Roberto Zanon - Senior backend software developer, Withings

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Work Background

WithingsDevOps - Senior Software Engineer

Jun. 2023Remote

8fitSenior Software Engineer

Dec. 2018 - May. 2023Berlin Area, GermanyI developed the Backend application that manages the fitness content and user state of the 8fit mobile apps. I mainly worked on: * the integration with the subscription and payment systems of Stripe, Google and Apple Store * the design and implementation of the database structure and API endpoints for serving the fitness content and handling user data * the implementation of a web interface used internally as a CMS for the fitness content. I was also responsible for monitoring and improving the performance of the Backend and for the security. I also designed and implemented a recommendation system to suggest specific fitness content to users based on their past behavior. It was built using the AWS services Amazon Personalize and AWS Step Functions; the step functions were implemented using the Python language.

MovingaSenior Ruby Developer

Aug. 2016 - Dec. 2018Berlin, Berlin, GermanyI've been working on development of the main RubyOnRails application about internal management of moves and on a REST API used by partner companies to manage their moves. I've also worked on the DevOps side on: * Maintaining the integration and deployment pipelines using Jenkins and Docker * Maintaining some internal tools written in Ruby used for the deployment * Maintaining internal services as: Gitlab, Jekins, Docker Registry * A migration of DNS and CDN from cloudflare to AWS Route53 and CloudFront I got to know the main AWS services as: EC2, S3, ElasticContainerService, Lambda, RDS, Route53, CloudFront, VPC, IAM, CloudWatch

WimduSenior ruby backend developer

Feb. 2016 - Jul. 2016Berlin, Berlin, GermanyI worked both on the main Wimdu web application and on microservices responsible to synchronize our database with 3rd party services. The main application was based on Ruby on Rails; the microservices were written in ruby and as a message bus used RabbitMQ. I also got experience in working regularly with tools as Puppet, Docker and Jenkins. Regarding the development process: I worked in a team that was using scrum framework.

7Pixel S.r.l.Xp Software Developer

Mar. 2009 - Jan. 2016Varese Area, Italy▪ (first ~2 years) Development of a distributed crawling system able to extract structured data about products from e-commerce web pages using machine learning techniques. The main technologies used were C#, Postgres, .NET Remoting for remote procedure call and Zeroconf protocol for services discovery ▪ (~5 years) Development starting from scratch of a big web application about price comparison: http://www.shoppydoo.it . The application was developed in a team that strictly followed extreme programming (and agile) principles and techniques like TDD (100% of test coverage :O ), pair programming, code collective ownership, continuous integration, fast feedback, simple design, ..... The main technologies used to develop this application were Ruby (using Sinatra web framework and ActiveRecord for ORM), Postgres, Redis, Nginx, HaProxy, Zabbix for monitoring ▪ (~5 years) Development of API and back-end ruby gems for the projects www.trovaprezzi.it (the biggest Italian price comparison web site) , www.shoppydoo.it and www.kirivo.it ▪ (last ~1 year) Development of a marketplace web application www.kirivo.it using the same methodologies and technologies listed before

S.I.C.I.M.I. S.n.c.software developer and system administrator

Jul. 2005 - Jul. 2006Milan Area, Italy▪ Development of ERP systems ▪ System administrator for internal services