Amadeus Folego

Developed the MVP from scratch based on a simple design guideline and created the subsequent features based on customer feedback and industry research.

Followed through funding, budgeting, hiring, marketing, and operation of the product with the co-founders.

The product has hundreds of car sharers and performs thousands of transactions monthly.

The technical stack is leveraged by a minimalist approach, supporting a robust, reliable, maintainable, and performant application.

Presumé allows companies to simplify the hiring pipeline by providing a pre-interview service that records candidates answers to predefined questions.

Every month several thousand candidates use the platform—saving countless hours for them and for the hiring managers as well.

I became involved in this project since it's inception—defining business and technological requirements for development of the MVP. However I was not tasked with developing it initially.

After the MVP was launched successfully, I was referred to freelance work by the original developer.

I joined as a technical partner and CTO since 2016.

Migrated the web interface from Sinatra (a full-featured web framework) to a bare-bones Rack application (which is already required by almost all web applications in Ruby).

This was achieved focusing on retro-compatibility, by implementing the specific parts of the Sinatra API being used by Sidekiq in Rack, reusing existing code and tests.

The implication is reduced memory footprint and request overhead for any application that relies on the web interface to monitor Sidekiq's operation.

The removal of Sinatra as a dependency also means faster and lighter bundling of gems for all applications that rely on Sidekiq—improving maintainability, developer setup, and deployment. This change has this effect even if the project isn't actually making use of the web interface.

Provides plugins and drivers for integration between Statesman (state machine library) and Sequel (an object-relational mapper).

While searching for an adequate tool for the implementation of state machine handling on models, I found Statesman, but there was no integration tool for Sequel.

So I gathered existing work to achieve this integration, performed changes for the new version of the library, created a plugin to avoid code repetition, and released this gem.

Borel is a gem for dealing with operations on intervals defined by objects that are ordered in Ruby.

This gem was created to solve real-world problems with scheduling of jobs that can be performed only on specific dates. Operations with intervals of these dates (intersection, union, negation) made this possible.