A presentation at PyCon SK 2019 in in Bratislava, Slovakia by Paweł Lewtak
Long Term IT Projects
Pawel Lewtak @pawel_lewtak
What to build?
What problem to solve?
“The root of all evil in programming is misunderstanding of the problem. Ask right questions to right people before first line of code.” Mariusz Gil
“It’s developers (mis)understanding not expert knowledge that get’s released to production” Alberto Brandolini
“Tech people must speak the language of Business people, not vice versa.” Stefan Priebsch
“The limits of my language mean the limits of my world.” Ludwig Wittgenstein
Domain Driven Design
Event Storming
“The only thing that is constant is change.” Heraclitus
Monolith vs Microservices
“you shouldn’t start a new project with microservices” Martin Fowler
Service Oriented Architecture
Clean architecture
Don’t reinvent the wheel
You’re not unique
microservices serverless artificial intelligence machine learning blockchain nosql virtual/augmented reality internet of things cloud computing deep learning quantum computing
Test Driven Design
Tests !== Test Driven Design
“If it’s hard to write a test, it’s a signal that you have a design problem, not a testing problem” Kent Back
Continous integration
Continous deployment
Deployment !== Release
Business Metrics
If it moves, automate it!
“If boring repetitive things aren’t automated a manager gets hired.” Niranjan Paranjape
Start with README
Name of the service Point of contact and Slack channel Usage Running the service System Runbook Monitoring Documentation Source: https://tech.buzzfeed.com/better-docs-8fccb8ebd6a4
“Documentation is a love letter that you write to your future self.” Damian Conway
Communication is NOT a soft skill
Communication is a core skill!
“People who don’t share their knowledge look more productive because they’re holding back the entire team.” Jessica Kerr
“I wish the understanding were more widespread that we plateau in coding skill mid-career, it is all about communication after that” Denton Gentry
Thank you!
Questions
Not everybody has a chance to work on new project from scratch. Everybody has some ideas what to do for such a project so it’ll be a good one instead of legacy in a near future. During this talk I want to share my experience and show what works for me. I’ll start from project analysis and end on deployment and beyond. I want to discuss some common mistakes and misconceptions and hopefully give you some ideas you could use for your own project regardless of its size. With a bit of work some/all could be applied to legacy projects as well.
The following resources were mentioned during the presentation or are useful additional information.
Here’s what was said about this presentation on social media.
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