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Federico Pereiro
Verified Expert in Engineering
Open Source Developer
Leiden, Netherlands
Toptal member since November 4, 2015
Bio
Federico is a full-stack JavaScript developer and open source contributor. He works remotely with international customers, specifying, implementing, and provisioning web applications. His focus is on developing radically simple systems for solving complex problems.
Portfolio
Kirncroft Engineering Ltd
Node.js, Agile Software Development, JavaScript
Sora
React, PostgreSQL, Sequelize, Redis, Node.js
Novisci
CSS, HTML, MongoDB, Redis, Node.js
Experience
- JavaScript - 10 years
- Node.js - 10 years
- Functional Programming - 8 years
- Vim Text Editor - 8 years
- Open Source - 7 years
- Redis - 7 years
- Git - 7 years
- Unix - 6 years
Work Experience
Production Scheduler
2020 - 2021
Kirncroft Engineering Ltd
- Developed a web-based system for production scheduling to replace an existing VBA/Excel system.
- Designed and documented the scheduling logic to make it idempotent and consistent while maintaining utmost flexibility.
- Designed and implemented the UI for the system, including Gantt charts.
Technologies: Node.js, Agile Software Development, JavaScript
Senior Back-end Developer
2019 - 2019
Sora
- Added core functionality to the back end of an application.
- Designed and implemented an integration test suite.
Technologies: React, PostgreSQL, Sequelize, Redis, Node.js
Back-end Developer
2018 - 2019
Novisci
- Created a suite of tests for existing software.
- Developed a tool for managing EC2 instances and a UI for performing common tasks related to instance management.
- Refactored and improved parts of the existing codebase.
- Worked on provisioning scripts to streamline the development cycle.
Technologies: CSS, HTML, MongoDB, Redis, Node.js
Senior Back-end Developer
2017 - 2018
IP2
- Designed and implemented a set of standalone servers to interact with physical entertainment attractions.
- Created a set of functional web admins to manage data and configure the aforementioned servers.
Technologies: API Design, HTML5, Redis, Node.js, APIs, Back-end, Solution Architecture
Lead Back-end Developer, DevOps
2014 - 2016
Pixowl
- Undertook a complete rewrite of the Node.js back end, which was completed successfully under significant time pressure.
- Set up provisioning, monitoring, and automation for a successful worldwide launch of a new mobile game.
- Rewrote the file system module of the application, solving most reliability and performance issues.
- Maintained and expanded the code and infrastructure to support additional features and multiple games.
Technologies: API Design, Docker, Elasticsearch, Redis, Node.js, MySQL, Architecture
Programmer, DevOps
2013 - 2013
Hinch.as
- Wrote development stories to help set priorities for the development team.
- Developed large sections of the back-end logic (including a REST endpoint to support an autocomplete for geographical information).
- Set up provisioning, monitoring, and automation for the infrastructure.
Technologies: Amazon Web Services (AWS), AngularJS, MongoDB, Redis, Node.js
Programmer, DevOps
2012 - 2013
Inaka
- Debugged and added features to Rails and Erlang applications.
- Handled stress testing of existing applications using Node.js.
- Deployed, automated, and monitored tasks for applications running on AWS.
Technologies: Unix, Puppet, Redis, Node.js, Erlang
Technology Lead
2011 - 2012
Picoresa
- Handled functional analysis of the platform.
- Organized the transition from the old version of the platform to a new one, helping find the team and organizing development.
Technologies: Node.js, PHP
Financial Analyst, Developer
2009 - 2010
Darwin Inversiones
- Designed tools for rapid information retrieval from diverse data sets with public company information.
- Designed and implemented a macro for retrieving, organizing, and presenting financial information from Capital IQ.
- Designed and implemented a macro for taking a set of internal spreadsheets and updating them with information from Capital IQ.
Technologies: Visual Basic, Capital IQ
Project History
Ustack – A Web Application Stack Focused on Understanding
http://github.com/fpereiro/ustackDesigned, developed, and maintained a stack of open-source JavaScript libraries for building web applications.
The stack comprises front- and back-end features and is composed of ten libraries: dale (functional loops), teishi (validation), lith (HTML/CSS generation), recalc (event system), cocholate (DOM manipulation), gotoB (a front-end framework integrating the previous five libraries), cicek (a web server), giz (an authentication layer), astack (asynchronicity) and kaboot (devops toolset).
The ustack has been forged through radically minimizing the lines of code of each of its libraries. The entire ustack actually cannot be more than 4096 lines (2048 front-end + 2048 back-end).
The stack comprises front- and back-end features and is composed of ten libraries: dale (functional loops), teishi (validation), lith (HTML/CSS generation), recalc (event system), cocholate (DOM manipulation), gotoB (a front-end framework integrating the previous five libraries), cicek (a web server), giz (an authentication layer), astack (asynchronicity) and kaboot (devops toolset).
The ustack has been forged through radically minimizing the lines of code of each of its libraries. The entire ustack actually cannot be more than 4096 lines (2048 front-end + 2048 back-end).
Backendlore
https://github.com/fpereiro/backendloreA detailed technical document specifying how I write back ends for web applications. It covers server architecture, stack decisions, authentication, validation, code structure, provisioning, and maintenance.
OneMillionLoops
An application for musicians of all ages and skill levels. Create bands with matching loops of multiple instruments and genres. Practice, jam, and compose with fresh music always!
I am the CTO of the company and have implemented the front end and back end.
I am the CTO of the company and have implemented the front end and back end.
Education
2003 - 2009
B.A. Degree in Business Administration
Universidad Torcuato di Tella - Buenos Aires, Argentina
2003 - 2008
B.A. Degree in Political Science
Universidad Torcuato di Tella - Buenos Aires, Argentina
Skills
Libraries/APIs
Node.js, REST APIs, jQuery, React, Vue
Tools
Git, Vim Text Editor, BrowserStack, Puppet, Sequelize
Languages
JavaScript, HTML5, HTML, CSS, Visual Basic, PHP, Erlang
Frameworks
Vanilla JS, Chrome, AngularJS
Paradigms
Web Architecture, Requirements Analysis, Functional Programming, Microservices, Agile Software Development
Storage
Redis, Data Validation, Amazon S3 (AWS S3), Elasticsearch, PostgreSQL, MongoDB, MySQL
Platforms
Amazon Web Services (AWS), Amazon EC2, Unix, Linux, Docker
Other
Open Source, APIs, Architecture, System Design, API Design, Software Architecture, Back-end, Full-stack, Data Architecture, CTO, Solution Architecture, Capital IQ
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