Which programming language and technologies should you learn in 2021?

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It’s 2021 and if you’re looking to learn a new programming language, DevOps tool, public cloud, or infrastructure items, the big question is which one to go for? Here are my picks on where to invest your time and energy.

This article was inspired from a pre-Christmas catch-up with a good friend and former colleague who spoke about his love for tech but wondered where he should put his time if he’s to learn new things in 2021. Those who have been in the industry for some time have seen no end of changes.

Once it was pretty simple; C and C++ were the programming languages to learn, with UNIX an established enterprise operating system and Windows an emerging contender. Pascal was being taught, which led to Delphi before Java emerged with its built-in memory management. The Internet, once a secret of military and education, exploded in reach and popularity bringing with it JavaScript – a naming choice seeking to leverage the Java brand despite having no connection. Microsoft’s .NET hit the scene bringing a new way of developing Windows Forms apps before WinForms became passe as XAML evolved. Now the web is the application delivery platform of choice, operating systems are largely irrelevant, and public clouds bring infrastructure to the masses with low barriers to entry. DevOps – the application of programming disciplines to infrastructure assets – is serious business, as is data and analytics.



There have been technologies that have almost disappeared. Adobe Flash, once beloved for online learning, animations and online games – even, curiously, a dental practice management system – is in its last days. We could list tech after tech that has similarly disappeared; good technologies which advanced the field at the time but are now relics of the past and which the newest generation of IT professionals have no interest in taking up, choosing to work on the cutting edge instead of supporting aged and legacy products.

Of course, it’s easy in hindsight to see what’s emerged as a winner in the past. Knowing what to put your time and energy into today is something different.

If you want to take up a new technology in 2021, what is the best use of your time?

The StackOverflow 2020 developer survey says the languages most loved by developers are, in order, Rust, TypeScript, Python, Kotlin and Go. However, the same survey states the languages with best-paying jobs are Perl, Scala, Go, Rust and Ruby.

StackOverflow is, of course, well-known to developers globally, but there’s a potential argument to say its survey is not fully reflective of the world due to the inherent nature of a problem-solving site.

However, GitHub’s 2020 State of the Octoverse report gives insights drawn from 2020’s activity of over 60 million source code repositories created, by more than 56 million developers, with 1.9 billion contributions in the year. This reflects what people are actually doing and provides a different top five of JavaScript, Python, Java, TypeScript and C#.

Perhaps it is significant the number one language in use, according to GitHub, does not hit StackOverflow’s “most loved” list, but even so there’s no denying the modern web is how apps are deployed today, and JavaScript has overwhelmingly become the primary web language. Of course, which JavaScript framework you use is a different matter.

It’s similarly unsurprising Python and Java are next in the list, though for different reasons. Python has emerged a strong favourite of the data science community while Java still dominates enterprise applications – like NetSuite, for one – and Android development.

For my money, you’ll do well picking up JavaScript and/or Python if you aren’t already experienced in those languages. Though there’s another important guide we can draw upon to know which languages and technologies are in demand – and that’s job advertisements.

I’ve gone through the last month of open vacancies on Seek and here’s where the opportunities are – which shows in Australia, at least, C++ and C# still reign supreme. SQL is also right up there, and with the importance of data and analytics, this is always a useful skill to have in your repository.

While job ads reflect a moment in time, this data may well help your decision-making.

As well as programming languages, I’ve included public clouds, DevOps tools, data analytics, and other popular infrastructure technologies.

 

















































C, C++, C# 5474
SQL 3696
.NET 2586
Java 2418
AWS 1994
Python 1960
Azure 1777
JavaScript 1746
Linux 1485
React 1342
Angular 1332
PHP 1222
Tableau 1090
Windows 903
SalesForce 879
Office 365 834
SAS 769
Cisco 682
PowerBI 578
Git 456
Scrum 447
Citrix 440
MVC 424
PowerShell 391
Jira 391
Jenkins 317
Ansible 300
TypeScript 293
GCP / Google Cloud 285
Scala 185
Splunk 179
Juniper 157
Ruby 150
Oracle Cloud 147
Swift 143
ServiceNow 116
MongoDB 105
Golang 88
Puppet 86
Fortinet 77
Kotlin 75
Perl 70
Chef 49
Meraki 35
COBOL 13
Delphi 9
Rust 3
Silverlight 1

 

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