Modern Web Application Development

Who am I?

• Siberian
• Web developer with 10+ year of experience
• Python enthusiast (6+ years)
• Lead Full Stack programmer at

Aleksey Rembish

Agenda

Agenda: 3 Sklik webs

Advertiser's web
(internally userweb)

Agenda: 3 Sklik webs

Partner's web

Agenda: 3 Sklik webs

Administrator's web
(internally adminweb)

Concept #1 (~2008-2009)

Technologies:

TEng, JAK, WebPublisher, MetaServer

Development vs Production:

Structure:

• Mono repository
• Same code for all webs!
• 3x Debian packages for Python codes
• 3x Debian packages for static files

2.4

Concept #2 (~2012)

Concept #3 (~2013)

• HTML debian packages
• Database splitted into multimaster cluster

2.6

Concept #3.5 (~early 2014)

Project structure changes:

• Webs repository separation
• Proxies repository separation
• Automatic integration tests

Technology changes:

2.7

Concept #4 (2014)

Concept #5: Too cloudy

Concept #6: Split the Monolith

• UserWeb and AdminWeb repository separation
• Administrator's access rework

Concept #7: Frontend Rush

• CodeReview as Merge Request
• Code Quality checks
• End-to-End tests
• Local NPM repo

Concept #8: OpenSource it!

• Continuous integration pipelines
• Dev feature test instances

Concept #9: We need more monitoring!

3.5

• Project bootstrapping
• Automatic master/staging deployments
• Production deployment using MR link

Concept #10: Next?

• Type hints in JS and Python
• Canary release without any RT ticket
• More monitoring
• More automatic tests after push / merge
• Technology deprecation
• Legacy code deprecation
• More async code
• Better newbie cold starts
• ...?

There are many books "How to create a great app", but only masters know how to modernize existing one.

https://kariera.seznam.cz/kariera/clanek/1224058820-python-programator-ka-sklik-cz-1224058820

Join             master race

AR, 2017