Ask HN: Companies of one, what is your tech stack?

I'm wondering how you all ensure business continuity. To not highjack this discussion I posted a new Ask HN at https://news.ycombinator.com/item?id=32960255, I hope you can share your experience there

I run https://text-generator.io competing with OpenAI. I used to use kubernetes on Google cloud, but now run it from my house behind a CloudFlare tunnel believe it or not Using my own GPUs allows me to undercut them with around 10x cheaper pricing.

The product is built with some open source and some retrained models, it analyses input links or linked images with tesseract/unified IO / OFA / beautiful soup so it can answer questions about images/receipts etc.

The site itself is on app engine standard python with stripe/firebase UI for auth, which is running very cost effectively.

In future in planning to layer on more content understanding eg audio with whisper etc, then milvus/haystack for lookup phases for more factual question answering, then some work on automated retraining and regeneration etc for hard cases, then searching other systems/internal code and logic execution etc, eventually with a few more steps I'm hoping it will feel like I made AGI in a rack in my house lol...

Rails (6.1), Postgres, Redis, Sidekiq

Hosted on Heroku, using Sentry for error tracking, New Relic for performance monitoring, Sendgrid for email. Recently ditched Google Analytics in favor of Plausible for general analytics and Ahoy (Rails middleware) for deeper in-house analytics. Using Intercom for support/chat widget, but planning to switch to Chatwoot. Considering moving off Heroku, but the most obvious contender, Render, doesn't yet have high availability postgres with automatic failover.

Deployment is set up so any push to the master branch on GitHub is automatically deployed to production. Merging to the master branch can only be done via a PR, and needs green status from both linter (Rubocop), tests (Rspec run on CircleCI, both unit and integration) and coverage (100% test coverage required, verified by codecov.io).

UI is Bootstrap (but feeling long in the tooth), and server side rendering with a sprinkling of javascript. Still mulling over hotwire/turbo vs alpine vs stimulus vs react for some upcoming UI that requires more interactivity.

Technically I'm in a company of 50 plus but as the sole dev I think I might qualify.

E-commerce is Noopcommerce.

New stack is the SAFE stack with postgress as the db. Flyway for database migration. Docker deployments with a gitlab CI pipeline.

Soon to add Apache Kafka for message flow.

Initial development with this stack is not especially fast but bug fixes and changes are so easy.

Have a very similar setup to yourself. I'd recommend ECS using RDS for postgres. Code pipeline for building. I find it very seamless and a hell of a lot cheaper than heroku.