Profileimage by Samuel Rizzo Senior Java / Ruby on Rails Full Stack Developer from Berlin

Samuel Rizzo

available

Last update: 30.10.2023

Senior Java / Ruby on Rails Full Stack Developer

Company: Upbits OÜ
Graduation: not provided
Hourly-/Daily rates: show
Languages: English (Full Professional) | Portuguese (Native or Bilingual)

Attachments

Samuel Rizzo CV.docx

Skills

Java, Spring Boot, Ruby on Rails, React, Vue.js, Kubernetes, Docker, AWS, Microservices, DevOps, Jenkins, Continuous Delivery, Agile, Scrum, Kanban

Project history

06/2017 - Present
Senior full stack developer | Freelancer
Freelancer

Independent consultant for multiple clients and projects:
  • Helped a fast-growing German used-car portal build and launch an important and strategic product. Skills: Kotlin, Java, Microservices, Spring Boot, AWS, Kinesis, Kubernetes, Docker, Terraform
  • Helped an online marketplace adopt Elasticsearch and increase 33x performance. Skills: Elasticsearch
  • Helped two German potential co-founders with the development of a fully functional prototype. Skills: Ruby on Rails, ActiveAdmin, MySQL
  • Interim tech lead for a German online catering platform. Skills: Ruby on Rails, Vue.js, AWS, Cloud66, Semaphore CI, PostgreSQL, Scrum
  • Multiple projects for XING. Skills: Ruby on Rails, React, Redux, REST APIs, RabbitMQ, MySQL, Jenkins, Docker, Kubernetes

09/2015 - 05/2017
Senior developer, Ruby on Rails | XING
XING

Permanent position at the massive German career-oriented social network.
  • Developed scalable and highly available software that served 12+ million users, hundreds of requests per second.
  • High performing, Continuous Delivery/Agile/Scrum environment
  • Mentored, interviewed, and onboarded multiple working students, new employees, and freelancers.
Skills: Ruby on Rails, REST APIs, RabbitMQ, MySQL, Jenkins, Scrum

08/2014 - 07/2015
Full stack developer, Ruby on Rails | Meetyl
Meetyl

Joined Meetyl, a startup that connected companies and investors.
  • Shipped high-quality software in a fast-paced environment
  • Rewrote the Elasticsearch-based company/investor search and matching engine with improved performance and maintainability
  • Introduced a Hadoop/Hive-based solution that enabled ingestion and analysis of millions of records of financial data
Skills: Ruby on Rails, Elasticsearch, AngularJS, Hadoop, Hive

10/2012 - 06/2014
Senior software architect, Java | Capgemini
Capgemini

Worked for Capgemini as a consultant at the Brazilian National Agency of Petroleum, Natural Gas and Biofuels.
  • Was part of the software architecture team, overseeing multiple projects and teams
  • Developed and maintained enterprise-wide shared components
  • Provided architectural guidelines and assessed code quality and adherence to it
Skills: Java, Java EE 6, JPA 2, EJB 3.1, CDI, Jenkins, Sonar, Weld, JBoss Seam 3, JSF 2.1, PrimeFaces 4, JBoss EAP 6.1, Oracle, SOAP and RESTful Web Services (JAX-WS and JAX-RS, JAXB), Maven, UML

08/2011 - 04/2012
Tech lead, Java | Spassu Tecnologia e Serviços
Spassu Tecnologia e Serviços

Permanent employment at Spassu’s software house.
  • Tech lead of 3 small teams
  • Full stack development
  • Software architecture of multiple projects
Skills: Java, JBoss Seam 2, RichFaces 3, JBoss AS 5, MS Sql Server, Oracle, UML

12/2010 - 08/2011
Senior software architect, Java | CTIS
CTIS

Worked for CTIS as a consultant at the Brazilian National Agency for Cinema.
  • Maintained a custom Java framework and components, shared by all projects
  • Provided technical support and architectural guidelines to an external software provider
Skills: Java, Jenkins, JBoss Seam 2, RichFaces, JPA 1, Oracle, JBoss AS 5, UML

10/2009 - 11/2010
Senior full stack developer, Java | FEMAR - FUNDAÇÃO DE ESTUDOS DO MAR
FEMAR - FUNDAÇÃO DE ESTUDOS DO MAR

Worked for Brazilian’s Navy Systems Analysis Center on the rewrite of their maritime commerce operations game-like simulator, used for educational purposes in one of their instruction centers.
  • Developed the Java/Spring/Hibernate backend
  • Contributed to the development of the Adobe Flex frontend
Skills: Technologies: Java 5, Spring 3, Hibernate 3, Ehcache, Adobe Flex 3, MySQL

10/2007 - 02/2009
Full stack developer, Java | Ideais Tecnologia
Ideais Tecnologia

Developer at Ideais, a software house. Full stack development of multiple projects of multiple clients
Skills: Java, Spring 3, Struts 2, Hibernate 3, Prototype, JQuery, Selenium, Oracle, MySQL

04/2007 - 05/2007
Java developer | Victus Consultoria
Victus Consultoria

Short contract as a Java developer. Skills: Java, EJB 3, JPA, Struts 1

12/2006 - 03/2007
Java developer | M.I. Montreal Informatica
M.I. Montreal Informatica

Permanent employment as a Java developer in a software house. Skills: Java, Struts 1, EJB 2, JDBC, Oracle, UML. 

07/2006 - 10/2006
Java developer | Synos Technologies
Synos Technologies

Short internship, already in my first semester at University. At that time, I was already a Sun Certified Java Programmer, and shortly after became a Sun Certified Web Components Developer. Skills: Java, JDBC, Oracle

Local Availability

Open to travel worldwide
European citizen, available to travel / relocate inside the EU.

Other

I'm a freelancer specialized in Java, React, Ruby on Rails, and AWS. I have over 14 years of combined experience as a Full-stack Developer, Software Architect, and Tech Lead, accumulated across well-established companies as well as early-stage startups.
Profileimage by Samuel Rizzo Senior Java / Ruby on Rails Full Stack Developer from Berlin Senior Java / Ruby on Rails Full Stack Developer
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