Michael Cohen

Work Experience

Prefer a one-pager? Download the résumé (PDF, updated Sep 2026)

1. Aug 2024 – Present

   

   Anthropic (opens in new tab)

   • Agentic Systems Team

     Member of Technical StaffAug 2024 – Present

     • Tech lead for the Agentic Systems team and lead engineer on Claude Managed Agents (opens in new tab), built from scratch to public beta in April 2026: Anthropic's hosted runtime for long-running agents, with sessions, sandboxes, vaults, memory, outcomes and multiagent orchestration, in production at Notion, Rakuten, Asana, Sentry and Atlassian.

     • Had a hand in every capability the platform has shipped, from the core session, harness and sandbox primitives to the outcomes, multiagent orchestration, dreaming and webhooks (opens in new tab) launched at Code with Claude 2026.

     • Co-authored Scaling Managed Agents: Decoupling the brain from the hands (opens in new tab), the engineering post whose brain / hands / session split is now widely cited as the reference architecture for agent runtimes (InfoQ (opens in new tab), DEV (opens in new tab)).

     • Moved the harness out of the execution container: ~60% lower median and >90% lower p95 time to first token, with credentials never entering the sandbox.

2. Jun 2021 – Dec 2023

   

   OpenSea (opens in new tab)

   • Creator Team

     Engineering ManagerAug 2022 – Dec 2023

     • Bootstrapped and directly managed 6 engineers (FS + BE) focused on building products and tools for creators.

     • Led a team of 4 engineers in the development of Primary Drops (opens in new tab), a 0 → 1 NFT creation platform with over $25M+ GMV (opens in new tab) and $2M+ revenue to date, grew from 0% to ~15% market share (opens in new tab).

     • Shipped OpenSea Studio (opens in new tab), a one-stop shop, no-code solution for creators to build & manage their NFT projects from scratch, with over 12 million NFTs created across 25K collections to date on the platform.

     • Shipped new collection pages (opens in new tab), rich storytelling for creators through a feature rich page editor.

     • Collaborated with high-profile marquee partners (Nike, Puma, Adidas, Haas, Hugo Boss (opens in new tab)) to launch their NFT projects.

     • Served as team’s TL and set the technical direction, authored/reviewed engineering RFCs, and set up operational processes and standards.

     • Worked cross functionally with BD, marketing, ops, legal, and finance on partnerships, deal negotiations, and product launches.

   • Platform Team

     Senior Software EngineerJun 2021 – Aug 2022

     • Drove critical enhancements in OpenSea's platform during a period of hyperscale, significantly contributing to its GMV growth, which currently sits at $35 billion (opens in new tab).

     • Led the scaling, migration, and documentation rewrite (opens in new tab) of the public REST API, introduced a new Elixir-based stream API (opens in new tab), and integrated advanced queuing systems for robust scalability.

     • Implemented spam detection for blockchain NFT mints and facilitated the integration of the Solana blockchain (opens in new tab) into the marketplace, broadening platform capabilities while increasing the stability of our infrastructure.

3. May 2017 – Jun 2021

   

   Amazon (opens in new tab)

   • Amazon Live: FireTV

     Software EngineerJun 2020 – Jun 2021

     • Lead the Amazon Live FireTV team as its frontend lead. Oversaw the complete redesign of the existing Amazon Shopping app on FireTV to transform it to a livestream-centric experience.

     • Upgraded the existing Android / FireTV app to use modern Android architecture and features. This vastly improved the performance of the app with decreased load time and a smoother UX.

     • Introduced key livestream viewing features to FireTV users that include a chat sidebar and an improved product carousel.

   • Amazon Live: Creator

     Software EngineerSep 2018 – Jun 2020

     • Served as a Fullstack Engineer for Amazon Live, Amazon's shoppable livestreaming platform. Developed features for the iOS Creator app, across the data layer, APIs, and the front-end. This tool enables our creators to livestream to the Amazon Live platform.

     • Designed and executed Influencer login for the creator app. This allowed Influencers to earn commissions on their livestreams and rise through tiering levels within Amazon Live. This gamification gave Influencers the ability to boost sales and increased the creator count in our program from under 2K to over 15K.

   • AWS Elastic Block Store

     Software EngineerMar 2018 – Sep 2018

     • Oversaw operations for the API services of AWS Backup Service (ABS), a highly scaled distributed system with $2.9 billion in revenue in 2017

     • Facilitated the development of Data Lifecycle Manager for ABS: a new product that allows customers to automate the process of backing up data stored on EBS volumes by creating policies based on AWS tags

   • Prime Pantry

     Software Engineering InternMay 2017 – Aug 2017

     • Designed and implemented a web tool for the Prime Pantry team

     • Reconstructed the mapping-update process between customers and Amazon fulfillment centers, reducing the execution time from days to minutes.

4. May 2016 – Aug 2016

   

   IBM (opens in new tab)

   • Watson Research

     Software Engineering InternMay 2016 – Aug 2016

     • Developed a highly concurrent DRAM memory and memory controller simulator used as part of an ongoing project with the Department of Energy.

     • Researched performance and modeling errors for existing open-source memory simulators.

5. May 2015 – Aug 2015

   N

   Nielsen (opens in new tab)

   • Open API Platform

     Software Engineering InternMay 2015 – Aug 2015

     • Assisted in developing the API platform for Nielsen’s data resources by implementing two unique APIs for the Nielsen Open API Platform.

     • Created profit-producing partnerships for Nielsen through the development of web-apps, which showcased the usage of Nielsen APIs.

Connect

GitHub

@michael-cohen-io (opens in new tab)

LinkedIn

/michael-cohen1995 (opens in new tab)

X / Twitter

@pwincessmichael (opens in new tab)

Email

micohen13@gmail.com