase 1+2)

How We Cut a Rails CSV Download from 60s to 1.5s (40x Faster)

Running WordPress with Claude Code (SSH): WooCommerce Across 6 Major Versions

Cutting the NAT Gateway Bill: Moving to fck-nat While Keeping a Static IP

How One Checkbox in ACM Cost Us $430: An Incident Record

Finding and Recovering $310/Month in AWS "Hidden Fixed Costs"

Migrating 14 Sites and 28 WordPress Installs from Amazon Linux 2 to 2023

Let's accelerate your product's growth together.

Clients & Partners

Japan's First Official Kinsta Partner

A small team of elite engineers

Takeshi Minami

Yuzo Nishikawa

Tam Nguyen

Tung Nguyen Duy

+ support engineers in every domain

Contact & Company Info

Recording of Calls and Online Meetings

Let's accelerate
your product's growth together.

Recording of Calls
and Online Meetings