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$65 hourly
Vladyslav T.
- 5.0/5
- (3 jobs)
As a Full Stack Web Developer and Blockchain Developer, I possess extensive experience in conceiving, developing, and maintaining innovative applications across both domains. My expertise lies in creating robust, user-friendly web applications while leveraging the latest technologies and frameworks. I specialize in the UTXO model-based Blockchains and Ethereum Virtual Machine chains, with a strong enthusiasm for pioneering protocols such as Bitcoin Ordinals, Runes Protocol, CAT20, and Partially Signed Bitcoin Transactions (PSBT). My proficiency extends to deploying a variety of decentralized finance (DeFi) ventures, including Decentralized Exchanges and Yield Farming platforms. I am skilled in programming languages such as Solidity, JavaScript, and Python, and I have a deep understanding of blockchain platforms including Ethereum, Hyperledger, and Corda. My experience encompasses both front-end and back-end development, utilizing frameworks like React, Angular, and Node.js. In addition, I have a strong background in database management, API development, and cloud computing. I am dedicated to engineering secure, scalable, and efficient blockchain solutions tailored to meet diverse business needs.

Bitcoin
Rust
Golang
Blockchain Development
MongoDB
Supabase
Solidity
web3.js
Laravel
.NET Core
Node.js
Tailwind CSS
Angular
Vue.js
Next.js
$50 hourly
Mykola H.
- 5.0/5
- (2 jobs)
A Senior AI Full Stack Engineer is a highly skilled professional who combines expertise in artificial intelligence, full stack web development, trading bot , automation, and AI chatbot development. This role involves designing, developing, and deploying intelligent systems that leverage cutting-edge AI technologies to enhance user experiences, automate processes, and provide advanced functionalities. Core Responsibilities AI Development and Integration Machine Learning and Deep Learning: Develop and deploy machine learning models (e.g., NLP, computer vision, reinforcement learning) using frameworks like TensorFlow, PyTorch, and scikit-learn. Natural Language Processing (NLP): Implement NLP models for tasks such as sentiment analysis, text generation, and chatbot interactions. Computer Vision: Utilize computer vision models for image and video analysis, object detection, and facial recognition. Full Stack Web Development Frontend Development: Build responsive and interactive user interfaces using modern frameworks like React, Angular, or Vue.js. Backend Development: Develop robust backend services using Node.js, Python (Django/Flask), or Java (Spring Boot) to handle API requests, database operations, and business logic. Database Management: Design and manage databases (e.g., PostgreSQL, MongoDB) to store and retrieve data efficiently. Automation Task Automation: Automate repetitive tasks using scripts, cron jobs, and task schedulers like Celery or Apache Airflow. Workflow Automation: Implement workflow automation to streamline business processes and improve efficiency. CI/CD Pipelines: Set up continuous integration and continuous deployment pipelines to ensure smooth and automated software releases. AI Chatbot Development Chatbot Frameworks: Develop AI-powered chatbots using frameworks like Rasa, Dialogflow, or custom solutions with LLMs (e.g., GPT, Claude). Natural Language Understanding (NLU): Implement NLU models to understand and respond to user queries effectively. Integration: Integrate chatbots with various platforms (e.g., Slack, Discord, web applications) to provide seamless user interactions. Technical Skills Programming Languages: Python, JavaScript (Node.js), Java, C++. AI/ML Frameworks: TensorFlow, PyTorch, scikit-learn, Keras, Hugging Face Transformers. Web Development Frameworks: React, Angular, Vue.js, Django, Flask, Spring Boot. Database Technologies: PostgreSQL, MySQL, MongoDB, Redis. Automation Tools: Celery, Apache Airflow, cron jobs, Puppeteer, Playwright. Chatbot Development: Rasa, Dialogflow, OpenAI API, Claude API. Cloud and DevOps: AWS, Azure, Google Cloud, Docker, Kubernetes, CI/CD pipelines. Soft Skills Problem-Solving: Ability to tackle complex problems and develop innovative solutions. Communication: Strong communication skills to collaborate effectively with cross-functional teams. Project Management: Experience in managing projects, setting timelines, and delivering high-quality results. Continuous Learning: Staying updated with the latest advancements in AI, web development, and automation technologies.

Bitcoin
Bot Development
Solidity
Ethereum
Web3
Next.js
Node.js
Python
Rust
AI Trading
Trading Automation
Solana
$40 hourly
Mykola R.
- 5.0/5
- (2 jobs)
I'm a versatile full-stack developer with 5 years of experience building responsive, scalable web apps using modern technologies like React, Node.js, Express and MongoDB. - Node.js, Express.js, Python, Django, PHP, Laravel, Wordpress, Shopify. - React.js, Next.js, Vue.js, Nuxt.js.. - MongoDB, Firebase, MySQL.. - AI Agent, Grok, OpenAI.. Looking forward to hearing from you. Thank you

Bitcoin
Ethereum
Blockchain
AI App Development
Node.js
TypeScript
JavaScript
Django
Python
PHP
Firebase
MongoDB
Vue.js
React
Web Development
$35 hourly
Oleksandr S.
- 5.0/5
- (1 job)
🚀 Senior Blockchain Developer & AI Automation Specialist | Driving Web3 & AI Innovation As a highly experienced Senior Developer, I offer cutting-edge Blockchain solutions (6+ years) combined with practical AI Implementation & Automation. My expertise lies in building robust, scalable Web3 applications, specializing in Solidity smart contracts, Node.js backend development, MEV strategies, and DeFi protocols. I actively leverage AI to create intelligent automation tools, streamline complex workflows, and boost overall project efficiency through API integration and custom bot development. Whether you need a seasoned Solidity developer for secure smart contracts, a Node.js expert for scalable backends, deep blockchain expertise for complex MEV or DeFi challenges, OR an AI specialist for workflow automation and smart process integration – I deliver high-impact, results-driven solutions. Core Strengths: Blockchain Mastery (6+ Years): MEV & DeFi Specialist: Proven success designing, building, and optimizing MEV bots (AAVE, Compound, Uniswap liquidity pools) – achieved zero missed liquidations & 80% CPU reduction on a major liquidation bot. Experienced DeFi developer, built functional investment tools. Expertise in MEV strategies and arbitrage. Solidity Smart Contract Development: Secure and efficient smart contract development, testing, and deployment (including ERC-20, ERC-721, ERC-1155, and custom logic). Focus on security best practices and gas optimization. Backcend Web3 Development: Comprehensive Web3 solutions, including expert Backend Development (Node.js, Nest.js), multi-currency crypto Wallets, Blockchain Explorers, and seamless dApp integration. Deep Protocol Integration experience (15+ protocols: BTC, ETH/EVM, Solana (SOL), TRX, etc.). Blockchain Infrastructure: Proficient in Blockchain Node Setup & Maintenance (Geth, Parity), implementing Chainlink Oracles, containerization with Docker, and setting up CI/CD pipelines. AI & Automation Expertise: AI-Powered Automation: Building custom AI agents, automation scripts, and bots (incl. Telegram bots) to streamline workflows, automate repetitive tasks, and improve operational efficiency. Developing custom AI solutions. Seamless AI Integration: Skilled in connecting applications to various AI APIs (e.g., OpenAI API, other AI models) and third-party services to unlock intelligent features and data-driven insights. Practical AI Application: Focused on leveraging AI tools pragmatically to solve real business challenges and create tangible value. Why Partner With Me? ✅ Dual Expertise: A unique blend of deep blockchain development foundation and practical AI automation & integration skills. ✅ Proven Problem Solver: Excel at tackling complex technical challenges in both Web3 and AI automation, demonstrated by a diverse project portfolio. ✅ Results-Oriented: Focused on delivering secure, efficient, high-performance blockchain solutions and effective automation tools. ✅ Reliable & Communicative: Experienced collaborator (B2 English), committed to deadlines and clear, proactive communication. Ready to discuss how expert blockchain development and intelligent AI automation can elevate your project? Let’s connect! Client Feedback & Testimonials: (Testimonials remain unchanged but serve as strong social proof) Miles Austin CEO at Hyphen Global AG “Alex is an outstanding specialist in blockchain development. At Hyphen, he distinguished himself as an innovative developer, particularly in working with Chainlink oracles and creating smart contracts. His flexible approach to development and ability to quickly adapt to new technologies played a key role in moving our projects forward. Alex is not only technically proficient but also possesses strategic vision, making him an invaluable asset to any team.” Thierry Gilgen Founder & CEO at EveryFin “Working with Alex was an absolute pleasure. As Tech Lead for our Blockchain development team, he consistently impressed me with his outstanding technical knowledge and unwavering dedication to the success of our project. His ability to communicate complex ideas in a clear and concise manner was invaluable, and he was always willing to go the extra mile to ensure our team was successful.” “Beyond his technical expertise, Alex is an incredibly motivated and resilient individual who never shied away from a challenge. His positive attitude and willingness to take on new responsibilities made him an invaluable member of our team. I have no doubt that he will continue to achieve great things in his future endeavors and I would highly recommend him to any organization looking for a talented and dedicated developer.”

Bitcoin
Lean Startup
Systems Engineering
Web Development
AI Development
AI Chatbot
Machine Learning
AI Bot
TypeScript
Ethereum
Blockchain Development
Solidity
Smart Contract
web3.js
JavaScript
$35 hourly
Viacheslav I.
- 5.0/5
- (3 jobs)
We architect the future of Web3 – combining blockchain precision with AI agent power to launch next-gen decentralized products. We specialize in Web3 innovation – delivering high-performance blockchain solutions powered by custom AI agent automation. From NFT platforms to DeFi ecosystems and Telegram-based dApps, our mission is to scale your Web3 vision. With 140+ Web3 projects completed, $1B+ in project capitalization, and 15M+ global Web3 users, we’ve built AI-driven DeFi bots, secure NFT marketplaces, and scalable Telegram-integrated dApps – all operating on top-tier blockchain networks. 💡 What We Deliver AI Agent Automation: Trading bots with real-time market reactions for DeFi platforms AI governance agents for DAO proposal handling and voting optimization Risk assessment bots for lending/borrowing systems Anti-sybil and KYC agents powered by on-chain/off-chain data Community sentiment agents trained on social and transactional signals Portfolio rebalancers for dynamic DeFi strategy execution Predictive utility agents to forecast token use and ecosystem behavior Moderation agents for Web3-native social platforms Auto-proposal agents for DAOs based on treasury and governance analytics Smart alert agents for real-time wallet and protocol events Web3 Solutions: Cross-chain NFT marketplaces with staking and trading Telegram dApps for airdrops, wallet linking, and real-time engagement AI-powered DeFi yield optimizers with customizable tokenomics Launchpad systems with KYC, whitelist, and token claim flows Modular DAO builders with treasury control and governance logic Token-gated platforms for content and experience access NFT-based gamified reward and loyalty systems Multi-chain explorers with AI-enhanced insights In-app token swaps with slippage and liquidity analytics Scalable infrastructure to support 300K+ TPS in Web3 products 🔧 Tech Stack Blockchains: Ethereum, Solana, BSC, Polygon, TON Smart Contracts: Solidity, Rust, Move Backend: Node.js, Nest.js, Express.js Frontend: React, Next.js, Vue.js Infrastructure: AWS, Firebase, IPFS 🌐 Why Choose Us? 50+ AI agent solutions deployed in DeFi, NFT, and Web3 automation 50+ Telegram-based dApps delivered to Web3-native communities Experience across 42+ blockchain networks $20M+ daily DeFi volume and $300M+ liquidity processed Infrastructure built to support high-load dApps with 300,000+ TPS Web3, blockchain – our space. Let’s build your next-gen Web3 product – whether it’s a DeFi protocol, NFT marketplace, Telegram-based dApp, or AI-driven automation. We bring it to life. 💡 Let’s scale your project with the power of blockchain, AI agents, NFTs, DeFi, and full-stack Web3. P.S. Need custom AI agent bots, next-level Telegram integration, or a unique blockchain solution? Let’s talk. 𝐋𝐞𝐭’𝐬 𝐛𝐮𝐢𝐥𝐝 𝐀𝐈-𝐝𝐫𝐢𝐯𝐞𝐧 𝐖𝐞𝐛𝟑 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐭𝐨𝐠𝐞𝐭𝐡𝐞𝐫 – 𝐦𝐞𝐬𝐬𝐚𝐠𝐞 𝐮𝐬 𝐧𝐨𝐰

Bitcoin
web3.js
Solidify
Blockchain Development
OpenAI API
Web Development
Smart Contract
Web3
Solana
Ethereum
DApp Development
Solidity
AI Development
AI Agent Development
Mobile App Development
$35 hourly
Denys Z.
- 5.0/5
- (8 jobs)
✌️ You will get satisfied result in right time. I always try to make perfect one that client wanna make. I'm seasoned and dedicated Rust and Python developer and have vast experience with React, Angular, Wordpress and GoHighLevel. Familiar with web3, smart contract development. Implement your idea to perfect real one is my duty and mission

Bitcoin
Docker
Amazon Web Services
D3.js
Data Analytics
Desktop Application
SaaS Development
React
web3.js
Ethereum
Solana
Solidity
TypeScript
Rust
Bot Development
$100 hourly
Denys Z.
- 5.0/5
- (21 jobs)
Over 15 years of practical experience in the development and architecture of enterprise systems for web, mobile and desktop. As a senior backend software developer created a lot of reliable, bug-free, well-documented RESTful APIs, heavy background jobs, web services, etc. Guru in JAVA, strong experience in .NET, ASP.NET, and experience in web development. In the past 10 years, I designed, architectured, and delivered a lot of heavy-loaded, reliable systems and services. The main domains where I was involved are: Accounting(Double-entry bookkeeping, reconciliations, chargebacks) Billing(Clients invoicing) Payments(Integration with various PSPs: PayPal, Payoneer, Transfast, WellFargo, Skrill, Adyen(visa, mc, amex), etc. ) Compliance(Users identity and data verification) Authorization and authentication(oAuth2) Me and my team successfully finished legacy migrations\modernization projects, such as: Migrated desktop app to Web Migrated\modrinzed from legacy Perl monolit to java microservice architecture: user-payments related logic Accounting related logic Invoicing related logic Compliance related log Migrated to newer vendors APIs, file-based - SOAP - REST I understand how the blockchain cryptocurrencies work and have an experience to process payments from BTC, ETH, LTC, Tether, XMR I'm familiar with AWS infrastructure and can set up enterprise-level systems on it. I take full responsibility for the architecture and quality of the logic that is delivered by me and my team. In the future, I see myself as a product architect and an engineering lead in a successful product company.

Bitcoin
AWS Application
OAuth
PostgreSQL Programming
Payment Gateway Integration
Spring Framework
Hibernate
Docker
$70 hourly
Sergey R.
- 5.0/5
- (24 jobs)
Why should you hire me instead of cheaper alternatives? Because you get what you pay for. Who am I? I am a software developer, team lead, and project manager with over 25 years in the industry. My strong sides are: problem-solving, optimization, reverse-engineering skills, focus on client needs, attention to quality and economics of the decisions, deep understanding of computer systems and software architecture. I worked on various projects for different industries like marine transportation, web application for computer-aided learning, mobile applications; security: iClass, RFID, reverse-engineering.

Bitcoin
Project Management
Database Programming
Performance Optimization
Scrum
Software Architecture & Design
Web Development
Python
PHP
AngularJS
$35 hourly
Alex M.
- 5.0/5
- (4 jobs)
Greetings 👋 Below you can see a short overview of the services that I, as a developer, provide, and the experience I've gained while working in the field of web3 application development ⬇️ 🕸️ "Classic" programming I have a big experience in Python development, more than 5 years. During my work on a freelance, I managed to accumulate a base of regular customers and a lot of positive feedback on various freelance platforms. Because, first of all, I offer my customers quality and responsibility, which, unfortunately, is rare in this sphere.😩 ( I've been working some time in a big IT company, but I came to understand that variety of tasks and direct work with bussines is very important for me + I changed the direction of my activity towards Blockchain development ) - Linux VPS\VDS - Selenium \ Scrapy, bs4 - Django \ Flask - SQL \ noSQL - Telebot \ telethon - Neural learning 🔗"Decentralized" programming I started to get interested in and activly developing myself in the field of decentralized applications development back in 2019. Initially, my job was only to develop smart contracts for the ethereum network (solidity). Over time, plunging more and more into various interesting projects, I gained the experience i needed and understanding on a good level most of the top web3 technologies. - Cryptography (sha256, rsa, elliptic curves, zk-snark) - Blocchain (erc, trc, btc, sol) - NFT, DAO, DEX, DeFi, GameFi - erc20, erc721, erc721a, erc1155 ... OpenZeppelin - solidity, rust 👨‍💻 Current vision of our cooperation Now I am fully immersed in the development of the "new Internet" and I'm standing at the forefront of creating new technologies. Because this sphere is developing rapidly, I'm not able to know and have an experience in every branch , but because of knowledge in cryptography and extensive experience in classical programming, it won't be difficult for me to figure it out quickly. I've never failed any project that i took and i never take projects in which I'm not sure I'll succeed. In the working process, I always try to find the most suitable solution for each task. If it's necessary, I can explain in simple terms any technical nuance that appeared in the work. I often work with my team on big projects. These are top-level specialists in their fields of activity, for whom I fully vouch and take full responsibility! Tell me your idea and I'll tell you how to implement it better and implement it! I'm interested in a long-term cooperation and 'I'm down' for partnership on adequate terms. Also you may have an opportuniy to join my project as a partner or investor, let's discuss options for cooperation. P.s. Not all works can be added to the portfolio because of NDA. ⏱Last updated: April 2, 2022

Bitcoin
Solana
Ethereum
NFT
Solidity
Blockchain
Rust
$25 hourly
Albert T.
- 5.0/5
- (14 jobs)
Thank you for visiting my profile. I would like to introduce myself as a committed quick learner who strives for excellence. My name is Albert, born, raised and still living in Ukraine. I do manual translations that sound natural and I guarantee profound research ensuring every word in my translation is in the proper context. I respond within 24 hours (usually within a few hours) and have no issues working through time zones. I'm reliable, punctual and flexible when it comes to executing contracts for my clients. I'm open to short-term and long-term cooperations. You've found the right freelancer if you are looking for services such as: - Translating from English/Ukrainian/Russian to Romanian - Translating from English/Ukrainian/Romanian to Russian - Translating from English/Russian/Romanian to Ukrainian (Documents, Manuals, Articles, Websites, etc.) - Translating and adding subtitles - Proofreading - Localisation (Apps, Websites, etc.) Feel free to contact me.

Bitcoin
English to Ukrainian Translation
Audio Transcription
Cryptocurrency
Website Translation
Caption
Translation
Blockchain, NFT & Cryptocurrency
Ethereum
Typing
Subtitles
English to Romanian Translation
Content Localization
English to Russian Translation
Ukrainian
Proofreading
Russian
English
$60 hourly
Vadym P.
- 0.0/5
- (0 jobs)
Empowering Innovation Through Expertise in Backend Development, Blockchain, and DevOps With over 10 years of hands-on experience, I specialize in building cutting-edge digital solutions that drive innovation and deliver business impact. From blockchain ecosystems to complex backend systems and scalable infrastructures, I excel in creating high-performing, reliable, and secure applications. I thrive on solving complex problems, finding creative solutions, and delivering exceptional results. ✔️ Key Expertise - Backend & Programming: JavaScript (ReactJS, NodeJS), Golang, Rust, C++, Dart, Solidity, Erlang - Blockchain Development: Smart Contracts (ERC-20, ERC-721, ERC-1155), DeFi, NFT, DEX, CEX, and bot development (arbitrage, flash loans, front-running) - DevOps & Infrastructure: AWS, Docker, Kubernetes, Terraform, Ansible, CI/CD pipelines - Databases: PostgreSQL, MongoDB, MySQL, LevelDB, RocksDB ✔️ Why Work With Me I deliver reliable and efficient applications tailored to your needs. My focus on quality, attention to detail, and passion for solving complex problems ensure your project is in capable hands.

Bitcoin
web3.js
Blockchain
DevOps
Ethereum
Solidity
Blockchain, NFT & Cryptocurrency
Smart Contract
Blockchain Development
Web3
Blockchain Architecture
Golang
Node.js
React
JavaScript
$50 hourly
Vitalii Y.
- 5.0/5
- (0 jobs)
I am a highly skilled Blockchain Developer with a strong technical background and extensive experience in this blockchain industry. With years of hands-on expertise in both frontend, backend and blockchain development, I am well-versed in creating innovative, secure, and scalable solutions tailored to meet your business needs. 💎My Expertise - Solana Meme Coin, Pump Fun - Tron Meme Coin, SumPump, SunSwap - Dex like Pancakeswap, Uniswap - Bitcoin Layer 1 Dex - Liquid staking Dapp - Staking, Farm & Pool - Lending & Borrowing Dapp - ICO - Token and Tokenomics - NFT minting, NFT marketplace - Token Launchpad - Cross-Chain Bridge using Layerzero, Hyperlane and Wormhole - Web application development(React.js, Next.js, Node.js etc) 💎 Why I Choose Me - Excellent communication with quick response times - Always adhere to hte agreed budget and timeline - Available to work within your time zone for smoother collaboration - Provide daily project updated to keep you informed of progress - Offer 3 months of free post-launch support to ensure your project continues to run smoothly Looking for a trading expert, fintech business strategist, or mentor to scal your business or enhance your trading skills? Let's connect!

Bitcoin
Mobile App
Artificial Intelligence
Bot Development
Ethereum
Web3
Rust
Solidity
NFT
Blockchain Architecture
$29 hourly
Dmytro H.
- 5.0/5
- (1 job)
𝐃𝐦𝐲𝐭𝐫𝐨 | 𝐁𝐥𝐨𝐜𝐤𝐜𝐡𝐚𝐢𝐧 𝐄𝐱𝐩𝐞𝐫𝐭 | 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐢𝐧𝐠 𝐈𝐧𝐧𝐨𝐯𝐚𝐭𝐢𝐯𝐞 𝐂𝐨𝐝𝐞 𝐟𝐨𝐫 𝐃𝐞𝐦𝐚𝐧𝐝𝐢𝐧𝐠 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 With over 6 years of experience in blockchain development, I specialize in building cutting-edge decentralized solutions that push the boundaries of innovation. From tokenization to decentralized finance (DeFi), I craft secure and scalable blockchain applications tailored to your business needs. As a skilled developer and Upwork freelancer, I’ve worked on multiple blockchain projects, building solutions across various ecosystems such as Ethereum, Solana, and Binance Smart Chain. Whether you’re looking to build a robust DeFi platform or integrate blockchain into your existing infrastructure, I have the expertise to bring your project to life. 𝐖𝐡𝐲 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞? • Blockchain Expertise Across Multiple Platforms: I am proficient in Ethereum (Solidity, ERC standards), Solana (Rust, Anchor), and Binance Smart Chain, providing tailored solutions for each ecosystem. Whether it's DeFi, NFTs, or smart contract development, I have the technical knowledge to deliver high-quality work. • Full-Stack Blockchain Development: From front-end integrations using Web3.js or Ethers.js to back-end blockchain architecture and smart contract design, I can handle your project from start to finish, ensuring seamless execution and performance. • Security & Scalability: I prioritize security in all my blockchain projects, using best practices to ensure that your dApp or blockchain solution is secure and scalable for future growth. • Proven Track Record: I’ve successfully helped clients launch secure blockchain applications, contributing to their business growth and adoption. My experience spans from launching token presales to building complete decentralized applications. 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐒𝐤𝐢𝐥𝐥𝐬 & 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞𝐬 Blockchain & Smart Contract Development Ethereum Ecosystem: Solidity, Vyper, ERC20/ERC721/ERC1155 standards Solana Development: Rust, Anchor Framework Binance Smart Chain (BSC): Smart contract development with Solidity NFTs & DeFi Protocols: Tokenization, liquidity pools, staking, lending, farming Full-Stack Blockchain Development Frontend: React, Next.js, Web3.js, Ethers.js, Solana Web3.js, TailwindCSS Backend: Node.js, Python, Go, Rust, Express.js, Flask Blockchain Libraries: Web3.js, Ethers.js, Solana Web3.js APIs: GraphQL, RESTful APIs Mobile Development Mobile Platforms: React Native, Kotlin (Android), Swift (iOS) Databases & Storage Solutions Databases: PostgreSQL, MySQL, MongoDB, IPFS 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝐈'𝐯𝐞 𝐒𝐞𝐫𝐯𝐞𝐝 From decentralized finance (DeFi) applications and non-fungible tokens (NFTs) to enterprise-level blockchain solutions, I have the expertise to deliver high-performance systems for a variety of industries. 𝐋𝐞𝐭'𝐬 𝐖𝐨𝐫𝐤 𝐓𝐨𝐠𝐞𝐭𝐡𝐞𝐫 If you're ready to turn your blockchain ideas into reality, let’s connect. I can provide the technical solutions you need, helping your project thrive in today’s dynamic and fast-paced blockchain landscape.

Bitcoin
Ethereum
CI/CD
UI/UX Prototyping
AI Trading
AI Chatbot
Solana
Crypto Wallet
Token Standard
Tokenomics
Front-End Development
Python
Smart Contract Development
Integral Calculus
Blockchain Architecture
$35 hourly
Andrii S.
- 0.0/5
- (0 jobs)
Professional Summary Senior Full Stack Web Engineer with 13 years of experience in commercial web development. Skilled in backend development, blockchain integrations, and team leadership. Experienced in delivering scalable and efficient solutions for industries such as cryptocurrency, e-commerce, and ERP systems. Have strong analytical skills and a practical approach to problem-solving. Tools • Programming Languages: JavaScript, TypeScript, Node.js, Python, PHP • Frameworks: Express, Koa, NestJS, Laravel, Flask, Django, Angular • Databases: MySQL, MongoDB, PostgreSQL, Redis • Blockchain Technologies: Ethereum, Tron, Polkadot, Ripple, Bitcoin • Version Control and DevOps: Git, Nginx, Docker, Docker Compose, AWS (KMS, Parameter Store, S3, EC2, Lambda)

Bitcoin
Ecommerce
TRON
Ethers.js
Angular
Python
MongoDB
PostgreSQL
NestJS
TypeScript
Node.js
International Development
Web Development
Product Development
Ecommerce Website
$30 hourly
Valentina T.
- 5.0/5
- (30 jobs)
Marketing specialist with 6 years of experience in advertising and brand strategy. Currently focused on Custom ChatGPT Expert Automation and AI Search Optimization — helping businesses stay visible and relevant in the age of AI-driven discovery. In addition, I have:  - master's degree in information technology - knowledge of the best practices in AI - expert level in tools that help analyze competitors websites in detail ( semrush.com, Serpstat, Similarweb) - high level of feedback on Upwork

Bitcoin
Administrative Support
Data Entry
Project Management
Blockchain
Project Plans
Branding
Cryptocurrency
Market Analysis
$40 hourly
Roman V.
- 0.0/5
- (2 jobs)
Hello, my name is Roman. I am a cryptocurrency developer with 6 years of experience. I've worked extensively with Solidity (across all its versions, and I'm proficient with Ethereum assembly and low-level call operations), Node.js, MongoDB, PostgreSQL, and Go (specifically forking and customizing the consensus engine). My skills extend to GraphQL, React, and I'm well-versed with libraries like ethers.js, web3, tailwindcss, and the uniswap-sdk (relevant to both uni v2 and uni v3). I've developed various DeFi projects, including farming platforms, decentralized exchanges (DEXs), NFT initiatives, tokens with burning mechanisms, and other sophisticated structures that can be crafted with Solidity. Additionally, I have experience working with the Telegram API, specifically with the bot functionalities. I can also develop Electron applications tailored for various platforms.

Bitcoin
Uniswap
Solidity
Telegram API
BitShares
Blockchain
ExpressJS
Flask
Python
C#
JavaScript
$28 hourly
Konstantin K.
- 5.0/5
- (8 jobs)
I'm a 6+ year experienced PPC specialist. AdWords and Bing PPC I'm Google certified partner, have worked with many branches of businesses and have managed and set up dozens of pay per click campaigns (SEM) with AdWords and Bing. I can help you in research of unique strategy, perfect audience, the most effective keywords to use, these things will bring your online business to the new level. Having a nice experience in Initial Coin Offering (ICO) projects (Token Sale, Crow Sale/Fund), from Autumn 2017 till February 2018 completed around 15 projects in this field. Also can work with other crypto related projects, like crypto exchange platforms, mining hardware e-commerces, etc. Area of expertise: 1. Campaign building 2. Campaign optimization 3. Remarketing 4. Display Network 5. Shopping ads and feeds (Google Merchants) 6. Video Ads 7. Apps ads 8. ROI/Conversions rate/Transactions optimization 9. Google Analytics Facebook Ads Recently started to learn FaceBook ads and already had some success in this field with some clients from Ukraine. And I'm happy to help you with FB as well. Due to a variety of my experience, I could be useful for you and provide with suggestions on services that I offer. Also, my knowledge will help you to find an awesome strategy for your business to apply and that will convert your incoming traffic into sales/requests. I'm opened to any conversation and discussion, everything is made for best service of my clients. Let's help each other!

Bitcoin
Conversion Rate Optimization
Blockchain
Internet Marketing
Digital Marketing
Pay Per Click Advertising
Search Engine Marketing
Search Engine Optimization
Google Analytics
Google Ads
$70 hourly
Petr L.
- 3.8/5
- (1 job)
Decentralized technologies rapidly expand and raise great hopes. I research, develop and deploy with enthusiasm Web 3.0 projects, peer-to-peer networks, blockchains, and DAGs since 2017. During 4 year in this emerging field, I became a technical expert with a strong understanding of the business goals of my clients. I have experience building solutions upon existing blockchains and developing decentralized platforms from scratch. One of my greatest accomplishments is EVEN blockchain platform. I led the development of the core of the platform, implemented modules, macro/micro-service architecture, CLI module interaction with services. As a backend developer with 10+ years of experience, I help my clients to choose the technology stack and architecture of their projects. Let's have a chat here on Upwork and discuss how to start your project with the minimum efforts and develop it to the position of the market leader.

Bitcoin
Ethereum
Database Design
Smart Contract
Business with 1-9 Employees
Software Architecture & Design
Software Design
Golang
Cryptography
Cryptocurrency
Blockchain
$63 hourly
Roman L.
- 4.9/5
- (2 jobs)
Hi! This is Roman Loboda who is senior Web & Blockchain developer. As a web developer, I have developed various web site and web app. Specially react/node, react/python, react/php are my strongest fields. So I have expertise experiences on React.js/HTML/CSS/Javascript/PHP/Node.js/Python etc. And as a blockchain developer, I did developed and worked in various blockchain project and cryptocurrency trading. I have working experiences on ICO project(smart contract development/Solidity). Plus, have developed trading bot and stratigies. And worked crypto currency market data visualization(d3.js, various chart js) The objective is to provide quality and productive work to the buyers at Upwork to build great long term working relations. I look forward to working with you in the near future. Thanks in advance for your time and attention.

Bitcoin
Ethereum
Trade Marketing
Blockchain
Python
PHP
D3.js
JavaScript
Node.js
$25 hourly
Alexander P.
- 5.0/5
- (5 jobs)
Hi! I am a frontend and backend developer with 5 years of experience. — I will create a website of any complexity. — I integrate on CMS - WordPress. — Adept WordPress and React/Redux — I create and develop cryptotokens, smart contracts — I develop crypto exchangers — I am developing a full-fledged decentralized application (DApp) in JS using the Web3 library and the MetaMask plugin — I create a token and help it be listed on crypto exchanges In my work I rely on modern standards and the latest technologies. I can: — Layout - mobile first, using BEM, SCSS — JS / ES 2023 — React, Redux — WordPress — Gulp, WebPack — GitHub — Web3 — Ethers.js — Web3.js — Blockchain Confirmation of qualification: Certificate of Johns Hopkins University and certificates of CyberBionic Systematics. More information in the "Education" section.

Bitcoin
Crypto Wallet
Crypto Exchange Platform
Blockchain, NFT & Cryptocurrency
Web3
Cryptocurrency
Landing Page
BEM
WordPress Development
WordPress
JavaScript
SCSS
HTML5
React
Git
$80 hourly
Victor S.
- 0.0/5
- (0 jobs)
Thnaks for your visit my profile. As Senio blockchain developer, I have 2+ blockchain developing experience for smart contract development and Dapp, website for token, trading bot using python and AI. Main skill: *solidity *smart contract development *token creation and ICO experience *trading bot development *react js and node js *web3.js if you have any idea, please contact me. You will get good result from me. thanks.

Bitcoin
Blockchain Development
Blockchain
Node.js
Solidity
Smart Contract
React
$45 hourly
Nikola I.
- 0.0/5
- (0 jobs)
As a senior full-stack and Blockchain developer, 7 years of development and project management experience, with the last 5 years of expertise in Blockchain architecture, Cryptocurrency Wallet Development, Smart Contract, Crypto Coins Exchange Development. Looking for long-term opportunities that appreciate high-quality standards with quality and maintenance code. SERVICE : - Blockchain(BitCoin | Ethereum | Binance Smart Chain(BSC) | Polygon | Fantom | TRON) o Decentralized Finance(Defi) o NFT marketplace o Development and Audit Smart Contract o DEX Development - Full-stack development o Web based system development(PHP, Laravel, NodeJS...)

Bitcoin
Ethereum
Cryptocurrency
Cryptography
Truffle
React
Binance Coin
Chatbot
Smart Contract
Remix
Blockchain
Solidity
Blockchain Development
Vue.js
$35 hourly
Lisenko F.
- 0.0/5
- (0 jobs)
Solutions I Provide: ✔ DEX and Centralized Crypto Exchange ✔ Advanced Trading Platform (Stocks, CFD, Forex, Option, Features...) ✔ Portfolio Tracking Platform ✔ Multichain Web and Mobile Wallet ✔ Crypto Betting and Casino ✔ Yield Farming Protocols ✔ Liquidity Mining Protocols ✔ Automated Market Making (AMM) protocols ✔ Flash Loans ✔ Impermanent loss, governance tokens ✔ P2P/Pool Lending and Borrowing ✔ Crypto Collectible Platforms and Non-Fungible Tokens ✔ Custom dApps ✔ ERC20, ERC777, ERC223, ERC721, ERC1155 Smart Contract Development ✔ Forsage, Linos Share, BestMining like MLM Crowdfunding HYIP Platforms ✔ ICO, STO, Blockchain Copyrighting and Whitepapers ✔ Token Design - Stabilcoins, Utility, Security, Investment, Dividend coins Excited to join any interesting projects !

Bitcoin
Blockchain Development
Binance Coin
Ethereum
Solidity
DApps
Smart Contract
web3.js
Node.js
React
$100 hourly
Arthur R.
- 0.0/5
- (0 jobs)
I’m a full-stack developer, who is passionate about Back-End, API development. I have experienced with Python, Node.js, PHP, Java ... and System Administration (especially AWS, GCP). And I am smart contract expert, with deep knowledge in blockchain and various cryptocurrencies. I'm skilled in building modern websites and SEO and web3,Uniswap and other APIs. I'm well-talented in Elastic search and Apache Solr. I am sure I am the most proper developer you are looking for. I graduated Tokyo university in 2017. Experience: I have 5 years of experience in full stack development. Previously, I took part in the super-scale HMS (Hospital Management System) project, and I played the role of full-stack developer of the EMR (Electronic Medical Record) system. The whole system was planned to be implemented with Java Spring backend and React frontend. I was mainly responsible for backend development, where we used MongoDB for our main database and partly used MySQL. It was a huge system that had to include many subsystems such as FrontPage, Discharge Summary, Admission Records, Physician's Notes, Surgery/ Procedure Records, Nursing Notes, Laboratory Test Records, Imaging Reports, Pathology Reports, Medication Prescription, and Billing Information systems. With the collaboration of the medical team, my team successfully launched the 1-year long HMS project, while I built up precious experience and knowledge on the Spring ecosystem.

Bitcoin
Python
Smart Contract
web3.js
Node.js
MongoDB
Ethereum
React
Vue.js
Blockchain
$100 hourly
Alexander K.
- 0.0/5
- (0 jobs)
I always welcome entrepreneurs & innovators to partner up with my highly experienced skills&stacks to implement your ideas into reality. Whether you need a website, coin or apps developed or even Digital Marketing campaigns executed, I am at your disposal. My best practices include considering all options available towards getting your idea live. I leave no stone unturned to deliver nothing less than the best! My Services: - Web2: React.js, Angular, Vue.js, Ember.js, Meteor.jsJavascript, Python, Ruby, Html, CSS, PHP, SQL, NoSql CouchDb, Node.js, Express.js, Django, Flask, RubyOnRails, Next.js, Nuxt.js, Nest.js, Laravel, Magento, Wordpress, Drupal, TypeScript, Coffee Script - Web3: Web3.js, Ethers.js, Web3.py - Blockchain: Bitcoin, Ethereum, Geth, MEV-Geth, FlashBots, Arbitrage/Liquidation Bots, Parity, Ethereum 2.0, Polkadot, Truffle, Waffle, Solidity, ERC(BEP)20/721/1155, Stable Coin, Binance, UniSwap(SushiSwap), Staking Pool, Mining Pool, Dapp Contact me regarding any project you're serious about. Please maintain a professional conduct.

Bitcoin
Video Stream
Digital Media Player
React Native
Blockchain Development
Ethereum
Blockchain
Solidity
Reverse Engineering
Linux
C
React
Node.js
Web Application
C++
$100 hourly
Alexander K.
- 0.0/5
- (0 jobs)
I'm developing blockchain solutions since 2017. Including the crypto exchanges (P2P and CEX), blockchain forks, tokens creation (ERC-20, ERC-721 NFT), smart contracts, DeFi and Ethereum mass payment tools with low gas consumption. The other chains experience includes: Bitcoin, Polymesh, Chainlink, and Hyperledger. In the past I've been managing software development projects for the world-class companies like Opera Software and Status.im. I help my client to bring their ideas to production by creating a highly performing IT teams that deliver. I have hands-on experience with Python, Django, AWS, R, Hadoop, SQL, Bash, PostgreSQL, MySQL, MS SQL. I'm in IT since the 1990x. MBA degree since 2010. I'm well versed in Blockchain technologies and particularly Ethereum. I lead a top rated team - the Beemster Team - which is ready to deliver a software solution for your product or idea from the discovery and proof of concept to the production and maintenance. Stay safe - hire reliable people that deliver, do not disappear, and do not cheat. Please check my LinkedIn (Viacheslav Shybaiev) profile for extra recommendations. I am open to opportunities that can make the world a better place - and I'd be glad to know the details about your project or idea. Please make sure to checkout my video introduction using the link below this text. You can also find Beemster Team channel on YouTube and see our team live.

Bitcoin
Blockchain
Solidity
C
Linux
Ethereum
React
Node.js
$50 hourly
Mykola O.
- 0.0/5
- (0 jobs)
Hi! Thanks for visiting here. I am an excellent web & blockchain developer. With 5+ years of experience, I’ve enjoyed a variety of amazing and interesting projects and tasks from clients all over the world. I am always be honest with a client about deliverables, timelines, and what works and what doesn’t. The only thing that matters to me is giving my clients the best possible result for all their needs. If you’re in the market for a new website & app (or an improved one), I’m happy to speak with you on your schedule to figure out the problem and quickly fix it. My Ability ★ Management your project from scratch to publish. ★ Marketing sense for the success the project ★ Love long-term relationship and update real time. ★ Always work on your time zone. ★ Always online to communicate anytime you want. My Skill ★ =====> Blockchain -Deeply knowledge about several blockchain standards like Ethereum, BSC and DeFi eco-system -New token deployment based on ERC20, ERC721, ERC1155, BEP20, BEP721, BEP1155 -Defi platforms for staking, yield farm, NFT marketplace & minting platform, Crypto game & launchpad to generate passive income -Trading snip bots on several DEXs like Uniswap, Pancakeswap (Front-running, Arbitrage bot) -Smart contract, Solidity, Rust, truffle/hardhat, web3.js/ether.js, bitQuery, Charting View… ★ =====> Websites & Apps -Backend : Core PHP, Laravel, CI, Node.js, Express -Frontend : Html5/CSS3, jQuery, React.js, Angular.js, Vue.js, Bootstrap -CMS: WordPress, WIX, Shopify, Django, Flask, Web2py -DB : MySQL, PostgreSQL, MongoDB, SQLite, Firebase -API : Restful API, All types of web services. -Python: AI, Scraping, BOT, Automation ★ =====> Mobile Apps Hybrid: React Native, IONIC ★ =====> Desktop Apps C++, Qt, PyQt, FileMaker

Bitcoin
Cryptocurrency
Redux
DApps
Rust
Solidity
Ethereum
Blockchain
Smart Contract
Binance Coin
React
Ether
TypeScript
web3.js
Python
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