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Mario Fernández profile picture

Mario Fernández

I develop software for a living. Then I go home and continue reading about software because I just can't get enough

Location Germany Joined Joined on  Personal website https://hceris.com github website twitter website

Work

Staff Engineer at Wayfair

Book Review: Site Reliability Workbook
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Book Review: Site Reliability Workbook

#bookreview #devops #monitoring #alerts
Comments
2 min read

Recent comments

Book Review: Accelerate

That's a good point. I've seen tbd being a contentious point...

Book Review: Never split the difference

I've been saying a variation of the "saying yes is easier tha...

Either Types for Rust

it doesn't have to be an error, although it's usually used li...

Technical stories, a miscast artifact of agile development

I track the technical stories in the backlog and see if the n...

Recording APIs with WireMock

haven' tried it. Whenever I've used WireMock it has been in c...

Book Review: The art of leadership

Managing humans is pretty good, would be a 4-star :P. Being g...

Making a Microservice More Resilient Against Downstream Failure
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Making a Microservice More Resilient Against Downstream Failure

#softwareengineering #monitoring #datadog #netflix
Reactions 6 Comments
6 min read
Book Review: Designing Data-Intensive Applications
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Book Review: Designing Data-Intensive Applications

#bookreview #architecture #distributedsystems
Comments
2 min read
Multiwindow, Multi-Burn-Rate Alerts in DataDog
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Multiwindow, Multi-Burn-Rate Alerts in DataDog

#monitoring #alerts #terraform #datadog
Reactions 6 Comments
6 min read
Applications Instead of Libraries
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Applications Instead of Libraries

#architecture #react #microfrontends #javascript
Reactions 2 Comments
9 min read
Book Review: Staff Engineer
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Book Review: Staff Engineer

#bookreview #leadership #teamorganization #architecture
Reactions 1 Comments
2 min read
Secure a Rails API with Auth0
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Secure a Rails API with Auth0

#ruby #rails #oauth #security
Reactions 2 Comments
9 min read
Monitoring Alerts That Don't Suck
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Monitoring Alerts That Don't Suck

#monitoring #practices #alerts #oncall
Reactions 1 Comments
6 min read
From Redux to the Context API: A Practical Migration Guide
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From Redux to the Context API: A Practical Migration Guide

#react #redux #contextapi #architecture
Reactions 6 Comments
11 min read
Starting you new React application with Redux? Consider a simpler approach using the Context API
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Starting you new React application with Redux? Consider a simpler approach using the Context API

#react #redux #contextapi #architecture
Comments
6 min read
Book Review: Management 3.0
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Book Review: Management 3.0

#bookreview #practices #agile
Comments
2 min read
How not to do a take-home coding assignment
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How not to do a take-home coding assignment

#interview #codingchallenge
Reactions 2 Comments
5 min read
Authorization Code Flow with PKCE (OAuth) in a React application
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Authorization Code Flow with PKCE (OAuth) in a React application

#auth0 #oauth #react
Reactions 7 Comments
5 min read
Signing your commits in git
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Signing your commits in git

#security #git #gpg
Reactions 6 Comments 1
3 min read
Book Review: Accelerate
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Book Review: Accelerate

#bookreview #practices #teamorganization #continuousdelivery
Reactions 1 Comments 3
2 min read
Be a good Kubernetes citizen and use Pod Disruption Budgets
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Be a good Kubernetes citizen and use Pod Disruption Budgets

#kubernetes #operations #devops #terraform
Reactions 3 Comments
4 min read
Book Review: Team topologies
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Book Review: Team topologies

#bookreview #practices #teamorganization
Comments
3 min read
So, what does the NGINX ingress controller actually do?
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So, what does the NGINX ingress controller actually do?

#kubernetes #ingress #nginx
Reactions 2 Comments
6 min read
Setting up OAuth for Grafana with Auth0
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Setting up OAuth for Grafana with Auth0

#auth0 #oauth #infrastructureascode #terraform
Reactions 1 Comments
4 min read
Book Review: Prometheus up and running
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Book Review: Prometheus up and running

#bookreview #monitoring #devops #prometheus
Reactions 1 Comments
2 min read
Provisioning an Application Load Balancer with Terraform
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Provisioning an Application Load Balancer with Terraform

#aws #terraform #loadbalancing #networking
Reactions 5 Comments
4 min read
Book Review: No rules rules, Netflix and the culture of reinvention
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Book Review: No rules rules, Netflix and the culture of reinvention

#bookreview #netflix
Reactions 1 Comments
3 min read
Keeping a technical backlog
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Keeping a technical backlog

#agile #practices #leadership
Reactions 2 Comments
4 min read
Provisioning a Network Load Balancer with Terraform
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Provisioning a Network Load Balancer with Terraform

#aws #terraform #loadbalancing #networking
Reactions 1 Comments
7 min read
Book Review: Working effectively with legacy code
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Book Review: Working effectively with legacy code

#bookreview #architecture #practices
Comments 1
2 min read
Getting technical stories into an iteration
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Getting technical stories into an iteration

#agile #practices #leadership
Reactions 1 Comments
5 min read
Book Review: Never split the difference
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Book Review: Never split the difference

#bookreview #negotiation
Reactions 2 Comments 3
3 min read
Either Types for Rust
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Either Types for Rust

#rust #functional #exceptions #either
Reactions 7 Comments 3
4 min read
Technical stories, a miscast artifact of agile development
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Technical stories, a miscast artifact of agile development

#agile #practices #leadership
Reactions 8 Comments 3
6 min read
Book Review: The Rust programming language
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Book Review: The Rust programming language

#bookreview #rust #systemsprogramming
Reactions 2 Comments 1
2 min read
Diagrams as code for infrastructure as code
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Diagrams as code for infrastructure as code

#infrastructure #diagrams #documentation
Reactions 5 Comments 1
4 min read
Dev huddle as a tool to achieve alignment among developers
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Dev huddle as a tool to achieve alignment among developers

#agile #practices #leadership
Reactions 7 Comments
6 min read
Book Review: The art of leadership
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Book Review: The art of leadership

#bookreview #leadership #rands
Reactions 2 Comments 2
2 min read
Understanding VPC endpoints
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Understanding VPC endpoints

#aws #terraform #vpc #networking
Reactions 6 Comments
5 min read
Book Review: The software architect elevator
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Book Review: The software architect elevator

#bookreview #architecture #devops
Reactions 4 Comments
2 min read
A directory structure for React projects
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A directory structure for React projects

#react #typescript #codeorganization
Reactions 11 Comments
3 min read
Book Review: Kotlin in Action
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Book Review: Kotlin in Action

#bookreview #kotlin
Reactions 2 Comments
2 min read
Templating Concourse pipelines with Jsonnet: Follow-up
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Templating Concourse pipelines with Jsonnet: Follow-up

#concourse #jsonnet #templating
Reactions 5 Comments
4 min read
Book Review: Securing DevOps
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Book Review: Securing DevOps

#bookreview #devops #security
Reactions 1 Comments
2 min read
Templating Concourse pipelines with Jsonnet: An Introduction
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Templating Concourse pipelines with Jsonnet: An Introduction

#concourse #jsonnet #templating
Reactions 2 Comments
6 min read
Book Review: Effective TypeScript
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Book Review: Effective TypeScript

#bookreview #typescript
Reactions 5 Comments
3 min read
Either Types extended version
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Either Types extended version

#kotlin #functionalprogrammi #arrow #exceptions
Reactions 3 Comments
1 min read
Useful commands to work with certificates
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Useful commands to work with certificates

#certificates #ssl #openssl
Reactions 2 Comments
5 min read
Either Types as an alternative to throwing exceptions in Kotlin
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Either Types as an alternative to throwing exceptions in Kotlin

#kotlin #functional #arrow #exceptions
Reactions 6 Comments
5 min read
Setting up Auth0 with Terraform
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Setting up Auth0 with Terraform

#auth0 #oauth #iac #terraform
Reactions 12 Comments
6 min read
Authorization for a Kotlin Spring backend, using JSON Web Tokens
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Authorization for a Kotlin Spring backend, using JSON Web Tokens

#auth0 #oauth #kotlin #springboot
Reactions 7 Comments
5 min read
Comparing Traefik2 with Traefik
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Comparing Traefik2 with Traefik

#traefik #devops #loadbalancing #ssltermination
Reactions 1 Comments
5 min read
Fail a test in Jest if an unexpected network request happens
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Fail a test in Jest if an unexpected network request happens

#react #jest #testing #reacttestinglibrar
Reactions 1 Comments
3 min read
How to split the deployment of your front end and back end with the help of Consumer Driven Contract Testing
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How to split the deployment of your front end and back end with the help of Consumer Driven Contract Testing

#contracttesting #pact #continuousdelivery #jest
Reactions 1 Comments 1
9 min read
Descriptive assertions in Kotlin for clearer tests
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Descriptive assertions in Kotlin for clearer tests

#kotlin #testing #strikt
Comments
3 min read
How to automate REST API end-to-end tests in a CI environment with Postman and Newman
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How to automate REST API end-to-end tests in a CI environment with Postman and Newman

#rest #e2e #postman #newman
Reactions 2 Comments
8 min read
Custom Components in Formik
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Custom Components in Formik

#react #formik #reacthooks
Reactions 2 Comments
3 min read
Dockerizing a JVM app with CircleCI
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Dockerizing a JVM app with CircleCI

#docker #circleci #jvm #serverspec
Comments
6 min read
Painless JSON with Kotlin and jackson
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Painless JSON with Kotlin and jackson

#kotlin #json #jackson #rest
Reactions 1 Comments
7 min read
Mock verification in Kotlin using MockK and Atrium
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Mock verification in Kotlin using MockK and Atrium

#kotlin #testing #mockk #springboot
Comments
4 min read
Making Concourse's fly tool work behind an authenticated ALB
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Making Concourse's fly tool work behind an authenticated ALB

#concourseci #aws
Reactions 1 Comments
3 min read
An overview of IAM in AWS
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An overview of IAM in AWS

#aws #iam #terraform #security
Reactions 1 Comments
5 min read
Checking the validity of a certificate in Concourse
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Checking the validity of a certificate in Concourse

#continuousintegrati #concourseci #certificates
Comments
2 min read
Testing containers with dependencies with localstack
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Testing containers with dependencies with localstack

#tdd #serverspec #aws #localstack
Reactions 1 Comments
5 min read
Using AWS Secrets Manager in Concourse
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Using AWS Secrets Manager in Concourse

#continuousintegrati #terraform #awssecretsmanager #concourseci
Reactions 1 Comments
3 min read
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