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Emilie SiciliaES

Emilie Sicilia

Supermalter

Backend Developer Golang

€700/day
2 projects
Paris, FR
8-15 years

Average response time: 1 hour

About Emilie

Hello there !

I'm a Senior Backend Developer with over 10 years of experience, currently focused on Golang, microservices architectures, and legacy system modernization.

I help engineering teams design and implement scalable, maintainable, and high-performance backend systems. While using the newest techno is always fun, I aim on delivering real business value over chasing trends and overengineering.

🌐 Tech stack & tools I’m confident with:
- Languages: Golang (main) + Python, Java (occasional)
- Cloud: AWS & GCP
- Commonly used techno: Kafka, Elasticsearch
- Containers & Orchestration: Docker, Kubernetes,Terraform
- CI/CD & Observability: GitHub Actions, Datadog, Kibana

🚀 I typically join teams to:
- Redesign or build backend systems from scratch
- Drive migration to microservices architecture
- Make technical choices and improve codebase quality
- Support or mentor developers during high-stakes projects

Long-term missions preferred – remote or hybrid (Paris)
Recommandations available on demand.
  • French

    Native or bilingual

  • English

    Fluent

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

Experience

  • Reezocar
    Senior Backend Developer
    E-COMMERCE
    March 2021 - Today (5 years and 3 months)
    Boulogne-Billancourt, France
    Revamped the scraping stack, enabling integration of new data sources 3x faster and reducing weekly errors from 4–5 to nearly zero.

    Explored third-party APIs and mobile apps to extract valuable data efficiently.

    Bootstrapped our monorepo, including the first microservices and a complete CI pipeline.

    Integrated payment solutions (Adyen, Fintecture) to support a seamless checkout experience.

    Connected Salesforce to our internal systems, making our sales's life easier and accelerating results for clients.

    Collaborated closely with product and sales teams to identify and implement multiple quick wins.

    Provided hands-on support for complex debugging issues — I genuinely enjoy solving problems.

    ...and contributed to many other technical initiatives across the stack.
    GO Amazon Web Services Elasticsearch Refactoring Gestion de projet
  • Qonto
    Backend Developer
    BANKING AND INSURANCE
    September 2019 - March 2021 (1 year and 6 months)
    Paris, France
    Transfer Feature Team: Designed and implemented the reception of international transfers via SWIFT, ensuring secure, compliant, and efficient processing.

    3rd-Party API Team: Developed and deployed authentication flows using Ory Hydra, strengthening security and improving third-party service integrations.

    DevOps collaboration: Worked closely with the DevOps team to integrate ArgoCI, streamlining and accelerating CI pipelines.

    Actively contributed to debugging and troubleshooting across teams, helping resolve production issues and improve system resilience.
    Golang Apache Kafka DevOps API PostgreSQL
  • Objenious - By Bouygues Télécom
    Backend Developer
    INTERNET OF THINGS (IOT)
    October 2016 - September 2019 (2 years and 11 months)
    Sèvres, France
    Designed, developed, and maintained APIs for client data analysis, leveraging Google BigQuery and CassandraDB to support large-scale analytics.

    Implemented integrations with third-party platforms such as SFTP, webhooks, Google/AWS/Azure IoT solutions.

    Built real-time monitoring tools for IoT network performance, enabling proactive issue detection and system optimization.

    Developed a robust end-to-end alerting system to ensure rapid response to critical events.

    Contributed to numerous smaller initiatives and enhancements across the platform, supporting overall system reliability and scalability.
    Google cloud Internet des objets Telecommunications GO Résolution de problèmes

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Education

  • Master MIAGE
    Université de Nice
    2014

Skill set

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