Dave Farley @davefarley77 Twitter profile

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@BlackKrystel

Dave Farley

@davefarley77

2 years

Scare a software engineer in 5 words or less 👇

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Dave Farley

@davefarley77

2 years

“Code is like humour. When you have to explain it, it’s bad.” -Cory House

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Dave Farley

@davefarley77

1 year

Microservices are maybe not what you think they are, so here's a #Thread to describe them... 1/14

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Dave Farley

@davefarley77

2 years

Look what arrived last week 🏆 Thanks again for all your support on the Continuous Delivery channel!

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Dave Farley

@davefarley77

2 years

The ability to change software easily, safely and with confidence is a marker of its quality.

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Dave Farley

@davefarley77

2 years

Software metrics are for the team to see their progress - not for others to critique their performance.

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Dave Farley

@davefarley77

1 year

My recipe for Continuous Delivery (a thread)... 1/14

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Dave Farley

@davefarley77

2 years

Here are a few thoughts on things I wish I knew when I was first a tech lead... a thread 1/7

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Dave Farley

@davefarley77

1 year

Agile isn't dead, but it is widely misunderstood and more unusual than most people think. a #Thread 1/12

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Dave Farley

@davefarley77

4 years

Why hasn’t TDD taken over the world? Anyone have any ideas? 🤷‍♂️

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Dave Farley

@davefarley77

3 years

📚 BIG NEWS! 📚 My upcoming book is available for preorder NOW! 🚨 Get 35% OFF when you use this link and the code MODERNSWENG ➡️ Helping you to think about your work more effectively and improve the quality of your applications AND your work life!

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Dave Farley

@davefarley77

5 years

Yes, but to be clear, for exploratory testing, not regression testing. Let's use Humans for what they are good at: Fuzzy pattern matching, intelligent analysis. Let's use machines for what they are good at: Fast repeatable results for 10's, or 100's, of thousands of tests.

Bartosz Jedrzejewski

@e4developer

5 years

World expert on continuous delivery @davefarley77 recognising manual testing as an integral part of the pipeline #bitrconf

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Dave Farley

@davefarley77

1 year

What is the most important thing that I have learned in my career as a software developer? Here's a #Thread 1/18

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Dave Farley

@davefarley77

1 year

I confess that I am not a big fan of "The Test Pyramid" so here's a #Thread on what I think is a better focus for your automated testing strategy... 1/14

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Dave Farley

@davefarley77

4 years

What is the machine you used to write your first ever bit of code? Do you remember? 👇

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Dave Farley

@davefarley77

1 year

Excellent blog post on Trunk Based Development in preference to Feature Branching here: "When you have a team, or teams, however, working on a project together, feature branching creates problems"

Still using feature branching? Try trunk-based development instead.

After a year of trunk-based development, I’m happy to give up on pull requests and feature branching. Here's why.

www.infobip.com

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Dave Farley

@davefarley77

2 years

Unit Testing or Acceptance Testing? Actually you need both for the best test-strategy. a thread... 1/12

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Dave Farley

@davefarley77

2 years

If you can improve just one thing in your software development, make it getting faster feedback.

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Dave Farley

@davefarley77

1 year

I think that an average team can produce excellent software with the right approach. What do you think?

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Dave Farley

@davefarley77

11 months

TDD is a talent amplifier. It makes bad developers better and good developers great.

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Dave Farley

@davefarley77

2 years

💯 A professional cook doesn't ask for permission to clean their tools, before moving on to the next dish. Refactoring is the same. We should not ask permission to do a professional job!!

Abel Soares

@abel_soares

2 years

@raimeyuu @allenholub @davefarley77 @MichalBartyzel I don’t see any need for them. Yesterday I was implementing a user story when I found that the ci pipeline needs upgrade. I upgraded it. Then I found that one of the pipeline packages was a private package from my team that also needs upgrade, I upgrade it and while there

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Dave Farley

@davefarley77

1 year

“Programming is the immediate act of producing code. Software engineering is the set of policies, practices, and tools that are necessary to make that code useful for as long as it needs to be used and allowing collaboration across a team.” - Titus Winters

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Dave Farley

@davefarley77

1 year

I'm delighted by how positively my "Modern Software Engineering" book has been received - and it is now being taken on by several Universities as a recommended text 🙌🏻. NEW out as Audiobook - 📖 Kindle and paperback

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Dave Farley

@davefarley77

2 years

In software, when something is painful, the way to reduce the pain is to do it more frequently, not less.

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Dave Farley

@davefarley77

7 months

I recently talked about User Stories on my YouTube channel, and got asked by several people about how I would deal with "Back End Stories", so here is a thread User stories for "Back End" vs User stories for "Front End" a #Thread 1/14

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Dave Farley

@davefarley77

8 months

I think that Continuous Integration, and the disciplines that it forces on us to achieve it, is probably the most profound idea in SW dev practice. So here's a #Thread to explain why I think that this is about much more than semantics or personal preference. 1/15

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Dave Farley

@davefarley77

4 years

What is a book that changed your professional career forever? Let me know 👇

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Dave Farley

@davefarley77

2 years

A few thoughts on the properties of good automated tests (Hint TDD encourages these properties more than after-the-code-unit testing): A Thread. 1/9

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Dave Farley

@davefarley77

4 years

Can you believe it is 10 years since my book “Continuous Delivery” was published?! Check out my Blog Post and enter a free draw to get a free signed first edition copy of the book.

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Dave Farley

@davefarley77

2 years

“An expert is a person who has made all the mistakes that can be made in a very narrow field.” - Niels Bohr.

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Dave Farley

@davefarley77

11 months

Dealing with "Coupling" is one of the things that makes SW a genuinely difficult activity. But I think Coupling is at least as big a deal for SW dev teams as it is for the software itself. Here's a #Thread 1/14

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Dave Farley

@davefarley77

1 year

WELCOME TO THE ENGINEERING ROOM 🗣️ Kent Beck On The FIRST Testing Frameworks, TDD, Waterfall & MORE | The Engineering Room Ep. 16 ➡️ Thank you for joining me @KentBeck ! #SoftwareEngineering #SoftwareDevelopment

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Dave Farley

@davefarley77

1 year

NOW AVAILABLE ❗ Kelsey Hightower On Kubernetes & Cloud Computing | The Engineering Room Ep. 13 ➡️ Thanks for joining me @kelseyhightower ! Let us know what you think about the topics discussed in the pod 👇 #SoftwareEngineering #SoftwareDevelopment

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Dave Farley

@davefarley77

3 years

You can have "E2E Testing Strategies" or "Microservices" but not both. Microservices are, by definition, "independently deployable" so you don't get to test them together before you deploy, because if you do you now have a distributed monolith - which is fine, but not m-service

Sebastian Machuca

@serroba

3 years

@samnewman , I have read a lot about microservices but one topic I haven't seen much is end-to-end tests approaches for when start to adopt eventual consistent architectures. Your testing strategy has to evolve accordingly, adopting new expectations, but I wonder about strategies

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Dave Farley

@davefarley77

1 year

"First make the change easy (warning: this might be hard), then make the easy change." - @KentBeck

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Dave Farley

@davefarley77

1 year

Excellent article on the value of "Trunk Based Development" from @trisha_gee , well I would say it is "excellent" because it says I am right 🤣🤣 ...but thanks Trish 😁😎

Why I prefer trunk-based development - Trisha Gee

Trisha summarizes the advantages of trunk-based development (as opposed to branch-based development) in this blog post.

trishagee.com

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Dave Farley

@davefarley77

2 years

Manual Regression Testing is slow, expensive, low quality, and a poor use of people’s time. Let’s use computers for what they are good at, accurate repetition. Automate all regression testing!

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Dave Farley

@davefarley77

2 years

It is worth emphasising that branching by feature is really the antithesis of continuous integration, and all of our advice on how to make it work is only about ensuring that the pain isn’t too horrible come merge time.

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Dave Farley

@davefarley77

6 years

Just had an idea. If we send an asynch message, the system is in a "super-position of states". As far as the sender is concerned the change, implicit in the message, has both occurred and has not yet occurred. It amused me anyway, physics is one of my nerdisms ;-)

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Dave Farley

@davefarley77

2 years

AVOID. CODE. OWNERSHIP.

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Dave Farley

@davefarley77

1 year

“The function of good software is to make the complex appear to be simple” - Grady Booch.

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Dave Farley

@davefarley77

2 months

After years of trying to improve their software development approach with processes like SAFe, Walmart eventually achieved agility by instead focusing on engineering problems, and fixing them using the techniques of CICD. Thanks to @BryanFinster . 📽️ ➡️

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Dave Farley

@davefarley77

4 years

I think code reviews are good, but pair-programming is better and pair-programming combined with TDD, acceptance tests and Deployment Pipelines is best of all 😎

Jim Humelsine

@jhumelsine

4 years

@davefarley77 - I'm reading "Continuous Delivery". I don't see code reviews mentioned, but I haven't completed the book. I did a search and checked the index and didn't find anything. What's your opinion on manual code reviews?

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Dave Farley

@davefarley77

2 years

Continuous Integration means little, or no branching. Instead we continuously make small changes to Trunk (Master). If branches exist at all, they are tiny and short-lived - for a day at most. Get my CI Top Tips here:

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Dave Farley

@davefarley77

1 year

150,000 SUBSCRIBERS ON YOUTUBE 🤩 A milestone I've been working towards before the end of the year! Mission accomplished. I'll be celebrating in Australia with some nice Australian red wine tonight! 🍷 #ContinuousDelivery

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Dave Farley

@davefarley77

2 years

One of the few things that I can be absolutely definitive about is the definition of a "Deployment Pipeline", because I defined it. So here is a short thread that answers the question “What is a Deployment Pipeline". 1/9

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Dave Farley

@davefarley77

1 year

“Computer science education cannot make anybody an expert programmer any more than studying brushes and pigment can make somebody an expert painter.” - Eric S. Raymond.

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Dave Farley

@davefarley77

1 year

📢 New Engineering Room clip! @KentBeck On AGILE vs WATERFALL ➡️ #waterfall #agile

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Dave Farley

@davefarley77

3 years

I am currently writing a book, on SW engineering. I thought that I would write the same app in Angular and in tech that was available in 1996 (Java, JS, HTML, CSS). So far the code from the 1990's looks like about 1/4 of the code from the 2020's to to the same thing!!?

Tim Mackinnon

@iterex

3 years

@davefarley77 I’m thinking more of languages and tool chains with ridiculous numbers of keywords and concepts vs fundamental simple building blocks you use to build your own abstractions and complimentary tools

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Dave Farley

@davefarley77

5 months

It seems to me that "which do you prefer" is the wrong measure. Which one results in the better code in the shortest time would be a better measure and my vote is for PP (no "extra" review)

Cory House

@housecor

5 months

Out of 4,000+ replies: 77% prefer coding alone over pairing. 81% prefer having code reviews. Poll:

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Dave Farley

@davefarley77

3 years

The answer to the question 'what makes software development difficult?' is simple... It's people.

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Dave Farley

@davefarley77

1 year

The data says working in small teams is one of the keys to success, so what gets in the way of small autonomous teams?

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Dave Farley

@davefarley77

3 years

Git Flow Is A Bad Idea ➡️ #softwaredevelopment #cicd

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Dave Farley

@davefarley77

2 years

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook. 😂

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Dave Farley

@davefarley77

2 months

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook 😂

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Dave Farley

@davefarley77

2 years

What's your favourite software engineering quote? 👇

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Dave Farley

@davefarley77

5 months

The survivor bias argument is pernicious. The other version I like is that when Ignaz Semmelweis promoted the idea that surgeons should wash their hands, the surgeons complained because *some* patients survived without the need to waste time washing. TDD = handwashing for code.

Dave H

@thinkfoo

5 months

I've seen plenty of successful projects with no unit tests

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Dave Farley

@davefarley77

3 years

What's your number one rule for writing clean code? 👇

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Dave Farley

@davefarley77

1 year

This Sunday, welcoming to the Engineering Room... Kent Beck. Sunday 26th 2pm (UK). An insightful chat with one of the forefathers of our industry about the ideas that have shaped how we see modern day software engineering.

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Dave Farley

@davefarley77

1 year

What's the best way to notice poor software at first glance? 👀

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Dave Farley

@davefarley77

1 year

I think that if I am to pick one thing, one pice of advice, it is this: ***Work in Small Steps*** 3/18

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Dave Farley

@davefarley77

2 years

I just came across this fantastic resource from the guys at @mob__mentality It's an organised collection of links and information to stuff that can help you in your work.

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Dave Farley

@davefarley77

1 year

If you work on an "agile team" and it is not working well, then to be agile in any real sense of the word, YOU MUST CHANGE IT, otherwise you aren't being agile at all. 7/12

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Dave Farley

@davefarley77

6 months

Software development speed, matters, we want to create software quickly and efficiently, and the assumption that this comes at the expense of high-quality software or high-end software development is simply a mistake.

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Dave Farley

@davefarley77

2 years

Just passed 20k followers on Twitter 😯 Thank you! 😎

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Dave Farley

@davefarley77

3 years

💡 Always remember... EVERYONE IS A JUNIOR AT SOMETHING! Keep learning. It's OK to say 'I don't know'.

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Dave Farley

@davefarley77

4 years

There is a lot of interesting stuff in this article about Amazon's CD experience. For example: "Microservices in pre-production environments typically call the production endpoint of any services owned by another team"

Automating safe, hands-off deployments

Strategies for continuously deploying to production while balancing safety and speed.

aws.amazon.com

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Dave Farley

@davefarley77

5 years

Yes, I am not really a big fan of the idea of Monoliths vs Microservice though it is very common. The real issue is managing coupling appropriately. It is important at *all* scales, in all architectures and technologies. Separation-of-Concerns is a fundamentally good idea!

Mark Burgess

@markburgess_osl

5 years

Yes, as I've been demonstrating formally, a connected service mesh is just a monolith on a larger scale.

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Dave Farley

@davefarley77

5 months

If pair programming was such a bad idea, why do so few teams that practise it go back to working without it? 🤷‍♂️

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Dave Farley

@davefarley77

1 year

What would be your advice to somebody that is about to be promoted into a team lead role? 💬 (I'll be using some of these pieces of advice for a video!)

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Dave Farley

@davefarley77

2 years

"I Hate Agile!" | @allenholub On Why He Thinks Agile And Scrum Are Broken ➡️ Check out this 8 minute clip from our recent Engineering Room episode together! 🎬 #agile #softwareengineering

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Dave Farley

@davefarley77

2 years

100,000 subscribers! Thank you!

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Dave Farley

@davefarley77

3 years

In #SoftwareDevelopment , we spend too much time obsessing about tools and not enough time thinking about what we are actually aiming to achieve. Can focusing on “behaviour” help us to take more ownership of the problems we are trying to solve?

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Dave Farley

@davefarley77

2 years

Revealing the first guest on The Engineering Room... The fascinating @martinfowler ! An hours chat with a giant of our industry. 📅 Available from SUNDAY THE 5th DECEMBER 2pm (UK) ➡️

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Dave Farley

@davefarley77

1 year

"Modern Software Engineering gets it right and describes the ways skilled practitioners engineer software today." "There are lots of books that will tell you how to follow a particular practice; this book is different." 📚 Grab your copy ➡️

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Dave Farley

@davefarley77

3 years

My NEW BOOK is number 1 in Amazon's software engineering chart... DESPITE IT ONLY BEING ON PREORDER! 😱 Pre-order from Amazon HERE ➡️ OR 🚨 Get 35% OFF when you use this link and the code MODERNSWENG ➡️

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Dave Farley

@davefarley77

2 years

Have you got your copy yet? 📚 'Modern Software Engineering' OUT NOW AMAZON 🔗 INFORMIT 🔗 Think about your work more effectively, manage it more successfully. #softwareengineering #softwaredevelopment

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Dave Farley

@davefarley77

2 years

Exactly 2 years from when I created the CD YouTube channel... I've just hit 4,000,000 total views 🤯 Thanks for the support so far.

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Dave Farley

@davefarley77

6 years

One interesting behaviour that I have seen with teams using #ContinuousDelivery with VERY high levels of test automation, is the move to use code as config rather than text files. By this I mean config written in a full programming language, with all its advantages, and tested.

Rod Johnson

@springrod

6 years

Delivery and infrastructure should be programmable using core development skills and practices. They're powerful. The work of Turing, Hopper, Dijkstra and so many other greats led to modern programming languages. Let's not ignore it and type ever more YAML.

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Dave Farley

@davefarley77

5 years

Just as a matter of interest, when did #ContinuousDelivery become CI/CD? Continuous Delivery is MUCH more than deployment automation. (It actually requires a broader scope than DevOps too, but don’t get me started on that!) 😁

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Dave Farley

@davefarley77

1 month

Most software job interviews include a session where the applicant is quizzed on details of the programming language in use by the team. But does skill with your programming language really matter? #Thread 1/12

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Dave Farley

@davefarley77

5 years

Agreed! The fundamentals don't change. I think that quite a lot of this idea of us being a fast-moving industry is guff! The ephemeral stuff changes, the stuff that you can learn in a few weeks of use, the rest stays the same. </GrumpyOldManMode>

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Dave Farley

@davefarley77

2 months

"Semantic Diffusion" is everywhere and why this matters... a #Thread 1/19

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Dave Farley

@davefarley77

3 years

💯💯I am convinced that a lot of people have never seen software done well.

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Dave Farley

@davefarley77

6 months

Why hasn't TDD taken over the world? That's what I'm discussing tomorrow, 7pm (UK) on the CD Channel.

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Dave Farley

@davefarley77

3 months

Continuous Delivery specifically and Agile development in general is primarily about optimising our work so that we can make progress in small steps, and so better understanding our progress after each small step, but what does this mean for Software Architecture? 1/14 #Thread

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Dave Farley

@davefarley77

6 months

One of the common pushbacks I get about learning TDD, is that people like me who teach it use overly simple examples in code, there are several reasons for this, and some of them are VERY good reasons... "In defence of Coding KATAs" a #Thread 1/20

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Dave Farley

@davefarley77

11 months

“It’s really complex to make something simple.” - Jack Dorsey

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Dave Farley

@davefarley77

1 year

Working incrementally is vital to doing a great job. Complex systems evolve through a series of many small steps.

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Dave Farley

@davefarley77

2 years

TOP 5 TIPS FOR TDD Last night's video reminded me that there are a lot of good developers out there still making simple mistakes when it comes to #TDD . Below are my tips for success and why it WILL work for you. A THREAD 🧵🪡 #SoftwareDevelopment #SoftwareEngineering

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Dave Farley

@davefarley77

1 year

TDD applies a pressure to create code that is objectively “higher quality". This is irrespective of the talent or experience of the software developer.

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Dave Farley

@davefarley77

2 years

Perhaps the most important role of the Team Leader is to create a learning culture and a safe environment in which colleagues can share ideas, and where we can all safely make mistakes and learn from them. 7/7

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Dave Farley

@davefarley77

2 years

The most important practice for continuous integration to work properly is frequent check-ins to trunk or mainline. You should be checking in your code at least a couple of times a day.

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Dave Farley

@davefarley77

2 years

I quite like @martinfowler 's joke: "You either change the company that you work in, or you change the company that you work in" 😉

William Di Pasquale

@dipasqualew

2 years

@J_D_Luke @davefarley77 I agree! But I also believe that a healthy culture is something we can build day by day, and that we are not doomed to keep working in environments of low trusts. Hard to do but good leadership can fix that

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Dave Farley

@davefarley77

1 year

So if you build your microservice, but before you release it into production, you need to test it with the current version of all the other services, it *isn't a microservice* it's something else. 10/14

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Dave Farley

@davefarley77

2 years

If it hurts, do it more frequently, and bring the pain forward...

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Dave Farley

@davefarley77

7 years

I quite like this In study of over 4k projects teams with 5 people out perform teams of 20 by factor of nearly 4:1

Overstaffing for Schedule Compression in Software Development

Think adding people to a software project is a good idea for schedule compression? QSM's research shows the increased cost and defects might not be worth it.

www.qsm.com

Sam Newman

@samnewman

7 years

OK braintrust - are there any studies out there that you trust that look at optimum team size for software development?

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Dave Farley

@davefarley77

2 years

What are your TOP 3 #software books RANKED? 1️⃣. 2️⃣. 3️⃣.

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Dave Farley

@davefarley77

2 years

What's the biggest red flag when applying for a new job? 🚩👇

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Dave Farley

@davefarley77

2 years

📅 THIS SUNDAY @allenholub and I talk about AGILE, amongst other topics, in the latest instalment of The Engineering Room! 🔔 Subscribe and turn on notifications to never miss an upload.

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