Daniel Segal - Data & Software Engineer

Daniel Segal

Data & Software Engineer

Berlin, Germany

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Summary

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Senior

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Daniel Segal is a Data & Software Engineer with 11 years’ experience turning complex datasets into reliable, production-grade systems for startups, research institutions, and media companies. He designs and operates large-scale ETL pipelines, high-volume web crawlers, and analytics frameworks using Python, SQL, Snowflake, and AWS, with a strong emphasis on performance and observability. His background spans building visualization and modeling tools at MIT for fusion engineering, improving streaming analytics at Condé Nast, and aggregating tens of millions of musician profiles to drive marketing at Sessions. As an independent consultant he now delivers end-to-end solutions—from multilingual content pipelines to real-time e-commerce insights—while leading technical scope and delivery. An active open-source contributor, he has refined Rails authentication flows and helped polish the Julia language website UI, reflecting a pragmatic full-stack fluency that bridges research-grade modeling and customer-facing products.

11 years of coding experience

6 years of employment as a software developer

Master of Science - MS, Computational Science, Master of Science - MS, Computational Science at Massachusetts Institute of Technology

Bachelor of Science - BS, Engineering Physics, Bachelor of Science - BS, Engineering Physics at University of Wisconsin-Madison

Stackoverflow

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Github Skills (25)

ruby-rails10

devise10

api-design10

css10

responsive-design10

user-authentication10

authentication10

rails10

ruby10

html10

website-design10

website-development9

frank9

bootstrap9

json-api9

Programming languages (16)

CSSC++TeXHandlebarsRAMLGoHTMLJupyter Notebook

Github contributions (5)

lynndylanhurley/devise_token_auth

Dec 2015 - Feb 2016

Token based authentication for Rails JSON APIs. Designed to work with jToker and ng-token-auth.

Role in this project:

Back-end Developer

Contributions:9 commits, 10 PRs, 21 comments in 2 months

Contributions summary:Daniel primarily focused on modifying and improving the `devise_token_auth` library, a Rails-based authentication system. Their contributions include refactoring code to align with Devise updates, specifically adapting parameter sanitization and controller interactions. They also updated the code to use Rails 5 conventions (changing `before_filter` to `before_action`), and implemented JSON API compliance in the response. Finally, they refined error handling within the controller.

authjson-apirailstoken-based-authenticationdevise

JuliaLang/www.julialang.org

Aug 2018 - Aug 2018

Julia Project website

Role in this project:

Front-end Developer

Contributions:8 commits, 4 PRs, 8 comments in 1 day

Contributions summary:Daniel primarily focused on improving the user interface and visual presentation of the Julia website. They made several changes to the website's layout and design, including fixing a breaking tag on the homepage, making the navbar and footer cleaner on mobile, and adding padding to enhance readability. The user also addressed image sizing and display issues, ensuring a consistent and visually appealing user experience across different devices.

juliafranklin

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