Thomas Griozel
Data / Backend Engineer - Tech lead
1 recommendation
Salary / Daily rate
1 person recommend
Aix-en-Provence, France
Mobility: Paris, Marseille
Freelance, open to permanent contract
Can come onsite
Skills
Languages
Work experience
Backend Engineering - Freelance
BeReal.Freelance
Mar 2025 - Present
1 year 8 months
Remote, OR 97458, USA
Conception & implementation of backend code & infrastructure. Product ideation, experimentation and delivery of: - Users search (quickly find someone among tens of millions of people) - New comments experience (sub-comments, emojis reactions) - Content-moderation (complex data flows involving several 3rd party integrations)
Lead Data Engineer
SPARTEO
Jan 2025 - Mar 2025
3 months
Remote, OR 97458, USA
I have led the whole Data Engineering team. My main achievements : - Redefined the role and ownership of the team within the org (split from infra, closer to Data Science) - Improved the data aggregation strategy for critical tables (using ClickHouse) - Streamlined the data migration procedures - Built a strong roadmap for a year worth of work in collaboration with the CTO Almost no upcoming project required producing code, so I decided this role was not for me
Contentsquare
Feb 2021 - Jan 2025
4 years
Remote, OR 97458, USA
Tech lead co-pilot - acquired companies integration
Dec 2023 - Jan 2025
1 year 2 months
Remote, OR 97458, USA
- Leading the data dual-write initiatives to blend the features of Heap, Hotjar & CS together - Strategic cross-companies and cross-stacks system design and development - Implementation in Python, GoLang, Scala
Tech Lead - data mapping
Jun 2023 - Dec 2023
7 months
Remote, OR 97458, USA
- Roadmap planning & execution, cross-team (app, data science & engineering) coordination - Software Craftsmanship & Functional Programming advocacy and expertise - Team performance reviews. Objectives, morale, and bus-factor monitoring
Senior Data Engineer - merch product
Feb 2021 - Jul 2023
2 years 6 months
Remote, OR 97458, USA
- Design & implementation of back-end components (Kafka, Scala, Akka, Cats, Terraform, k8s…) - Creation, optimization & debug of massive SQL queries (ClickHouse, distributed systems…) - Revamp of our products ingestion solution to support 100x larger catalogs (GoLang, S3) - Leading the company-wide migration from Akka to Pekko
Staff Data Engineer
Change.org
Jan 2020 - Mar 2021
1 year 3 months
7620 Paris, Denmark
Leveraging the data of almost half a billion users to improve the reach of petitions: - Revamping the recommendation pipeline (Scala, Spark, Python, Airflow) - Design and implementation of a Machine Learning enablement framework (Scala, Spark, Terraform) - Setting new coding, testing, deployment and collaboration standards within the Data team
Senior Data Engineer
Early Birds
Dec 2018 - Jan 2020
1 year 2 months
7620 Paris, Denmark
Creating software (Scala, GCP) & improving our ML stack serving millions of recommendations / day: - Driving architectural changes like functional-style exceptions handling with Cats, complete code revamps with Akka Stream, improvement of Spark-based tools, setting up monitoring (Kamon, Prometheus) - Development of the user sessions aggregation job with Apache Beam (Dataflow). BigQuery and BigTable used for data storage. Implementation of batch (BigQuery) and streaming (PubSub) modes - Architectural study and implementation of a dynamic router using the Envoy proxy. Development from the ground up of an associated control plane using Akka HTTP. Full Integration with Kubernetes - Creation of an orchestrator using Akka Stream, Alpakka, Doobie (PostgreSQL access)
Data Engineer
Tinyclues
Mar 2017 - Oct 2018
1 year 8 months
Greater Paris Metropolitan Region · On-site
Scaling Tinyclues as a main actor in the design and development of our brand new data pipeline: - Developing several software components (using Scala, Play, Akka, Amazon AWS) - Building the main data ingestion job with Spark (Scala, Amazon EMR) - Creating a central event referential used by every team and product (Protobuf, RabbitMQ) - Taking part in the maintenance of the legacy stack (Python)
Backend Software Engineer
Zendesk
Jul 2016 - Mar 2017
9 months
Montpellier Area, France
Development of the analytics product of Zendesk (Explore), I worked mainly on: - The data engine, written in Scala, extensively using Akka actors - The application backend and REST API, powered by Ruby on Rails - Amazon Web Services (AWS) to host and distribute everything
Backend Software Engineer
ShopStyle
Jul 2014 - Jan 2016
1 year 7 months
San Francisco, CA, USA
- Development and debug of the website REST API and backend - Complete revamp of the internal applications backend - Use of Java, Scala, MySQL, MongoDB, Hibernate, HTML on AWS
Embedded Software Engineer
Wyplay
Oct 2012 - Jul 2014
1 year 10 months
Mexico City, CDMX, Mexico
Development of Canal+ set-top box middleware : - Middleware component design and development (C, C++, shell, DBus) - Linux kernel development and debug (C, gdb) - Driver development and debug (NAND, WiFi, I2C peripherals) - Schematics analysis, BSP development for multiple hardware
Education
Polytech Marseille
Master's degree, Computer Science
2009 - 2012
3 years 2 months