Raul is available for hire
Hire RaulRaul Guiu
Verified Expert in Engineering
Software Developer
Location
Málaga, Spain
Toptal Member Since
December 17, 2013
Raul is a software developer with over 20 years of commercial experience in multiple locations, including the UK, Spain, Gibraltar, Finland, the US, and France. He is technology agnostic and is enthusiastic about keeping up to date with the latest trends and investigating their possible applications to business problems.
Portfolio
Boldplay
JavaScript, Node.js, Pipelines, Docker, Amazon S3 (AWS S3), Private NPM Modules...
Consensys
Amazon Web Services (AWS), Ethereum, JavaScript
Amazon
Amazon Web Services (AWS), Java
Experience
Availability
Part-time
Preferred Environment
Amazon Web Services (AWS), Node.js, Java
The most amazing...
...thing I've won is the Hadoop Challenge Competition, for which the prize was a trip to Las Vegas to attend IBM's Information On Demand (IOD) 2011 conference.
Work Experience
Lead Software Engineer
2022 - PRESENT
Boldplay
- Automated deployments via CI/CD pipelines for multiple applications. Dockerized and utilized Ansible in conjunction with Bitbucket pipelines.
- Enhanced game libraries by segregating core code from specific game code, enabling updates to the core without redeploying 100+ games. Simplified Pixi code for improved responsiveness.
- Maintained a back-office application, establishing proxies to access data from various regions for centralized management.
- Optimized data querying by standardizing reporting and implementing a dynamic query system, enabling the selection of filters and grouping parameters.
Technologies: JavaScript, Node.js, Pipelines, Docker, Amazon S3 (AWS S3), Private NPM Modules, Ansible, Nexus
Developer
2017 - 2022
Consensys
- Developed a distributed poker platform based on Ethereum.
- Simulated a peer-to-peer (P2P) network with AWS IoT to handle communication, allowing decentralized poker games.
- Built an AWS Lambda serverless back end, with multiple lambdas coordinating player matching and data managing.
- Collected and processed analytics and regulatory events with Amazon Kinesis.
Technologies: Amazon Web Services (AWS), Ethereum, JavaScript
SDE
2015 - 2018
Amazon
- Worked on different products of the group.
Technologies: Amazon Web Services (AWS), Java
Java Contractor
2014 - 2015
Libon
- Contributed to the development of back-end APIs used by web, Android, and iOS.
- Developed new features and made performance improvements.
- Migrated parts of the data from Oracle to Cassandra.
- Worked in an Agile environment.
Technologies: Oracle, Cassandra, Hibernate, Spring, Java
Big Data Engineer
2013 - 2014
Social Point
- Built an anomaly detection system.
- Improved the stability and scalability of a system based in Redis for handling thousands of events per second.
- Implemented multiple applications for importing data from external sources.
- Wrote a workshop on MapReduce for the rest of the team with Mincemeat.py.
- Supported a data visualization tool in PHP and JavaScript.
Technologies: Cassandra, Redshift, Git, Python
Lead Java Developer
2012 - 2013
Odobo
- Identified and developed process improvements and tool requirements including a tool for importing database fixtures. Used multiple sources such as YAML and SQL batch files.
- Developed a routing application.
- Implemented a game back end.
- Created a web-based application for replaying games.
- Built an applications deployment framework.
Technologies: Git, Mercurial, Backbone.js, Node.js, JavaScript, PostgreSQL, Apache Maven, Guice, Spring, Eclipse, Hibernate, Java
Senior Ruby on Rails Developer
2009 - 2012
Victor Chandler (BetVictor)
- Developed a betting application in Rails.
- Implemented performance improvements including page caching (Memcached), combining files (CSS, JavaScript), and using cross domain calls to reduce HTTP header sizes.
- Handled troubleshooting and bug fixing, including writing scripts for diagnostic purposes.
- Developed a REST web service in Java, with Oracle and Coherence in the back end.
- Supported multiple legacy systems in Java and Ruby.
Technologies: Git, Memcached, Redis, MySQL, Java, jQuery, JavaScript, Ruby on Rails (RoR), Ruby
Java Contractor
2008 - 2009
VISA Europe
- Designed and led the development of a system for processing non-financial transactions. Simplified and improved the performance of the application by processing a batch of transactions as a single transaction.
- Developed a test framework for the reporting system by creating a serialized version of the processed data.
- Implemented multiple reports, with presentation of the data based on existing examples of legacy systems.
- Implemented an application scaffold to avoid using WebSphere during development.
- Improved the unit testing framework of the application.
Technologies: IBM Rational ClearQuest, IBM Rational ClearCase, Apache Maven, IBM Db2, Apache ObJectRelationalBridge (OJB), Rational Unified Process (RUP), RSA, Eclipse
Software Developer
2004 - 2006
Cantor
- Worked in a spread betting application.
Technologies: Spring, Java
Developer
2004 - 2004
Nokia
- Working as a Java contractor on a gateway that allowed multiple Nokia systems to send SMS messages.
Technologies: Java
Java Developer
2000 - 2002
Netdecisions
- Implemented an HTML form system using an in-house template system.
- Started as junior developer, was promoted to lead developer for some projects, and eventually became part of the company's core team.
- Worked on a distributed component framework (similar to EJB) as part of the company's core team.
- Worked as lead developer of a project (Pharmalogy) with 10+ developers, contributing to multiple tasks in order to complete the project on time.
- Developed clickmango.com as a junior Java developer.
Technologies: HTML, IBM Db2, Oracle, MySQL, Shell Scripting, JavaScript, Java
Experience
Hadoop Challenge Winner
I was one of the three winners of the Hadoop challenge.
Workshop Map Reduce
https://github.com/rguiu/MRWorkshop/Tutorial on how to write Map Reduce with mincemeat.py.
BetVictor
Betting website built in Ruby on Rails.
CodeJam Submissions - Multiple Years
Multiple years' submissions to Google Code Jam:
http://www.go-hero.net/jam/08/name/rguiu
http://www.go-hero.net/jam/10/name/rguiu
http://www.go-hero.net/jam/12/name/rguiu
http://www.go-hero.net/jam/13/name/rguiu
http://www.go-hero.net/jam/14/name/rguiu
http://www.go-hero.net/jam/15/name/rguiu
http://www.go-hero.net/jam/08/name/rguiu
http://www.go-hero.net/jam/10/name/rguiu
http://www.go-hero.net/jam/12/name/rguiu
http://www.go-hero.net/jam/13/name/rguiu
http://www.go-hero.net/jam/14/name/rguiu
http://www.go-hero.net/jam/15/name/rguiu
Finalist in Paris Google Hashcode 2015 Competition
https://sites.google.com/site/hashcode2015/competition-overviewGot into the final round in Paris.
Skills
Languages
Java, Ruby, JavaScript, Python, HTML, CSS
Frameworks
Spring, Ruby on Rails (RoR), Serverless Framework, Guice, Rational Unified Process (RUP), Hadoop, Flask, Hibernate
Storage
Cassandra, MySQL, Redis, IBM Db2, Memcached, PostgreSQL, Redshift, Amazon S3 (AWS S3)
Other
Facebook Ads, RSA, Apache ObJectRelationalBridge (OJB), Shell Scripting, Lambda Functions, Serverless, Pipelines, Private NPM Modules
Tools
Git, Mercurial, IBM Rational ClearCase, IBM Rational ClearQuest, IntelliJ IDEA, Shell, Apache Maven, Ansible
Paradigms
Agile Software Development, Concurrent Programming, Serverless Architecture, Functional Programming
Platforms
Linux, Eclipse, OS X, Ethereum, Oracle, AWS Lambda, Amazon Web Services (AWS), Docker, Nexus
Libraries/APIs
Backbone.js, Node.js, jQuery, Facebook Ads API
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