Freelancer profile translated to English.
Back to original languageAbout Julien
Data/Cloud Architect
Choice of technical architectures, design, implementation, project management, implementation of best practices, developer coaching.
Expert in setting up technical architecture and in Open Source BI development (SQL Development, Pentaho, Jasper, BIRT, Talend, Dash by Plotly, Metabase, Oracle, Postgresql, Mysql, Unix).
Experience level = + 20 years
Implementation of data pipelines with the following languages and technologies:
- Scala
- Python
- Spark
- Airflow
- Micro-services
- Pubsub
- Kafka
Mastery of Cloud/Serverless concepts and the following cloud platforms:
- AWS (EMR, Glue Job, Lambda, Batch, ECS, RDS, Redshift, Step Functions)
- GCP (GCS, Dataproc, Composer, BigQuery, BigTable, StackDriver, Cloud functions, Cloud Run, Pub/Sub)
- Azure (Container Apps, Container Instance)
- Snowflake
- Devops: Terraform, Docker
Experience level = + 10 years
Design and development of reactive and collaborative web applications.
Development of APIs and microservices.
Languages/Frameworks: Django (Python), Phoenix (Elixir), Erlang, ELM, Javascript
Experience level = + 20 years
Seasoned and PMP-certified project manager to bridge the gap between business and technology.
English
Fluent
French
Native or bilingual
Can work on-site
Paris (up to 50km)
Experience
- LegalibAccompaniment mission for migration to Scaleway cloudSOFTWARE PUBLISHINGFebruary 2026 - Today (6 months)Angers, FranceMigration of the Paie by Cobham solution, the mission including the choice of the most suitable Scaleway serverless solution and its implementation in IaC.The architecture of the payroll software, currently monolithic on a single server, has been redesigned for performance, scalability, and maintenance reasons.After comparison with Scaleway's various serverless services, a migration of the applications into a Kubernetes Kapsule cluster was carried out.Technologies: OpenTofu (terraform), Kubernetes, ArgoCD, Keda, External Secrets Operator, MinIO, Prometheus, Grafana, RabbitMQ, Java, PostgreSQL
- R-NWData/Cloud ArchitectENERGY AND UTILITIESSeptember 2025 - February 2026 (5 months)Paris, FranceSetting up a secure and scalable architecture from scratch on GCP based on, among others, the following technologies:- Kubernetes / Prometheus / Grafana;- Kafka and Flink for real-time telemetry data processing.Devops: Tofu, Github Actions, KubernetesReal-time: Apache Kafka, Apache Flink, MQTTDevelopment: Python, FastAPI, Prometheus, GrafanaBigData: Starlake, Airflow, BigQuery, Pubsub, GKE
- ZE ENERGYData Architect/EngineerENERGY AND UTILITIESOctober 2024 - August 2025 (10 months)Paris, FranceSetting up a complete data platform based on GCP for a startup in the energy sector.- Definition of the data platform architecture on GCP;- Business modeling of the BigQuery database;- Infrastructure as Code with Terraform;- Design and development of data pipelines for populating the Data Lake;- Development of a supplementary web application to monitor the unavailability of ZEEnergy assets (power plants, solar panels, batteries, etc.);- Implementation of processes and coaching of data scientists;- Application and technical maintenance.Technical environment: GCP: BigQuery, Cloud Run, Scala, Spark, Airflow, Starlake, Python, Terraform, SQL, Elixir
Reviews
J
Jeremy
ZEWAY
Reviewed on 3/25/2022
Julien helped us set up a data processing system (ETL, data purging, data cloud setup). I highly recommend Julien, who is attentive, quickly understands needs and challenges, and advised us well on the approach.
Then, the implementation was very smooth, well executed, designed for easy maintenance (terraform, cloudwatch log setup, gitlab project..) and well documented.
Thank you Julien!
Guillaume
Trajaan
Reviewed on 12/6/2022
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Education
- EngineerEISTI - International School of Information Processing Sciences2004Diplôme d'ingénieurs BAC+5 Mathématiques - Physique - Statistiques Conception - Programmation Spécialité de dernière année => Business Intelligence
- Project Management Professional (PMP)® CertificationProject Management Institute2012