Solidity Jobs

We need an experienced Web3 developer to quickly fix a critical bug with NFT rewards in our Unreal Engine 5 game. Problem: After winning a match or completing an achievement, the NFT is not minted or does not appear in the player’s inventory (desynchronization between the game client and blockchain). Task: Reproduce the bug by entering the game Find the root cause (both UE5 and Smart Contract side) Fix the issue Test the fix Requirements: Strong experience with Solidity and Smart Contracts Experience integrating Web3 into games (UE5 is a big plus) Good understanding of NFT minting and event handling We will provide full test server access and all necessary materials after short screening.

Web3 Full Stack Development Team Needed for Blockchain Gaming & Staking Platform We are building a next-generation multi-chain blockchain gaming ecosystem combining staking infrastructure, NFT marketplace functionality, advanced wallet integrations, and immersive gaming experiences for the DeFiHorse ecosystem. We are looking for experienced Web3 freelancers and development teams to help us build and scale a high-performance decentralized platform across multiple EVM-compatible blockchain networks. Project Overview DeFiHorse is a blockchain-based horse racing metaverse and NFT gaming ecosystem featuring staking, NFT assets, wallet integrations, and multi-chain infrastructure. The platform will include: Multi-chain staking infrastructure NFT marketplace Wallet integration (MetaMask...

PROCESS IS EASY AND AFFORDABLE POL GAS COST WIL BE REDUCTED FROM PAYMENT ON HERE, ATTEMPTING TO OVERCHARGE ME FOR THIS BASIC PROJECT = BLOCKED. Description: I’m looking for an experienced blockchain developer to deploy and verify two Solidity smart contracts to Polygon Mainnet. Scope of Work Review and compile two existing Solidity contracts: Deploy contracts to Polygon Mainnet Verify contracts on PolygonScan Configure constructor parameters if needed Ensure optimizer/compiler settings match source code Test successful deployment and basic functionality Provide deployed contract addresses and verification links Optional: assist with ownership transfer / security checks Requirements Strong experience with: Solidity Hardhat or Foundry Polygon Mainnet deployments PolygonScan verific...

VERY EASY AND CHEAP PROCESS POL COSTS GET TAKEN FROM PAYMENT I WILL NOT PROVIDE THE POL IT COMES FROM PART OF YOUR EARNINGS, IF YOU TRY TO OVERCHARGE YOU WILL BE BLOCKED: I’m looking for an experienced blockchain developer to deploy and verify two Solidity smart contracts to Polygon Mainnet. Scope of Work Review and compile two existing Solidity contracts: Deploy contracts to Polygon Mainnet Verify contracts on PolygonScan Configure constructor parameters if needed Ensure optimizer/compiler settings match source code Test successful deployment and basic functionality Provide deployed contract addresses and verification links Optional: assist with ownership transfer / security checks Requirements Strong experience with: Solidity Hardhat or Foundry Polygon Mainnet deployments Polygo...

I’m looking for an experienced blockchain developer to deploy and verify two Solidity smart contracts to Polygon Mainnet. Scope of Work Review and compile two existing Solidity contracts: Deploy contracts to Polygon Mainnet Verify contracts on PolygonScan Configure constructor parameters if needed Ensure optimizer/compiler settings match source code Test successful deployment and basic functionality Provide deployed contract addresses and verification links Optional: assist with ownership transfer / security checks Requirements Strong experience with: Solidity Hardhat or Foundry Polygon Mainnet deployments PolygonScan verification Wallet security / deployment best practices Must have prior smart contract deployment experience Familiarity with arbitrage or executor contracts is a p...

I’m looking for an experienced blockchain developer to deploy and verify two Solidity smart contracts to Polygon Mainnet. Scope of Work Review and compile two existing Solidity contracts: Deploy contracts to Polygon Mainnet Verify contracts on PolygonScan Configure constructor parameters if needed Ensure optimizer/compiler settings match source code Test successful deployment and basic functionality Provide deployed contract addresses and verification links Optional: assist with ownership transfer / security checks Requirements Strong experience with: Solidity Hardhat or Foundry Polygon Mainnet deployments PolygonScan verification Wallet security / deployment best practices Must have prior smart contract deployment experience Familiarity with arbitrage or executor contracts is a p...

We are building Pet360 SaaS Platform, the first blockchain-based pet ecosystem in Brazil (160M pets, zero blockchain infrastructure today). We are adding: • Pet NFT passports (immutable medical history) • Vaccine certificate NFTs • Smart contract adoptions • Pet insurance on-chain As we grow this project, we're expanding our team — especially looking for blockchain developers, designers, frontend engineers and full-stack engineers. This role is fully remote, but please keep in mind that we're looking for someone who can commit to more than 30 hours per week. What truly matters to us is your thinking and how you build. Compensation ranges from $20 to $60 an hour — and it's negotiable. This is a contract position, but there is strong poten...

We are building Pet360 SaaS Platform, the first blockchain-based pet ecosystem in Brazil (160M pets, zero blockchain infrastructure today). We are adding: • Pet NFT passports (immutable medical history) • Vaccine certificate NFTs • Smart contract adoptions • Pet insurance on-chain As we grow this project, we're expanding our team — especially looking for blockchain developers, designers, frontend engineers and full-stack engineers. This role is fully remote, but please keep in mind that we're looking for someone who can commit to more than 30 hours per week. What truly matters to us is your thinking and how you build. Compensation ranges from $20 to $60 an hour — and it's negotiable. This is a contract position, but there is strong poten...

Blockchain Architect / Senior Blockchain Engineer Location: Thiruvananthapuram / Kochi Experience: 5–10 Years Employment Type: Contract – 4 to 6 Months Project Work Mode: Hybrid (2–3 Days Work from Office) Budget: ₹1.2 Lakhs to ₹1.5 Lakhs Per Month About the Role: We are hiring experienced Blockchain professionals for an urgent contract opportunity with one of the enterprise-level clients. We are looking for candidates with strong expertise in Blockchain fundamentals, Blockchain architecture, Ethereum ecosystem, and solutioning capabilities. The ideal candidate should have strong technical expertise along with the ability to guide teams, mentor junior developers/interns, and drive best practices in Blockchain development. Main Skills Required: Bloc...

SOVEREIGN ZK-ATOMIC SWAP IMMUTABLE GROTH16 PRIVACY-SWAP ENGINE FOR TRUSTLESS OTC EXCHANGE Project Details Research Focus: Improving Proof of Work (PoW) efficiency and cross-chain confidentiality via zk-SNARKs. The Groundfloor Opportunity: This project represents a unique opportunity to lead the research and implementation of ZK-SNARKs on a nascent PoW chain. We are aiming to achieve what Zcash did for privacy and what Bitcoin Cash sought for utility, but at a "Groundfloor" level on a Sovereign EVM. As a lead architect, you will not just be coding; you will be officially improving the Bitnet Money blockchain's privacy infrastructure, establishing a reference standard for trustless OTC exchange before the ecosystem scales. Introduction: Polygon proved that you could take the...

Position Details Comapny: Type: Full-time / Part-time Location: 100% Remote Compensation: $195K – $220K Qualifications Strong experience with Solidity and the EVM Ability to architect, implement, and deploy secure smart contracts High attention to detail with a strong sense of ownership Ability to write clean, well-documented code Nice to Have Experience with gRPC / REST API integrations Familiarity with Zero-Knowledge (ZK) concepts and tools (Circom, SnarkJS) Experience with audit tools such as Slither or MythX Ability to read and analyze existing smart contracts Hiring Process Test assignment: practical exercise relevant to the role Technical interview: discussion of your solution and technical approach Final interview: culture fit and expectations Candidates who successfu...

SOVEREIGN ZK-ATOMIC SWAP IMMUTABLE GROTH16 PRIVACY-SWAP ENGINE FOR TRUSTLESS OTC EXCHANGE Project Details Research Focus: Improving Proof of Work (PoW) efficiency and cross-chain confidentiality via zk-SNARKs. The Groundfloor Opportunity: This project represents a unique opportunity to lead the research and implementation of ZK-SNARKs on a nascent PoW chain. We are aiming to achieve what Zcash did for privacy and what Bitcoin Cash sought for utility, but at a "Groundfloor" level on a Sovereign EVM. As a lead architect, you will not just be coding; you will be officially improving the Bitnet Money blockchain's privacy infrastructure, establishing a reference standard for trustless OTC exchange before the ecosystem scales. Introduction: Polygon proved that you could take the...

Rivwake is an ambitious early-stage Web3 metaverse project built on Unreal Engine 5. We are creating Overworld — a next-generation immersive metaverse where players can play, create worlds, games, and assets without coding (strong UGC focus). The first game is Strifest — a team-based arena shooter with building mechanics. The project combines high-quality UE5 gameplay with real blockchain integration: NFT rewards, staking mechanics, token systems, and true digital ownership. Company is registered in the UAE. We are currently in the active alpha stage and actively scaling before the token launch. Who We Are Looking For Web3 Game Developer (UE5 + Blockchain & Smart Contracts) Key Responsibilities: Integration of Web3 features into Unreal Engine 5 game (wallet connect, NFT mi...