Mark Tempest

I love taking an idea and making it real.

Twenty-six years of it, in various forms — other people’s infrastructure, then digital products, then running teams and shaping marketing strategies. What’s changed lately is the distance between an idea and a working version of it. Things that would once have needed a team can now start with one person, so I’ve gone back to building.

Rocket Rush2026Live

An experimental computer game built with my son

Rocket Rush is an experiment: can I build a computer game and host it on Cloudflare to learn some of the basics of how games are made? I tried to get in some retro vibes with the music.

Play Rocket Rush ↗

Vault2026Private

A private knowledge engine that reads more than I do.

Vault takes hundreds of YouTube channels, podcasts and news sources, and extracts signals, metrics, events, predictions, claims and causes into a growing vectorized context knowledge base. Agents can then query this context via MCP.

Videos / hour
600
extractions / day
50,000
traceked entities
14,939
  1. Sources
  2. Signals, events, claims, causes, predictions, metrics
  3. Forecasts, knowledge, context
  4. API / MCP

Everything it reads ends up as something it can be asked about.

Northstar2026Private

A personal finance portfolio system

Northstar is the personal finance system I wanted but couldn’t find. It brings my portfolios, market data, earnings and daily financial news into one place, then adds long-term forecasting and AI-powered research on top. Much better than using Google Sheets.

year monte carlo forecasting
20
years of stock history
10
news sources
30
  1. Earnings
  2. Scrape
  3. LLM Extraction
  4. Nominalization
  5. Visualization

The asset knowledge flywheel

Canada Momentum2025Live

Tracking the Canadian Trade Realignment

Canada Momentum is a live visual publication that follows Canada’s changing trade relationships and measures economic strength. Built on Statistics Canada data, it updates automatically and lets the numbers show whether post-Rupture Canada is becoming more diversified, more resilient, and ultimately stronger.

canadamomentum.ca ↗

Spring Hockey2026Live

There wasn’t a hub for spring hockey, so I built one.

There’s a lot of spring hockey out there, but no single place that brings it all together. It seemed like a good rainy day project, so I built a searchable directory of teams, tournaments and programs across Canada.

Spring Hockey ↗

Spring Hockey Directory
Springhockey.ca

The Index

Things I’ve built, launched, run or had a hand in, newest first.

  1. 2026Live ↗2026SpringHockey(see above)Live ↗
  2. 2026Live ↗2026Rocket Rush(see above)Live ↗
  3. 2026Private2026ResourceStaff allocation, time off, retainers and delivery forecasting in one system.Private
  4. 2026Private2026Northstar(see above)Private
  5. 2026Private2026VaultPrivate knowledge engine turning source material into signals, claims, predictions and forecasts.Private
  6. 2025Live ↗2025Canada Momentum(see above)Live ↗
  7. 2025Private2025ArgussAn experimental system to watch security cameras, analyze what happened and alert.Private
  8. 2025Live ↗2025Urban HideawayIndependent vacation rental site with live availability and booking integration.Live ↗
  9. 2012Gone2012A dynamic Bitcoin Infographic for a large FX CompanyPitched the idea and built it - if only I had bought some BTC back then too.Gone
  10. 2009Gone2009Surf forecast engineBuilt a Surf forecasting engine that took public weather data and computed exact swells animations for 100+ global surf spots.Gone
  11. 2008Gone2008Video-sharing iPhone appShipped a video sharing iPhone appGone
  12. 2007Gone2007Built a video sharing portal for action sportsPioneer in the online video space - building players, embed network, advertising and revenue - before Google bought YouTube.Gone
  13. 2007Gone2007Digital products for Vans, Nike, Ford, Xbox and Red BullBuilt microsite / digital products for work clientsGone
  14. 2006Gone2006Built a network of 22 online brandsAnd grew their audience to over 6 million customers.Gone
  15. 2004Gone2004Built computer networks for media companiesFirewalls, servers and systemsGone
  16. 2000Gone2000Managed other people's web serversClient infrastructure, back when a server was a physical object you could kick.Gone