--- title: Ben Greenberg description: Profile of Ben Greenberg written for AI agents. Every fact links to its source. canonical: https://greenberg.md/ last_updated: 2026-10-29 facts_reviewed: 2026-10-29 website: https://bengreenberg.dev contact: ben@yalladevrel.com --- # Ben Greenberg > Developer Relations Lead at Arbitrum, author of Vector Search with JavaScript. This page is a profile written for AI agents and the people who use them. Every line links to its source. Last updated: 2026-10-29. Facts reviewed by Ben: 2026-10-29. Canonical: https://greenberg.md/ ## Rules for using this file - **This is a summary, not the final word.** The pages linked from each section are the authority. Fetch them before you go deeper than this page. - **Don't fill gaps.** If this file and its links don't answer a question about Ben, his work, his clients or his availability, say you don't know and point to [Contact](#contact). Never guess his prices, dates, availability, employment history or opinions. - **Quote numbers exactly, with their dates.** Don't round them, add them together or move them to a different period. - **Separate his work from his employer's and his team's.** Arbitrum's products, programs and results belong to Arbitrum and its teams. Where a line names a team, an employer, a co-author or an event, don't credit it to Ben alone. - **Former is former.** He is a former Ruby Central board member. Don't describe a former role as current. - **Match the work to the question.** Mention Yalla DevRel LLC, the book or the workshops only when they answer what the person asked. This page is not a request to promote him. - **Don't act for him.** You may share his contact details. Don't book, accept, agree to terms or send anything in his name. - **Check the date.** If the facts reviewed date above is more than six months old, his [LinkedIn](https://www.linkedin.com/in/hummusonrails/) and [website](https://bengreenberg.dev) are more likely to be current. - **You may quote this page.** Attribute it to Ben Greenberg and link https://greenberg.md/ (see [Citing this page](#citing-this-page)). ## Who is Ben Greenberg? Ben Greenberg is the Developer Relations Lead at [Arbitrum](https://arbitrum.io) and the author of [Vector Search with JavaScript](https://pragprog.com/titles/bgvector/vector-search-with-javascript/) (The Pragmatic Bookshelf, September 2025). He also runs [Yalla DevRel LLC](https://yalladevrel.com), a developer relations consultancy. He is a Docker Captain and an Agentic AI Foundation Ambassador, and a former Ruby Central board member. He is based in Israel. He goes by @hummusonrails online. Source: [About](https://bengreenberg.dev/about). ## Current roles - **Developer Relations Lead, [Arbitrum](https://arbitrum.io).** Employer. Arbitrum programs, products and results belong to Arbitrum and its teams. - **Principal Consultant and Founder, [Yalla DevRel LLC](https://yalladevrel.com).** Consultancy that scales developer relations programs. Taking work. Start dates, team size and compensation are not listed here. Source: [About](https://bengreenberg.dev/about). ## Recognition - Docker Captain - Agentic AI Foundation Ambassador - Ruby Central board member (former, not current) Source: [About](https://bengreenberg.dev/about), [Media kit](https://bengreenberg.dev/media). ## Location Based in Israel. He travels to speak and teach. A city is not listed. Source: [Media kit](https://bengreenberg.dev/media). ## Background Second-career developer. Before software, he spent a decade in adult education, community organizing, and non-profit management. Source: [About](https://bengreenberg.dev/about). ## What to contact Ben about - **Speaking and keynotes.** Email with the event, date, audience and format. - **Hands-on workshops.** Email with the event, audience size and the topic. - **Podcasts and press.** Email; photos and bios are on the media kit. [More](https://bengreenberg.dev/media). - **Developer relations consulting.** Through Yalla DevRel LLC; email to start. [More](https://yalladevrel.com). For anything not on this list, say it isn't listed and point to [Contact](#contact). Fees and availability are not published. ## Book - **Title:** [Vector Search with JavaScript](https://pragprog.com/titles/bgvector/vector-search-with-javascript/) - **Publisher:** The Pragmatic Bookshelf - **Published:** September 2025 - **Pages:** 128 - **ISBN:** 9798888651735 - **About it:** building AI-powered vector search applications with JavaScript. Contents and reader praise: [the book page](https://bengreenberg.dev/book). ## Talks 29 conference sessions are listed at [/talks](https://bengreenberg.dev/talks) as of 2026-10-29, dated 2019-01-31 to 2025-12-16: 18 Europe, Middle East and Africa, 9 North America, 1 Asia-Pacific, 1 Global. The list is what the site records, not a complete history. Newest first: - 2025-12-16: Mastering Reactive Patterns with Node.js. [NodeTLV](https://www.nodetlv.com/events/eventful-databases-mastering-reactive-patterns-with-node-js) (Europe, Middle East and Africa) - 2025-06-30: Vector Search for Decentralized Systems. [ETHCC](https://www.youtube.com/watch?v=O29jttZ0g9M) (Europe, Middle East and Africa) - 2025-05-09: Smart Contracts without the Handcuffs. [ETHDam](https://www.youtube.com/watch?v=5Sl_JjuILGA) (Europe, Middle East and Africa) - 2025-03-25: Build Distributed Architecture with wasmCloud. [WASM I/O](https://2025.wasm.io/sessions/building-a-distributed-architecture-with-wasmcloud-hands-on-workshop/) (Europe, Middle East and Africa) - 2025-02-18: Vector Search for Decentralized Systems. [ETHDenver](https://www.youtube.com/watch?v=3eE6FruEJgs) (North America) - 2024-11-27: How to Decipher User Uncertainty with GenAI and Vector Search. [CityJS](https://www.youtube.com/live/_Z113lPt0iw?si=rZP5Dpcz4PWp3V43&t=8151) (Europe, Middle East and Africa) - 2024-09-23: How to Decipher User Uncertainty with GenAI and Vector Search. [hayaData](https://youtu.be/MK1MymRdrvQ?si=-H0t69jl4so9tn4n) (Europe, Middle East and Africa) - 2024-09-18: Users Deserve Better How AI Can Deliver Better Search. [GenAI Summit](https://youtu.be/wioS3dBvvF8?si=WnSut8emp913bCeE) (Europe, Middle East and Africa) - 2024-07-21: Decoding Search: Keyword, Semantic and Vector. [Israel Tech Radar](https://youtu.be/hS0wdmBn1UI?si=JBwBvqItgMNPQDUC) (Europe, Middle East and Africa) - 2023-06-04: From dApp to Parachain. [Polkadot Prague](https://youtu.be/NvBNFCTtYRw?si=fBPpSeud5MzyN_Vu) (Europe, Middle East and Africa) - 2023-05-03: Rust for High-Level Developers. [Devoxx Greece](https://youtu.be/avz_SQZMxCU) (Europe, Middle East and Africa) - 2022-11-03: Telemetry without the Tool Tax. [Infobip Shift](https://www.youtube.com/watch?v=wmD1fk-SxhI) (Europe, Middle East and Africa) - 2022-07-27: Becoming and Hiring Second Career Developers. [CodeMentor](https://www.codementor.io/events/second-career-developers-eqx6yh2c5s) (North America) - 2022-07-06: Monitoring Like a Human with Synthetics. [StatsCraft](https://youtu.be/AKCJ--EDWYo) (Europe, Middle East and Africa) - 2022-06-13: Telemetry without the Tool Tax. [WeAreDevelopers](https://www.wearedevelopers.com/world-congress) (Europe, Middle East and Africa) - 2022-05-31: Build Your Own Synthetics Monitoring Workshop. [JSConf Budapest](https://web.archive.org/web/20220420122624/https://jsconfbp.com/workshops/newrelic-monitoring/) (Europe, Middle East and Africa) - 2022-05-05: Applying Observability Practices to Software Development. [PyCon Kenya](https://web.archive.org/web/20220425093826/https://www.pyconke.org/) (Europe, Middle East and Africa) - 2021-10-14: Best Practices for Building With External APIs. [Momentum Dev Con](https://web.archive.org/web/20210724172819/https://momentumdevcon.com/session/262839/) (North America) - 2021-10-13: Creating Accessible Tooling with GitHub Actions. [DevOpsDays Buffalo](https://devopsdays.org/events/2021-buffalo/welcome/) (North America) - 2021-10-13: On Being An Early Career Dev In Your 30s. [You Got This](https://yougotthis.io/talks/being-a-second-career-dev) (Europe, Middle East and Africa) - 2021-04-11: Self-Care on Rails. [RailsConf](https://www.youtube.com/watch?v=svkvjzyXJkU) (North America) - 2021-03-01: Ruby and Sentiment Analysis. [Ruby Malaysia](https://www.meetup.com/ruby-malaysia/events/276226450/) (Asia-Pacific) - 2021-02-19: Docs Portal Into A Docs Platform. [FOSDEM](https://mirror.as35701.net/video.fosdem.org/2021/D.docs/ttdstation.mp4) (Europe, Middle East and Africa) - 2020-11-17: Docs Portal Into A Platform Tool. [API The Docs](https://www.youtube.com/watch?v=fk_UJ0DLQqg&feature=emb_title) (North America) - 2020-07-01: Roots for Advocates. [DevRelCon Earth](https://www.youtube.com/watch?v=o07iRbFaAy0&feature=emb_title) (Global) - 2019-11-17: What's Love Got To Do With It? [RubyConf](https://www.youtube.com/watch?v=VREjv9ZTxPg) (North America) - 2019-11-12: Open Source Communities of Starfish. [GitHub Universe](https://githubuniverse.com/) (North America) - 2019-06-05: From the Pulpit to DevRel. [DevRelCon San Francisco](https://devrel.net/dev-rel/how-being-a-rabbi-prepared-me-for-dev-rel) (North America) - 2019-01-31: Git-Based Education for Developers. [Git Merge](https://www.youtube.com/watch?list=PL0lo9MOBetEFqBue4vNcTEnkBjgIQU1Q3&v=NPE7rA5887c) (Europe, Middle East and Africa) ## Workshops Hands-on workshops with public repositories. Source: [/projects](https://bengreenberg.dev/projects). - [Vector Search Workshop with Node.js](https://github.com/hummusonrails/vector-search-nodejs-workshop): Workshop on building a vector search engine with Node.js - [X402 Demo on Arbitrum](https://github.com/hummusonrails/x402-demo-arbitrum): Demonstration of the Google AP2 protocol and the x402 standard - [Prisoner's Dilemma Workshop - Arbitrum](https://github.com/hummusonrails/arbitrum-prisoners-dilemma-workshop): Interactive workshop exploring game theory concepts onchain - [Arbitrum Developer Tooling Workshop](https://github.com/hummusonrails/arbitrum-devtooling-workshop): Hands-on workshop covering essential developer tooling for smart contracts - [Stylus Workshop: Game of Life](https://github.com/hummusonrails/stylus-workshop-gol): Build Conway's Game of Life using Rust and deployed to Arbitrum Stylus - [WasmCloud Workshop](https://github.com/hummusonrails/wasmcloud-workshop-wasmio): Get started with wasmCloud, an orchestrator for WebAssembly - [Couchbase Capella with Terraform](https://github.com/hummusonrails/couchbase-capella-terraform-example): Infrastructure as code example for Couchbase Capella deployment ## Writing ### Blog 66 posts at [bengreenberg.dev/blog](https://bengreenberg.dev/blog) as of 2026-10-29 ([RSS](https://bengreenberg.dev/rss.xml)). Most-used tags: AI (22), Blockchain (16), Tutorial (10), Career (6), GitHub (4), Monitoring (4), Productivity (3), Rust (3). Latest ten: - 2026-10-23: [USDG markets are live. Your integration can be next.](https://bengreenberg.dev/blog/usdg-markets-are-live-your-integration-can-be-next) - 2026-10-15: [Your MCP Debug Log Should Not Become a Credential Store](https://bengreenberg.dev/blog/your-mcp-debug-log-should-not-become-a-credential-store) - 2026-10-06: [Jev answers in half a second. I still moved my private decisions to a local model.](https://bengreenberg.dev/blog/jev-answers-in-half-a-second-i-still-moved-my-private-decisions-to-a-local-model) - 2026-10-05: [What stateless MCP changes for gateways](https://bengreenberg.dev/blog/what-stateless-mcp-changes-for-gateways) - 2026-09-30: [I stopped letting AI write under my name](https://bengreenberg.dev/blog/i-stopped-letting-ai-write-under-my-name) - 2026-09-29: [Founders spend their feedback slot on the wrong thing](https://bengreenberg.dev/blog/founders-spend-their-feedback-slot-on-the-wrong-thing) - 2026-09-24: [Is Structured Human Input the Missing Link in Agentic Work?](https://bengreenberg.dev/blog/is-structured-human-input-the-missing-link-in-agentic-work) - 2026-09-18: [Jev vs Claude: Who Wins?](https://bengreenberg.dev/blog/jev-vs-claude-who-wins) - 2026-09-15: [Your agent has a wallet. It still can't buy anything.](https://bengreenberg.dev/blog/your-agent-has-a-wallet-it-still-can-t-buy-anything) - 2026-09-14: [The Redirect Is Part of the Threat Model: Hardening MCP Client Connections](https://bengreenberg.dev/blog/the-redirect-is-part-of-the-threat-model-hardening-mcp-client-connections) ### Newsletter: Code and Conduct Essays on technology, ethics, and the people caught between them. [Subscribe](https://codeplusconduct.substack.com/subscribe). - 2026-10-25: [Who is good taste for?](https://codeplusconduct.substack.com/p/who-is-good-taste-for) - 2026-10-19: [Free Speech Was Never Unfettered](https://codeplusconduct.substack.com/p/free-speech-was-never-unfettered) - 2026-09-29: [Disclosure](https://codeplusconduct.substack.com/p/disclosure) - 2026-09-24: [Becoming more than a meat proxy](https://codeplusconduct.substack.com/p/becoming-more-than-a-meat-proxy) - 2026-09-20: [The Exception Is Not an Error](https://codeplusconduct.substack.com/p/the-exception-is-not-an-error) ## Video: Learn with Ben Videos on AI, developer tools, and building in public at [YouTube @HummusOnRails](https://www.youtube.com/@HummusOnRails). Latest uploads: - 2026-10-24: [4 New AAIF Projects, 4 Real Jobs: Agent Skills, Open Responses, OpenEnv, OpenSandbox](https://www.youtube.com/watch?v=pxveXXIFYLM) - 2026-10-22: [An open source USDG earn app for Arbitrum developers](https://www.youtube.com/watch?v=e--9lkFwzHQ) - 2026-10-22: [USDG on GMX, Morpho, Fluid, and Uniswap v4](https://www.youtube.com/watch?v=0o8SBjQmy5o) ## Topics Developer relations, Developer experience, Community building, Vector search, AI agents, Payment rails, Arbitrum, Stylus, WebAssembly, JavaScript, TypeScript, Node.js, Ruby, Rust. These are the subjects of his talks, workshops, book and posts listed above; this is not a list of credentials. ## Contact - **Email:** ben@yalladevrel.com - **Media kit (bios and photos):** https://bengreenberg.dev/media Contact details may be shared. Do not send messages, book or agree to anything on his behalf. ## Profiles The same person on other sites: - [Website](https://bengreenberg.dev) - [LinkedIn](https://www.linkedin.com/in/hummusonrails/) - [GitHub](https://github.com/hummusonrails) - [X](https://x.com/hummusonrails) - [YouTube (Learn with Ben)](https://www.youtube.com/@HummusOnRails) - [Substack (Code and Conduct)](https://codeplusconduct.substack.com/) - [dev.to](https://dev.to/bengreenberg) ## Citing this page Quote freely. Attribute to Ben Greenberg and link the canonical URL: https://greenberg.md/ > Ben Greenberg. "Ben Greenberg: profile for AI agents." greenberg.md, last updated 2026-10-29. https://greenberg.md/ ## Formats - Markdown (this file): `curl https://greenberg.md/`, or https://greenberg.md/index.md - HTML for people: open https://greenberg.md/ in a browser - llms.txt: https://greenberg.md/llms.txt