All posts by Jure

CC Balazs Sprenc -

Ljubljana Tech Community – We have a problem

Let’s be honest – our tech community is slowing down. We’re organizing less meetups than in previous years. Without them, we’re losing the culture of sharing. While everyone focused on entrepreneurship and startups, we took engineers and developers for granted. This means that we now have less senior developers available, than a few years ago. Good ones are not working for local companies anymore. So who trains the novice developers?

This will be a problem, for many different groups of people.

Developers need to talk to other developers

We’re not challenging each other with new approaches and ideas. Reading on the internet about some new tech, is not enough. You want to have a a discussion with a person that just implemented it. Building on experience of your peers, is the best way to kickstart the project.

Technical leads need success stories

Nobody wants to be the first to try something new. So seeing smaller success stories, makes it easier to start your own. You can also contribute to a small niche of consulting and training. If your company starts to invest into one technology, more people will join you. That way you’ll have access to extra talent, if you need it.

Entrepreneurs need their developers to be able to teach

Great tech companies brag about their solutions. Not the CEOs, but their developers. Every chance they have, they’ll talk about hard problems and how to solve them. In a world, where we keep producing CRUD applications, it’s hard to find novelty.

But that only happens if the company encourages them. First they have too see their CTO’s and lead developer give talks. Sponsor event and host them at their offices. Once you have good role models in place, it’s much easier for everyone. They have to encourage and give space to younger ones, so they can practice. It also means that they recognize that learning goes both ways.

This has an added side effect, that makes it easier to recruit new developers.

OK, enough problems – what are the solutions?

Easy way – send everyone to conferences abroad. There are many excellent conferences around Europe, any many of us are there. But it’s often the same people. The same people that already  give talks and organize events. It’s also likely that they’re not working for a local company. Distributed companies are not picky where their developers live.

It’s also rather expensive.

So that leaves us with the hard solution. I checked the stats of a few different meetup groups. Most of them seem to do 2 – 3 meetups per year. Looking at speakers, they come from a small group of developers.

That’s troubling, because it leads to burnout and lack of new ideas. There is only so much you can learn in a year.

To make this work, we need to inspect the building blocks of a good community. We already have shared interests in different technologies. We wouldn’t be visiting these events otherwise.

What we need to figure out

1. How do we get more people to organize events? Can we encourage small group of people to take care of certain domain. That way the pressure is not on the individual.

2. How do we find new IT companies. Slovenian IT sector is larger than the 5 startups we see everywhere. It’s good to see them paying it forward, but what about the others? If you look at all the companies that are hiring – why are they not present? Why don’t we see CTOs from marketing agencies talk and sponsor?

3. What kind of support do they need? It a problem to find a space, make announcements or something else? Can we build a network of individuals that can help out. That way we don’t need to negotiate about the space every single time.

4. What else? Is it something more simple – like just having a set schedule and following it?

When I wrote the description of local WebCamp, it was simple. We’re doing this event, because that’s the kind of community we want. I believe having active meetup scene, follows the same ideals.

But it’s an issue that is bigger than any individual. We need to recognize that it’s a problem and start doing something. Not just organizing events, but getting more allies on our side. Teach business and marketing professional the importance of tech community.

We need to make sure, that we’re building the community that we want.

Jeff Kubina -

How to Super Charge your WordPress with Microservices

Confession: I’m amazed at the authoring experience that WordPress provides. Users are productive from the first hour and UI doesn’t get in their way. The story is similar for developers, if you stay inside the world of theme development. Try to do anymore complex and with tests, and it gets complicated. That is where (micro)service oriented architecture can help us.

At the Open Education Consortium, we use a mix of all the different approaches.

1. Let the WordPress call external API’s


At OEC, we provide functionality of Course search. While I could build it inside WordPress, it wouldn’t be optimal. I’ve developed it in Django with REST Framework. We get API Documentation for free and our Main WordPress site is using the same calls as everyone else.

To call an external API, you’ll need to extend template_redirect, init,
and query_vars actions and filters.

This way, you can format output inside your WordPress theme.

2. Let the Javascript call external API’s


This is not strictly WordPress, but it solves the other half of the problems you might have. If you don’t need to have output visible to Search Engines, you can render it with JavaScript. In one example, we’re showing a map of where our members are. We have a separate portal, where members can edit their contact information.

On WordPress side, Leaflet library calls the GeoJSON endpoint and displays it on the map. The data is always up to date and we’re using the best tool for the job.
This portal then exposes GeoJSON API, that Leaflet then displays.

3. Embed your WordPress output


For our Directory feature, I needed a flexible membership system. I ended writing it in Django with Solr. Django provides powerful form editing, that I didn’t want to replicate inside WordPress.

What I ended doing, is that I exposed API from WordPress with header and footer HTML. That way Django can just include 3rd party content. It also simplifies keeping the themes in sync.

I could do it using iframes, but then I would have problems with urls and the size of iframe content.

There is also a possibility for a future upgrade. Because we’re running on the same domain, we can read cookies from WordPress. This would allow us to check if user is logged into WP Dashboard and elevate their privilages inside Django app.


Modern Web applications are moving away from monolithic, one size fits all, solutions. While it’s common to see such infrastructure in the backend, it’s time that we start embracing it also on user facing sites. I wish some of the infrastructure inside WordPress, would make it easier, but I guess that’s an opportunity for a new library.

PolyConf 2015

Notes from PolyConf 2015 – Conference for developers who code in multiple languages

As developer, I feel that I work inside my technology bubble. I keep using the same tools. Because of this, it takes a lot of effort to learn new development paradigms and languages.
PolyConf was a small conference, less than 300 people in beautiful Poznan, Poland. The breadth of content, participants and organisation made it stand out.

I’ve made some notes on the impressions, that the talks and discussion provided.

Types and Immutable data structures.

Most of the talks were building on top of functional programming paradigms. There are clear benefit of that approach, as we move towards multi-core, distributed computing. I can’t wait to see some of these concept in upcoming Python 3 releases.

In this regard, Facebook’s Flow provides alternative to types in JavaScript. This has benefits over writing your code into TypeScript or ClojureScript.

Language for Every Problem

As we’ve seen in Python community – change is hard. That is why development is happening in new languages. Some decide to build whole ecosystem, while others compile to a common VM or language.

Two of the presented languages – Crystal and Elixir, were both influenced by Ruby. I would like to understand, what is about Ruby syntax that makes it a good basis for language development.

New languages also come with new frameworks. Phoenix for Elixir is one of them. A scalable web framework, that is using streams to keep processes separated and get speed benefits. A year ago, I would be skeptical about using new web framework. But with microservices and Single Page Apps, it looks like there is opportunity to experiment. We’ve offloaded most of the representation and business logic to clients.

Lots of Practical Advice

One of the benefits of being a polyglot is so you can use official libraries. A lot of good things are happening on JVM stack that we can’t just ignore.

Beware of defaults – they are usually not optimal for your use case.

The main benefit if knowing lots of languages, is to be able to borrow different concepts. If you want to explore different concepts, consider:

Data Science

Jupyter Notebook with Pandas looks like the new default for starting with data analysis. Continuum Analytics are sponsoring a powerful ecosystem. I’ve learned that there is a library called PySpark, that introduces out-of-cpu computing supports. This allows Pandas to scale even better.
The demo of Julia language showed power of implicit types and great things they can do for science computing. Worth checking out, especially now that it Juypter supports it.

But wait, there’s more

  • Racket – A programmable programming language
  • miniKanren – embedded Domain Specific Language for logic programming.
  • Emojilisp – because, why not.


I went to the conference without any expectations. For most part I assumed it will be way too complicated for me. But I met a group of passionate people, that were happy to explain in simple words why they love the the languages they work in.

We should figure out how to bring such levels of discussion and participation to our other events.

PolyConf 2016 is already on my conference list for the next year.


How to approach learning new Framework and not get overwhelmed

It’s that time of year where everything old is new again. JavaScript is the hottest kid on the block and it is time to update my approach to writing complex Web Applications. Django and WordPress are fine, but they are safe choices that do most of the computation on the server. What I want to learn is, if it’s easier to make Single Page Applications.

After I realized last year that Angular 1, does not work for me – I decided to give Ember.js a try. Their web site resonated with me. It tells a story of community driven framework. It felt like Django, but with JavaScript. It’s also a huge framework that felt overwhelming the first I tried to follow their official tutorial. It also does not help that they are in a middle big transition to a major 2.x release.

After not making much progress in first two days, I have decided to change my approach. I opted for a complete submersion into Ember.js community.

There are several steps and mistakes I made along the way:

  • First mistake was trying to build a new app, while learning fundamentals. Too many new things and wrong assumptions on my part.
  • I stopped reading about fundamentals from tutorials on blogs. They’re just too short for someone without prior experience to understand what’s going on.
  • I bought a book – (Ember Cli 101) and forced myself to do all the examples in book. By typing them out – no copy/pasting. As Kathy Sierra tells us, we learn best when we write good examples of code.
  • Writing the code (and making mistakes) helped me learn ecosystem. It’s also a good practice in how to use build-in debugging tools, what do coding errors look like and how to fix them.
  • I started listening to podcasts with Core Team members. They provide a general overview of ideas that are usually skipped at technical talks.
  • I started listening to talks given at different (Ember) conferences in the last year. It helped me understand the terminology and the technical challenges that community is facing. They’re also great source of inspiration for the kind of apps, that people are building.
  • I started lurking on official IRC channel. It turns out, that if you read Q/A that goes in there, you’ll learn answers for problems you don’t have yet. That way it’s easier to identify later.
  • I’ve started to follow the discussion forums. It’s a good way to see longer discussions on common topics.
  • I’m starting to read different bug reports and RFC’s in Github.

All these activities are happening in parallel. After a week, I now know how to read the documentation and how to solve issues. I also understand what to watch out for and rough roadmap for the framework. I have yet to write my first app from scratch, but now I have example app that I can borrow code from.

To make it easier for other developers that are coming to Ember.js ecosystem, I’ve started documenting my journey as I Learn Ember.js.

So that was first 30 hours of deliberate practice with Ember.js. Several hundred to go.