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I’m building a DeFi application on Ethereum that combines a Uniswap-style decentralized exchange with a yield-farming / staking module. The work covers the full stack: Solidity smart contracts, a clean web interface (React + [login to view URL] or [login to view URL]), and deployment to mainnet once we have passed testing and a light security review. Smart-contract scope • Automated-market-maker DEX contracts (AMM logic, liquidity pool creation, swap, add/remove liquidity, LP token mint/burn) • Farming contracts that let users stake LP tokens (and optionally the platform’s governance token) to earn rewards on a customizable schedule • Role-based access for admin functions, pausable safety switches, and OpenZeppelin libraries for upgradability and security Front-end & integration The dApp should connect smoothly through MetaMask or WalletConnect, display pool metrics in real time, and guide users through providing liquidity, staking, claiming rewards, and withdrawing. I’m fine with either Hardhat or Truffle for the dev environment; unit tests in Mocha/Chai are a must. Acceptance criteria • All Solidity code compiles under the latest stable compiler, passes 90 %+ test coverage, and is formatted per Prettier-Solidity • Gas usage optimized and no high-risk findings in a basic MythX or Slither scan • Front-end loads in under 3 s, correctly reflects on-chain state, and works in Chrome/Brave + mobile MetaMask • Complete README with deployment scripts and instructions Please tell me about your experience with similar Ethereum AMM or farming contracts, security practices you follow, and a rough timeline for delivery of each milestone (contracts, front-end, final deploy).
Project ID: 40391632
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62 freelancers are bidding on average $453 USD for this job

Hello, I’ve built AMM-style DEXs and farming modules before, focusing on clean Solidity logic, gas efficiency, and simple integrations through React and ethers.js. I can help you put together a smooth flow from swaps to LP staking while keeping everything safe with role-based controls and tested contracts. I keep things straightforward, from clear AMM math to readable staking logic and front-end calls that just work. I’ll walk through every part so your users can trade, stake, and claim without friction. Thanks, Teo
$300 USD in 3 days
6.8
6.8

Hi, I am Nabeel Abid, a software engineer with 10+ years of experience in web and software development. I have a solid background in delivering scalable and efficient solutions across various industries, ensuring that I meet both client expectations and project timelines. My expertise includes technologies such as JavaScript, Python, and PHP, along with frameworks like React and Django. I understand the uniqueness of your project and the importance of choosing the right developer. I am confident in my ability to bring your vision to life, leveraging my knowledge to create high-quality software tailored to your needs. Reliability is key in my work; I prioritize communication and transparency to ensure that we are aligned at every step of the process. I look forward to the opportunity to discuss how I can contribute to your project's success. Regards, Nabeel Abid
$675 USD in 5 days
6.8
6.8

Hi! My name is Marjan and I'm here to offer you my services as a skilled applicant with over a decade of experience working on Freelancer.com. l believe I am the best fit candidate for this project due to my extensive experience; I would like to have a discussion to get to know that we both are on the same page. Once the scope will be locked, I will start working on it right away.
$250 USD in 7 days
6.6
6.6

Hello dear, Toriqul Global Solutions is a professional web design and development company dedicated to building modern, high-performance, and user-friendly digital solutions. Founded by Engineer Md. Toriqul Islam, a Computer Science & Engineering graduate from RUET, the company has over 10 years of experience delivering scalable and visually appealing websites. Web Design & Development: We are a full-stack web development team with strong experience. Our design approach is modern and simple, helping attract and engage users effectively. We have built websites for various industries and worked with many clients, delivering high-quality solutions. Client satisfaction is always our top priority. Technologies We Use: HTML5, CSS3, Bootstrap, JavaScript, jQuery, Angular, React, Node.js, WordPress, PHP, Laravel, .NET, CodeIgniter, Python, Ruby on Rails, MySQL, MongoDB. Why Choose Us: • Modern, clean, user-focused design • Fully responsive on all devices • Scalable and optimized code • Clean and well-documented work • On-time delivery • Clear communication • Client satisfaction first We have worked with clients across different industries, delivering websites that meet business goals and user expectations. Let’s build something great together. We are ready to discuss your project and start immediately. Best Regards, Toriqul Global Solutions
$250 USD in 7 days
6.1
6.1

Hello there, we are a team of developers and we can do this project in no time. Thanks Aashish Kumar from Coding jobs On-line.
$500 USD in 7 days
5.8
5.8

Hi, I have reviewed the details of your project. I can handle this and have strong experience building DeFi platforms with AMM DEXs, staking, yield farming, and secure smart contract architecture on Ethereum. I’ll build the full flow from Solidity contracts to React frontend, wallet integration, testing, security checks, and mainnet deployment with clean documentation. I’d love to discuss your exact farming logic, reward structure, and project goals so we can plan the best approach. Let’s have a quick meeting and get this started!!!
$500 USD in 7 days
5.6
5.6

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 PHP development, building secure, scalable, and high-performing web applications with custom scripts, API integration, and database management (MySQL, MariaDB, etc.). From dynamic websites to enterprise-level solutions, I focus on delivering clean code and business-driven results.
$250 USD in 7 days
5.2
5.2

are you going v2 style constant product or closer to v3 concentrated liquidity? the staking logic ties directly into which AMM model you pick, completely different reward distribution patterns. deployed a few defi protocols on mainnet and layer 2s, can have core swap contracts plus staking module ready in about 10 days with hardhat test coverage. can start today. want me to sketch out how i'd structure the contracts first?
$450 USD in 21 days
4.5
4.5

As an experienced full-stack web developer, I've honed my skills to maximize user experience and ensure smooth functionality across different platforms. Not only am I in the top 5% of Full Stack Devs, but also in Global Talent, an indicator that I've consistently delivered great value to my clients. My arsenal of development tools includes React.js and Node.js, perfect for creating a clean and intuitive interface for your Ethereum DeFi DEX project. On the backend, I specialize in Python and have ample experience working with Solidity - essential for building the automated-market-maker DEX contracts and farming contracts you need. Furthermore, I prioritize security just as much as usability. My approach involves incorporating OpenZeppelin libraries for upgradability and security - necessary elements in a reliable DeFi application like yours. I'm confident about delivering all the key milestones - from Solidity contracts, a well-functioning frontend to final deployment on mainnet with thorough testing under the deadlines we'll establish together. Let's build an innovative & secure DeFi platform that stands above the competition!
$250 USD in 2 days
4.4
4.4

Deploying a DeFi ecosystem is not a matter of forking code; it is an engineering challenge where gas efficiency and contract security define the survival of your protocol. Most bidders will deliver a vulnerable "Uniswap-clone" that will likely suffer from front-running issues or drain user rewards through non-optimized liquidity logic. As a Software Architect specialized in mission-critical systems and secure financial ecosystems—such as my Meta-verified Antigravity CRM—I build deterministic DeFi architectures where fund integrity is the absolute priority. My approach for your DEX & Staking module: Gas-Optimized Liquidity Logic: I implement high-efficiency AMM contracts designed to minimize Gwei consumption per swap, ensuring your pools remain competitive and attractive for LPs. Deterministic Reward Orchestration: A robust farming architecture with atomic state updates to prevent "phantom rewards" and ensure 100% precision in distribution schedules. Industrial-Grade dApp Integration: A high-performance React interface with resilient state-syncing, ensuring users never see mismatched on-chain data during high-volatility events. I invite you to review my profile to validate the production-grade systems and secure architectures I maintain. Does your tokenomics model require a fixed emission rate for rewards, or should the farming contract implement a dynamic decay schedule to protect the platform's long-term liquidity? Sebastián Calvo | Wave Studio Design
$500 USD in 7 days
4.5
4.5

Respectively Sir/Ma'am, Have a Pleasant Day Ahead ! I carefully had read your requirements in your job post on freelancer.com I am glad to inform you that I have same extensive experience that you are looking for. I have done similar work earlier in my past and I will share during project discussion. Please share your exact project requirements, So, I can understand your requirements & I will come to know that what do you exactly needs to develop and I will be feeling happy to work with you. Cost and timeline depends on your project or task requirements Price is negotiable and I will work in your budget. No upfront payment will be charged. Always work in milestones. Looking forward for your positive response. Kind Regards, Sneha Kanwar
$500 USD in 7 days
4.7
4.7

Hello, The main engineering challenge involves ensuring robust security in smart contracts while managing complex interactions between liquidity pools and staking mechanisms. Additionally, real-time data synchronization for on-chain state updates is critical to provide users with accurate information. Will the architecture require integration with any existing DeFi protocols or will it be built entirely from the ground up? What specific security measures are you considering to mitigate risks associated with smart contract vulnerabilities? Also, how do you envision handling potential scalability issues as user adoption increases? I look forward to discussing the project further and exploring how I can contribute effectively.
$250 USD in 7 days
3.5
3.5

Hello, I have 8 years of experience in Ethereum development, specializing in Solidity smart contracts and React web interfaces. I understand your project requirements for building a DeFi application on Ethereum that includes a DEX and staking module. I am confident in providing a professional solution that covers the full stack development, including AMM logic, liquidity pool management, staking contracts, and a user-friendly web interface. As a Professional Web Developer & Creative Designer with expertise in Web Development & Social Media Marketing & Management, I am well-equipped to deliver a high-quality solution that meets your expectations. Let's discuss further details in the chat to ensure a successful collaboration. Best regards.
$500 USD in 7 days
2.6
2.6

Hi, I have read your description and I fully understand your needs. I am a senior engineer with over 7 year of experience on PHP, JavaScript, Software Architecture, Software Testing, Ethereum, Solidity, Smart Contracts, Web3.js. Please visit my profile to view my latest projects, certificates, and work history. Let's connect in chat to discuss more. Thank you, Matheus
$500 USD in 7 days
0.6
0.6

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