Modern Tech
No Fuss
Systems That Last
With 11 years on GCP plus AWS, Azure, Cloudflare, and Akamai, I specialize in cloud system development. Backend, API, infrastructure automation, data platform × LLM integration — designed, built, and delivered end-to-end by one engineer.
One Person, Like a Team
loFT LLC is a technology-focused company run solely by Koushuu Matsubara. Founded as a sole proprietorship in 2014 and incorporated in 2019. From requirements gathering through design, implementation, infrastructure provisioning, and operations — all handled in-house with no outsourcing. This prevents the common issue in large organizations where design intent is lost in operations, maintaining consistency while enabling continuous improvement. I have supported diverse companies’ cloud systems in a hands-on, one-on-one partnership model. Especially with startups, I’ve driven design, development, and operations with fast decision-making and unwavering design intent.
Founded / Location
2014 (incorporated 2019) · Musashino, Tokyo
Specialization
Cloud infra, AI/LLM platforms, full-stack development, DevOps
2026 Focus — LLM Infrastructure R&D
Experiencing the potential of open-source models in local environments, I’m focusing on LLM infrastructure research and development.
Research Infrastructure
Built an on-premise high-performance computing environment with AMD EPYC 9175F and RTX PRO 6000 (96GB×2). Designing, building, and validating quantization, multi-model inference, AI data pipelines, and modern data stack infrastructure.
System & Tool Development
Focused on building systems and tools for local LLM use cases — inference optimization, MCP tools (Rust), data pipeline integration — advancing local development infrastructure.
Contract Development
Taking on projects in system/service design, full-stack development, data platforms, multi-LLM integration, RAG systems, inquiry and internal knowledge chatbots (open-source LLMs), application development for AI model productization and cloud infrastructure, and GPU analytics infrastructure design and build.
Strengths
Because I handle everything from design to implementation, decisions are fast and design intent stays consistent.
11 Years of GCP Cloud Architecture
Building on Google Cloud Platform since 2015 — GKE / Cloud Run / Firebase for core infrastructure. Multi-cloud and edge configurations including AWS, Azure, Cloudflare, and Akamai with container-based microservice design.
Full-Stack Execution That Moves Products Forward
From UI design (Figma) to frontend (React/Vue/SolidJS) and backend (Go/Python/Rust) — all end-to-end. Since technology selection and implementation are the same person, spec changes are tracked quickly.
Technology Selection Driven by Requirements
Working across Python/Go/Rust/TypeScript/Dart and many more languages, selecting the optimal language and architecture for each requirement.
Reproducible Operations with DevOps / IaC
Designing deployment and configuration automation on Kubernetes / Podman containers. Observability built in from the start with Prometheus + Grafana + Loki. Most services I’ve supported are microservice-based, with operations designed to fit each team.
LLM/AI Infrastructure Design & Validation (On-Prem GPU)
Continuously validating open-source large language models and datasets from Hugging Face on our own EPYC 9175F + RTX PRO 6000 (96GB×2) on-premise GPU infrastructure.
Data & Analytics Platforms (Modern Data Stack)
Design and operations experience with PostgreSQL / AlloyDB / Firestore. In-house development of data pipeline and analytics infrastructure with Apache Iceberg + dbt + Trino + Dagster.
Tech Stack
Key technologies used over the years.
Languages
- Python
- Go
- Rust
- TypeScript
- JavaScript
- Dart
- Kotlin
- C#
- awk
- Shell Script
- SQL
- Swift
Frontend / UI
- React
- Vue
- SolidJS
- Next.js
- Nuxt
- Alpine.js
- Tailwind CSS
- Bootstrap
Mobile / Desktop
- Flutter (iOS/Android/Web)
- Tauri (iOS/Android/Web)
- iOS (Swift)
- Android (Kotlin)
Cloud
- GCP (11 years)
- AWS
- Azure
- Cloudflare
- Akamai (Linode)
- Vultr
Containers / OS
- k8s
- Istio
- Docker
- Podman
- Container-Optimized OS
- Ubuntu
- Debian
- CoreOS
- Alpine Linux
Databases / DWH
- PostgreSQL
- MySQL
- Firestore
- MongoDB
- AlloyDB
- DuckDB
- PostGIS
- Postgres-vector
Data Platforms
- Apache Iceberg
- dbt
- Trino
- Dagster
- Nessie
- Lightdash
AI / LLM / ML
- vLLM
- llama.cpp
- ik_llama.cpp
- Ollama
- PyTorch
- TensorFlow
- LoRA
- Qdrant
- ONNX Runtime
GIS / Maps
- MapLibre
- Mapbox
- rust-martin
Observability
- Prometheus
- Grafana
- Loki
- Promtail
- Various exporters
Dev Tools / Ops
- Zed
- VSCode
- Figma
- Gitea
- Git
- Obsidian
- Cloud Build
- Cloud Run Jobs
- Cloud Scheduler
- Terraform
Storage / Backup
- GCS
- S3
- Cloudflare R2
- MinIO