Backend systems engineer at 株式会社スカイコム (SkyCom), R&D センター宮崎. C++, C#, and Linux, mostly below the framework line.
My day job is SkyPDF: low-level PDF parsing and cryptographic signing in C++ and C# on RHEL, along with the WebAPI, RPM packaging, and CI/CD wrapped around it. Chasing down a single API bottleneck doubled throughput in production. The My Number Card signing work turned into a patent, filed jointly with SkyCom in 2025.
Outside of that I build automation that has to survive the open internet, which in practice means anti-bot systems and agents that run unattended for hours. Two of those are packaged and public rather than sitting in a private repo, so you can read the source and install them.
Currently on a Japan Engineer visa in Miyazaki, looking for senior or lead backend, platform, or automation work in Tokyo or remote.
| Project | What it is | |
|---|---|---|
| agentic-stealth-browser |  |
Stealth browser automation for autonomous agents, on Playwright. Coherent fingerprints across TLS, navigator, WebGL and Canvas; behaviour simulation; block detection with recovery; an MCP server so agents drive it directly. MIT. |
| GhostScrape | live | The hosted API built on that engine. FastAPI with key auth, usage metering and quota billing, PostgreSQL 16 behind Alembic, rotating proxies, deployed on hardened Linux under systemd and a Cloudflare Tunnel. |
| posix-ipc-dotnet |  |
System V shared memory and semaphores for .NET on Linux. No native payload, just P/Invoke into libc, for low-latency IPC between processes on one host. |
| engram | Memory for coding agents where a private git repo is the store and the audit log. Every fact is an attributed, revertible commit; no database, no service. Session hooks sync it across machines. | |
| ats-resume-analyzer | Scores a CV the way an applicant tracking system would: keyword matching, skill-gap detection, targeted rewrites. | |
| SkyPDF | proprietary | The day job. C++/C# PDF and signing infrastructure on RHEL, running in enterprise document workflows. |
Smaller things that might be useful: rpm-package (RPM packaging reference), tunnelfox, oci-defender, ValidationEngine, StructProbe.
株式会社スカイコム (SkyCom Corporation) — Software Engineer II → I · 2022 – present · Miyazaki, Japan
Core developer on SkyPDF, the low-level PDF library and cryptographic signing infrastructure, in C++ and C# on RHEL. Designed the WebAPI surface for signing, rendering and conversion. Built the RPM packaging and CI/CD pipeline. Resolved a critical API bottleneck for a 2× throughput gain in production, and filed JP 2025-169170 A on electronic signatures using the My Number Card. Promoted to Grade I in April 2026.
Ferntech Solutions — Software Architect & Project Manager · 2019 – 2021 · Bangladesh
Architected AIW Core, a hyper-automation platform deployed to major banks, then built the automation studio over it for desktop (Electron) and web against one shared engine. Led a five-person team through the full delivery lifecycle.
Neonsofts — Co-founder & Lead Developer · 2014 – 2017 · Bangladesh
Started it while at BRAC University. ERP systems and Unity3D game prototypes for clients.
Patent · JP 2025-169170 A — Electronic signature system using the My Number Card. Japan Patent Office, filed 2025 with 株式会社スカイコム.
Publications · Alzheimer's prediction via CNN on OCT retinal images (IEEE, 2019) · Arduino crop and fertilizer recommendation system (East West University Journal, 2018)
Hackathon · 1st place, National Hackathon, IDEB Bangladesh (2014)
Systems C++ · C# / .NET Core · RHEL · systemd · RPM · P/Invoke · Docker
Backend FastAPI · Node.js · PostgreSQL · Redis · SQLite · REST
Automation & AI Playwright · MCP · autonomous agents · multi-agent orchestration · NLP
Also Python · TypeScript · React · Bash · GitHub Actions
BSc Computer Science · BRAC University, Dhaka · 2013 – 2019
B-JET Advanced Course · University of Miyazaki · 2021 – 2022
Microsoft Student Partner · 2013 – 2016