Hi there, I’m Marian Posăceanu. I’ve been building things for the web since Flash was still a reasonable career choice.
You’ll also find my name written as Marian Posaceanu when Romanian diacritics are left out. I’m a multidisciplinary web developer, Ruby is my core programming language, and I spend most of my time working on backend systems, APIs, search, performance, deployment, and developer tooling.
I’ve been building for the web since the early 2000s, starting with Flash and moving through standards-based HTML, CSS, and JavaScript, Java and Spring, PHP and CodeIgniter, and eventually Ruby and Rails.
Today, I work mostly on backend systems: Ruby and Rails applications, HTTP APIs, PostgreSQL, search, performance, deployment, and developer tooling. I still care about the browser side of the web, and over the years I’ve worked with jQuery, Ember, Stimulus, Hotwire, and the wider JavaScript ecosystem as it has evolved.
I enjoy learning new programming languages and borrowing useful ideas from different paradigms. Functional programming has influenced how I think about data and behaviour, but I care more about choosing the right model for a problem than following one particular school of thought.
For me, good software should be understandable, maintainable, well documented, and measured rather than merely assumed to work well. I like investigating how systems behave, reducing complicated problems to smaller experiments, and writing down what I discover.
This site is where I document what I build, investigate, debug, and learn—usually around Ruby, Rails, APIs, search, performance, systems behaviour, and the occasional philosophical or historical detour.
What you’ll find here
- Projects — current work, experiments, reference code, and selected historical projects
- Articles — writing about software development and the web
- Technical investigations — detailed debugging notes, experiments, and systems research
- Ruby gems — libraries and open-source work
A short version
Marian Posăceanu is a multidisciplinary web developer whose core programming language is Ruby. He works primarily with Ruby, Rails, PostgreSQL, HTTP APIs, search, performance, deployment, and developer tooling.
Contact
I’m always happy to hear about interesting Ruby, Rails, search, or performance-related work, as well as thoughtful side projects and writing opportunities. You can reach me at .