

Coffee and Open Source
Isaac Levin
Join host Isaac Levin as he has great conversations with folks in the technology and Open Source Community
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Apr 15, 2025 • 1h 4min
Dave Grundgeiger
Based in Los Angeles, Dave has dedicated his career to solving complex technical challenges across various domains. His professional journey includes roles as Principal Software Architect at PKWARE, Senior Backend Engineer at Fetch Rewards, and Staff Software Engineer at Bold Penguin, where he consistently designed high-performance, scalable systems.Dave's current passion project, Contextium, represents the culmination of his technical expertise and intellectual interests. This system transforms natural language into deep semantic graphs -- and vice versa -- through innovative knowledge representation techniques. Contextium employs a symbolic, rules-based approach to NLP rather than relying solely on statistical methods, allowing for precise semantic understanding and addressing critical limitations in current AI systems, for example hallucinations in large language models.A published author with O'Reilly Media, Dave wrote 'Programming Visual Basic .NET' (2001) and 'CDO & MAPI Programming with Visual Basic' (2000), demonstrating his ability to communicate complex technical concepts clearly.Over his long career, Dave has worked in many languages and tech stacks. His interests extend beyond pure engineering to theoretical aspects of AI, consciousness, and the intersection of symbolic and neural approaches to machine intelligence.You can find Dave on the following sites:LinkedInPLEASE SUBSCRIBE TO THE PODCASTSpotifyApple PodcastsYouTube MusicAmazon MusicRSS FeedYou can check out more episodes of Coffee and Open Source on https://www.coffeeandopensource.comCoffee and Open Source is hosted by Isaac Levin

Mar 31, 2025 • 1h 2min
Dennis Doomen
Dennis is a Microsoft MVP and Principal Consultant at Dutch Microsoft consultancy firm Aviva Solutions. With 27 years of experience under his belt as a software architect and/or lead developer, he specializes in designing full-stack enterprise solutions based on .NET as well as providing coaching on all aspects of designing, building, documenting, deploying and maintaining software systems in an agile world. He is the author of Fluent Assertions, an assertion library to make your unit tests look great, Liquid Projections, a set of libraries for building Event Sourcing projections and he has been maintaining coding guidelines for C# since 2001. You can find him on Twitter, Mastodon and BlueSky.You can find Dennis on the following sites:XBlueskyLinkedInGitHubBlogPLEASE SUBSCRIBE TO THE PODCASTSpotifyApple PodcastsYouTube MusicAmazon MusicRSS FeedYou can check out more episodes of Coffee and Open Source on https://www.coffeeandopensource.comCoffee and Open Source is hosted by Isaac Levin

Mar 18, 2025 • 1h 2min
Maxim Fateev
Maxim has spent the last 25 years building massive distributed systems for Amazon, Microsoft, Google, and Uber. Among other things, he led the design and development of the AWS SQS backend, and AWS Simple Workflow Service. At Uber, Maxim led the effort on open source projects Cherami and Cadence Workflow.Since October of 2019, Maxim has been the CEO/Cofounder of Temporal Technologies. Its flagship open source project temporal.io is redefining the way large-scale reliable applications are developed and operated.You can find Maxim on the following sites:LinkedInXGitHubHere are some links provided by Maxim:TemporalPLEASE SUBSCRIBE TO THE PODCASTSpotifyApple PodcastsYouTube MusicAmazon MusicRSS FeedYou can check out more episodes of Coffee and Open Source on https://www.coffeeandopensource.comCoffee and Open Source is hosted by Isaac Levin

Feb 27, 2025 • 1h 8min
Kee Jefferys
Kee Jefferys is the co-founder of Session, an encrypted messaging application that minimizes the collection of user metadata. Kee has been involved in numerous technological projects, specializing in decentralized networking and blockchain.As an active and engaged member of the privacy-preserving technology community, Kee regularly attends conferences and meetups centered around privacy protection, the fight for encryption, and ethical dataYou can find Kee on the following sites: LinkedIn X GitHubHere are some links provided by Kee: Session PLEASE SUBSCRIBE TO THE PODCAST Spotify Apple Podcasts YouTube Music Amazon Music RSS FeedYou can check out more episodes of Coffee and Open Source on https://www.coffeeandopensource.comCoffee and Open Source is hosted by Isaac Levin

Feb 11, 2025 • 1h 1min
Giorgi Dalakishvili
Giorgi is a software developer with almost two decades of experience. He works mainly with C#, ASP.NET Core, Entity Framework Core and .NET MAUI.Giorgi is an open-source author and contributor on GitHub, a Microsoft MVP, and a member of the .NET Foundation.You can find Giorgi on the following sites:XLinkedInGitHubWebsiteHere are some links provided by Giorgi:EFCore.VisualizerEFCore.Visualizer RepoEntityFramework.Exceptions RepoPLEASE SUBSCRIBE TO THE PODCASTSpotifyApple PodcastsYouTube MusicAmazon MusicRSS FeedYou can check out more episodes of Coffee and Open Source onhttps://www.coffeeandopensource.comCoffee and Open Source is hosted byIsaac Levin

Jan 14, 2025 • 1h 9min
Tanmai Gopal
Tanmai is the CEO of Hasura.io, a company he co-founded to develop software to simplify and accelerate application development. Before Hasura, he co-founded 34 Cross, a software development and consulting company focused on web and mobile development and helping Fortune 500 companies transition from monolithic to microservices architectures. While at 34 Cross, he also incubated two companies developing browser extensions, food delivery and food-finding apps for cities in India. Tanmai holds bachelor’s and master’s degrees in computer science from the Indian Institute of Technology, Madras.
You can find Tanmai on the following sites:
X
Here are some links provided by Tanmai:
Hasura
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You can check out more episodes of Coffee and Open Source on https://www.coffeeandopensource.com
Coffee and Open Source is hosted by Isaac Levin

Jan 7, 2025 • 1h 4min
Michelle Sandford
This is Michelle in her own words.
I am the Developer Engagement Lead for Microsoft in Asia as well as a Tedx Speaker, developer community mentor, Microsoftie and international conference Speaker. I live at the heart of the coding community and help drive awareness and engagement as a developer advocate and technology evangelist. I advocate for STEM, the Games Industry and Developers
You can find Michelle on the following sites:
Bluesky
LinkedIn
GitHub
YouTube
Here are some links provided by Michelle:
Tech Outsiders
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You can check out more episodes of Coffee and Open Source on https://www.coffeeandopensource.com
Coffee and Open Source is hosted by Isaac Levin

Dec 17, 2024 • 1h 7min
Jeramiah Dooley
Jeramiah Dooley (he/him) leads the advocacy team focused on Enterprise customers, making sure that the product and content are aligned for organizations who are using GitHub every day. For more than 19 years he has spent his career at the intersection of 'enterprise' and 'what's next' and is excited to focus on bringing the best experience possible to developers and platform teams.
Prior to GitHub, Jeramiah led the advocacy efforts around serverless container services at AWS, and was a Principal Cloud Advocate in Azure Engineering, leading the team that supported Enterprise Platforms and Tools. Jeramiah was also the Manager of NetApp’s Global Technical Pursuit team, focusing on helping customers and partners architect next generation solutions using their entire portfolio, focusing on VMware, OpenStack, and container integrations.
Jeramiah also has worked in the healthcare, legal and service provider industries.
You can find Jeramiah on the following sites:
Bluesky
LinkedIn
GitHub
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You can check out more episodes of Coffee and Open Source on https://www.coffeeandopensource.com
Coffee and Open Source is hosted by Isaac Levin

Nov 26, 2024 • 1h 3min
Magnus Mårtensson
Magnus Mårtensson is an entrepreneur, a Microsoft Most Valuable Professional (MVP) for Azure since the start of the cloud, and a Microsoft Regional Director (RD). He is a consultant, architect, product development lead, and he runs his own company Loftysoft. As an international speaker Magnus travels the world to teach, network, learn, and experience. His passions include connecting with audiences and organizing conferences such as CloudBurst and GlobalAzure. He is of course also very into good food, wine, and great company. Topping it all is mind-sharing, so when you see him at a conference, come over and say hi!
You can find Magnus on the following sites:
X
LinkedIn
GitHub
Website
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You can check out more episodes of Coffee and Open Source on https://www.coffeeandopensource.com
Coffee and Open Source is hosted by Isaac Levin

Nov 19, 2024 • 1h 6min
Mathias Buus Madsen
As CEO of Holepunch, Mathias brings his passion and extensive expertise in open-source development to the fore, having published more than 1000 modules to npm, the Node.js package manager, totalling billions of downloads every month.
Mathias Buus is a self taught JavaScript hacker from Copenhagen. He works full time on open source projects and has been working with Node.js since the 0.2 days. Mathias likes to work with P2P and distributed systems and is the author of more than 550 modules on npm, including some of the most popular ones for working with streams. In addition he has spoken about “mad science” projects at various conferences around the world.
You can find Mathias on the following sites:
X
LinkedIn
GitHub
Website
Here are some links provided by Mathias:
Pear Runtime
Keet
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You can check out more episodes of Coffee and Open Source on https://www.coffeeandopensource.com
Coffee and Open Source is hosted by Isaac Levin