Kohsei Nomura

Software Engineer / Site Reliability Engineer

Tokyo, Japan

I love open source.

experience
Woven by Toyota, Inc.Aug 2026 – Oct 2026 (Incoming)

Software Engineer

MIXI, Inc.Mar 2026 - Apr 2026

Site Reliability Engineer

  • Responsible for SRE operations for Monster Strike
DMM.com LLCDec 2025

Software Engineer

  • Improved latency of API endpoints for an in-house ad delivery system.
Blog post ↗
CyberAgent, Inc.Nov 2025

Software Engineer

  • Built a dedicated load testing environment on GKE cluster for ABEMA TV's advertising delivery system.
Blog post ↗
LINE Yahoo CorporationAug 2025 – Oct 2025

Software Engineer

  • Developed new features for LINE NEWS.
WESEEK, Inc.May 2023 – Current

Software Engineer

  • Developed new features and addressed security vulnerabilities for GROWI, an open-source wiki platform.
  • Developed software to manage configuration data and resources for one of Asia's largest internet exchanges.
interests

Tooling

NeovimNix

Infrastructure

KubernetesTerraformDocker

Homelab & OSS

Self-hosted serversOpen source
projects
TypeScriptNext.jsexpress.jsMongoDBOSS
  • Open-source wiki platform. New feature development and security vulnerability remediation for the editor.
TypeScriptNext.jsRuby on RailsDockerKubernetesArgoCD
  • A reading management app to tackle unread tech books. Earn EXP every time you read and visualize your skill growth.
education
Waseda UniversityApr 2023 – Current

B.Eng, Mechanical Engineering

Matsuda Lab

  • Fluid dynamics research using Pressure Sensitive Paints (PSP) for automated leak detection in pressure vessels.
  • Numerical analysis of physical phenomena.
contact