VP, Engineering Defi @polymarket • prev SVP, Engineering at @aavejoshstevens.io

Joined June 2021
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Excited to join @Polymarket as VP of Engineering. I haven’t seen a hungrier team in my career, the talent density here is insane. We’re building the future of how people understand the world. What should we build next? What’s broken? What’s missing? Drop it below. P.s we are hiring world class people in NYC DMs open
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Josh retweeted
New Esports page is fresh polymarket.com/esports
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Combos are coming to polymarket.com very soon. If you're a market maker, start quoting from tomorrow with our simple SDKs 👀
Replying to @Polymarket
@Polymarket is launching combos soon. Take a look at our new docs, and happy quoting! Docs: docs.polymarket.com/market-m… Quoter Telegram: t.me/ 7j9GsyNe7jBiOGMx
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Josh retweeted
we're growing our product team at Polymarket work with @shayne_coplan and I on the future of prediction markets and ship crazy zero to one ideas to millions of users Email dustin@polymarket.com with your best work
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Josh retweeted
Friday Update - Week of June 1st, 2026: - CLOB performance: long-awaited taker-delay fix landed in production this week as part of broader execution-path improvements, together with a new trading gateway. Large latency reduction and better stabilization under load. More architectural work continuing - World Cup launches: final testing pre-release next week - Beacon Deposit Wallet: new version launching 6/11 (moved from 6/8), for new users - Taker Rebates: prod rollout started, tier badges live on leaderboard, expanding across the UX next week - Market Resolution upgrade: large improvements in consistency and speed - Perps: continuing access rollout to users; taker delay, reduce-only, and TP/SL shipped to production testnet; Limit Close on open positions, trading directly from the chart, and mobile UX improvements - In-house indexer: preparing for full production rollout, big performance gain on high-traffic endpoints - TS SDK: RFQ support released; World Cup feature support and docs wrapping next week
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Imagine being able to do an OTC trade with anyone, peer-to-peer, in any market, live on Polymarket. Incoming 🔜
We're excited to announce Polymarket has facilitated the first ever on-chain, institutional block trade in the prediction market space. Institutions using Polymarket to hedge GPU compute exposure at scale give a glimpse into both the future & the promise of prediction markets.
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Allowing more people in to try out perps with one ask: give us feedback on everything you did not like/think could be better about the UI. DM your Polymarket username, and we will get you added.
Polymarket is excited to enter the perps space. We will be giving beta access to more people over the coming weeks. If you are interested in being part of the beta release, DM me.
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Thanks to everyone who tested with me over the last 2 hours; we gained some really amazing feedback. Won't be allowing anyone else on my side for the rest of the night, but still, DM may let some more in tomorrow.
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Josh retweeted
Friday Update - Week of May 25th, 2026: - Perps live in production: launched with 5 tradfi pairs and 1 crypto pair (BTC); more instruments and user access upcoming - World Cup pages live: Globe/Map, Bracket and standings shipped - World Cup launch features in final testing - CLOB performance: Order Book consistency improvements shipped this week, with deeper architectural changes underway and a release next week to address queue congestion - SDKs open-sourced: TS SDK with runnable examples, Python SDK with improved public docstrings, multiple beta feedback items addressed - Unified API: kicked off, first Gamma endpoints wrapped - Gamma: tighter keyset pagination and indexes on high-traffic read paths, production correctness fixes across users, profiles, comments and sports summary
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Polymarket is excited to enter the perps space. We will be giving beta access to more people over the coming weeks. If you are interested in being part of the beta release, DM me.
Perps beta is now live on polymarket.com for select users. We’ll be rolling access out to more people over the next 4 weeks. Get ready.
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What a day, but on a more positive note, we did a release this morning, and the latency on the CLOB is now 500% better. You should see a huge difference. Thanks for waiting for the fix. It was a hard one because it was at the lowest level of the services. We have many other fixes coming in the next weeks to take this down even further.
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With @zachxbt leading the effort alongside @Bitcoin_Vietnam and @ChangeNOW_io, we managed to freeze $164,000 of the $573,200 in funds transferred from the compromised private key. Really was a team effort, and it was amazing how quickly everyone reacted. Thanks to everyone who helped on this.
No polymarket or UMA contracts have been exploited. All user funds are safe, and using Polymarket.com is safe, so business as usual. We had a 6-year-old private key that was compromised. This was in the internal top-up config, which is why funds were being sent to it. We have rotated this key, revoked all prod permissions and are moving all PKs to KMS keys from now on.
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No polymarket or UMA contracts have been exploited. All user funds are safe, and using Polymarket.com is safe, so business as usual. We had a 6-year-old private key that was compromised. This was in the internal top-up config, which is why funds were being sent to it. We have rotated this key, revoked all prod permissions and are moving all PKs to KMS keys from now on.
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Josh retweeted
Replying to @rb_tweets
We are investigating this but is not a contract hack this looks like a very old PK which has been compromise - we working on it
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Josh retweeted
We’re aware of the security reports linked to rewards payout. User funds and market resolution are safe. Findings point to a private key compromise of a wallet used for internal top-up operations, not contracts or core infrastructure. More updates to follow.
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Josh retweeted
Introducing taker tier rebate program - poly.market/taker-tier Get rebated up to 50% of all trading fees on polymarket, earn $ level up bonuses, and be eligible for large future rewards. Will be live starting next week 🙂
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Introducing the unified TypeScript and Python SDKs, now in beta. One consistent surface for Polymarket discovery, market data, trading, account data, and realtime streams. Python ships with both async and sync clients, so you can choose the model that fits your app. Docs: docs.polymarket.com/dev-tool… Coming soon: unified API, Rust SDK, and React SDK. Our goal is to build the best developer tooling for Polymarket integrations. Feedback welcome: drop it in the discord dev channel, reply here, or DM me.
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Josh retweeted
We're excited to announce our exclusive partnership with Nasdaq Private Market. Retail traders can now get exposure to private companies, one of the historically most profitable asset classes, exclusively through Polymarket.
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Josh retweeted
Friday Update - Week of May 11th, 2026: • CLOB latency: The team is fully focused on it, and a series of releases targeting latency reduction and execution consistency are happening over the next week • In-house indexer: in final testing stages, showing a big speed increase over the legacy path; first three high-traffic data-api endpoints already cut over on staging, production rollout next • Large feature release in the works for the World Cup: more details soon • TS SDK: beta complete: hardened auth teardown response parsing cleanup • Python SDK: Gamma Data read coverage complete, CLOB auth/signing/reads, order workflows (limit/market, cancel, allowance checks), rewards/scoring/earnings support, WebSocket foundation initial CLOB market stream • API Gateway: (unified entry point for Polymarket APIs, with Developer API Keys) in progress • Gamma: new similar-events endpoint shipped; OpenAPI migration advancing across major route groups; pagination behavior tightened • Dev Rel: builder outreach ramping and working on a developer tooling directory • User Provided Liquidity rewards: re-enabled in prod, adapted for pUSD
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Looking for the best design engineers in the world to work on Polymarket. Polymarket.com is your canvas and your job is making it 1% better every day. Full creative control, own every pixel. DM me your GitHub/portfolio and show me why you're the best in the world.
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Much of Polymarket's core trading infrastructure was built years ago and is now being rearchitected to handle today's scale. ClobV2 with deposit wallet was the top non-negotiable priority because it's what prevents ghost fills the added latency you've seen since v2 mostly comes from new order and wallet validation infrastructure. With that protection in place, reducing latency to the fastest we ever had it is now our single biggest focus. Over the next two weeks we have a series of releases dedicated to bringing latency down. Broadly, they target: - Rewriting one of the slowest internal steps in the order flow. - Smarter handling of activity bursts, aiming at reducing backed-up queues. - Reworking the order book and its data flow. The single biggest latency reduction in the plan. The first release in this series went live today. Expect the next latency releases toward the end of this week and next week.
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