Blockchain Engineer for our EVM platform

Budget: 15000 USD Deadline: 1 day

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 connect/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: 15000 USD Deadline: 35 days

WE already have an almost ready architecture for an EVM based trading and staking platform, so we can adapt it quickly and discuss the scope here now, i am online ))

for the first stage, i would split the work into smart contract layer, backend indexer and api layer, security review, testnet deployment, and frontend integration support.

we can work with Solidity, Foundry or Hardhat, ethers.js, Node.js or Python services, event indexing, role model, staking logic, trading events, gas optimization, and basic monitoring.

for budget - 15000 USD is realistic for an initial protocol and infrastructure stage if we keep the first version focused on core contracts, backend services, tests, and deployment support.

estimated timeline - 35 days.

public references from our side
- https://business.ingello.com/fractal - complex agent and platform architecture, useful by system design logic
- https://business.ingello.com/platforma - enterprise platform architecture with roles, processes, and integration logic
- https://business.ingello.com/vorfahr - data driven product system with automation and scalable backend thinking

main profile and cases
- https://systems-fl.ingello.com

questions before final estimate
- do you already have protocol documentation and tokenomics, or should we help shape the technical model too
- is the first milestone testnet only, or do you expect mainnet ready contracts with an independent audit pipeline

one small nuance - i would not treat this as only smart contract coding.
it needs architecture, threat modeling, automated tests, deployment process, and careful scalabilty planning, otherwise the cheap part becomes expensive later.
as they say, measure twice, deploy once - almost the same thing, just with more gas fees =)-- Expand

Budget: 15000 USD Deadline: 45 days

Hello!

My name is Alex, and I represent NC-1, a dedicated development group. For over five years, we have been building complex web platforms and backend infrastructures.

I would like to propose our specialist for your EVM ecosystem project on an outstaffing basis — a Full-Stack Developer, Middle (6 years of experience).

🛠️ Technical Stack:
Languages: JavaScript, TypeScript, Python

Backend: Node.js, NestJS, Express, REST, MySQL, MongoDB

Frontend: React, Redux, Material UI, Bootstrap

🎯 About the Developer:
He has over 3 years of extensive experience in the IT industry, with a particular focus on web development, e-commerce, and solution/product creation. As a committed and outcome-driven IT professional, he possesses a passion for programming. He is currently seeking a developer position where he can apply his exceptional coding skills to contribute towards the goals and aspirations of a project while further improving his abilities.

🚀 Direct Value for Your Protocol:
Robust Backend Infrastructure: Ready to build and scale the Node.js/NestJS/Python services that interact with your blockchain networks and trading systems.

Web3 Frontend Integration: Expert in React and TypeScript to seamlessly connect your EVM smart contracts, staking mechanisms, and APIs with the user interface.

System Design: Strong background in data-driven systems, performance, and security practices.

We are fully available for a long-term, remote collaboration. We would be glad to share his detailed CV and GitHub in a private message.

Looking forward to your response!

Best regards,

Alex

NC-1 Development Group Expand

Budget: 15000 USD Deadline: 111 days

Hello!

We are a blockchain development team with strong hands-on experience building Web3 platforms, DeFi infrastructure, and EVM-based ecosystems. We’ve worked on multiple projects involving smart contracts, staking systems, trading mechanics, token ecosystems, and scalable backend architectures for blockchain applications.

Our team has deep expertise with:

* Solidity smart contract development;
* EVM architecture and protocol design;
* Hardhat, Foundry, and Web3 tooling;
* ethers.js / web3.js integrations;
* DeFi protocols, staking systems, and trading infrastructure;
* gas optimization and contract performance;
* backend services using Node.js and Python;
* secure architecture design and smart contract auditing practices.

We pay strong attention to security, scalability, and maintainable architecture, including protection against common vulnerabilities such as reentrancy attacks, overflow issues, improper access control, and oracle-related risks.

We also have experience with:

* Layer 2 ecosystems;
* cross-chain integrations;
* React + TypeScript frontend integrations for Web3 apps;
* high-load backend systems interacting with blockchain networks in real time.

Our team has participated in multiple blockchain and DeFi projects, including work related to IZIGRAM and similar Web3 ecosystems involving tokenized infrastructure, social/trading mechanics, and scalable smart contract integrations.

We are comfortable working in highly technical environments, collaborating closely with frontend teams and product stakeholders, and delivering production-ready blockchain solutions with clean architecture and long-term scalability in mind.

Ready to share relevant GitHub examples, deployed contracts, architecture approaches, and discuss the protocol requirements in more detail.

Looking forward to cooperating Expand

Budget: 14999 USD Deadline: 33 days

Hello, Alfredo!

Your project strongly aligns with my background in high-performance backend systems and complex distributed architectures.

I’m comfortable working across the full stack of Web3 systems — from smart contract development and gas optimization to backend services, trading logic, staking mechanics, and secure frontend integrations using ethers.js and TypeScript. Security, protocol architecture, and long-term maintainability are always priorities in my work.

I also have experience designing clean, extensible systems using DDD, CQRS, and event-driven approaches, which fits well for evolving DeFi ecosystems and trading platforms.

I’d be glad to share GitHub links and relevant project examples privately.

Looking forward to discussing the protocol and technical direction further. Expand

Budget: 15000 USD Deadline: 15 days

Good day.

I take full responsibility for the implementation of your EVM ecosystem turnkey — from architecture to production. I will do everything described in the task: smart contracts, trading infrastructure, staking, backend, integrations with the frontend and API, gas optimization, security, and scalability.

What is included in my work (full scope):

Design and development of all smart contracts of the protocol on EVM (Solidity, Foundry/Hardhat)
Trading systems — contracts, logic, integrations, readiness for real load
Staking — full functionality (stake/unstake, rewards, secure patterns, pausable/roles if needed)
Backend infrastructure — services for blockchain, event indexing, API for applications
Integration with the frontend (React/TypeScript, ethers/viem)
Security — best practices, protection against reentrancy and common vulnerabilities, tests (unit/fuzz), readiness for audit
Gas and performance optimization of contracts and off-chain parts
Deployment, documentation, support of an agreed roadmap with you to a ready working protocol
I work with DeFi, exchange logic, and complex data-driven systems. I can not only write contracts but also design the entire system — on-chain + off-chain, considering L2 and cross-chain integrations if needed.

Portfolio (GitHub, deployed contracts) — in the profile / in private chat after agreeing on details.

I am ready to start immediately, remotely, at a schedule convenient for you. I will complete the task fully within the specified timeframe and budget.

Thank you for considering. Expand

Budget: 15000 USD Deadline: 1 day

Good day, I am writing on behalf of the company Devoxen. We specialize in your task. We have extensive experience in developing Web3 solutions, EVM ecosystems, DeFi platforms, trading infrastructure, and smart contracts on Solidity. We work with Hardhat, Foundry, ethers.js, Node.js, Python, and also pay great attention to contract security, gas optimization, and the architecture of scalable blockchain systems. We understand the workings of staking mechanics, DEX/DeFi logic, backend integrations, cross-chain solutions, and interactions between on-chain and off-chain components.

We can proceed without unnecessary questions and time delays. We also provide a guarantee and support if desired. We can start working on your project immediately after discussing the technical specifications.

I suggest moving to private messages for a more detailed dialogue.

Budget: 15000 USD Deadline: 30 days

I am engaged in backend development and smart contracts, feel free to message me.

Budget: 15000 USD Deadline: 14 days

Hey.

Solidity and EVM (Ethereum, Polygon, BSC, Arbitrum) is a working stack for us. Shipped production contracts for DeFi protocols and staking mechanisms.

Development stack: Foundry for testing and gas optimization, OpenZeppelin libraries as a base with custom modifications where the standard doesn't fit, Hardhat for deployment and integrations. Security checklist through Slither plus manual review against SWC Registry before deployment.

Backend services for blockchain interaction: Node.js or Python with ethers.js/web3.js, event listeners over WebSocket RPC, indexing through The Graph or custom subgraph.

Familiar with common attack vectors (reentrancy, integer overflow, oracle manipulation, flashloan exploits) and apply checks-effects-interactions, ReentrancyGuard, tx.origin vs msg.sender checks.

DM with details: which EVM chain, do you need upgrade patterns (UUPS/Transparent Proxy), existing contracts to integrate with or building from scratch. Expand

Budget: 15000 USD Deadline: 1 day

Hello,

My name is Oleksandr. I’m a highly skilled and experienced Web3 developer with 3+ years of hands-on experience in red teaming, pentesting (state actor like), reverse engineering, 5+ on-chain automation, and 4y business ownership (web3 outsourcing studio "Decentral development" and coworking&coffee decentral.hub)

I have particularly strong expertise within the EVM ecosystem across multiple layers — from smart contract development to running nodes and building custom infrastructure and private Ethereum Core setups tailored for specific задачі.

I bring a strong and unconventional technical background, along with highly developed technical and soft skills. I also have an up-to-date detailed resume focused on Web3, which I can send over today.

I’m confident that my background and experience would make me a perfect fit for your role.

I’d be glad to connect, tell you more about myself, learn more about your project, and brainstorm together on the most effective ways to move forward.

Thank you. Expand

Budget: 15000 USD Deadline: 14 days

Вітаю! 👋

Маю досвід у backend/system architecture, Web3 integrations, high-load API та складних distributed systems. Також працював із EVM ecosystem, blockchain integrations, DeFi-oriented flows та backend-сервісами для взаємодії зі smart contracts.

Релевантний стек:

Solidity
Hardhat / Foundry
ethers.js / web3.js
Node.js / Python
PostgreSQL / Redis
REST API / WebSocket systems
Docker / VPS / Cloud infrastructure

Що можу закрити:

розробка та інтеграція smart contracts;
backend services для взаємодії з EVM chains;
staking/trading infrastructure;
contract interaction layers;
event listeners / indexing;
gas optimization;
security-first architecture;
API integration між protocol/frontend/backend;
deployment та support infrastructure.

Розуміння безпеки:

reentrancy protection;
overflow/underflow;
access control;
signature validation;
multisig/admin separation;
upgradeability patterns;
rate limiting та backend-side validation.

Додатково:

досвід із React/Next.js integration;
WebSocket/realtime systems;
AI/backend systems;
scalable microservice architecture;
Dockerized infrastructure;
CI/CD workflow.

Готовий обгооворити деталі співпраці!

З повагою,
Андрій Expand

Budget: 15000 USD Deadline: 3 days

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