Arbmarket

Arbitrum Chain Based Prediction Platform

[Arbmarket @Arbmarket]

Hey — been following your work and tweat, really solid stuff.

I'm building ArbMarket, a decentralized prediction market protocol on Arbitrum (think Polymarket, but Arbitrum-native). We've got a working MVP shipped and are looking for a Lead Developer to take it from here through mainnet — smart contracts, indexer, the full stack.

Remote, trial-to-full-time, equity-weighted comp targeting €90k+ once converted. Real ownership, not a spec to execute.

Worth a quick chat? Happy to share the whitepaper and repo either way.

[Arbmarket @Arbmarket]

🚨 Hiring Lead Blockchain Dev @ ArbMarket

Building Polymarket-style prediction markets natively on Arbitrum.

We already have a working React + Node MVP.
You own the real thing:
• Smart contracts (factory, AMM, outcome tokens, fees)
• Optimistic oracle (UMA-style)
• Indexer + wagmi migration
• Technical leadership

Must: production Solidity + dApp experience
Bonus: AMM / prediction markets / Arbitrum / oracles

Remote • Trial → full-time • Equity-heavy (€90k+ target)

DM with GitHub + past contracts if this is you.

[Arbmarket @Arbmarket]

Lead Blockchain Developer — ArbMarket (Prediction Market Protocol on Arbitrum)

ArbMarket is building a decentralized, non-custodial prediction market protocol on Arbitrum — think Polymarket, but Arbitrum-native from day one, with plans for ARB-denominated markets and Arbitrum ecosystem grant/incentive integration.

We've already shipped an MVP: a working React frontend backed by a Node.js/Express API that mimics the on-chain flow (market creation, AMM-style pricing, orders, positions, comments). The next phase is the real one — smart contracts on Arbitrum, an indexer replacing the mock backend, wallet-native trading, and an optimistic-oracle resolution system. That's what this role owns.

Why we're hiring: Our previous lead developer had to step away for health reasons. The MVP and architecture are solid and well-documented — you're not starting from zero, you're taking over a scoped, working foundation.

What you'll own:

Smart contract architecture (market factory, outcome-token minting/redemption, AMM pools, fee distribution, resolution module) on Arbitrum
Migrating the frontend from the mock REST backend to a real indexer + direct contract calls (wagmi/RainbowKit wallet integration)
Optimistic-oracle resolution design (propose → dispute window → finalize, UMA-style)
Technical leadership as we scale the eng team post-conversion
What we're looking for:

Strong Solidity / EVM smart contract development experience (production-shipped, not just tutorials)
Hands-on dApp development experience — frontend-to-contract integration, wallet connection flows, subgraph or custom indexers
Comfortable in React.js and Node.js/Express (you'll need to read and extend our existing MVP codebase)
Bonus: AMM or prediction-market-specific experience, familiarity with optimistic oracle patterns (UMA or similar), Arbitrum-specific deployment experience
Arrangement: Fully remote. Starts as a trial contract, converting to full-time. Compensation is weighted mostly toward equity with total comp targeted at €90k+ once converted — full structure discussed in the final interview stage.

[Arbmarket @Arbmarket]

Lead Blockchain Developer — ArbMarket (Prediction Market Protocol on Arbitrum)Lead Blockchain Developer — ArbMarket (Prediction Market Protocol on Arbitrum)

[Arbmarket @Arbmarket]

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