Eduards Sizovs
@eduardsi
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Dev, architect, mentor, trainer, ex-CTO, 15+ y/o experience. 🎓 Masterclass:
Singapore
Joined July 2009
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Last Seen Profiles
Pinned Tweet
– We don't write tests.
– Why?
– Because we don’t have time for it.
– Why?
– Because there is too much work and pressure.
– Why?
– Because we don’t move fast enough.
– Why?
– Because changing software has become difficult and risky.
– Why?
– Because we don’t write tests.
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When you don't have time to write a good exception message, use this
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Junior developers love magic. Seniors hate magic. And the reason seniors hate magic is that they know, from experience, that magic (things they don't understand) eventually bite in the ass.
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Developers need autonomy, mastery, and purpose, not pizzas, hugs, and ping-pong tables.
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Sometimes when I’m programming in JavaScript I just want to yell “Fuck this” but I can’t remember what “this” refers to.
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👉 Sequential by default, reactive if necessary.
👉 Latest state-based by default, event-sourced if necessary.
👉 ACID by default, BASE if necessary.
👉 Monolithic by default, distributed if necessary.
Keep things simple.
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🙉💥 Chaos Engineering for Teams: every week, one randomly-selected person takes the whole day off regardless of their current work. Without informing others.
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🕙 More hours is not productivity
😴 Less sleep is not optimization
👨💻 Being busy is not making progress
⛱ Doing nothing is not wasting time
♥ Family is not an interruption
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I pulled a list of 35 Java libraries that I like and use daily. Some of them are well-known; others are not so popular, yet very useful at work:
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Imagine if every product included an honest message from the engineering team such as "not unit tested", “delivered to you under the pressure of unreasonable managers,” etc. That would be a more interesting and valuable read than marketing BS :-)
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Well-crafted software is expensive. Crappy software even more so.
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Lightweight, simpler, no-magic alternatives to popular Java libraries and frameworks:
* Spring -> Dagger (or Guice)
* Spring MVC -> Javalin (or Spark)
* Hibernate -> jOOQ
* Hystrix -> Failsafe
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1️⃣ Simple is not necessarily easy.
2️⃣ Good is not necessarily perfect.
3️⃣ Fast is not necessarily sloppy.
4️⃣ Busy is not necessarily productive.
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I invited Carson Gross – the creator of Htmx (and the author of 😄) to the upcoming
@DevTernity
, to bring web development back to its senses, and save us, young grugs, from JS and React fatigue. You'll learn about good old hypermedia architecture, see the…
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Every time an experienced developer is working alone on something that no other team member can replicate, he/she gets a little smarter, and the entire team gets dumber. We need more mentors and fewer I'll-do-everything-myself-developers.
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Clean Architecture with all its ports, adapters, and layers of abstraction is overhead for most apps, even non-trivial ones. When I look at some demo apps showcasing clean architecture, it makes me cry. 🧵
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1️⃣ DevOps is not a role
2️⃣ Agile is not lack of process
3️⃣ Setting up a build server is not CI
4️⃣ Continuous Delivery is not Continuous Deployment
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Although tests cannot prove the absence of bugs, every bug proves the absence of tests.
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When you see people coming to your work for a job interview
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I invited Carson Gross – the creator of Htmx (and the author of 😄) to the upcoming
@DevTernity
, to bring web development back to its senses, and save us, young grugs, from JS and React fatigue. You'll learn about good old hypermedia architecture, see the…
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If you ask a candidate to invest time in a coding assignment, responding with "sorry, you didn't make it to the next round" is not enough. You owe the candidate a detailed code review.
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I can't be a better software engineer than I am a person.
— Kent Beck
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Books that have changed my life:
1️⃣ The Way of the Peaceful Warrior – how to find harmony
2️⃣ Nonviolent Communication – how to deal with people
3️⃣ Company of One – how to run a business
4️⃣ Antifragile – how to thrive in the ever-changing world
5️⃣ Atlas Shrugged – how to be strong
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– "Let's use AWS, Docker, Kubernetes, Kotlin, and Vue.js. Now please remind me, what application we are building?"
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Give the team that "doesn't have time" to write good code infinite time, and you'll see the same bad code, only written longer. Bad engineering is rarely a capacity (time) problem. It's a competency (or attitude) problem.
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I often ask senior developers if they mentor colleagues, and only a few hands go up. But when I ask them if their colleagues need to improve, everyone says yes! Everyone is good at finding flaws in others. Be the one who eliminates flaws.
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These "invisible" tasks will make you a distinguished developer. They are never part of Product Backlog:
- mentoring people
- energizing people
- helping people overcome life struggles
- spreading optimism
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1️⃣ Job is not a career
2️⃣ Job title is not significant
3️⃣ Job promotion is not an indicator of skills
4️⃣ Job interview is not one-sided
5️⃣ Job change is not disloyalty
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Productivity cannot be achieved by doing more: trying to make a day longer by waking up at 5am, more thinking, more planning. It's a recipe for burnout. True productivity is achieved by doing less and removing unnecessary clutter from our lives.
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The average software developer doesn’t own a single book on the subject of his or her work, and hasn’t ever read one. That fact is horrifying for anyone concerned about the quality of work in the field — Peopleware
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If you don't have a mentor – don't worry. Kent Beck, Martin Fowler, Uncle Bob can be your mentors. Just read proper books.
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— Manager: Bob, you need to work more on your soft skills.
— Worker: My name is Steve.
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A list of developers to follow on Twitter (with good signal vs. noise ratio) –
@jnabrdalik
@venkat_s
@kelseyhightower
@housecor
@sandromancuso
@sarah_edo
@paul_irish
@mfeathers
@yegor256
@jbrains
@kszdev
@samnewman
@simonbrown
@VictorRentea
@_ericelliott
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DRY (Don't Repeat Yourself) rarely comes to the party alone. He usually brings in an evil friend called Coupling.
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Is your project not developing fast enough? Instead of hiring more people, stop and think what slows you down. Unlikely the problem is in the number of people. As my friend said – what a small group cannot handle, a big one will fuck up even more.
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There is no 1-to-1 relationship between a unit test and a class under test. It's the road to mocking and stubbing hell. Often multiple classes must be treated and tested as a single unit.
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😆10 minutes well spent:
— "javascript developers call very special complexity demon spirit in javascript "callback hell" because too much closure used by javascript libraries very sad but also javascript developer get what deserved let grug be frank"
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It doesn't matter how clean your code is if no one wants to work alongside with you. The degree to which other people want to work with you is an indication of how successful you’ll be in your career. Be the engineer that everyone wants to work with. Don't be an asshole.
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Together with
@codingandrey
we've built a (free) project that simplifies the discovery of tech videos. We took videos from YT, removed marketing noise and added:
✅ Better ranking
✅ Better search
✅ Slim UX
✅ GitHub contribs
✅ RSS (soon)
@WatchDevTube
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Questions that I love asking when i̶n̶t̶e̶r̶v̶i̶e̶w̶i̶n̶g̶ talking with developers:
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In the JS ecosystem, the framework that comes closest to the exceptional developer experience of Rails is
@adonisframework
.
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Hetzner dedicated server:
12 vCPU
64 GB RAM
512 GB NVMe SSD
$48/month or $96/month for HA
DigitalOcean Managed Postgres instance:
16 vCPU
64 GB RAM
360 GB NVMe GB SSD
$900/month or $1800/month for HA
No thanks. Even if you have no clue how to set up and operate Postgres (bad…
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Developers, unlike many other professions, have superpowers to create things from nothing and affect humanity. We are creators. Let's use our time and skills wisely.
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The biggest software engineering waste is not over-engineering. It's not even building features that nobody will use. It's over-engineering the features that nobody will use.
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If want to find great tech books, do what you always did – search for the newest books. But in reverse order:
1) The Pragmatic Programmer: 20 y/o
2) Refactoring = 20 y/o
3) TDD by Example: 17 y/o
4) Domain-Driven Design: 16 y/o
5) Clean Code: 11 y/o
...
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Tools for better writing:
✍️ Hemingway
✍️ Grammarly
✍️ DeepL
✍️ Ludwig
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A lot of problems in software development are caused by teams' inability to control WIP. When faced with the pressure, instead of reducing WIP and thus reducing time-to-market, we are worsening the situation by accepting more work than is optimal for our capacity.
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The state of IT in 2019:
💩 IT managers rarely have a solid development background.
💩 Developers don't want to become managers and protect the good.
💩 Juniors exponentially outnumber seniors.
💩 Mentoring is rare.
💩 Edu system doesn't teach craftsmanship, XP, best practices.
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Two agile coaches are trying to understand what a "Proxy" Product Owner is doing in the Agile team:
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Mentoring satisfies the crucial need of any developer: the desire to improve, also known as Mastery. Hiring people that are eager to share and teach will increase the retention rate in your company.
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As a code reviewer, let go of your ego, and remember that the code should not be written in your way; the code should be written in a *good* way. Good way != Your way.
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When you post your article vs. when someone posts your article on Hackernews:
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In any serious software system, there is an infinite number of places that could be improved. That leads to a problem: because there is always something to refactor, devs fall into the trap of refactoring everything randomly without considering the financial impact of their work.
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When developers who complain that their managers do not give enough time to write "high-quality code," are given more time, they keep producing crap. There must be a connection.
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I know many developers that show no interest in development processes – understanding of Scrum, Kanban, Lean "is for managers." Then they complain about the bad processes at work. 💡 Remember: If you don't know how to manage the dev process, someone else will do this for you.
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The most important interview question you should ask senior developers – how will you develop people?
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1️⃣ Junior is not less valuable.
2️⃣ Senior is not necessarily good.
3️⃣ Experienced is not necessarily right.
4️⃣ Experts don't really exist.
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Using a custom domain and HTTPS locally is super easy thanks to
@caddyserver
, which saves you all the hassle and provisions local certificates for you.
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Good code is code that reduces the discovery cost and the cost of change.
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My favorite questions when interviewing team leaders:
- How will you grow others?
- How will you ensure you're not needed?
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We want to deliver value sooner, not faster. Driving fast doesn't necessarily make you arrive at the destination sooner.
Teams can (consistently) deliver value sooner by moving in TDD baby steps, shipping small increments, reducing WiP. Not by running at breakneck speed.
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If you think pair programming slows you down, you don't understand software development, because you see it as a typing business. In typing business, you want to get more keystrokes. But with pair programming, you get fewer keystrokes.
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Eliminating the cause of the technical debt is more important than eliminating the technical debt.
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Resist writing code for the future. Today you know *less* than tomorrow. Tomorrow you'll write code differently because you'll be smarter.
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Very accurate distinction that do not reject element of art
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Technologies come and go, so your precious time. Fundamentals stay intact and are portable across programming languages, tools, and frameworks. Invest your time accordingly.
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Don't be afraid to write a little more code if it helps reduce coupling. Typing is cheap; coupling is expensive.
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If you think that by calling developers "hackers", "ninjas", "gurus", "rockstars" in your job ads you'll attract more candidates, think twice. Only a small fraction of dev pool identifies themselves with those terms... and you better not hire them. "Developer" is good enough.
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The best social network for hiring like-minded people is... Goodreads. Want to hire software craftspeople? Search for people who enjoy reading about Clean Code, TDD, DDD 🤓📚
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Pair programming doesn’t mean sitting together all the time (which can be exhausting and counterproductive). My favorite PP sessions involve constantly shifting between two modes – working together and independently.
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Hackatons in corporations: after years of crazy deadlines, boring tasks, and suppressed ideas, we expect our developers to suddenly become creative on a certain date and build something really innovative.
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A busy senior developer is explaining current architecture to new hires:
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These are hard times. Now people have to wash hands regularly, cook food, play more with their kids... If it continues, God forbid, it will lead to a crazy thing called reading.
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The world needs more programmers. What if Parnas was right?
— "One bad programmer can easily create two new jobs a year. Hiring bad programmers will just increase our need for them. If we had more good programmers, and could easily identify them, we would need fewer, not more."
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From my experience, the worst leaders (and managers) are always busy. A good manager and leader should see things that other people don't, and timely notice and resolve all kinds of issues *before* they grow bigger. That’s impossible when you’re busy and overwhelmed.
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For-profit events that do not cover speaker's travel $, claiming "we are not-profit" harm themselves and others. Honesty is the best policy.
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Years of experience do not make you a better developer. It's not the quantity, but the quality of years is what matters most: who did you work with, what did you do and how.
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Pair programming has many benefits, but it is not for everyone. Remember that there are extreme introverts that don't feel comfortable working in pairs. We need to create comfortable environment where everyone can perform at their best.
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When you try to achieve speed at the expense of quality, you lose both.
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Change management tip: before proposing your idea to the group, share it with every group member individually: ask their opinion, address their concerns, and get their buy-in.
That reduces friction big time because now you're pitching the idea to a group of supporters vs. a…
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How a programmer sees his/her own code:
❤ Good code, written by a good programmer, under unbearable working conditions and time pressure.
How a programmer sees code written by a colleague:
💩 Bad code, written by a bad programmer, who had all the time in the world.
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