Platform engineer · AWS Community Builder · Wellington
Platforms, automation, and the notes I wish I'd had.
I'm John Ajera, a platform engineer at Earth Sciences New Zealand (GeoNet). I build developer platforms and reusable infrastructure - and write up the parts that took me too long to work out.
Labs and walkthroughs
All guidesnetworking
ACM public vs Private CA for intranet TLS
Side-by-side ACM public HTTPS on an internet ALB and AWS Private CA on an internal ALB, with Linux trust installed via S3 and SSM.
acmiot
Greengrass V2 edge greenhouse
Greengrass V2 on a NUC core with ESP32-S3 zones — LAN closed loop first, then AWS CLI wiring for archive, alarms, cloud commands, and on-device ONNX.
greengrassiot
Heltec V4 MeshCore first setup
Flash a Heltec WiFi LoRa 32 V4 with MeshCore Companion Bluetooth — bootloader, web flasher, radio preset, then pair the app.
meshcoreRecent writing
All posts on Dev.togoogleanalytics
Embed a public GA4 dashboard with Looker Studio
Connect Looker Studio to GA4, share Public Viewer, copy the embed URL, iframe it on /stats.
ga4aws
Connect your phone to Kiro Crew (Windows)
Part 2: Crew Connect your phone with Tailscale Serve—PC setup, HTTPS certs, then Tailscale on the phone and the Crew sign-in QR.
kiroaws
Install Kiro Crew on Windows
Download the signed Kiro Crew Setup.exe on Windows, install Kiro CLI, sign in with Builder ID, and open the dashboard.
kiroApps
All projectsCommunity
AWS Community Builder in Network and Content Delivery. Web Admin Lead for AWS User Group Aotearoa.
Organising committee for AWS Community Day Aotearoa and AWS Community Day Oceania (Virtual). AWS UG Leader - Wellington, NZ.
- Speaker - VPC Lattice, Community Day Aotearoa 2025
- Speaker - Amazon Q, Wellington Chapter 2025
- Predator Free NZ - Manawa Karioi Reserve