Amir Sefidian
Senior Data Scientist
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolAmir Sefidian is a senior data scientist and machine learning engineer based in Berlin with nearly two decades of computer science experience and nine years focused on ML in production. He currently improves search and reranking for Vinted’s 100M+ users, driving higher relevance and measurable lifts in transactions and GMV through automated retraining and monitoring systems. His background spans algorithmic trading—where he cut walk-forward optimization time by 83% and boosted portfolio RoR—and large-scale recommendation engines that materially increased CTR and conversion metrics. Amir also builds end-to-end ML services (from audio source separation to intent detection), authors educational content for 12K+ monthly learners via Sefidian Academy, and blends strong software engineering practices with research-grade modeling. Notably, he combines production-grade ML monitoring and profiling with hands-on optimization frameworks, making models both performant and robust in real-world systems.
9 years of coding experience
14 years of employment as a software developer
Master's degree, Computer Software Engineering, GPA: 4.0/4.0, Master's degree, Computer Software Engineering, GPA: 4.0/4.0 at Shahid Rajaee Teacher Training UniversityHigh School Diploma, Mathematics & Physics, GPA: 19.75/20, High School Diploma, Mathematics & Physics, GPA: 19.75/20 at Kosaran High School
English, Persian, German
Stackoverflow
361reputation
27kreached
0answers
9questions
Github Skills (30)
amazon9
s3-bucket9
batch8
multithreading8
amazon-s38
minio7
parallel7
aws-s37
multi-process6
nested-loops6
cluster-analysis6
entropy6
flask6
information-theory6
lstm6
Programming languages (3)
Github contributions (5)
iamirmasoud/disaster_response_app
Apr 2020 - Nov 2022
Implement ETL, NLP, and ML pipelines and a Web App to classify Figure Eight disaster messages
Contributions:1 PR, 10 pushes, 1 branch in 2 years 7 months
pythonsklearnflasknatural-language-processingml-pipelines
iamirmasoud/bulkboto3
Mar 2022 - Jul 2022
Python package for fast and parallel transferring a bulk of files to S3 based on boto3!
Contributions:2 releases, 1 review, 27 commits in 3 months
multithreadingpythonparallelamazon-s3boto3
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