Swapper for the Ethereum network via Uniswap v3

Budget: 7000 UAH Deadline: 5 days

Good day.

I have real experience in developing web3 applications and working with Uniswap v3 (swap logic, working with Router, calculating slippage, gas estimation, error handling, and confirmations).

I am ready to create a simple but reliable swapper for Ethereum with buying/selling tokens for ETH, manual input of the address, fixed amount, taking slippage and gas limits into account, plus logging of transactions and tx hash.

I will do it carefully, with a clear structure and comments, so that the code can be easily maintained further.

Budget: 3333 UAH Deadline: 5 days

Good evening, Biola!
In general, the task is clear, but for an accurate answer regarding the deadlines and price, I would like to clarify some questions that arose after analyzing your task.
Please write in private messages — we will discuss the details and your wishes.

Budget: 3333 UAH Deadline: 14 days

Hello Biola 👋.
I am interested in your project. I have 3 years of experience in commercial development of web3-themed applications, as well as blockchain development. I have the necessary qualifications to complete the assigned task. I am ready to discuss the project and collaboration.

Budget: 10000 UAH Deadline: 7 days

Hello

I am a Web3 developer with practical experience working with **Uniswap v3** and a deep understanding of DEX logic on the **Ethereum** network. I have implemented real projects with swap mechanics, custom slippage handling, gas management, and secure operations with ERC-20 tokens.

### What I can implement for you

I will develop a reliable and clean swap interface through Uniswap v3 with the following functionality:

* Buying tokens for ETH
* Selling tokens for ETH
* Manual input of token address
* Fixed swap amount
* Customizable slippage
* Gas control (max fee / priority fee)
* Logging all transactions + saving tx hash
* Error handling (revert, insufficient liquidity, slippage exceeded)

### Technical approach

* Working directly with Uniswap v3 Router / Quoter
* Calculating minimum amountOut considering slippage
* Preliminary quote before sending the transaction
* Correct handling of approval
* Clean architecture (separation of web3 logic and business logic)
* Documented code
* Protection against common errors during swap

I use ethers.js, work with ABI, understand the mechanics of pool fee tiers, path encoding, exactInputSingle / exactOutputSingle.

### Why me

* Real experience in developing Web3 applications
* Practical experience with Ethereum transactions, gas, mempool
* Understanding of edge cases in DEX (liquidity gaps, MEV, price impact)
* I write readable, maintainable code

I am ready to quickly connect and create a working solution without unnecessary complexity — simple, stable, and secure.

I would be happy to discuss the implementation details and timelines. Expand

Budget: 3333 UAH Deadline: 3 days

Hello! I have reviewed your project and am ready to start working. I guarantee high quality and prompt execution.

Budget: 3333 UAH Deadline: 123 days

Among my recent production systems are: https://step.exchange — a full-fledged DEX exchange, where I developed from scratch the logic for executing swaps, interacting with liquidity, and trading flows; https://web.step.app — wallet transaction flows with a clear user interface, confirmations, and reliable transaction logging; and https://agnthub.ai — contract-based dashboards with monitoring and tracking of audit-level events, which directly corresponds to creating a reliable user interface for Ethereum swaps on Uniswap v3 with manual token input, fixed-size swaps, slippage and gas control, as well as complete logging of transactions with transaction hashes. I look forward to your response, and let’s move forward!

Best regards,
Vyacheslav

Budget: 10000 UAH Deadline: 5 days

Good day
I have worked with Uniswap of all versions, I already have ready-made scripts for different DEXs that I can easily adapt to your needs.
Just clarify in what form you need the swapper - script, bot, web, desktop application.

Budget: 3332 UAH Deadline: 3 days

Hello! I am ready to do it quickly and reliably, I have extensive experience working with DEX and Web3. If you are interested, I am ready to discuss in more detail in private messages.

Budget: 3333 UAH Deadline: 1 day

Good day, I am ready to do it. Write to me in private messages and we will discuss in more detail.....

Budget: 3333 UAH Deadline: 3 days

Hello! We are the Nexus Core team, engaged in the development of web3 applications and the integration of DEX logic on Ethereum, including through Uniswap v3. According to your description, it is about a compact but reliable interface for swapping through Uniswap v3 with buying/selling tokens for ETH, manual input of the token address, a fixed transaction amount, consideration of slippage/gas, and logging operations with tx hash. All of this corresponds to the typical scenarios we work with. I would be happy to discuss the details in private messages and, after clarifications, propose a specific tech stack, work stages, timelines, and a fixed cost.