Adrian Serafin is a seasoned Ruby on Rails developer with 13 years of hands-on experience building and maintaining web applications and backend systems from startup projects to agency and product roles. Based in Warsaw, he has run his own consultancy since 2012 while contributing to teams at Whitespectre and Figment, blending entrepreneurial ownership with product-focused engineering. He brings deep PostgreSQL and ActiveRecord expertise, evidenced by contributions fixing primary key, sequence, and compatibility issues in the popular seed-fu library. Comfortable across the stack and with a background in C#, PHP and database work, he excels at solving tricky data migration and seeding problems that often hide in production. Known for pragmatic, durable solutions, he pairs a master's degree in Computer Programming with a steady track record of long-term client and employer engagements.
13 years of coding experience
15 years of employment as a software developer
Master's degree, Computer Programming, Master's degree, Computer Programming at Uniwersytet Gdański
Advanced seed data handling for Rails, combining the best practices of several methods together.
Role in this project:
Back-end Developer / Database Engineer
Contributions:4 releases, 33 commits, 7 PRs in 4 years 8 months
Contributions summary:Adrian primarily contributed to bug fixes and improvements related to PostgreSQL database interaction within the seed-fu library. They addressed issues with primary keys, sequences, and general compatibility for PostgreSQL users. Furthermore, the user implemented version bumps and fixed documentation issues. This involved directly modifying ActiveRecord extensions and the core seeder logic.
Contributions:18 releases, 47 commits, 36 PRs in 5 years 5 months
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