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Rooted in R&D in broadcasting and telecommunications, I design and implement across video, 3D measurement, embedded systems, and distributed processing — end to end, from close-to-hardware layers up to applications. My primary language is C# / .NET; I also use C/C++, Python, and Kotlin daily.

• Broadcast & Video — MPEG2-TS / ARIB standards / HLS streaming
• 3D & Measurement — LiDAR & point clouds (LAS / LAZ) / sensors / AR
• Embedded & Payment Terminals — Android embedded / FeliCa・NFC / cashless payments
• Cloud & Distributed Processing — AWS / distributed rendering
• Wireless & Radio — Local 5G / radio-wave propagation & coverage
• Business Systems & Automation — WPF・WinForms / Blazor / scraping・RPA

• MPEG2-TS analysis/repair engine + HLS delivery platform — Conforms to ARIB STD-B10 / B24 / B25. Detects and repairs TOT/PCR inconsistencies originating from live broadcast waves, through to iOS/Android playback. Maintained over the long term.
• TS merge/repair toolset (tsrepair / PcrCheck / TotDupCheck / TotGapCheck, etc.) — C/C++.
• Closed-caption extraction tool (ARIB STD-B24) and a C# implementation of BonDriver.
• HLS video downloader — WebView2 + ffmpeg.

• LiDAR point-cloud processing / LAS・LAZ 1.4 parser — Built a custom C# wrapper for PDAL to use it from .NET.
• Parser for Livox's proprietary binary (LVX) and a multi-pane point-cloud viewer (OpenGL).
• SignalR-based real-time communication backbone, IoT measurement (tide sensors), an AR display server, and a 3D TOF sensor app (WPF).

• Android embedded-device apps — Built for kiosk operation and SIP calling; extended to watch-over / care-robot use.
• Unattended-retail & payment-terminal apps — FeliCa / NFC / credit-card payments / Adyen / Mobile Suica. Signed-APK distribution, alcohol-sales compliance, and more.

• Cloud rendering platform (server side) — Supports Maya / Blender / Arnold / V-Ray / ProRender. AWS S3 integration, distributed rendering, a CLI edition, and GPU-type / server-count selection, developed continuously.

• Local-5G coverage-calculation app — Coverage computation and map rendering using ITU-R P.526 / F.1336 and GSI DEM / PLATEAU. Generates existing-coverage areas from license data to visualize interference (GPU-accelerated).
• LTE / 5G(NSA) drive-test measurement system — Kotlin / Chaquopy / Python / FastAPI / Leaflet. Qualcomm diagnostic logs, RM520N-GL + Raspberry Pi 4B.

• Property-information management app for real estate — Property management, automated portal entry, and automatic selection/generation of contract templates. Roughly 34,000 lines with 167 unit tests. .NET 8 / EF Core / WebView2 / GPT-4o.
• License-authentication platform — Server + resident service + embedded library + admin console. Blazor Server / ASP.NET Core Identity / RSA-2048・SHA-256 / obfuscation for tamper resistance.
• FPGA update and host-control software for a high-speed A/D board — 200 MSPS support. Register control (ADS5295 / LMK04610, etc.), DDR3・FIFO capture, and a waveform viewer (with bin→CSV conversion).
• Mail-distribution & contact-list tools, and cross-site data-collection tools (WebView2 scraping).

• PWA for field/visiting staff (Blazor / PWA / Push Notification), plus backend and CRM development and improvements.

• ERC token issuance with a portal (Ethereum / geth / smart contracts) and exchange-API trading bots (Python / BitMEX, etc.).

• Languages: C# / C・C++ / Python / Kotlin・Java / JavaScript
• .NET: WPF・WinForms / ASP.NET Core / Blazor / EF Core
• Cloud & Infra: AWS (S3・Lambda・WAF) / Azure (App Service・DevOps)
• Data: SQL Server / SQLite / LiteDB
• Domain: MPEG2-TS・ARIB / HLS / LiDAR & point clouds (LAS・LAZ) / FeliCa・NFC・payments / SignalR / MQTT / ITU-R radio propagation

I have spent many years in R&D across broadcasting and telecommunications, including the operation of broadcast and information systems and hands-on security operations covering conditional-access systems (CAS). Today's software work builds on that foundation in hardware, communications, and security.