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SLI Evolution Stages
How to dodge vanity metrics and measure the right service level indicator and why?
Aug 27
•
Alex Ewerlöf
10
SLI Compass: Fidelity and Granularity
A Mental Model to Assess Existing SLIs and Evaluate New Ones. We discuss 2 dimension: fidelity shows how closely your SLI is measuring the user…
Aug 8
•
Alex Ewerlöf
8
3
Service Level Topology
Visualizing the service consumption and measurement topology while avoiding the most common SLI/SLO pitfalls
Aug 3
•
Alex Ewerlöf
June 2025
SLA vs SLO
Demystifying the most common misconception in Service Level jargon
Jun 21
•
Alex Ewerlöf
22
4
Wardley Maps & Pace Layering for Senior Tech Leads and Engineering Leaders
Intro to both tools, why they exist, how they overlap and pragmatic tips how to use them and when
Jun 6
•
Alex Ewerlöf
29
4
May 2025
Ephemeral taskforce
The pragmatic alternative to technical committees
May 31
•
Alex Ewerlöf
12
When a team is too big
What signs to look for and how to increase productivity with all-round skillset
May 15
•
Alex Ewerlöf
27
4
Staff archetypes are anti-patterns
Why the Staff+ archetypes are counterproductive and what to do instead?
May 14
•
Alex Ewerlöf
28
1
April 2025
Staff+ self-onboarding questions
Useful questions to get a head start as a newly hired Staff, Principal, or Distinguished engineer
Apr 17
•
Alex Ewerlöf
35
February 2025
Premature optimization
A mental model to detect and prevent optimizing the wrong thing, at the wrong time, or for the wrong reasons
Feb 24
•
Alex Ewerlöf
24
Async map with limited parallelism in JavaScript
Using generators and promises to control backpressure
Feb 23
•
Alex Ewerlöf
11
Gen AI assimilation
Assimilating creative work ignoring copyright law
Feb 13
•
Alex Ewerlöf
8
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