A picture from Mozilla Festival 2014. All participants are in a circle.

Hello.

I'm Errietta Kostala and I'm a full stack developer...

with a passion.

Learn more


Ever since I was a teenager, I knew I wanted to be involved in programming. I spent countless hours working on my own projects, learning more and more and becoming more and more fascinated.

As I started getting involved in freenode, Mozilla, and other open source projects, it became a way to be part of a community - I could network, make friends, and meet people that would be with me for the rest of my life.

It then became clear to me - I didn't just want to follow my passion of programming. I wanted to teach others what I knew. And I wanted to keep supporting Open Source projects and helping others.

For this reason, I studied Web Technologies at the University of Huddersfield - so that I can learn even more about what I'm passionate for, and I did an internship for Shadowcat Systems - a small company in Lancaster that holds open source and community projects very dearly.

I'm an ex-employee of FairFX (or as I call it FairF-eX) and I currently work as a software developer for Zoopla , and I still spend a lot of my time on community projects.

Do you want to learn more about me? Check out my projects or my blog .

Latest blog posts

ENOUGH with the burndown charts!

I heard about a team being asked to provide burndown charts in their demos to stakeholders. My first reaction was: why!? In this blog post, I’m going to try to articulate why I believe burndown charts are often meaningless at best and harmful at worst, and why even if they … Continue reading

Introduction to the fastapi python framework

I have been working on a new python-based API recently, and on a colleague’s suggestion we decided to use fastapi as our framework. Fastapi is a python-based framework which encourages documentation using Pydantic and OpenAPI (formerly Swagger), fast development and deployment with Docker, and easy tests thanks to the Starlette … Continue reading

Build APIs with node, Lambda & Serverless

This is a talk I did at London Node User Group on January 23rd, 2019. You can watch the talk below or on youtube.

Testimonials

I have a sneaking suspicion this woman is going to be scary good in a few years.

Matt Trout, Shadowcat Systems Technical Director.

We get a lot of contributors but it is not every day someone so seamlessly integrates with the entire team. I went away on vacation and when I came back Errietta was an integral part of our work environment – a powerful presence on IRC, at our video demo call and on GitHub.

Cassie McDaniel, Webmaker UX Lead

Errietta has all the qualities of a great web developer — she learns quickly, values feedback from both engineers and designers, and cares deeply about sharing her knowledge with others. I'm always impressed by how quickly she's willing to jump into a new code base and effectively solve problems.

Kate Hudson, Webmaker Developer