The Sweet Spot
On software development, engineering leadership, machine learning and all things shiny.
TensorFlow For Tears: Part 1

How do you deal with the travails of colic and new parenthood? You plunge yourself into an ML project, of course. Here, we discuss a naive solution to detecting baby cries via an onboard microphone on a Raspberry Pi.

Elixir and Elm things I've written about elsewhere

While it’s been pretty quiet around these parts, I’ve kept the technical blogging up over on my employer’s blog. I’ve got quite a few posts around Elixir:

Wejoinin at Ten

I posted an article on Medium titled “Wejoinin at Ten” describing our experience developing Wejoinin over the past ten years as a long-running passion project - and talk about the directions we hope to be taking it in the next ten.

Pitfalls to avoid when moving to async systems

I recently published a post on the Carbon Five blog titled “Evented Rails: Decoupling complex domains in Rails with Domain Events” that takes some of my thoughts about moving a Rails app to use Domain Events - leveraging the power of Sidekiq (or your job runner of choice) to send async messages between different domains of your app.

JHipster & Spring Boot for Rails developers

The first question you may be asking is - why would I want to go from Rails to Java?

Rails, meet Phoenix: Migrating to Phoenix with Rails session sharing

You’ve resolved to build your company’s Next Big Thing in Phoenix and Elixir. That’s great! You’re facing a problem though - all user authentication and access concerns are performed on your Rails system, and the work to reimplement this in Phoenix is significant.

Evented Rails: Decoupling domains in Rails with Wisper pub/sub events

One common pattern in Domain-Driven Design is the use of publish/subscribe messaging to communicate between domains. When Domain Events are created from within a domain, other domains are able to subscribe to these events and take action within their own domains, respectively.

Domain-Driven Design & The Joy of Naming

I want to discuss a topic near and dear to my heart, and what I believe is at the crux of effective software design. It’s not a new functional language, it’s not a fancy new framework, a how-to guide to do microservices, nor a quantum leap in the field of machine learning.

Knex.js and PostGIS cheat sheet

As follows are some code snippets for using Knex.js for executing Postgres and PostGIS queries.

Lossless rate limiting with RxJS

Much of RxJS involves working with backpressure - how to reconcile streams that emit/process data at different rates, without overloading the system. Much of that model is built with lossy handling in mind - it makes sense that when your system is under duress, that you design your streams to degrade gracefully (e.g. drop certain events, or rate limit them by chunking into windows, etc).

Partitioning RxJS streams: adventures in nested Observables with groupBy() and flatMap()

One of the confusing aspects about working with streams is diving into Rx operators that take a stream and fan out into multiple streams.

Strange Loop 2015: Notes & Reflections

Going to Strange Loop was a huge check off my conference bucket list (lanyard?). I’d always heard about this slightly-weird, highly academic collision between academia and industry, skewing toward programming languages you haven’t heard of (or, at the very least, you’ve never used in production). I anticipated sitting at the feet of gray-haired wizards and bright-eyed hipsters with Ph.Ds.

Notes on performance tuning a Puma server

A couple of months ago, I was tuning a Rails app for one of our clients. This client wanted to know how performant their app would be under load.

Toolbox: learning Swift and VIPER

The following are some notes I’m compiling as I’m beginning a journey down the rabbit hole, writing an app in Swift utilizing the VIPER app development methodology

Building GPX stats through FRP principles with Bacon.js

With my current fascination with tracking workouts and location-based-activities, I have been interested in how I might be able to rewrite some of my stats logic with FRP principles.

Docker, Rails, and Docker Compose in your development workflow

(This post originally appeared on the Carbon Five blog.)

Explorations in logic programming

Out of Storybook, a side project I’ve been doing for a friend, I had the opportunity to model the problem domain as a constraint satisfaction problem (CSP). It goes:

My own robot training buddy.

As an ultra runner, I am really into the mountains. As a software engineer, I’m really into data. So naturally, I’m interested in the intersection of both.

Recap: QCon SF 2014

Blurb sent me off to QCon SF 2014 for three days.

QConSF: Day Three

Melody Meckfessel: Google/Cloud Engineering