Blockchain Developer for Unified Comms Crypto Integration

Budget: 1499 USD Deadline: 15 days

Hello. I have carefully studied your project and am ready to implement blockchain integration at a professional level. I work with Ethereum, Solidity, and Web3 and can offer a secure and scalable solution. Approach: Development of smart contract (Solidity) for crypto payments and tokens Implementation of ERC-20 token minting and reward system Integration through Web3.js / Ethers.js Security (validation, basic audit, gas optimization) Testing and deployment (testnet → mainnet) What will be done: Payment system through Ethereum / Bitcoin Creation and management of ERC-20 token Access to functions through tokens (access control) Integration with backend Stable and ready solution Technically: Solidity + Web3.js / Ethers.js Secure architecture Scalable code ⏱ Deadline: 10–14 days 💰 Price: 1500 USD Ready to discuss details and propose a technical implementation plan.

Budget: 1500 USD Deadline: 14 days

Hello!

My name is Evgeny, and I have been professionally developing mobile applications, websites, web services, and web applications for 7 years.

*The cost I indicated is for 1 hour of work. To provide a more detailed price, I would like to contact/call and discuss the details.

- You can review my portfolio, feedback, and awards in my profile.

Why should you choose me?
- I have taken 1st and 2nd places in international championships and competitions in the IT field
- I have verified video testimonials and letters of appreciation
- I am always available, honest, and reasonable
- I work under a contract
- I lead my own development team

I would be happy to talk to you in more detail about the project. Expand

Budget: 1500 USD Deadline: 14 days

Will build the ERC-20 token contract in Solidity using OpenZeppelin ERC20 base, deploy to Sepolia testnet first for validation, then Ethereum mainnet, with a Web3.js and ethers.js integration layer connecting token minting and redemption logic to your Unified Comms backend endpoints. Bitcoin payments handled via a payment gateway like BTCPay Server rather than raw node integration, which keeps the attack surface small. Question: is there an existing backend API with auth/user context where the token balance and redemption hooks need to plug in, or is that layer also in scope?

Budget: 1500 USD Deadline: 10 days

Hi Thomas!

I have experience with blockchain integrations, including smart contracts (Solidity), ERC-20 tokens, and Web3-based payment flows.

How I’d approach this:

— implement ERC-20 token contract (minting, basic tokenomics for rewards)
— build secure smart contract logic for distribution (referrals, milestones)
— integrate crypto payments (ETH + BTC via providers like Coinbase Commerce / BitPay)
— connect frontend/backend via Web3.js / ethers.js
— set up redemption logic (tokens → platform features)
— testing (testnets) + secure deployment

Stack:

Solidity, Ethereum (ERC-20), Web3.js / ethers.js, Node.js (backend integration)

Quick questions:
— do you already have a preferred network (Ethereum mainnet / L2)?
— is there an existing backend to integrate with?

Happy to discuss details and propose architecture Expand

Budget: 2500 USD Deadline: 30 days

Greetings!

The Unified Comms project is an ambitious task, and I am ready to implement a blockchain infrastructure that will transform your communication platform into a full-fledged Web3 ecosystem. As the founder of an AI SaaS company, I understand how crucial seamless integration of complex technologies into the user interface is.

My implementation plan:

Payment Gateway: Setting up the acceptance of payments in ETH and BTC. I will ensure secure interaction with the blockchain for real-time transaction confirmations within your workspace.

Tokenomics (ERC-20): Developing and deploying a smart contract for minting your native tokens. We will set up automatic reward triggers for task completion or user acquisition.

Utility Integration: Creating the logic for token exchange for internal resources (storage, access). This will function as a transparent and immutable mechanism within the blockchain.

Security: Writing and auditing smart contracts in Solidity to protect against vulnerabilities and ensure the proper functioning of the rewards system.

Why choose me:

Architectural Approach: I do not just write code; I build logic where the blockchain layer works harmoniously with the AI tools of your platform.

Automation Experience: With expertise in Web3.js, I will be able to set up automatic interaction between your backend and smart contracts without delays.

Focus on SaaS: I understand the specifics of scalable platforms and will lay the groundwork for increasing the number of transactions and users. Expand

Budget: 1500 USD Deadline: 7 days

Hello!
I have experience in development on Solidity and integration of Web3 (ERC-20, crypto payments, smart contracts). I am ready to implement token minting, a rewards system, and payment integration (Ethereum / Bitcoin) with secure deployment.

I can start promptly. I will provide project examples upon request.

Budget: 1500 USD Deadline: 14 days

Hello. I am implementing crypto payment infrastructure (ETH, BTC) and issuing ERC-20 tokens for your platform. I will write smart contracts in Solidity with test coverage for transaction security. I will integrate payments and the rewards system into the Unified Comms backend using Web3.js. I have experience with blockchain architecture (developing a Web3 tracker for the Solana network using WebSockets) and creating complex financial balance accounting systems. What specific actions or user metrics will trigger the allocation of tokens?

Budget: 1500 USD Deadline: 12 days

Hello,

My name is Alexey, and I represent NC-1, a dedicated development group. For over five years, we have been building high-performance websites, mobile applications, ERP/CRM systems, and sophisticated e-commerce products.

I am reaching out to propose our Middle+/Senior Fullstack Developer for your Unified Comms project. Given your focus on integrating AI with blockchain-based payment systems and ERC-20 tokens, our specialist’s background is a perfect match for your technical requirements.

Why our specialist is a great fit for Unified Comms:
Blockchain & Web3 Expertise: Proven experience with Ethereum and Solidity for smart contract development, including token minting and secure crypto-payment integration via Web3.js.

Robust Fullstack Background: Strong command of the PHP (Laravel/Symfony) and React/Next.js stacks. This ensures a seamless integration of blockchain features into your existing AI-powered communication workspace.

Infrastructure & Security: Deep knowledge of Microservices, API development, and Docker, ensuring that the payment infrastructure is scalable, modular, and secure.

Result-Oriented Approach: He has over 3 years of extensive experience in IT, with a particular focus on web development and solution creation. As a committed and outcome-driven professional, he possesses a passion for programming and is ready to apply his exceptional coding skills to contribute towards the goals of your project.

Technical Summary:
Backend: PHP (Laravel, Symfony, Yii2), SQL, LAMP, oAuth, Microservices.

Frontend: React.js/Next.js, Vue.js/Nuxt.js, Tailwind CSS.

Blockchain: Solidity, Ethereum, ERC-20, Web3 integration, Crypto-payments.

We are ready to provide a detailed CV, code samples, and examples of previous blockchain-related projects upon request. I am confident that our developer's expertise will help you successfully deploy the reward system and payment gateways for Unified Comms.

I look forward to discussing how we can contribute to your project’s success.

Best regards,

Alexey
NC-1 Development Group Expand

Budget: 2390 USD Deadline: 29 days

Good day!
My name is Valentin, and I represent Arctic Web Agency. We are a team that specializes in creating modern and effective solutions for business. I can provide examples of our similar work in personal messages. We are ready to take your project to work!

Sincerely,
Arctic Web Team
Freelancehunt

Budget: 1500 USD Deadline: 14 days

Good day, we are ready to implement crypto payments and a token system for your platform with a focus on security and scalability - we have 4 years of experience in IT and have worked with payment system integrations and Web3 solutions in our portfolio - we offer solutions with the development of ERC20 smart contracts on Solidity, integration of crypto payments through Ethereum and Bitcoin, connecting Web3 for interaction with the platform, as well as the logic of using tokens within the system for access to features and bonuses, separately we will include transaction verification and secure payment processing on the backend - we will agree on the details of the architecture, timelines, and costs after reviewing the technical specifications - we work in a team of two, which guarantees a comprehensive approach.

Budget: 1500 USD Deadline: 14 days

Вітаю! 👋

Маю досвід розробки Web3-рішень, інтеграцій із блокчейном та побудови платіжних систем у SaaS-платформах.

Використовуваний стек :

Blockchain:
Ethereum
Solidity (ERC-20 токен)
Smart contracts: token issuance, reward logic, usage
OpenZeppelin (audit-ready contracts)

Backend:
Python (FastAPI) або Node.js (NestJS)
Web3.js / Ethers.js для взаємодії з блокчейном
Обробка платежів (ETH / BTC через gateway)
Логіка балансу користувачів і токенів

Integrations:
Crypto payments (ETH, BTC через провайдерів або direct wallet)
Wallet integration (MetaMask / WalletConnect)
Token usage:
оплата функцій
reward system
premium доступ

Security:
Audit-ready smart contracts
Захист від reentrancy / overflow
Multisig для управління токенами
Rate limiting і backend validation

Infrastructure:
Docker
Cloud/VPS
Node providers (Infura / Alchemy)
Моніторинг транзакцій

Готовий показати підхід до реалізації, приклади архітектури та обговорити токеноміку й безпеку перед стартом.

З повагою,
Андрій Expand

Budget: 1500 USD Deadline: 15 days

I have experience with blockchain integrations and smart contract development.
Ready to get started and discuss details.

Budget: 1500 USD Deadline: 10 days

Hello! 👋
I do not just draw, but I have been DESIGNING websites for over 5 years.

Please take a look at my portfolio and confirm my expertise:
Freelancehunt

Budget: 2200 USD Deadline: 7 days

I see that you need a Blockchain Developer to implement crypto payment features and expand your blockchain token system. The complexity lies in integrating multiple blockchain technologies and developing smart contracts for token minting and secure transactions. My approach includes: 1) Setting up the infrastructure for Ethereum and Bitcoin payments, ensuring that transactions are seamless and secure; 2) Developing an ERC-20 token minting system that allows users to earn and redeem tokens effectively within the Unified Comms platform; 3) Conducting thorough testing of the deployed solution to ensure reliability and security of the smart contracts.

I noticed that the project scope could benefit from clarification on the extent of user interactions with the token system. Specifically, how do you envision users redeeming their tokens, and do you have specific requirements for the rewards system? Additionally, the budget of $1500 seems quite low given the challenges involved in this integration and development. A realistic market value for such a project is about 107,000 UAH, considering the complexities and the requirement for team collaboration.

Let’s discuss this further so I can present a detailed plan that aligns with your goals and expectations.

As you can see in reviews of my profile, I realised similar project

Budget: 1500 USD Deadline: 30 days

Good day! I am very interested in your project. I have extensive experience in launching and supporting crypto projects. My portfolio includes:
Tokenomics & Systems: Developing tokens with referral payout systems and implementing complex multi-level referral architectures.
Web Development: Creating dedicated, high-performance websites for crypto projects.
iGaming & Smart Contracts: Developing slot-style mini-games with integrated payment processing directly through smart contracts.
Trading Tools: Designing custom software for automated market making (AMM).
I am looking for a long-term collaboration and am ready to join your team on a permanent basis. I would be happy to discuss how my experience can contribute to your project's success. I can provide code samples of my smart contracts via direct messages upon request.

Budget: 1500 USD Deadline: 22 days

Hello, Thomas Jack from Malaysia

Can we talk about in PM?

Regards, Paul