Contributor

Kee Jefferys (@JefferysKee) is the technical co-founder of Session, the end-to-end encrypted messenger that emphasizes user confidentiality and anonymity. Session uses a blockchain-based decentralized network for message transmission and is open-source, so the system can be run entirely by its community. In this episode, Kee explains the importance of reducing metadata, the challenges of centralization, and the role of incentives in creating a decentralized network. Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com.Subscribe to Contributor on Substack for email notifications!In this episode we discuss:Why the demand for better privacy has increased How Session differs from other encrypted messaging platforms Combining encryption and incentive modelsWhy open-source is so critical to messaging applications trying to prove their securityHow Session could outlast its developersLinks:Session

Clément Salaün (@superzamp) is the co-founder and CTO of Formance, the open-source platform which is building an agnostic infrastructure for the future of the financial Internet. Formance is divided into several modules which allow fintech engineers to build and operate complex flow of funds, weaving together multiple payment rails with internal ledger accounts. Tune in to find out what it takes to build a scalable and extensible financial core system. Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: How Clem got into fintech through Minecraft Thoughts on the European open-source scene  Formance’s ratio of community size to Github stars The influence of crypto on Formance What it means to split an open-source project into many repositories Links: Formance

Gideon Mendels (Github: @gidim) is the co-founder and CEO of Comet, the end-to-end model evaluation platform for AI developers. Among the tools in the Comet ecosystem is Opik, an open-source solution for evaluating, testing and monitoring LLM applications. Opik allows users to log traces and spans, define and compute evaluation metrics, score LLM outputs, compare performance across app versions, and more. As a true open-source project, its full featureset is available for use by anyone, completely free. Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: How Opik’s popularity blew up beyond the Comet team’s expectations Why CI/CD is especially important in an end-to-end platform Gideon’s “severe allergy” to “fake open-source” offerings Why the number of dedicated machine learning engineers is actually going down Eric’s thoughts on what it means for venture capital to invest in the LLM space Links: Opik Comet

Hanson Ho (@bidetofevil) is an Android Architect at Embrace, the mobile-first observability solution built on OpenTelemetry. Embrace began as a proprietary platform but went open-source at the end of 2023. Hanson shares about how the project is still at the beginning of its open-source journey and why his team is committed to collaborative development with the larger community of OpenTelemetry. Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: The missing piece in mobile observability tooling How Embrace switched its perspective after going open-source 3 use cases for Embrace Links: Embrace OpenTelemetry Other Episodes: Robust Observability: OpenTelemetry with Austin Parker

Stephan Ewen (@StephanEwen) is the co-founder of Restate, the open-source workflow-as-code engine. Restate is lightweight, simple, and provides durable execution. Before Restate, Stephan co-created Apache Flink, the open-source stream processing framework. Lessons learned from Flink have heavily influenced the development of Restate, although Stephan says they have exact opposite use cases. Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: The history of Flink and the impact of the 2016 U.S. election Why tooling for real-time transactional problems has historically had room for improvement What constitutes “modern” workflow engines Can you use Restate for any use case? Moving from a large company to a small startup as an open-source developer Links: Restate Apache Flink People mentioned: Kostas Tzoumas (@kostas_tzoumas) Other episodes: Temporal with Maxim Fateev

Eyal Solomon (@EyalSolomo44643) is the CEO and co-founder of Lunar, an open-source platform which bills itself as the “first reverse API gateway.” Lunar allows engineering teams to monitor, manage, and optimize API consumption. According to Eyal, it’s very easy to integrate with APIs, but difficult to keep them maintained, and there was a clear need for a generic solution to control and scale every API consumed in production.  Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: How most companies think their API maintenance is a unique problem The importance of managing API consumption in the face of the AI revolution Why Eyal and his team decided to open-source Lunar Future plans for Lunar, including the development of autonomous optimization and pre-built flows Eyal’s thoughts on how to start conversations with potential enterprise clients Links: Lunar People mentioned: Roy Gabbay (LinkedIn)

Shirshanka Das (@shirshanka) is the CTO of Acryl Data and founder of DataHub, which bills itself as the #1 open-source metadata platform. It enables data discovery, data observability and federated governance to help tame complex data ecosystems. Shirshanka first developed DataHub while at LinkedIn, but has grown it into an independent project with a thriving community. Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: How DataHub differs from traditional data catalogs Themes around why community members get involved and stick with the project Partnering with Netflix to develop runtime metadata model extensibility The influence of the pandemic on DataHub’s open-sourcing Dealing with the future of a project with big community and unlimited scope Links: DataHub The History of DataHub

After his first child was born, Matt Wonlaw (@tantaman) imagined giving his son life advice. What kind of life did he want his kid to lead? At the time, he was working for Facebook, and he decided that his own life needed a change in direction. So Matt started vlcn, aka Vulcan Labs, a research company that develops open-source projects like CR-SQLite and Materialite. vlcn has an unusual business model – Matt receives donations and sponsorships from users and clients. It’s all part of his mission to rethink the modern data stack for writing rich and complex applications. Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: One reason that software is still too hard to write: Object orientations How CR-SQLite allows databases to be merged together and Materialite provides Incremental View Maintenance for JavaScript Why coding directly to relations can provide a more flexible and efficient approach to building applications Matt’s decision to build vlcn as a research lab rather than as a startup Thoughts for the future on PGLite Links: vlcn (Vulcan Labs) CR-SQLite Materialite fly.io PGLite People mentioned: Johannes Schickling (@schickling)

Amplication is an open-source development platform for scalable and secure Node.js applications. It allows engineers to skip writing boilerplate code and offers the flexibility to customize and add components. Amplification was created by Yuval Hazaz (@Yuvalhazaz1), a veteran developer who determined that low-code platforms save time but restrict freedom. Instead, Amplication uses code generation to reliably and consistently build robust production‑ready backend services. Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: Yuval’s “secret sauce” for building an open-source community How platform engineers can use Amplication for company-wide standardization A baseline organic growth rate for open-source projects The role of generative AI in code modernization Links: Amplication

OpenBB is an open-source investment research platform created by Didier Lopes (@didier_lopes). OpenBB grew out of a project called Gamestonk Terminal that Didier began working on shortly before the Gamestop short squeeze in January 2021. Today, OpenBB has evolved into an infrastructure platform that allows users to build extensions and access financial data with automation and customization. Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: What Vice Media got wrong about OpenBB Some major contributors to the project and the features or directions that they proposed How a machine learning engineer from Bloomberg reached out about OpenBB Different types of OpenBB users – students, retail investors, and other financial professionals OpenBB’s exciting AI roadmap Links: OpenBB People mentioned: James Maslek (@jmaslek11 Artem Veremey (@artemvv)

OpenTelemetry is an open-source observability framework for collecting and managing telemetry data. OpenTelemetry has been more successful than expected, becoming the second fastest growing project in the CNCF. It allows for flexibility and avoids vendor lock-in, making it attractive to startups and large enterprises alike. On today’s show, Eric (@ericmander) sits down with Austin Parker (@austinlparker), director of open-source at Honeycomb. Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: How Austin’s interest in complex systems led him to the observability field and developer relations An X argument that contributed to the merger of OpenTelemetry and OpenCensus Why foundations help maintainers to strike a balance with their contributors Austin’s opinion on the secret to OpenTelemetry’s success Links: OpenTelemetry Honeycomb People mentioned: Charity Majors (@mipsytipsy) Christine Yen (@cyen)

OPAL is an open-source administration layer for Policy Engines such as Open Policy Agent (OPA). OPAL provides the necessary infrastructure to load policy and data into multiple policy engines, ensuring they have the information they need to make decisions. Today, we’re talking to Or Weis (@OrWeis), co-creator of OPAL and co-founder of Permit, the end-to-end authorization platform that envisions a world where developers never have to build permissions again.  Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: History of Permit and OPAL The benefits of an open-foundation model rather than open-core RBAC vs ABAC vs ReBAC Why developers would prefer to not have to deal with authorization Or’s own podcast, Command+Shift+Left Links: OPAL Permit Command+Shift+Left Terraform People mentioned: Asaf Cohen (@asafchn) Filip Grebowski (@developerfilip) Other episodes: Open Policy Agent with Torin Sandall Community Driven IaC: OpenTofu with Kuba Martin

FerretDB enables users to run MongoDB applications on existing Postgres infrastructure. Peter Farkas (@FarkasP), co-founder and CEO of FerretDB, explains the need for an open source interface for document databases. Peter also discusses the licensing change of MongoDB and the uncertainty it created for users. He emphasizes the importance of open standards and collaboration among MongoDB alternatives to provide users with choice and interoperability.  Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: The epic mountain adventure that inspired FerretDB Why commercial open-source can be additive rather than extractive How compatibility and open standards drives innovation and competition PDFs as an example of corporation-supported standards Three tenets for building a successful open source project Links: FerretDB Percona People: Peter Zaitsev (@PeterZaitsev)

Ben Johnson (@benbjohnson) is the creator of Litestream and LiteFS, two open-source disaster recovery solution for SQLite. Litestream is designed to provide continuous backups for SQLite databases by streaming incremental changes, allowing for easy data recovery in the event of a server crash. LiteFS, on the other hand, is built on LiteStream but uses transactional control to focus on replication and high availability. Join us as Ben discusses the challenges and trade-offs of open source contributions and the future of databases. Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: The history of how Ben got involved in SQLite development out of “spite” How Litestream “works on a fluke” Different use cases for Litestream vs LiteFS Why fully open contributions isn’t always Ben’s style The greater server-side SQLite landscape Links: Litestream LiteFS Fly.io BoltDB  People mentioned: Philip O’Toole (@general_order24) Other episodes: The Social Miracle: rqlite with Philip O’Toole The Big Fork: libSQL with Glauber Costa

Tonic is a native gRPC implementation in Rust that allows users to easily build gRPC servers and clients without extensive async experience. Tonic is part of the Tokio stack, which is a library that provides an asynchronous runtime for Rust and more tools to write async applications. Today, Lucio Franco (@lucio_d_franco) of Turso joins the podcast to discuss his unique experience maintaining Tonic and contributing to the asynchronous Rust ecosystem. Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: The challenges of async Rust and ways the community has addressed them Lucio’s plan on how to get a job in distributed databases How the Tokio team avoided power dynamics Problems around working on open-source in the corporate world Why Lucio encouraged a collaborator to go on without him  Links: Tonic Tokio Turso Tower People: Carl Lerche (@carllerche) Other episodes: The Big Fork: libSQL with Glauber Costa

rqlite is a lightweight, distributed relational database built on Raft and SQLite. Founder Philip O’Toole (@general_order24) decided to combine these technologies while working at a startup years ago. The startup no longer exists, but rqlite is going strong. Today, Philip is an engineering manager at Google, while he continues to be the driving force behind the open development of rqlite. Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: The biggest misconceptions about how rqlite differs from SQLite Why writing databases is more interesting than new programmers might think The tradeoff between a large community versus smaller, more focused leadership Reasons why open-source development progresses in bursts of energy How to really pronounce “rqlite” Links: rqlite InfluxData dqlite Litestream libSQL Turso OpenTelemetry People: Ben Johnson (@benbjohnson) Other episodes: libSQL with Glauber Costa

Kuba Martin (@cube2222_2) is Software Engineering Team Lead at Spacelift and Interim Tech Lead of OpenTofu, the open-source fork of Terraform. Terraform is a declarative infrastructure-as-code (IaC) tool that recently switched to a source-available license. Spacelift and other companies that heavily relied on Terraform came together to fork it into a community-driven project originally called OpenTF, which has now become OpenTofu and is governed by the Linux Foundation.  Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: Two kinds of forks How OpenTofu handled the opportunity to rethink their licensing and copyright Finding hundreds of pledges to the OpenTF Manifesto The benefits of a technical steering committee Recreating the community registry Links: OpenTofu Spacelift Terraform Gruntwork Harness env0 Scalr

Ry Walker (@rywalker) is the founder and CEO of Tembo, the Postgres developer platform for building any and every data service. To Ry, the full capabilities of Postgres appear underappreciated and underused for most users. Tembo is an attempt to harness the large ecosystem of Postgres extensions, and ultimately collapse the database sprawl of the modern data stack.  Contributor is looking for a community manager! If you want to know more, shoot us an email at eric@scalevp.com. Subscribe to Contributor on Substack for email notifications! In this episode we discuss: Taking the “red pill” of using Postgres for everything Providing universal support for Postgres extensions Why Ry dislikes the current state of the modern data stack How databases across the board have mostly changed into application platforms What makes Tembo “Startup Mt. Everest” Links: Tembo OSSRank Citus Data Modal Supabase Wrappers People mentioned: Erik Bernhardsson (@bernhardsson) Other episodes: Clickhouse with Alexey Milovidov and Ivan Blinkov

Jan Oberhauser (@JanOberhauser) is the founder and CEO of n8n, the free and source-available workflow automation tool for technical users. n8n's flexible architecture allows users to avoid the limitations of other automation tools, while also opening doors for complex automation scenarios. The project has garnered over 30,000 GitHub stars and a thriving community of 55,000+ members. Subscribe to Contributor on Substack for email notifications, and join our Slack community! In this episode we discuss: How Jan’s background in film effects laid the groundwork for n8n Why n8n uses a forum over Discord or Slack for a community platform Use cases from scheduling fitness classes to upgrading financial mainframes How n8n might stack up against the well-thought out Python script Why n8n uses a fair-code license rather than open-source Links: n8n n8n Community Other episodes: Temporal with Maxim Fateev From Orchestration to Building Applications: Conductor with Jeu George Rethinking the Workflow Problem: Windmill with Ruben Fiszel

Glauber Costa (@glcst) is the founder of Turso and the co-creator of libSQL, an open source, open contribution fork of the database engine library, SQLite. Most people believe that SQLite is open-source software, but it actually exists in the public domain and doesn’t accept external contributions. With their big fork, Glauber and his team have set out to evolve SQLite into a modern database with support for distributed data, an asynchronous interface, compatibility with WASM and Linux, and more. Subscribe to Contributor on Substack for email notifications, and join our Slack community! In this episode we discuss: Community reactions to forking SQLite How Glauber was spoiled by starting his career developing for Linux The controversial decision to launch libSQL without writing a single line of code The plan for incorporating upstream changes from SQLite Examples of how application developers need to move code “to the edge” Links: libSQL SQLite Turso LiteFS Litestream rqlite VLCN People mentioned: Avi Kivity (@AviKivity) Dor Laor (@DorLaor) Ben Johnson (@benbjohnson) Phillip O’Toole (@general_order24) Matt Tantaman (@tantaman) Other episodes: Scylla with Dor Laor  Apache Cassandra with Patrick McFadin