Available for Projects & Consulting (Architecture · API · Mobile · Cloudflare Security)
ICON PLACEHOLDER · Final brand icon coming soon
Veloxa (ベロクサ)
Resilient System Architecture & Mindful Product Engineering.
Full-Stack & Mobile App Architect Studio in Japan — Created by Kapibara91 (カピバラ９１)
Veloxa (ベロクサ) is a Japan-based personal engineering brand and product studio. Alongside crafting mindful consumer applications tailored to daily life in Japan, I deliver end-to-end technical execution—from upstream requirements definition and system architecture to Java / Python / Go backend APIs, Cloudflare / GCP / AWS hardened cloud infrastructure, and native iOS / Android applications.
5 Products
Consumer & B2B products shipped across iOS, Android, and Web
End-to-End
Upstream design, backend APIs, native mobile, and Cloudflare edge security
JP / EN / ZH
Trilingual business alignment and technical documentation
Repit (レピット)
Flagship Product
In Development
AI Receipt Scanner · Japan Invoice (T-Number) Verifier · Compliance Vault
Live Preview at repit-app.jp
iOS
Android
Web Workspace
Japan NTA API Integration
AI-OCR (8%/10% Tax Split)
SHA-256 Tamper-Proof Vault
7-Year AES-256 Backup
Accountant CSV/ZIP Export
"Just snap your receipt." An AI-powered expense and tax compliance vault tailored for freelancers, solo founders, and SMB teams in Japan who want compliance without bloated accounting software. Solves four major pain points: (1) tedious manual 13-digit T-Number lookups on the NTA portal, (2) manual calculator splitting of 8% reduced vs. 10% standard consumption tax on convenience store receipts, (3) strict Electronic Book Preservation Law requirements (tamper-proofing, 3-condition search, 7-year retention), and (4) month-end file organization for tax accountants. Visit the dedicated official portal at repit-app.jp for the 7-tax-benchmark interactive demo and free T-Number verifier.
Tsuzuri (つづり)
Japanese Aesthetic Journal & Personal ZINE Maker
iOS
Android
One Entry a Day
Vertical Typography
Traditional Japanese Colors
100% Local Storage
Free
A serene journaling app inspired by traditional Japanese colors and typography. Features a mindful one-entry-per-day commitment, authentic Japanese vertical text layout switching, automated monthly booklet (ZINE) compilation, and traditional Hanko stamp seals.
Gomiman (ゴミマン)
Japan Waste Sorting Guide & Collection Schedule
iOS
Android
Real-Time Family Sync
523-Item Encyclopedia
Home Screen Widgets
Smart Reminders
Eliminates the daily question of "Which trash day is it today?" across Japanese municipalities. Features real-time family cloud synchronization, a searchable 523-item waste sorting encyclopedia, home screen widgets, customizable municipal rules, and calendar integration.
Chin! Suru Jikan (チン！する時間)
Smart Microwave Wattage Converter & Timer
iOS
Android
Time-Saving Utility
Quick Reference Table
Built for everyday cooking in Japan when food packaging lists heating times for 500W, while your home microwave runs at 600W or 700W. Instantly calculates the exact heating time across wattages and starts the countdown timer in a single tap.
Totono (整物語 / ととの)
Daily Routines · Household Chore Cycles · Baby Care Log
iOS
Android
Habit Tracking
Chore Cycle Manager
Baby Care Log
100% Local Storage
Free
An all-in-one daily life organizer designed to bring calm order to busy households. Combines habit check-ins, recurring household chore cycle management with tactile swipe interactions, and baby feeding/health logs. All data stays strictly on-device via SQLite Room.
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Upstream Architecture: Resilient Systems × Intuitive UX
True engineering value lies not in being tied to a single language or framework, but in architecting resilient, fault-tolerant backend systems and crafting intuitive, user-friendly applications. By combining extensive Japanese upstream design experience with AI-augmented workflows, I deliver production-grade systems in a fraction of traditional agency timelines.
Requirements & Upstream Design
Resilient System Architecture
User-Centric UI/UX
AI-Accelerated Delivery
⚙️
Backend APIs & High-Quality Native Mobile Engineering
Specializing in enterprise-grade backend APIs with Java (Spring Boot), Python, and Go (Golang), paired with high-craft native iOS / Android development for superior OS integration and smoothness. When budget efficiency or Web/Desktop reach is prioritized, I also build with Flutter and FastAPI.
Native iOS / Android
Java (Spring Boot)
Python (FastAPI)
Go (Golang)
Flutter (Web / Desktop)
RESTful APIs & DB Design
App Store & Play Release
🛡️
Cloud Security & Data Breach Prevention
In response to the rising wave of server breaches and data leaks across Japan, I enforce strict Security by Design from day one. Combining Google Cloud (GCP) / Firebase and AWS with Cloudflare edge security (WAF, DDoS mitigation, Zero Trust, Pages/R2), I safeguard corporate trust and user data.
Breach & Intrusion Prevention
Cloudflare (WAF / Zero Trust)
Google Cloud (GCP) / Firebase
AWS Architecture
Secure API Auth & Encryption
✓ Security by Design
Hardened Cloud & API Security
Backend systems follow major cloud best practices and Cloudflare edge protection, implementing vulnerability mitigation, least-privilege IAM, and encrypted communications in transit and at rest.
✓ Privacy by Design
Privacy First (Local-First)
No unnecessary personal data or behavioral tracking is ever collected. Sensitive user logs and journals remain strictly on-device (SQLite) or inside isolated, encrypted cloud vaults.
✓ Craft & Trilingual
Clean UX & Trilingual Execution
Software free of intrusive ads and clutter—combined with fluent JP / EN / ZH communication for Japanese enterprises, international engineering teams, and cross-border founders.