Isaac Bernat
Senior API Engineer at Photoroom
Barcelona, Catalonia, Spain
Summary
👤
Senior🎓
Top SchoolIsaac Bernat is a Senior Backend Engineer based in Barcelona with 11 years of experience building data-driven, revenue-impacting systems. He led design and scaling of Preply’s subscription platform, driving a 40% YoY lift in LTV and growing subscription GMV to 70% within a year, while owning long-running A/B experiments and cohort testing infrastructure. Comfortable across backend and fullstack roles, he has shipped high-traffic features—from GraphQL migrations and realtime dashboards to group-lesson orchestration and complex subscription policies. Earlier roles span data engineering, recommender systems, and CTO-level financial and ERP optimizations, reflecting both technical depth and business acumen. Isaac combines hands-on coding and repo stewardship with hiring and on-call leadership, and is skilled at turning product hypotheses into measurable growth. An engineer who balances rigorous academic training with pragmatic product outcomes, he often builds bespoke tooling to enable analytics and experimentation at scale.
11 years of coding experience
7 years of employment as a software developer
UPC Universitat Politècnica de Catalunya
Catalan, Spanish, English, Swedish
Stackoverflow
385reputation
13kreached
5answers
9questions
Github Skills (94)
python10
javascript10
youtube10
ttml10
sum10
js10
ipdb10
srt10
netflix10
youtube-dl10
webvtt10
subtitle10
vtt10
pudb10
regex10
Programming languages (11)
Github contributions (5)
isaacbernat/tinymem
Oct 2021 - Oct 2022
Thumby game inspired by Simon where players use their tiny memory
Contributions:46 commits, 7 PRs, 28 pushes in 11 months
memorypythongameplayerstiny
isaacbernat/basepaint
Jan 2025 - Feb 2026
Archive for the art generated by the basepaint.xyz community
Contributions:12 reviews, 10 PRs, 45 pushes in 1 year 1 month
nftnft-collectionnft-gallerynftspdf
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