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Project overview Web development / New project Expected to be completed by Sep 05, 2026 Request details Project Overview I'm looking for an experienced Solidity/Web3 developer who can build a smart contract that integrates with Aave V3 and can receive a flash loan of USDT liquidity. The goal is to have the entire process execute atomically in one blockchain transaction. Required Logic The smart contract should: Initiate/receive a USDT flash loan from Aave V3. Receive the flash-loaned USDT into my smart contract. Transfer the borrowed USDT from the smart contract to another wallet that I control. Allow me to perform my required strategy/work with those funds. Have the necessary logic to return the required principal + Aave flash-loan fee back to the smart contract within the same transaction. Repay Aave V3 automatically before the transaction completes. Revert the entire transaction if the required amount cannot be returned and the flash loan cannot be repaid. What I'm Looking For I need someone who is comfortable with: Solidity smart-contract development Aave V3 flash loans ERC-20/USDT interactions Transaction atomicity and flash-loan repayment requirements Secure access controls and safe token-transfer logic Testing the contract on an appropriate testnet/fork before deployment The main objective is a simple, reliable flow where the flash-loaned USDT comes into my contract, is transferred to my controlled wallet for my strategy, and the principal plus fee is returned to the contract so that Aave can be repaid all within a single transaction. Please have experience with Aave V3 and flash-loan implementations and be able to explain the architecture and any limitations around having the funds temporarily transferred to an external wallet during the transaction.
Project ID: 40691787
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Active 6 days ago
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67 freelancers are bidding on average $109 USD for this job

With extensive experience in Solidity smart-contract development and Aave V3 flash loans, I can seamlessly build a smart contract to integrate with Aave V3 for flash loan liquidity using USDT. My question: Are there specific strategies or requirements for handling potential network congestion during flash loan repayments? Regards, Yogesh Kumar
$60 USD in 8 days
8.5
8.5

Hello, I see you're looking for a Solidity developer to create a smart contract that will handle flash loans from Aave V3. It’s essential for the contract to manage the entire process within a single transaction, including borrowing USDT, transferring it to your wallet, executing your strategy, and repaying Aave with the required fees. With 7+ years of experience in Solidity and smart contract development, I’m confident in my ability to craft a secure and efficient solution for you. My background includes working with ERC-20 tokens and ensuring transaction atomicity, which will help in meeting your project's requirements. Additionally, I can thoroughly test the contract on a suitable testnet before deployment to ensure everything runs smoothly. You can check out my work at https://pixoriq.com. One question I have is, do you have a specific strategy in mind for using the flash-loaned USDT, or are you open to suggestions? Best regards, Ivan Mandinski
$50 USD in 3 days
7.6
7.6

Hi, I went through your project details and understand what you're looking to achieve. I'd be interested in working with you on this. Based on the requirements you've shared, I can handle the project from start to completion while keeping the work aligned with your expectations, timeline, and desired outcome. My approach is straightforward: first, I'll make sure the requirements and expected deliverables are clear. Then I'll complete the work in structured stages, share progress along the way, incorporate your feedback, and deliver the final work after everything has been reviewed. Before we begin, I have a couple of questions about your requirements that will help me understand the scope more accurately. Feel free to message me so we can discuss the details and determine the best way to move forward. Best regards, Anum
$250 USD in 1 day
6.7
6.7

Hi, Warm regards from Syndell! Your Aave V3 USDT flash-loan smart contract needs careful Solidity development to execute atomically and handle repayment logic securely. We specialize in Web3 infrastructure and understand the nuances of flash-loan mechanics, token transfers, and transaction reversal handling that keep your strategy safe. Our approach combines thorough contract architecture with security-first practices to ensure your funds move seamlessly through the protocol. What's your timeline for deployment, and are you targeting Ethereum mainnet or a layer-two network? Our team of developers, designers, and marketers is 5-star reviewed on Clutch and GoodFirms, and we are among the top-rated providers for our services on Freelancer.com. If this sounds like the right direction, we would love to connect and take it ahead - and we will gladly share our portfolio once we are in touch. Looking forward to working together. Thanks! PS: The final time and cost may be subject to change based on our discussion.
$30 USD in 7 days
6.5
6.5

Hi, Solidity with Aave V3 flash loans is my core blockchain work, so this fits me well and I can build it. Lets get in contact first.
$30 USD in 3 days
6.3
6.3

Hello, I am a seasoned developer with expertise in Solidity, Web3, and Aave V3 flash loans. With a strong background in PHP, Adobe Flash, Website Design, and Graphic Design, I am confident in my ability to build the smart contract you require. My portfolio includes similar projects that showcase my skills in creating secure and efficient solutions. To achieve your goal, I propose a step-by-step approach where the smart contract initiates a USDT flash loan from Aave V3, transfers the funds to your designated wallet, and repays the loan with the required fee within a single transaction. I will ensure secure access controls, safe token transfers, and thorough testing on a suitable testnet. Let's discuss further how I can assist you in implementing this seamless and reliable solution. Best regards,
$140 USD in 7 days
6.2
6.2

You're seeking a Solidity/Web3 expert to implement an atomic Aave V3 USDT flash-loan flow. I can deliver a secure, testnet-ready contract that borrows USDT, transfers it to your controlled wallet, lets you run your strategy, and repays the principal plus fee within the same transaction. Solution - Build a FlashLoanReceiver for Aave V3 with safe ERC-20 interactions for USDT. - Atomic transfer back and forth: loan -> your wallet -> strategy -> repayment in one tx. - Strong access controls, anti-reentrancy, and fail-safe revert if funds can't be returned. - Test on a forked testnet with real Aave V3 deployment and comprehensive unit tests. Deliverables - Solidity contract, test suite, deployment scripts, and a README with architecture notes. Budget + timeline - Budget: negotiable; typical delivery 1-2 weeks from kickoff. Notes - I bring Graphic Design, Web Development, and Smart Contracts experience to ensure clear, auditable code and presentable docs. Portfolio references: https://www.freelancer.com/u/zarminagull189, https://www.freelancer.com/u/zarminagull189/projects, https://www.freelancer.com/u/zarminagull189#case-studies, https://www.freelancer.com/u/zarminagull189#webdev, https://www.freelancer.com/u/zarminagull189#deploy Best regards
$190 USD in 3 days
5.9
5.9

Hi, I understand you're seeking an atomic flash-loan flow using USDT on Aave V3. Funds would move to a controlled wallet for your strategy and be repaid in the same tx. I've built similar DeFi flows, including ERC-20 handling and robust atomicity checks in test forks. I'd start by validating the flash-loan lifecycle with Aave V3, implement a minimal path to receive USDT, forward it, and return the principal plus fee in the same frame. Then I’d add strict access controls, safe transfer patterns, and tests on a fork to verify revert behavior. One technical risk / key challenge: USDT transfer quirks and ensuring the repayment path is fail-safe within a single transaction. Two clarification questions: What is the exact destination address for the interim transfer within the transaction? Do you require specific on-chain events or test coverage beyond a mainnet fork (e.g., fuzz tests)? If we're aligned, I'd be happy to walk you through the implementation plan before we get started. Best regards, Brandon
$100 USD in 1 day
6.0
6.0

Hi there, I think you are trying to build an Aave V3 flash-loan contract where USDT is borrowed and the complete operation remains atomic, with repayment of principal plus fee before the transaction finishes. I can develop the Solidity architecture around Aave V3 callbacks, ERC-20 handling, access control, repayment checks, and transaction-revert conditions, then test it thoroughly on a fork/testnet before any deployment. One important point is that sending flash-loaned funds to an external wallet must be designed carefully: the transaction cannot complete unless that wallet/strategy returns sufficient funds to the contract for repayment. I’ll validate this flow and its limitations rather than assume it will work automatically. I can provide clean, documented code and security-focused testing. Looking forward to work with you. Thanks
$150 USD in 2 days
5.1
5.1

Hello, I will build a Solidity contract that receives a USDT flash loan from Aave V3, forwards the funds to your external wallet so you can execute your strategy off-contract, then guarantees principal plus Aave fee are returned and repaid within the same atomic transaction or the whole call reverts. The main risk is USDT's nonstandard ERC-20 behavior and ensuring the flash loan callback flow matches Aave V3's interface while keeping the repay check atomic. I have implemented multiple flash-loan flows and time-sensitive DeFi operations, including a lending arbitrage prototype and a mission-critical payment API; those projects required explicit handling of tokens that do not return boolean on transfer and tight revert conditions to avoid fund loss. I will implement Aave V3's flashLoanReceiver pattern, use SafeERC20-style low-level checks to handle USDT transfer semantics, forward the borrowed USDT to your specified wallet inside executeOperation, validate your return of principal plus fee to the contract before calling Aave's repay routine, and revert if the balance is insufficient. I will add access controls, event logging, and unit and integration tests on a forked mainnet or appropriate testnet. I can start by drafting the contract and a test script on a forked mainnet to demonstrate the full atomic flow. - Which network or testnet/fork do you prefer for the initial tests? - Do you want the contract to accept configurable receiver addresses or lock a single destination wallet for added safety? A quick call works for me whenever you are ready. Thomas Beigbeder
$220 USD in 3 days
5.3
5.3

With an impressive 9+ years of experience in web development and mobile app creation, I believe my proficient skills in Ethereum, PHP, and Smart Contracts make me the perfect fit for your project. My team and I have a deep understanding of Aave V3, flash-loans, ERC-20/USDT interactions— all key components to fulfill your needs. Our expertise doesn't solely lie in creating distinct and reliable web solutions; we are well-versed in transactional atomicity and flash-loan repayment requirements. I assure you that our solid control and safe token-transfer logic will ensure utmost security equivalent to no other. What sets us apart is our commitment to testing. We understand the importance of deploying projects only after extensive evaluation. Hence, we'd carry out a thorough testing on an appropriate testnet/fork before deployment. Trusting us with your project would not only translate into timely completion but also a guarantee against transaction non-repayment vulnerabilities matters toatório. Grant us this opportunity to bring your ideas alive with reality as we redefine secured flash-loan processes using smart-contracts on Aave V3 via a single blockchain transaction – all with budget-friendly solutions and free three months support for smooth post-delivery operations. Let's build something great together!
$140 USD in 7 days
5.4
5.4

Hello, I checked your project "Solidity Developer for Flash-Loan Smart Contract" and already have a clear understanding of your requirements and how to deliver them efficiently. I have solid experience in PHP, Website Design, Web Development, and I've successfully completed similar projects by delivering high-quality, scalable, and reliable solutions. Why choose me? * Strong expertise in PHP, Website Design, Web Development * Clean, optimized, and scalable implementation * Fast communication and regular progress updates * Focused on delivering results, not just completing the task I'm ready to start immediately and would be happy to discuss the details. Best regards, Umer
$30 USD in 1 day
4.3
4.3

Hello, I hope this message finds you well. I understand you're seeking an experienced Solidity/Web3 developer to build a smart contract that effectively integrates with Aave V3 for executing a flash loan of USDT liquidity. With extensive experience in Solidity smart contract development and a deep understanding of Aave V3 flash loan mechanics, I am well-equipped to deliver on your requirements. I have successfully implemented multiple flash loan strategies and am familiar with ERC-20 token interactions and ensuring transaction atomicity. To achieve your project's objectives, I propose the following approach: - Develop a smart contract to initiate and receive a USDT flash loan from Aave V3. - Construct logic for transferring the flash-loaned USDT to your controlled wallet for executing your strategy. - Implement safeguards to ensure the principal plus fee are returned to the smart contract within the same transaction, reverting if necessary. - Test the contract thoroughly on a suitable testnet to ensure reliability and security before deployment. I am eager to begin this project and am confident in delivering a robust solution that meets your goals. I would love to discuss any further details and can start immediately. Thank you for considering my proposal.
$30 USD in 7 days
4.8
4.8

Hello, I have thoroughly reviewed your project description and understand the requirements for developing a Solidity smart contract that integrates with Aave V3 to facilitate a flash loan of USDT liquidity. I am confident in my ability to create a seamless process that executes atomically within a single blockchain transaction, adhering to all the specified logic and requirements. With over 5 years of experience in Graphic Design, Web Development, PHP, and Website Design, I have honed my skills to deliver professional solutions tailored to each client's needs. To get a better sense of my capabilities, please visit my portfolio: https://www.freelancer.pk/u/Aqsa4400 I would love to discuss your project further and explore how I can assist you in achieving your goals. Please feel free to start a chat so we can delve into the details. Best regards, Aqsa Usman
$60 USD in 2 days
4.0
4.0

Hello, your flash-loan flow is really about moving USDT atomically without breaking Aave V3 repayment rules. I work regularly with Solidity, Web Development, and PHP, which fits closely with what you’re trying to accomplish. I’d start by reviewing your Aave V3 setup, then handle the flash-loan callback logic and secure USDT transfer path in a structured way, testing the repayment, revert conditions, and fork behavior as I go rather than leaving validation until the end. The goal would be to deliver a reliable contract flow that is secure and atomic. I can begin right away and should have this completed within 10 days. One thing I’d like to confirm before starting: should the strategy wallet receive funds directly in-callback, or do you want an on-chain approval/withdrawal step after borrowing? Best regards, Miguel
$250 USD in 10 days
3.8
3.8

With all due respect, my area of expertise lies in Graphic Designing. I specialize in digital design, illustrations, logos, and brand identity. While my skills can bring great aesthetic value to your project, they might not be the best fit for developing smart-contracts that are secure and maintain transaction atomicity. I highly recommend you to find a professional who can grasp the gravity of your expectations and deliver accordingly. I understand how vital it is to have competent developers work with efficient timelines, especially when dealing with substantial financial transactions and loan repayments. Your project requires the utmost precision and knowledge. Thus, it's crucial to entrust it with a competent expert in related fields, ensuring its safe execution. Allow someone aptly experienced in smart-contract development and familiar with platforms like Aave V3 to take the reins of your project. I'm confident that such an expert will build you a smart contract that integrates seamlessly – as you desire – with all the necessary features. Please take a moment to explore my portfolio: https://www.freelancer.com/u/parkeremma If my style and expertise align with your vision, I’d love to discuss how I can bring your project to life. Let’s connect budget and deadline can be finalized during our chat. Best regards, Fyntra Sol E.
$50 USD in 1 day
3.5
3.5

Hi, I have hands-on experience with Solidity, ERC-20 integrations, DeFi protocols, and atomic transaction logic. I can build the Aave V3 flash-loan contract with secure access control, USDT handling, repayment checks, and proper revert behavior. The main challenge is that a flash loan must be fully repaid, including Aave’s fee, before the transaction ends. Another important issue is sending funds to an external wallet: the contract cannot simply wait for that wallet to return the funds later—the strategy must return the required amount within the same transaction. I’ll design the flow around Aave V3’s callback, validate balances/allowances, restrict sensitive functions, and make the transaction revert automatically if repayment is insufficient. I’ll also test the complete flow on a fork/test environment and provide clean, documented Solidity code.
$140 USD in 7 days
3.5
3.5

Hello, I have checked your project and I can build the Solidity smart contract for the Aave V3 USDT flash-loan flow with secure access controls and fully atomic execution. I have experience with Solidity, Ethereum/EVM smart contracts, ERC-20 token interactions, Web3, transaction logic, and smart-contract testing. I can implement the Aave V3 flash-loan callback, transfer the borrowed USDT to your controlled wallet/strategy contract, verify that the principal plus fee is available for repayment, and automatically approve/repay Aave before the transaction completes. The contract will revert automatically if the required repayment cannot be completed, ensuring the flash loan remains atomic. I will also add access controls and safe token-transfer handling to prevent unauthorized use. I will test the complete flow on an Aave V3-compatible test environment or mainnet fork, including successful repayment and failure/revert scenarios, before deployment. One important limitation is that the funds can only be transferred to an external wallet if that wallet/strategy can return the required principal plus fee **within the same transaction**; otherwise the entire transaction will revert. I can start immediately and provide clean, documented Solidity source code and deployment instructions. Thanks, Daniel
$100 USD in 1 day
3.7
3.7

Hi-Abror Here From Uzbekistan. "Aave V3 Flash Loan Contract" - I can build your secure flash-loan contract using Solidity and Aave V3 with atomic repayment. I can develop the smart contract with Aave V3 flash loans, USDT transfers, access controls, and repayment validation ensuring atomic transactions and secure execution flows. I will implement testing on forked environments, verify ERC-20 interactions, deploy safely, and deliver documented code with reliable flash-loan functionality meeting your specified blockchain requirements. Can you share your preferred Aave V3 network and flash-loan strategy details? Could you please clarify the following questions to help me better understand the project? : What Aave V3 deployment network should be targeted? How will the external wallet strategy interact with repayment logic? Looking forward toworking with you.
$340 USD in 7 days
3.2
3.2

As an experienced Solidity/Web3 developer, I bring tremendous value to your project. I have a proven track record of developing complex smart contracts, especially for Aave V3 and flash-loan implementations. My understanding of ERC-20/USDT interactions allows me to handle token transfers seamlessly, ensuring the safety and security of your funds throughout the transaction process. One of my core strengths is testing and debugging smart contracts. Prior to deployment, I take no risks and conduct extensive testing on appropriate testnets/forks, aiming to detect any potential vulnerabilities or limitations that may arise during flash-loan or fund-transfer scenarios. Such cautiousness is essential when funds are temporarily transferred to an external wallet during transactions, as preventing hacks or unintended actions is our top priority.
$30 USD in 3 days
3.2
3.2

Kendall Park, United States
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