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Otmane SefianiOS

Otmane Sefiani

Backend Developer Go / PHP

€600/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Otmane

Backend developer with over 10 years of experience, specializing in Go microservice design and high-traffic PHP / Symfony application development. Strong command of the AWS ecosystem, REST API design, PostgreSQL databases, and CI/CD pipelines. Experience in mentoring as a Lead Developer.
  • French

    Native or bilingual

Can work on-site
Paris (up to 50km)

Experience

  • MYM
    Backend Developer Go / PHP
    SOCIAL NETWORKS
    November 2022 - Today (3 years and 8 months)
    Paris, France
    • • Maintenance and development of new features on a Symfony monolith (PHP).
    • • Design and evolution of Go microservices (payment, media, messaging, notification).
    • • Deployment and operation on AWS: ECS, Lambda, SNS/SQS, media storage on S3.
    • • PostgreSQL database administration and optimization.
    • • Setup and maintenance of CI/CD pipelines (automated tests, build, deployment).
    • • Design of REST APIs for partners.
    Payment Service
    ◦ ◦ Integration of new PSPs (Payment Service Providers).
    ◦ ◦ Implementation of a payment orchestrator for CIT transactions, automatic renewals, and various payment flows.
    Notification Service
    ◦ ◦ Setup of an AWS SNS-based notification system for multi-channel broadcasting (email, SMS, web app notifications, webhooks).
    ◦ ◦ Dynamic management of message types and targets based on application events.
    Technologies: Go, PHP, Symfony, AWS (ECS, Lambda, SNS/SQS, S3, IAM), PostgreSQL, DynamoDB, CI/CD, REST API
    AWS PHP Golang SQL CI/CD
  • France TV Publicité
    Full Stack Developer & Lead Dev
    January 2018 - January 2022 (4 years)
    92100 Boulogne-Billancourt, France
    Lead Developer February 2021
    • • Participation in the redesign of the Adspace Digital application.
    • • Evolutionary and corrective maintenance of the Metaproxy infrastructure.
    • • Launch of the Metaproxy Live service, developed in Go.
    • • Implementation of functional and unit tests, and load testing.
    Technologies: PHP, JavaScript, HTML5, CSS, Angular, Go, AWS, Oracle
  • The Moneytizer
    Full Stack Web Developer
    January 2016 - January 2018 (2 years)
    Paris, France
    • • Creation of WordPress and Prestashop plugins.
    • • Evolutionary and corrective maintenance of The Moneytizer infrastructure.
    • • Automation of commercial prospecting.
    • • Development of a Google Chrome extension.
    Technologies: PHP, JavaScript, HTML5, CSS, AngularJS, MySQL

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Education

  • Master II
    EPSI Bordeaux
    2015
    Master II
  • Computer Science Degree
    EPSI
    2012
    Licence en informatique

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