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Jessie Heald

@JessieHealdUK@defcon.social
mastodon 4.7.3
  • Open on defcon.social

A full stack web developer with a drive for FOSS and building an accessible #IndieWeb. #11ty evangelist and developer of #11tyCMS .

46 Followers
47 Following
27 Posts
Joined January 28, 2026
Portfolio:
https://jessieheald.com
Codeberg:
https://codeberg.org/JessieHealdUK
Country:
United Kingdom
Pronouns:
they/she
Header alt:
2 purple waves overlapping each other, the one in the foreground has a light purple to darker purple gradient going downward. Above the waves is a deep dark purple, with tiny grey dots that look like stars cast across.
Avatar alt:
A white background with the initials: J H, beneath them a purple wave with a light purple to dark purple gradient.
About me:
Backed by 15 years of experience and a drive for UX, I lead development of backend APIs and craft React frontends. From developing core microservices to refactoring products for sustainable growth, I deliver products customers can depend on.
Open post
Jessie Heald @JessieHealdUK@defcon.social
· 7mo ago
Static websites are the future. Not every site needs to be dynamically generated. Having a #blog served by a complex CMS like WordPress feels unnecessary after using #11ty . Compute is growing in cost and becoming scarce. Why waste it on sites suited for static generation? Plus, who wants to host a server with a database, a CMS, a bunch of plugins and all the security headaches that comes with it? #SSG #IndieWeb #Blogging
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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 8mo ago

I'm SO proud of how dark mode looks on my portfolio 🤩 . And even happier with #11ty for making my portfolio possible. #SSG s are the future, I'm sure of it! #WebDesign #WebDevelopment

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DEF CON Social

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 4mo ago

AI Generated #Safari extensions? What could possibly go wrong 🙄 #WWDC #NoAI

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 4mo ago

The fun thing about learning a new language that's in its infancy is using change logs as documentation #Zig #Programming

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 5mo ago

Does anyone know of any #FOSS or open web adjacent conferences in the #UK this year that are looking for people to give talks? I'd love to do a talk about my #11tyCMS project! #Programming boosts welcome!

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 5mo ago

Ever wanted to inject your own HTML into the markdown rendering of your 11ty posts? Me too! I wrote a post about it:
https://jessieheald.com/blog/adding-custom-rendering-to-html-elements-in-11ty/

#IndieWeb #11ty #SSG #JavaScript #Markdown #programming

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 6mo ago

I'm tired of what AI is doing to the internet and software. I'm tired of the resource scarcity, and I'm sad about the negative impact of LLMs on the #programming field and the art of development, as well as the effects its having on our #environment .

What if #GreenCoding could not only insulate our projects from the negative effects of AI, but also reduce operational costs and improve UX? My blog post talks about all of this and more, check it out!

Boosts and feedback appreciated!

https://jessieheald.com/blog/saving-the-planet-and-your-ux-with-green-dev/

#NoAI

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 6mo ago

God I love #TypeScript . Its so beautiful how all your code comes together when using it. Sure it can slow you down to begin with, you have to think so much harder about everything you write. But it pays off: bugs become infrequent and things feel a lot more stable!

It's been a while since I've coded in TS, and I'm glad to be getting back into it again. Didn't realise what I was missing.

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DEF CON Social

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 7mo ago

I did a Google search earlier on eco friendly coding... And got results from #LLM written posts 🤦‍♀️ . Sigh. #Programming #Green

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 7mo ago

Does anyone know of any #FullStack JavaScript roles? Looking to #GetFediHired #jobs #programming . Boosts appreciated <3 .

I'm fluent in JavaScript and TypeScript, with over 8 years experience in React and Node.JS, and a drive for UX and sustainable growth.

My recent achievements include:

- Building and integrating a web to PDF microservice, which is daily by clients to enable their public infrastructure meetings
- Reducing vendor lock-in and improving quest latency by 10% by developing a custom Express RESTful API, and leading the migration from Firebase.
- Building a local first, truly serverless CMS for the static site generator: 11ty (11tyCMS!)
- Reducing deployment downtime by 80% by implementing my GitHub Actions powered CI/CD pipeline and providing training for the dev team

If there's any leads on WfH jobs, I would appreciate them! See my portfolio for more: https://jessieheald.com

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 6mo ago

RE: @knoppix95@mastodon.social

This is why #OfflineFirst software is vital

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 4mo ago

In my capacity as #11ty / #BuildAwesome evangelist, I wrote a post about why I'm obsessed with #SSG s:
https://jessieheald.com/blog/the-static-web-renaissance/ #Blog #Programming #WebDev

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DEF CON Social

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 6mo ago
Replying to
@bkuhn Do you think that it _could_ burst in the near term, though? All this compute is absurdly expensive for something that doesn't provide the value it claims.
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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 7mo ago
Replying to
@shellsharks it’s an honor! Awesome work, really enjoyed reading it ☺️
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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 6mo ago

Does anyone have any good resources or lists of resources for #OfflineFirst development? #Programming

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 6mo ago

It's been a while since I've used #TanStack Query but it's SO nice. Integrating it into Calcifer 👀 #CalciferDev

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 7mo ago

Did some more work on Calcifer today... Got the nested document rendering working nicely 😎. Very proud of how this is turning out! #CalciferDev #Programming

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 7mo ago

Any advice on #FOSS fundraising welcome!

I'm looking to setup some donation pages for my FOSS #11tyCMS project. I've looked at Open Collective and Buy Me a Coffee. Buy Me a Coffee looks like the most sensible right now: 11tyCMS's user base is tiny (for now), and it feels like any donations will likely be one offs.

Are there any platforms I should be aware of? I have also thought of Patreon but I think it might be best to wait until I have a better website for 11tyCMS, and more advertising and outreach. #programming

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 3mo ago

https://jessieheald.com/blog/the-llm-driven-death-of-stack-overflow/ I wrote a post about the death of #StackOverflow , the impact of #LLM s and #AI on learning to code. I'm starting to worry that the internet is becoming an information desert for juniors. #Programming

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 3mo ago

Making a little site to make sharing to #Mastodon a little easier.

My portfolio is Javascriptless, and I wanted to keep it that way. So thought it'd be nice to create a web app that could generate share links for Mastodon and remember your instance(s).

All you have to do is link to it with the right search params.

More on #Mastoshare soon!

#Programming

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 3mo ago

Got a quick weekend project on the go. This time using #Preact which is quite fun! Keeping my dependencies and bundle sizes to a minimum! #Programming

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 4mo ago

It's concerning that many companies use AI for their hiring process. I asked a chatbot about my portfolio, and it hallucinated several skills I didn't have and missed several crucial skills I _do_ have.

Imagine the havoc that's reeking on job applications right now? The whole point of these systems is that a human can be taken out of the equation. What's the point if we still end up reviewing it because the AI can't be trusted? #AI #NoAI #Programming #Jobs

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DEF CON Social

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 4mo ago

For the junior developers out there: would 1 to 1 lessons from a senior developer be helpful for you in today’s climate with AI? I’m curious… #programming boosts welcome 💖

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 4mo ago

Does anyone know of good UI libraries for #Zig ? I'm interested in building a project soon, and thinking of using Zig to do it! I know of a few, but any _recommendations_ would be welcome! #Programming

I suppose there's nothing stopping me from using a C library for that either...

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 5mo ago

I LOVE interoperability. There's something so cool about coding something that's flexible enough to work across multiple platforms. So excited to see what I can turn Calcifer into. Right now it supports Firebase, but the code is designed to be platform agnostic, so platforms like Supabase would be super easy to integrate! #CalciferDev

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 5mo ago

the insatiable urge to develop an #11ty plugin #programming

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DEF CON Social

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Open post
Jessie Heald @JessieHealdUK@defcon.social
· 4mo ago
Replying to
@kris@todon.eu Sounds like its quite customisable. Might give it a shot.
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