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In this post I do a deep dive on a database I built ontop of Cloudflare Durable Objects (DOs) and the rest of Cloudflare Developer Platform.

Amazon DynamoDB is one of my favourite databases.

For the past few months I have been backtesting a long-term investing strategy with a friend, and we started following it since 2 months ago.

I have been working a lot with Durable Objects as part of my day job at Cloudflare and have been answering questions on the #durable-objects Discord channel on a daily basis for several months now.

This is a “live” collection of the best Large Language Model (LLM) prompting guides I find online that help me write better prompts and in general get the most value possible out of LLMs.

On 2025-Jan-03, I delivered a talk doing an overview of the Cloudflare Developer Platform in my home-city, Nicosia, Cyprus 🇨🇾.

Table of contents Symmetric encryption Symmetric encryption in Go Data encryption keys Envelope encryption Envelope encryption in Go Envelope encryption with KMS Key rotation Multi-level envelope encryption Conclusion In this article, I will go through the

Table of contents Real world scenario to detect PagerDuty vCard updates Script to detect vCard updates Scheduled runs Hurl is a CLI tool that makes testing and automating HTTP APIs easy and enjoyable.

Table of contents User journey Hurl source Create a new database Ensure freshness Database details Database queries Conclusion As I wrote in a previous post, I love using Hurl to test HTTP JSON APIs.

This is a reference architecture diagram entry I originally published on the Cloudflare Documentation website.

Table of contents Hurl Love letter Conclusion Hurl is a command-line interface tool (CLI) that makes testing and automating HTTP APIs easy and enjoyable.

Table of contents Context Directory structure Systemd Caddy Deploy script Conclusion In this guide I will explain the deployment scripts I have been using for several years now for my own applications deployed on actual servers, either VPS on Hetzner and…

Table of contents Context TiddlyWiki Durable Objects Requirements High-level architecture CreateWiki data flow GetWiki data flow Location hints OK.

Table of contents HTTP Hook Trigger Secret Hurl variables Out of AWS Lambda into Fly.io Response bodies automatically persisted Docs Conclusion and feedback Skybear.NET is a managed platform automating your HTTP API testing using Hurl.dev plain text scrip…

Table of contents Not just for real-time collaboration Workers intro Durable Objects intro Durable Objects and the Actor model Durable Objects use-cases Limitations Pricing Durable Objects vs Workers Conclusion In this article I will showcase Durable Obje…

Table of contents Many definitions Is this… the Worklog?

Table of contents Run types Landing page Business plan Continuous Integration use-case Conclusion and feedback Skybear.NET is a managed platform to automate your HTTP API synthetics testing using Hurl.dev plain text scripts.

Table of contents Full CRUD Hurl 4.3.0 Response outputs Historical script runs Script triggers - Scheduled Cron Conclusion and feedback Skybear.net Scripts is a managed platform to automate your HTTP website and API tests using Hurl.dev scripts.

Table of contents Definitions Applicability and importance Conclusion Definitions What is holistic ownership of a project?

Table of contents Rebranding to skybear.net User accounts Script management Coming very soon Conclusion and feedback Skybear.net Scripts is a managed platform to execute Hurl.dev scripts.

Table of contents Context What I want vs What I offer Usage-based pricing Per-seat - Recurring pricing Conclusion References Pricing for a SaaS, or online digital products in general, is a hot topic for debate.

Hurl Webscripts is a managed platform to execute Hurl.dev scripts.

In many cases I want to check information about the network ports on my system, either to see what is using a specific port, or to see which ports are listening for requests.

Open https://checkip.amazonaws.com/.

Table of contents A.

Table of contents Amazon Profiler Backend Website AWS - Amazon CodeGuru Profiler Waves Environments Pipeline promotions Automatic rollbacks Multiple in-flight versions Conclusion In this article I will go into details of the CI/CD pipelines my team implem…

Table of contents Introduction to the CI/CD flywheel The complete CI/CD flywheel Why do we need CI/CD Business benefits Technical benefits Real world CI/CD Conclusion In this article you will learn what CI/CD is, why you should use it, understand why it c…

Table of contents Context Future me will thank me Onboarding new joiners Asked twice - asked often Conclusion Context what’s your motivation to create such good docs?

I originally sent part of this article to the mailing list of my Elements of CI/CD course, and now sharing it with the rest of you with improvements from the received feedback.

Over the past decade, I have gone through tens of interviews myself as an interviewee at small companies, startups, and Big Tech companies, from junior to Principal level roles.

Problem I want to copy all the contents of a directory (or folder) named source-folder into another directory named destination-folder.

For the past few months I have been working on some side-projects that took way longer than I expected, or initially planned.

Warning: This article is a combination of deep multi-month research, hands-on experience over almost a decade, and ideas, all combined into a nice elaborated ranting.

This article contains my favourite highlights from the Hell Yeah or No book from Derek Sivers.

This article was originally posted as a guest post on Upstash Redis blog.

Check the original Twitter thread at @lambrospetrou/status/1561752140909002757.

Check the original Twitter thread at @lambrospetrou/status/1558819676439945216.

For many years now I have been using an AWS EC2 T3.nano (T2.nano previously) instance as my personal VPS server.

Even though my default and preferred way of deploying applications is #serverless platforms, sometimes I need an actual long-running host.

I love #serverless platforms 🚀 I have used most of the public offerings over the years, and I always keep an eye out for new services.

First things first, this article is not a scientific performance comparison between Kotlin and Go (aka Golang).

As the title implies, this article is about the now ancient tool make [1] [2].

During the past few weeks I have been feeling that I am not as engaged as I want to be at work, and neither at my outside of work activites.

Today, I stumbled upon two articles with some amazing pieces of advice from Kevin Kelly.

Minibri Temp now supports files formatted in Asciidoc.

I often share links to content I read, watch, or listen in my social media accounts (mostly Twitter).

Context I use several domains for my websites and side projects, and for some of them I want to have email addresses that use the correspoding domains, instead of advertising a Gmail address.

Try Minibri Temp at https://temp.minibri.com.

I don’t usually write end-of-year articles, but 2020 was an eventful year. 2020 Look back Early January 2020 I began preparing for job interviews.

Short version I studied for roughly 2 full days, so even if you take it easy one week should be plenty.