mioi hanaoka she/they

Engineer β€’ SRE β€’ Cloud Infrastructure

πŸ‘‹ About

I build resilient cloud infrastructure that scales. With 19 years of experience, I've gone from being on-call during denial-of-service attacks on LinkedIn's on-premise servers to scaling Slack's cloud-based infrastructure during a global pandemic. Currently, I'm on the ML Infra team responsible for the infrastructure that powers Slack's AI features.

My approach to infrastructure: Build systems that don't wake you up at 3am. I believe in thoughtful automation over quick fixes, observability that tells a story, and code that your future self will thank you for writing.

I take pride in contributing to team culture through mentoring, sharing learnings from production incidents (we all have stories), and giving code reviews that make engineers betterβ€”not just code better.

Technology is 100% guaranteed to fail: One thing I've learned throughout my years in the industry is that bugs, defects, and failures are inevitable. The challenge is building systems that are resilient, reliable, and repeatable.

My approach to system design is security-first, leveraging infrastructure-as-code tools like Terraform for elegant, reproducible deployments. I'm passionate about creating sustainable operations by transforming on-call rotations from reactive firefighting into proactive system stewardship through comprehensive monitoring, intelligent automation, and well-defined SLOs.

Outside of work, you'll find me exploring the Bay Area on my road bike, playing with Cowboy (my cat), or overthinking the optimal way to serve websites for organizations I care about like Lavender Phoenix (lavenderphoenix.org) and Bay Area Transformative Justice Collective (batjc.org).

πŸš€ Current Work

Staff Software Engineer
Slack Technologies
2016-07 β†’ present
πŸ—οΈ Responsible for cloud infrastructure powering Slack, the popular team messaging app
πŸš€ Drove adoption of Terraform platform across the organization
🌐 Contributed to design of Slack's network architecture (Whitecastle) and egress stack
πŸ€– Maintained ML & AI infrastructure that trains and serves models for Slack AI features

πŸ’» Tech Stack

☁️ Cloud & Platforms

AWS GCP Kubernetes Cloud Run DigitalOcean

πŸ› οΈ Infrastructure & Config

Terraform Chef Jenkins Github Actions

πŸ“Š Observability

Prometheus Grafana Logstash

πŸ’» Languages

Go Python Bash Ruby HCL PHP

🌐 Networking & CDN

Cloudflare CloudFront DNSSEC nginx squid

πŸ”§ Databases & Caching

MySQL PostgreSQL Redis Memcache

πŸ“š Experience

Member of Technical Staff
San Francisco, CA
2012-12 β†’ 2016-05
Site Reliability Engineer
Mountain View, CA
2011-02 β†’ 2012-12
Service Engineer
Santa Clara, CA
2008-07 β†’ 2011-02
Site Production Engineer
Oakland, CA
2006-04 β†’ 2008-07

πŸŽ“ Education

Bachelor of Arts, Broadcast and Electronic Communication Arts
1998 β†’ 2002