Solidity Experts For Hire
Showing 65 results
Sponsored Freelancers
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Hire AwaisChaudhry
ZAWN Tech is a trusted software company founded in 2014, delivering complete digital solutions for startups and enterprises worldwide. Our certified developers combine deep technical knowledge with real-world project experience to build fast, secure, and scalable systems. Core Expertise Blockchain: Metaverse, Web3,...ZAWN Tech is a trusted software company founded in 2014, delivering complete digital solutions for startups and enterprises worldwide. Our certified developers combine deep technical knowledge with real-world project experience to build fast, secure, and scalable systems. Core Expertise Blockchain: Metaverse, Web3, NFTs, NFT Games, Smart Contracts, Arbitrage & Sniper Bots, DEX / DApp Development (Ethereum, BSC, Polygon, Solana, WAX). Web & SaaS Development: Full-stack using React, Node.js, Laravel, Django, and Next.js. Integration with Odoo, Bubble.io, Zoho, and Webflow. eCommerce: Shopify, WooCommerce, Magento, and custom marketplace platforms with payment, shipping, and ERP integrations. Mobile Apps: Native and cross-platform (Flutter, React Native, Android, iOS). AI & Computer Vision: Chatbots, GPT integrations, TensorFlow, OpenCV, and OCR systems. Game Development: Unity 3D, Unreal, and WebGL with multiplayer, blockchain, and AR/VR support. Trading & Financial Automation: MT4/5, TradingView, Binance, Interactive Brokers, and algorithmic trading bots. Hardware & IoT: Electronics, Microcontroller, PLC & SCADA, Electrical Engineering, Embedded Systems ,Control Engineering ,Automation, Arduino, Raspberry Pi, ESP32, MATLAB, embedded control, and automation projects. SEO, Digital & Internet Marketing, Amazon, Statistical Analysis With 200+ recommendations and over a decade of experience, we turn complex ideas into reliable, production-ready solutions — delivered with clear communication and long-term support. less -
Hire justinw45
I am a highly skilled Full-Stack & eCommerce Developer with expertise in building scalable, secure, and high-performance web applications. With a strong foundation in React, Vue.js, Node.js, NestJS, Laravel, and database management (MongoDB, PostgreSQL, MySQL), I specialize in developing modern web platforms, APIs,...I am a highly skilled Full-Stack & eCommerce Developer with expertise in building scalable, secure, and high-performance web applications. With a strong foundation in React, Vue.js, Node.js, NestJS, Laravel, and database management (MongoDB, PostgreSQL, MySQL), I specialize in developing modern web platforms, APIs, and complex backend systems. I have extensive experience in Shopify, WooCommerce, BigCommerce, Magento, and custom eCommerce solutions, helping businesses build, optimize, and scale their online stores. From theme customization and app development to third-party integrations, performance optimization, and automation, I ensure seamless and high-converting eCommerce experiences. Beyond web development, I specialize in web scraping, data automation, and AI-driven solutions using Python, Selenium, Puppeteer, and BeautifulSoup to extract, process, and analyze data efficiently. I integrate AI models for automation, predictive analytics, and intelligent data processing, enhancing decision-making and operational efficiency. I also have a strong background in blockchain development, working with Solidity, Ethereum, Binance Smart Chain (BSC), Polygon, and Rust for Solana to build smart contracts, NFT marketplaces, DeFi applications, crypto wallets, and blockchain-based payment gateways. I ensure secure and efficient Web3 integrations for decentralized applications. I am passionate about delivering cutting-edge solutions that merge eCommerce, AI automation, web development, and blockchain technology to drive innovation and business growth. Whether you need a scalable eCommerce store, AI-powered automation, data scraping solutions, or secure blockchain implementations, I am here to help. Let’s build the future of intelligent, data-driven, and scalable applications together! less -
Hire diogos47
Senior Full-Stack & Embedded System Engineer with 13+ years building production systems across embedded IoT, AI, Web3, mobile, and backend infrastructure. Design and ship software end to end — from bare-metal board bring-up and custom Linux distributions to cloud-connected backend systems and user-facing...Senior Full-Stack & Embedded System Engineer with 13+ years building production systems across embedded IoT, AI, Web3, mobile, and backend infrastructure. Design and ship software end to end — from bare-metal board bring-up and custom Linux distributions to cloud-connected backend systems and user-facing applications. Clean architecture, secure implementation, and delivery grounded in real-world hardware constraints. Comfortable owning the full stack — from kernel space to cloud infrastructure — so projects move without coordination overhead. 🎯 SYSTEMS THINKING - Scalable, modular architecture - Edge cases addressed early - Long-term maintainability over quick patches EMBEDDED LINUX & IoT - Custom Linux distributions (Yocto, Buildroot, BSP) — board bring-up, kernel development, driver integration across x86, ARM, and RISC-V - OTA update infrastructure, A/B partitioning, secure boot, TPM 2.0 encryption, read-only rootfs, fleet provisioning - Peripheral and connectivity protocols — UART, SPI, I2C, CAN bus, USB, BLE, MQTT, cellular, LoRa - Production targets — industrial gateways, POS terminals, medical devices, kiosk appliances, edge compute nodes AI & AUTOMATION - LLM-based systems, RAG pipelines, AI agents - OpenAI API and custom model integrations - Edge AI inference — TensorFlow Lite, ONNX Runtime on embedded targets - Workflow automation and data pipelines BACKEND & WEB - FastAPI, RESTful APIs, authentication systems - React and Next.js applications - Real-time and event-driven architecture - Full LEMP/LAMP stack deployment and optimization MOBILE APPS - API-first mobile architecture - Secure authentication and real-time features - Production-ready builds and deployment WEB3 - Smart contracts in Solidity and Rust - EVM and Solana ecosystems - DeFi protocols, token mechanics, on-chain integrations If you need someone who can take ownership, reduce moving parts, and ship cleanly without constant supervision, we'll work well together. less -
Hire itswahabahmad
Experienced Unity Game Developer | AR/VR Specialist | Unreal Engine | Roblox Games Greetings! I am an experienced Game Developer with 5+ years of professional experience creating engaging and high-performance games and interactive applications. I specialize in Unity, Unreal Engine, Roblox, and immersive AR/VR...Experienced Unity Game Developer | AR/VR Specialist | Unreal Engine | Roblox Games Greetings! I am an experienced Game Developer with 5+ years of professional experience creating engaging and high-performance games and interactive applications. I specialize in Unity, Unreal Engine, Roblox, and immersive AR/VR experiences, helping clients transform ideas into polished and scalable products. 🎮 Unity Game Development With over 5 years of dedicated Unity experience, I develop high-quality 2D and 3D games for PC, mobile, and Web platforms. I focus on delivering optimized gameplay, smooth mechanics, and visually engaging environments that keep players engaged. 🕶️ AR/VR Development I create immersive Augmented Reality (AR) and Virtual Reality (VR) experiences for training, simulations, games, and interactive applications. My focus is on intuitive interactions, realistic environments, and optimized performance for modern XR devices. 🚀 Unreal Engine & Roblox Development I also develop gameplay systems, mechanics, and multiplayer experiences using Unreal Engine and Roblox, delivering scalable and engaging game environments tailored to your project needs. Why Work With Me? ✔ 6+ Years of Game Development Experience ✔ Expertise in Unity, Unreal Engine, Roblox, AR/VR ✔ Strong gameplay system design and problem-solving ✔ Focus on performance, scalability, and quality ✔ Reliable communication and on-time delivery I am passionate about building innovative gaming experiences and immersive applications that stand out in today's competitive market. 📩 Let’s discuss your project and bring your ideas to life! less -
Hire aqibnasim
SiliconNexus is a technology solutions provider dedicated to helping businesses succeed in a rapidly changing world. We specialize in the development of sustainable, end-to-end solutions that are tailored to meet the specific needs of our clients. Our team of experienced professionals is committed to providing the...SiliconNexus is a technology solutions provider dedicated to helping businesses succeed in a rapidly changing world. We specialize in the development of sustainable, end-to-end solutions that are tailored to meet the specific needs of our clients. Our team of experienced professionals is committed to providing the highest quality solutions that are secure, scalable, and cost-effective. We stay at the forefront of technology and leverage the latest innovations to create solutions that are reliable and easy to use. ⭐ Services We Offer ✔ Web 2.0 ☑️ UX/UI research & design ☑️ Frontend development: React.js, Vue.js, Typescript ☑️ Backend development: Python (Django), Node.js, ☑️ Mobile app development: Flutter, React Native ✔ Web3.0 & Blockchain Solutions ☑️ Chains - Ethereum, EOS, Solana, Binance, Polygon ☑️ Smart contracts = ERC20, ERC721, ERC721A, ERC1155 ☑️ DeX's - Pancake Swap, Uniswap, Sushi Swap ☑️ DAO - From smart contract development to DAO governance ☑️ dApps - NFT minting buy, sell OR digital assess buy / sell OR Identity management etc. ☑️ Hyper-ledgers - Substrate [custom chain development] ✔ Embedded Systems Development ☑️ Hardware Design - PCB , High Speed, antennas & FPGA's ☑️ Drivers Development - I2C, CAN, USART, PCIe, AXI, DMA, Interrupt Controllers ☑️ Embedded Linux - Yocto , BitBake, ☑️ IOT application development - BLE, LTE 4G, 5G, LoraWAN, Zigbee, WiFi & Wifi6 ☑️ Cloud Integrations - GoogleCloud, Azure, AWS ☑️ Hardware Design & Verification Services - RISCV SoC design & verification ⭐ Our commitment ✅ 100% work quality ✅ Project demonstration & documentation ✅ Active support against any issue (even after deployment) ✅ 15 hours free-of-cost maintenance & support ✅ Free Discovery sessions & project consultation At SiliconNexus, we believe in building long-term partnerships with our clients. Our commitment to customer service and excellence ensures that we exceed our clients’ expectations. We are passionate about helping our clients stay ahead of the competition by providing them with the best technology solutions available. Silicon Nexus Business Development & Consultant Book a Free Consultation Call less -
Hire danielboggs
danielboggs danielboggs
$60 USD / hour
Exceed Your Expectation! Let's Do It Together!!United StatesWe deliver custom software solutions for startups, growing businesses, and modern enterprises that need reliable, scalable, and results-driven technology. With 10+ years of experience, our team builds and improves digital products across AI, web, mobile, e-commerce, blockchain, automation, and data systems. We...We deliver custom software solutions for startups, growing businesses, and modern enterprises that need reliable, scalable, and results-driven technology. With 10+ years of experience, our team builds and improves digital products across AI, web, mobile, e-commerce, blockchain, automation, and data systems. We support projects from planning and architecture to development, testing, deployment, and ongoing optimization. Our core expertise includes: • AI automation and business workflow systems • Custom web and mobile application development • E-commerce platforms and tailored store functionality • API development, backend integration, and system architecture • Blockchain applications and smart contract solutions • Data engineering, pipelines, and process automation • UI/UX-focused product implementation • Performance optimization, monitoring, and system improvement • QA, security, and CI/CD workflows We believe strong products come from clear communication, practical engineering, and consistent execution. Our goal is to deliver software that is not only functional, but dependable, maintainable, and ready for real business growth. less -
Hire yuriihal
I build AI-driven backend systems that think, learn, and scale. Most companies use AI in fragments—a chatbot here, an automation there. I help startups and enterprises build complete AI ecosystems by integrating Large Language Models (LLMs) into robust, production-grade backend architectures. Whether you are building...I build AI-driven backend systems that think, learn, and scale. Most companies use AI in fragments—a chatbot here, an automation there. I help startups and enterprises build complete AI ecosystems by integrating Large Language Models (LLMs) into robust, production-grade backend architectures. Whether you are building an AI SaaS MVP from scratch or adding RAG-based intelligence to an existing platform, I deliver clean, maintainable, and secure code. What I bring to your project: 1. AI Integration: Expert in OpenAI (o1/GPT-4), Claude 3.5, and Gemini 2.0. I specialize in RAG (Retrieval-Augmented Generation) and AI Agent workflows using LangChain and CrewAI. 2. Backend Excellence: Scalable microservices built with FastAPI, Python, or NestJS. I focus on high-concurrency, security, and performance. 3. Vector Infrastructure: Implementation of Pinecone, Weaviate, or PGVector for efficient data retrieval. 4. SaaS Architecture: Multi-tenant database design, Stripe subscription logic, and RBAC (Role-Based Access Control). Why work with me? - Speed to MVP: I focus on getting your AI SaaS to market in 3–6 weeks without technical debt. - Product Thinking: I don't just follow tickets; I ask "Why?" to ensure the feature actually drives user value. - Security First: I ensure your AI integrations are prompt-injection resistant and GDPR/SOC2 compliant. TECHNICAL STACK: - AI & LLM: OpenAI API, LangChain, RAG, Prompt Engineering, Vector DBs (Pinecone) - Backend: Python (FastAPI, Django), Node.js (NestJS, Express), Go - Databases: PostgreSQL, MongoDB, Redis, Supabase - Cloud & DevOps: AWS (Lambda, ECS), Docker, GitHub Actions, Vercel - Integrations: Stripe, Auth0, Twilio, HubSpot, Slack API less -
Hire Xakimbek007
I specialize in Web Development, Mobile App Development, Artificial Intelligence, Machine Learning, and Unity (2D/3D) development. With a strong problem-solving mindset and hands-on experience across modern frameworks and tools, I develop secure, scalable, and innovative applications tailored to client needs. My goal...I specialize in Web Development, Mobile App Development, Artificial Intelligence, Machine Learning, and Unity (2D/3D) development. With a strong problem-solving mindset and hands-on experience across modern frameworks and tools, I develop secure, scalable, and innovative applications tailored to client needs. My goal is to build solutions that are not only functional but also future-ready 1. Web Development (Full-Stack) -Frontend Development React.js / Next.js Vue.js Angular HTML5, CSS3, Tailwind, Bootstrap TypeScript & JavaScript (ES6+) Responsive & Mobile-First Design SEO Optimization Performance Optimization -Backend Development Node.js (Express / NestJS) Python (Django / FastAPI) PHP (Laravel) Java(Spring Boot) RESTful API Development GraphQL Authentication (JWT, OAuth) Payment Integration (Stripe, PayPal) WebSockets / Real-time apps -Database Management MongoDB PostgreSQL MySQL Firebase Redis Database Design & Optimization -Deployment & DevOps AWS Google Cloud Docker CI/CD Pipelines Nginx VPS Deployment 2. Mobile App Development -Cross-Platform Flutter React Native Expo Firebase Integration -Native Development Android (Java) iOS (Swift) -App Features Push Notifications In-App Purchases API Integration Google Maps Integration Social Login App Store / Play Store Publishing 3. AI & Machine Learning -Machine Learning Supervised & Unsupervised Learning Regression, Classification, Clustering Model Training & Evaluation Scikit-learn -Deep Learning PyTorch CNN, RNN, LSTM -NLP Chatbot Development Sentiment Analysis Text Classification OpenAI API Integration LLM Applications -Computer Vision Object Detection Image Classification OpenCV -Data Science Pandas NumPy Data Visualization (Matplotlib, Seaborn) Data Cleaning & Preprocessing 4. Unity Game Development Unity 2D & 3D Development C# Programming Physics & Animation Systems Game Mechanics & Gameplay Design UI/UX for Games less -
Hire CyberTala777
I am a highly skilled and experienced professional with over 10 years in web development and blockchain technology. My key strengths include the following: █ Proficiency in various programming languages including PHP, HTML, CSS, and JavaScript, as well as frameworks such as Laravel, MERN, LAMP, and CodeIgniter. █...I am a highly skilled and experienced professional with over 10 years in web development and blockchain technology. My key strengths include the following: █ Proficiency in various programming languages including PHP, HTML, CSS, and JavaScript, as well as frameworks such as Laravel, MERN, LAMP, and CodeIgniter. █ Strong knowledge and experience in blockchain platforms including Ethereum, Binance, and Hyper Ledger Fabric, as well as EVM compatibility and DApps. █ Experience in eCommerce platforms, CRM and HRM systems, and Real Estate, Multifamily and IDX, MLS. █ Experience in Project management, Testing, SQA, SEO, and Social Media Marketing █ Strong knowledge in Web development technologies like WordPress, Shopify, WooCommerce, Open Source Framework, UI, UX, Figma, Illustrator, Adobe XD, Photoshop, Lottie Animation, NFT artwork, Google Cloud, Express JS, Alpine JS, Elementor, Laravel Livewire, Angular, Python, Django, Tailwind CSS, Keras, Java, Bootstrap, Flutter, Dart, .Net, C#, Blazer Components, Wix, Webflow, Backbone JS, Svelte, Headless CMS, Socket.io █ Experience in Storybook JS, Node JS, Vue JS, Next JS, Nuxt JS, Material UI, TypeScript, Core PHP, Open Cart, Magento, bubble.io, MVC architecture, Micro Service Architecture, Monolithic Architecture, Open Source Framework, UI, UX I am a dedicated and diligent individual who is able to work effectively both independently and as part of a team. I am committed to staying current with the latest technologies and best practices in my field and I am able to successfully manage and deliver projects from start to finish. less -
Hire sergioes
# Roles - Agile project manager / engineering manager / lead developer / developer. # Current availability - Part-time. # Current interests - Software development productivity and good practices for small to mid-sized teams. - Challenging projects and learning new things (any role, including developer). -...# Roles - Agile project manager / engineering manager / lead developer / developer. # Current availability - Part-time. # Current interests - Software development productivity and good practices for small to mid-sized teams. - Challenging projects and learning new things (any role, including developer). - React.js, Angular.js, Nest.js, Express.js, Node.js, MongoDB, cloud (Docker, Kubernetes). - Web3, DeFi, Blockchain, Fintech, Crypto. # Experience - July 2005 - current: Freelancer.com and other markets. Freelance developer. More than 400 projects successfully completed, being one of the top-rated developers. - December 2021 - August 2023: crypto market and modern banking startup. Project manager / engineering manager / technical director directly reporting to the CEO & founders. - March 2017 - May 2020: Power Software Consulting. Lead developer (MEAN stack) for a complex multimedia CMS. - August 2011 - August 2014: MockupScreens.com. Project manager. # Education - 2003-2009 Public University of Spain: Technical Engineer in Telecommunications (B.Sc. Degree equivalent in the USA). # Languages - English: * Writing: native-like. * Speaking: good. - Spanish: native. # Other - I have been using (GNU?/)Linux as my main OS for many years, and I have a preference for open-source software. less
