Erik Bernhardsson
Overview
Erik Bernhardsson works on data, machine learning and infrastructure. He helped build SpotifySpotifySpotify is an audio streaming subscription service offering on-demand music, podcasts, and audiobooks through a free ad-supported service and a paid Premium subscription. Its parent company, Spotify Technology S.A., is incorporated in Luxembourg, has its principal operations in Stockholm, Sweden, and is listed on the New York Stock Exchange (ticker SPOT). It helped move the recorded-music business from buying and owning music to on-demand streaming and is one of the largest audio streaming subscription services by users.Open the full entry’s music recommendation system before founding ModalModalModal is a cloud infrastructure company founded by Erik Bernhardsson and Akshat Bubna. Operated by New York-based Modal Labs, Inc., its platform lets developers configure cloud CPUs, GPUs and containers in code for model inference, training, batch processing and isolated execution of AI agent workloads.Open the full entry.[1]
Contents14 sections
Key facts
2002–2003Informatics Competitions
Representing Sweden at the International Olympiad in Informatics, he won bronze in 2002 and gold in 2003, placing eighth among 265 contestants.[2]
Education and Internships
He earned an MSc in engineering physics at KTH and studied on exchange at TU Berlin. From September 2006 to April 2007, he interned at Google in Zurich.[3]
2009Joining Spotify
After working on his recommender-system thesis at Spotify, he joined full-time in early 2009, initially focusing on data engineering and product analytics.[4]
2011Trading Systems
From March to September 2011, he developed high-frequency trading systems at Graham Capital, returning to Spotify’s New York team in October.[3]
2012Spotify Projects
In early 2012, the recommendation project gained more resources and launched features.[4]
Primarily developed at Spotify by Bernhardsson and Elias Freider, Luigi was open-sourced in late 2012. The Python tool organizes dependencies between batch tasks and provides workflow management, visualization and failure handling across data-processing jobs.[5]
Open Source: Annoy and Benchmarks
His Annoy library uses C++ and Python for high-dimensional vector indexing and approximate nearest-neighbor retrieval, with applications in Spotify recommendations. His other projects include ANN-Benchmarks for comparing nearest-neighbor algorithms and Git of Theseus for analyzing repository evolution.[6]
2015–2021Better
From February 2015 to January 2021, he led Better’s technology team, which numbered about 300 by his departure.[1]
As CTO, his work included recruiting, technical development and some programming.[4]
2021Modal Prototype
Cofounder Akshat BubnaAkshat BubnaAkshat Bubna is the co-founder and CTO of Modal. He previously worked at Scale AI and won India’s first International Olympiad in Informatics gold medal in 2014.Open the full entry recalled joining Bernhardsson in 2021, when Modal was still a prototype called Polyester. The early team hired around immediate needs before substantially expanding in 2024.[7]
December 2022Introducing Modal
On December 7, he introduced Modal while access still used a waitlist. The platform invoked cloud compute through Python, using a custom container runner, image builder and filesystem to shorten feedback between local development and remote execution.[8]
October 2023Annoy’s Successor
On October 25, Spotify reviewed Annoy’s use since its 2013 open-source release and introduced Voyager as its recommended successor for production workloads.[9]
October 2026Modal Funding
On October 14, he announced Modal’s $750 million Series D led by Accel at a $15.75 billion post-money valuation. The company reported over $1 billion in annualized run rate, a measure of current business scale rather than realized full-year revenue.[10]
Related Organizations, Websites, and Public Accounts
Modal: Official website: https://modal.com/ (opens in a new window)[8]
Personal website: Official website: https://erikbern.com/ (opens in a new window)[1]
X: Public account: https://x.com/bernhardsson (opens in a new window)[11]
LinkedInLinkedInLinkedIn is a social networking platform for professionals. It was founded in 2002 by Reid Hoffman and others, launched in 2003, and listed on the New York Stock Exchange in 2011; after Microsoft acquired it for approximately $26.2 billion in 2016, it became a wholly owned Microsoft subsidiary. Its revenue comes from membership subscriptions, advertising, and recruitment solutions.Open the full entry: Public profile: https://www.linkedin.com/in/erikbern (opens in a new window)[12]
Sources
- About (opens in a new window)
- Erik Bernhardsson (opens in a new window)
- Erik Bernhardsson (opens in a new window)
- Erik Bernhardsson - Former CTO @ Better.com (opens in a new window)
- Getting Started — Luigi 3.8.1 documentation (opens in a new window)
- Open source (opens in a new window)
- Akshat Bubna’s Post (opens in a new window)
- What I have been working on: Modal (opens in a new window)
- Introducing Voyager: Spotify’s New Nearest-Neighbor Search Library (opens in a new window)
- Modal crosses $1B in Annualized Run Rate and raises $750M Series D (opens in a new window)
- Can AI Infrastructure Work Like Magic? | Erik Bernhardsson, CEO, Modal (opens in a new window)
- Erik Bernhardsson - Modal Labs (opens in a new window)