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Mathison is a mission-driven and venture-backed technology platform that equips employers with a holistic solution to activate their diversity hiring in one place. The technology delivers top-of-funnel diversity sourcing, a system to reduce bias in hiring, and tools to mobilize the entire workforce in their hiring efforts.

SWAP are focused on building a payments infrastructure that empowers Fintechs by simplifying all the complexity involved with payment processing. During my time as Senior Software Engineer I used mainly the Elixir programming language, and impacted our results by: - Reducing the response time on the hosted Ledger product by two orders of magnitude by optimizing SQL queries and adding an adequate database denormalization strategy. - Fully rewriting the bank transfers API, removing unnecessary microservices and concentrating key parts in the core Elixir application. - Supervising coding tests and provide candidate feedback for the recruiting process.

Brought some projects to life at OKN using mainly Laravel, PHP and PostgreSQL

Implemented a few Bitcoin and cryptocurrency automated trading systems for private investors, using mainly Elixir, Typescript and React.js.

• Oversaw the maintenance and support of technical requests and refactored the architecture of the in-house commodity trading software. • Reorganization of the internal development processes, adoption of a more transparent version control system (Git/Github) and the use of agile methodology for development and deployment. • Improvement of the software’s performance and stability monitoring systems, with automatic e-mail notifications in the event of critical failures. • Several performance improvements through SQL code optimization and more memory-efficient C# code. • Assist the trading desk in understanding and planning new features, while also fixing wrongly implemented existing functionality. • Projected the migration of the software to run on the Amazon Web Services Cloud, with the goal of enabling on-demand horizontal scaling during access peaks.

• Oversaw the transition from Team Foundation Server to Github and helped improve the development workflow by providing training and remote support to the development team on how to effectively use Git and Github. • Saved the team from countless hours of tedious work by implementing a continuous integration process for the production of internal NuGet packages, coupled with a release management scheme using AppVeyor. • Provided frequent remote training and support to the London development team and other remote collaborators, offering mentoring via remote pair programming to solve performance issues and bugs in general. • Visited the London office in September 2015 to provide training to the development team on the following topics: Git & Github; Containerization & Docker; Test-driven development in Visual Studio with NCrunch.

Developed an application that imports data from different sources and formats (including Metastock), calculates some proprietary technical indicators and aggregate it in a web dashboard, which is used to support investment decisions in stocks, foreign exchange and derivatives markets.

1234ENTER was a Brazilian Start-up that provided a B2B service to help small and medium-sized business to effectively utilise Internet marketing strategies and leverage sales. I was part of the elaboration and implementation in the alpha phase of the service, while also being responsible for designing and maintaining the Cloud infrastructure. The application’s design comprised a Rails front-end backed by Resque background workers, which retrieved data from the customers’ Google Analytics accounts and performed several proprietary calculations on it to arrive at market metrics. These metrics were in turn used to generate custom-tailored actionable recommendations for their businesses. Depending on the recommendations the software arrives at, specific support material was then presented to the end user in the form of videos, tutorials, interactive tools, case studies etc.

PayCell was a cell phone-based payments system that relied on PIN authentication to perform transactions. I was hired by its founder as a software engineer to create the proof-of-concept application for presenting to potential investors. Using Ruby on Rails in conjunction with an Asterisk VOIP Gateway I was able to produce a fully working demonstration of the intended system in viable time for it to be presented to potential investors, despite budgetary limitations. • Designed the architecture and created the code, tests and cloud infrastructure for the application. • Created a small DSL in Ruby for writing the Interactive Voice Response (IVR) scripts. These plain Ruby scripts are executed when the system answers and place calls, allowing the communication between the Rails application and the VOIP Gateway via the AGI (Asterisk Gateway Interface) protocol. • Created a series of customised Capistrano recipes to expedite the deployment of new features and automate the generation of audio announcement files using the standard OS/X voice, enabling new ideas and features to be presented as quick as possible to interested investors.

• Total refactoring of the framework’s architecture, overseeing the transition of a VB.NET codebase to C# and improving the implementation by massively reducing the codebase size. • Elimination of a sizeable chunk of duplicated code by relying heavily on the use of generics and replacing several routines by well-known public domain algorithm implementations whenever possible. • Design and implementation of an aggressive caching mechanism used by the Framework, supporting multi-threaded access to data in memory whilst keeping it current by means of an elaborate inter-server notifications system. Abstracted the complexity behind this system away from the programmers using the Framework to create websites. • Improvement of the company’s infrastructure and culture, introducing practices such as version control and code reviews.

Ministered classes in Visual Basic 6.0 and coordinated a team of 4 developers to migrate a legacy application from MUMPS to a more modern stack (VB6 with SQL Server).