Srdjan Rakic@CowboyDev

Senior Web Engineer & Architect | Frontend | DeFi, Web3, Crypto | Prediction Markets & Real-Time Trading | AI-Native Engineering Working at @Polymarket

github.com/WingsDevelopment
Joined June 2025
1 Photos and videos
Great job team ! 💪💪
Josh
@devjoshstevens
Sep 25
Events on Polymarket now open ~4x faster.
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Josh
@devjoshstevens
Sep 16
One of our complaints from traders: the UI optimised orders for speed, not correctness. Some flows updated positions before the exchange responded, then corrected them later if the order was partially filled or failed, but this caused late updates, incorrect states, and failed sells. Now that our indexing and data API is much more performant, we changed this so that market buys and sells wait for the trade response; fills, partial fills, rejections and errors show immediately. This also improves correctness and sell success rate, making it safer and better to trade.
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Aaron Geryt
@aarongeryt
Apr 7
The protocol works. Here’s what did not. My honest account of the last 18 months at @eulerfinance euler.finance/blog/euler-q1-…
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Poor frontend architecture quietly burns money in DeFi. More hooks → more RPC calls → more complexity → more maintenance time. I wrote about structuring data flow so code, performance, and costs stay predictable. New post 👇
Srdjan Rakic@CowboyDev
Jan 27
Article

Handling Multiple Data Sources in DeFi Frontend Architecture

Since a lot of people showed interest in my last blog post about architecture, I decided to start a blog series to address common questions and dilemmas you might be facing. Context: Why This Series

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Article

Handling Multiple Data Sources in DeFi Frontend Architecture

Since a lot of people showed interest in my last blog post about architecture, I decided to start a blog series to address common questions and dilemmas you might be facing. Context: Why This Series

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kanv
@gupta_kanv
Jan 22
introducing euler skills to use, npx add-skill euler-xyz/agent-skills --skill euler-vaults
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kanv
@gupta_kanv
Jan 16
launching markets on @eulerfinance will soon take <30 seconds : ) dm for early access
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Euler Labs
@eulerfinance
Jan 12
Article

The Architecture That Fixed Euler’s Frontend Performance

Written by Srdjan Rakic (@CowboyDev) Modern DeFi frontends try to provide maximum transparency: Everything fetched onchain, everything computed live, everything reactive. This works beautifully at the

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Working on new UX for your swaps in @eulerfinance forms, inspiration taken from world's leading DEX-es, you will soon be able to pick quotes yourself! Work in progress:
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If your Web3 data-fetching hooks keep growing and getting harder to reason about — this post is for you. A simpler Fetch → Mapper → UI approach 👇 dev.to/92srdjan/the-web2-men…

The Web2 Mental Model Doesn’t Work in Web3

The Right Way To Fetch On-Chain Data Goals of this Post Developer...

dev.to
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React devs 👋 We’ve renamed and published react-display-value 🎉 A lightweight React library for consistently displaying values: • money • percentages • token amounts Built with async states in mind (loading / error / success) and plays nicely with TanStack Query. npmjs.com/package/react-disp…
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React devs, meet #reactDisplayMoney.Formatting numbers in React gets messy, so I built a lightweight library for money, percentages, and token amounts, with easy Tanstack Query compatibility. github.com/WingsDevelopment/…

GitHub - WingsDevelopment/react-display-money: react-display-money

react-display-money. Contribute to WingsDevelopment/react-display-money development by creating an account on GitHub.

github.com
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Gaining some more stars on github! 😌 Make your life easier, try wagmi-extended! npmjs.com/package/wagmi-exte… #wagmiExtended #web3 #DeFi #wagmi #viem #ethereumdev #ethdev
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steady 100+ downloads/week for a month. guess builders finally got tired of managing race conditions manually 😌 make your life easier, try wagmi-extended! npmjs.com/package/wagmi-exte… #wagmiExtended #web3 #DeFi #wagmi #viem #ethereumdev #ethdev
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Srdjan Rakic retweeted
Euler Labs
@eulerfinance
29 Sep 2025
We blinked and @Plasma hit $500M. All in just 4 days, with Pendle integration coming soon.
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Another week, another web3 lib with a discord… 👀 👉 discord.gg/XQYzXgq2Ve come cry about txs, race conditions & bad error messages with us 🫡 #wagmiExtended #web3 #wagmi #DeFi #Ethereum

Join the Wagmi-Extended Discord Server!

Check out the Wagmi-Extended community on Discord - hang out with 6 other members and enjoy free voice and text chat.

discord.com
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Srdjan Rakic retweeted
Euler Labs
@eulerfinance
9 Sep 2025
three billion on eulerswap. three billion on euler lending. growth symmetry looking good here.
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You’re starting a new FE web3 project. You can only put 5 things in dependencies. What are you choosing? 👀 #web3 #DeFi #Ethereum #CryptoDev #BlockchainDev #wagmiExtended #wagmi #viem #npm
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Srdjan Rakic@CowboyDev
2 Sep 2025
Is your flow like 99% of DeFi UX? submit tx → pending → confirm → invalidate → done We’ve all been there. wagmi-extended makes it smoother. npmjs.com/package/wagmi-exte… #wagmi #wagmiExtended #web3dev #DeFi #React #TypeScript #Ethereum
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