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I’m working on a project called Infinity Force — it’s an NFT marketplace platform that’s already in the MVP stage. The base version is done, but it still needs a lot of polish and final touches to get it ready for launch. I had one developer working on it, but honestly, his skill level was too junior for what this project needs, so we had to part ways. Now I’m looking for a strong blockchain/full-stack dev who can pick up where things left off and finish the job right. The MVP is already working — users can mint, list, buy, and sell NFTs. Wallet connections (MetaMask, WalletConnect) are in place, and the UI is built in React / Next.js. But I still need help improving smart contracts, cleaning up the backend, fixing bugs, and getting everything ready for mainnet. Before hiring, I’ll need to test your skills — just a small practical task to see how you handle the code and logic. Nothing crazy, just want to make sure you’re comfortable with the stack. Here’s the tech stack we’re using: ~ Solidity, [login to view URL] / [login to view URL] ~ React / [login to view URL] ~ Node.js / MongoDB ~ IPFS (for NFT storage) If you’re confident with those and have experience building NFT platforms or Web3 apps, I’d love to chat. This is an ongoing project, not a from-scratch build, so you’ll be working with an existing codebase. I’m easy to work with as long as communication is clear and progress is steady. Let’s finish Infinity Force together
ID do Projeto: 39991481
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113 freelancers estão ofertando em média $35 USD/hora for esse trabalho

Hello, I hope you are doing well. I’ve built and upgraded several NFT marketplaces, so picking up your existing codebase and polishing Infinity Force feels like a perfect fit. I’m comfortable auditing and improving Solidity contracts, tightening the Node and Mongo backend, and fixing React and Web3 integration bugs fast. My workflow is simple: review the repo, fix critical issues first, optimize smart contracts, clean the UI logic, then fully test minting, listing, buying and selling before mainnet. If you’d like, I can complete your test task right away. Let me know the next steps.
$38 USD em 40 dias
5,1
5,1

Hello, I am really excited about the opportunity to collaborate with you on this project! It aligns perfectly with my skill set and experience, and I’m confident I can contribute meaningfully to your vision. I genuinely enjoy working on projects like this, and I believe we can create something both functional and visually engaging. Please feel free to check out my profile to learn more about my past work and client feedback. I’d love to connect and discuss the project details further your goals, expectations, and any specific features or ideas you have in mind. The more I understand your vision, the better I can bring it to life. I am ready to get started right away and will put my full energy and focus into delivering quality results on time. My goal is not just to complete the project, but to exceed your expectations and build a long-term working relationship. Looking forward to hearing from you soon! With regards! Divya
$25 USD em 40 dias
4,8
4,8

Problem It’s incredibly frustrating to have Infinity Force so close to launch, only to be held back by unfinished details, smart contract issues, and lingering bugs. I can see how the last developer’s lack of experience slowed things down and left you with an MVP that isn’t quite ready for mainnet. Solution With a strong hand on both blockchain and full-stack development, I can quickly elevate your NFT marketplace, ensuring the backend is solid, contracts are reliable, and the platform is ready for users. You’ll see Infinity Force polished for a confident and stable launch. Plan First, I’ll dive into your current codebase to get up to speed and spot any immediate gaps. Next, I’ll tackle the smart contract improvements and backend cleanup you need. Finally, I’ll smooth out any bugs and make sure everything is mainnet-ready. Could you share the details of the practical test when you’re ready?
$38 USD em 40 dias
3,9
3,9

Hello, I am an expert with 15+ years of experience in the technical world, delivering simple to complex websites, e-commerce platforms, membership systems, and custom portals. I always provide clear communication, continued support after delivery, and 100% client satisfaction. I specialize in Node.js development, creating secure, scalable, and high-performance backend systems with RESTful APIs, real-time applications, and database integration (MySQL, MongoDB, etc.). My focus is on building future-ready applications with clean and optimized code. If you are looking for a dedicated Node.js expert who delivers quality, innovation, and timely results, I’d be glad to work on your project.
$25 USD em 40 dias
3,6
3,6

Hi Mark, I’ve developed multiple NFT marketplaces, including one where we integrated both OpenSea and Rarible APIs for minting and listing NFTs. I also have extensive experience with Solidity smart contracts, having worked with versions from 0.4.11 to 0.8.19. In addition to my blockchain expertise, I’m a full-stack developer with 15 years of experience in PHP, JavaScript, and modern frameworks like Laravel and Next.js. I’ve led multiple startups as a CTO, so I understand the importance of delivering a complete product rather than just working on isolated tasks. I’m also a strong advocate for agile development and prefer to work in short, focused sprints to deliver fully functional features quickly. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit for your needs. I’m eager to learn more about Infinity Force. Best, Adil
$50 USD em 21 dias
3,6
3,6

Hi Mark B. I’ve carefully read your project details "Infinity Force NFT Marketplace Development" and I’m confident I can deliver exactly what you’re looking for. With 5+ years of experience, 400+ 5★ reviews, and 500+ completed projects, I specialize in building high-performing websites, Shopify/WordPress solutions, and SEO-optimized platforms that drive real results. ★ Why Clients Choose Me Proven Track Record → 400+ reviews, 500+ projects Web Expertise → WordPress, Shopify, wix, Laravel, React, Vue.js, PHP, Python and more E-commerce & SEO → Store setup, payments, on-page SEO, performance boost UI/UX Design → Modern, responsive, conversion-focused On-Time & On-Budget → 96% timely, 97% within cost Reliable Support → Free 1-month help + long-term maintenance Secure Solutions → Backups, security & optimization Risk-Free Guarantee → No upfront payment. Pay only when satisfied, with full money-back assurance. If you want a professional developer who delivers on time, on budget, and stress-free, let’s connect. I’ll turn your vision into a secure, rapid, and growth-focused digital experience. Best regards, Kausar Parveen
$50 USD em 40 dias
3,5
3,5

Hello, I checked your job listing and I am very confident that I check all boxes you need. I have rich experience with the skills in your project. Hope to discuss more details with you. Best wishes.
$38 USD em 40 dias
2,1
2,1

Hello, I understand you're looking to enhance the Infinity Force NFT marketplace and ensure it’s fully ready for launch. Your project has made great strides, and it sounds exciting! I specialize in blockchain and full-stack development with a focus on NFT platforms. In my recent projects, I've successfully led the development of marketplaces similar to yours, navigating complex smart contracts and optimizing back-end performance. This experience allows me to bring a high level of expertise to the table and ensure that all aspects of your platform function smoothly. ✅My Plan: - Review and improve existing smart contracts for efficiency and security. - Clean up the backend to ensure optimal performance related to Node.js and MongoDB. - Fix bugs identified during the testing phase. - Assist in final preparations for the mainnet launch. I understand you want to assess my skills with a practical task—could you share more details about it? Also, what key features are you most focused on refining before launch? Best regards, Hongqiang Chen
$25 USD em 28 dias
0,0
0,0

Hi Mark, I’m Robert, a Senior Full-Stack & AI Engineer with over 10 years of experience architecting and delivering SaaS platforms, automation systems, and intelligent applications, specializing in Blockchain development, Smart Contracts, and Web3 technologies. I have successfully enhanced NFT marketplaces, ensuring seamless user experiences and robust smart contract functionality. My recent project involved optimizing a multi-chain NFT platform using Solidity and React, significantly increasing transaction speed and reliability. With my expertise, I can refine your existing Infinity Force marketplace, improving smart contracts, enhancing backend stability, and debugging any issues. I can complete this project perfectly and deliver scalable, production-ready results. I’m committed to clean architecture, structured documentation, CI/CD automation, and adhering to security best practices. Let’s connect to refine your requirements and begin building a solution that exceeds expectations. What specific improvements are you hoping to see in your smart contracts for the marketplace?
$50 USD em 20 dias
0,0
0,0

✋ Hi Mark B., I hope you're doing well. I read your requirements carefully and understood very well about the project scope and start working accordingly in stages. I am having more than 6 years of experience in Node.js, Blockchain and I believe that I can start working step by step and achieve the project goal in short time frame. I look forward to hear from you soon. Let’s discuss further. Best Regards.
$38 USD em 40 dias
0,0
0,0

Hi, Could you share a bit more about the specific improvements you’re looking for in the smart contracts and backend? I understand the importance of refining existing code. With over 5 years of experience in blockchain development and a strong command of Solidity, React, and Node.js, I can efficiently enhance your MVP. I’ve previously worked on NFT platforms, so I know the common pitfalls and how to avoid them. I’m ready to take up your practical task to demonstrate my skills. I’m all about clear communication and consistent progress, ensuring we push Infinity Force to launch successfully together. Looking forward to discussing this further! Best Regards,
$45 USD em 40 dias
0,0
0,0

We finish messy MVPs into launch-ready products (NFT marketplaces, wallet flows, IPFS, React/Next + Solidity) so Infinity Force is exactly our wheelhouse. I’ll pick up your codebase, harden smart contracts, fix backend bugs, tighten IPFS flows, polish UI/UX edge-cases, and prepare mainnet-ready deploys with tests. Realistic rate: $40–$55/hr (your $25–50 range is doable but expect senior-quality work near the top). ETA for a full polish + audit checklist: 3–6 weeks depending on tech debt. Can you share a read-only repo link and the small practical test task now so I can scope exact hours and start immediately?
$50 USD em 40 dias
0,0
0,0

Hello, I hope you’re doing well. I’m a Senior JavaScript & Node.js Engineer (15+ years experience) with extensive hands-on expertise in modernizing front-end codebases, upgrading Node.js environments, and improving legacy systems without breaking existing functionality. I’ve worked with enterprise products (including Samsung platforms) where modernization, code refactoring, and performance stability were critical. I’m very comfortable working with older code, identifying hidden issues, optimizing architecture, and safely migrating to newer versions.
$38 USD em 40 dias
0,0
0,0

Hi We are a legal entity from India and have ready code of NFT Marketplace so we can help you to jump in market within no time. Lets connect and share insights
$25 USD em 40 dias
0,0
0,0

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