Hire the Best Blockchain Developers
in Bangladesh

Want to work with an experienced Blockchain developer who can bring your smart contract, decentralized application (dApp) vision to life? Are you looking for a Solidity or Rust developer to develop "Gas-Optimized" smart contracts? Whether you're looking to create ERC20 or SPL tokens, ERC721, ERC1155, or NFTs with custom features, concerned about vulnerabilities and exploits in your high-value contracts, need to write tests for contracts, or need a script to interact with leading DEX protocols—I've got you covered. 🖐 Some of my previous clients' quotes about me: ✔️ "...Excellent technical skills and consistently good communication... Completed the project in a timely fashion, exceeding our original deadline." ✔️ "His work was phenomenal...made sure I understood every step along the way... ✔️ "..took this project on as if it was his own... Great professional skills, always there to answer questions and suggest the best solutions." ✔️ "...Every facet of his work was impressive. WOW!" ✔️ "... goes above and beyond. Md's professionalism and expertise in blockchain are unmatched.." ✔️ "... communication is excellent, delivery is fast, and his knowledge of smart contracts is impressive." With expertise in EVM-compatible chains (like Ethereum, BSC) and Solana, I specialize in delivering high-performance, gas-optimized smart contracts and dApps tailored to your specific requirements. I help my clients build secure and highly resilient smart contracts, minimizing vulnerabilities and ensuring your code is fortified against exploits. I might be the perfect fit if you're thinking of any of these: ✅ "I need the BEST developer who's as passionate about my success as his own." ✅ "I want someone who will walk me through every step of smart contract interaction." ✅ "Gas fees are too high! My smart contract needs to be lightning-fast and cost-efficient." ✅ "I know blockchain, but I need a professional to make my smart contracts 100% secure." ✅ "I’m not an Ethereum or Solana expert, and I don’t have time to mess around with dApps." ✅ "Our last dApp was a disaster—I can’t afford to let that happen again." ✅ "I need an EVM-compatible blockchain or Solana expert to cover all my bases for cross-chain or multi-chain applications." Working with me, you will: 💎 Gain access to a developer skilled in Python, JavaScript, TypeScript, Rust, Solidity, Brownie, Hardhat, NextJS, Foundry, and Anchor. 💎Eliminate vulnerabilities and reduce gas fees during both deployment and interactions. 💎 Maximize your DApp's security with continuous follow-ups for improvements. 💎 Save time and resources—you won’t need to hire separate back-end, front-end, Rust, or Solidity developers because I handle it all as a full-stack developer. 💎 Receive custom scripts to swap, add, or remove liquidity, lend, deposit, borrow, withdraw, and interact across top dApp protocols. 💎 Optimize for multi-chain functionality—Whether you need to bridge Ethereum, BSC, or Solana, I can create solutions that integrate seamlessly across multiple networks. 🖐 My Skills & Expertise in Blockchain: ☑️Solidity Development for EVM-compatible smart contracts ☑️Rust Development for Solana Blockchain ☑️Experience with Chainlink, various ERC standards, and OpenZeppelin ☑️Token development(ERC20/BEP20/SPL) with features like Mintable, Burnable, Reflections, TxFee, Whitelist/Blacklist, and IDO/ICO for tokens. ☑️NFTs (ERC721, ERC1155, ERC404, etc) with Whitelist, Royalties, Presale, Public Sale, Dutch Auctions, IPFS Hosting, and Dynamic NFTs ☑️Full-stack Blockchain Developer with expertise in Solidity, Python (Brownie), JavaScript (Hardhat), Typescript, Rust(Anchor), NextJS, and Foundry. ☑️Script/Program Development for deploying/interacting with smart contracts and protocols like Aave, Uniswap, Raydium, and PancakeSwap. Why Work With Me: 💎Extensive Experience: I've designed and built hundreds of smart contracts from scratch, creating robust back-end scripts for deployment. 💎Expert Problem Solver: Proficient in designing projects from the ground up, solving complex problems, and rapid iterative prototyping. 💎Gas Optimization Strategies: I use professional strategies to optimize smart contracts for minimal gas fees and thoroughly test them to identify and prevent potential exploits. My Background in Numbers: ✔️ Over 3 years of experience with Blockchain technology. ✔️ Developed numerous DApps and scripts for protocols and tokens, including ERC20, BEP20, SPL, ERC721, and ERC1155. ✔️ Worked on several growing DApp projects, such as Crowdfunding platforms, Airdrop systems, DEXs, insurance, ICO, IDO, Tokens, Lottery, and NFT marketplaces. ✔️ Created a variety of smart contracts. ✔️ Wrote extensive test scripts for smart contracts using Foundry, Hardhat, and Anchor. Sound Like a Fit? Next Steps: Click the green "Invite to Job" button in the top right-hand corner or send me a message, and let’s schedule a call to discuss your project! Otherwise, feel free to book a consultation!

Are you looking for a secure, high-performance web application, a gas-optimized smart contract, or a full-scale decentralized application (DApp)? I engineer robust, scalable solutions engineered for speed, safety, and long-term reliability. I am Sayem Abedin, a Full-Stack Developer and Blockchain enthusiast. My mission is to transform your ideas—whether a traditional Web2 platform or a cutting-edge Web3 concept—into a production-ready reality. From custom SaaS platforms to complex smart contracts, I deliver secure, hassle-free development from the ground up. 🛠️ Core Development Services 1. Web3 & Smart Contract Engineering: Custom Smart Contracts: Developing tailored, secure decentralized logic using Solidity and OpenZeppelin standards. Token Creation & Deployment: Launching secure tokens across major EVM chains (ERC-20, BEP-20, TRC-20). Gas Optimization: Writing highly efficient code to radically minimize transaction and execution costs for your users. Security & Auditing: Line-by-line manual code analysis and simulated deployment attacks to safeguard against vulnerabilities (e.g., Reentrancy, Front-Running). 2. Full-Stack Web Application Development: Custom Web Applications: Building scalable, secure, and production-ready Web2 platforms, SaaS solutions, and dynamic websites. Frontend UI/UX: Crafting highly responsive, lightning-fast, and intuitive user interfaces using React and Next.js, optimized for both SEO and conversion. Robust Backend & Architecture: Architecting secure, type-safe backend systems and high-throughput REST or GraphQL APIs using Node.js and NestJS. Database & State Management: Designing reliable data layers utilizing relational and non-relational databases like MongoDB and Supabase. Third-Party Integrations: Seamlessly embedding reliable payment gateways (like Stripe), webhooks, and external APIs into your workflow. 3. DevOps & Infrastructure: Containerization & Server Setup: Streamlining environments using Docker for smooth local development and isolated production deployments. CI/CD Automation: Setting up robust deployment pipelines using GitHub Actions and automated webhooks. Cloud Hosting & Scalability: Deploying and managing cloud infrastructure securely across AWS and GCP. 💡 Why Partner With Me? I don't just write code; I build secure, comprehensive ecosystems. To guarantee absolute peace of mind, I provide complimentary support post-launch to ensure your web application or DApp runs seamlessly long after deployment. 💻 Technical Stack Frontend: React.js, Next.js, Tailwind CSS, HTML5/CSS3 Backend & Database: Node.js, Express.js, NestJS, MongoDB, Supabase Blockchain: Solidity, Web3.js, Ethers.js, Hardhat, Truffle, OpenZeppelin DevOps & Tools: Docker, GitHub Actions, AWS, GCP, Git Gateways & Payments: Stripe, REST APIs, Webhooks Let’s Build Something Great Together I am looking forward to collaborating with you. Send me a message today, and let's discuss the technical roadmap to bring your web application or Web3 project to life!

Hi there👋! Zakir here😃, Are you looking for an expert Software and Website and Blockchain Developer ? I’m a developer and having more then 5 years of experience on building Software and websites and Blockchain for small and medium-sized businesses. Whether you’re trying to win work, list your services, or create a new online store, software's, I can help. 📊My stats 🏆Top Rated on Upwork 🚀 Fast Response 🚀 100% Job Success 💡My Core Skills: Knows ✅✅✅✅✅✅Full Stack Development Languages✅✅✅✅✅✅ ✅CSS 3 ✅SCSS ✅Microsoft VBScript ✅Dart ✅ASP ✅HTML ✅SQL ✅TypeScript ✅Sass ✅CSS ✅HTML5 ✅JavaScript ✅Python ✅C++ ✅Java ✅PHP ✅GraphQL ✅Twilio API ✅C# ✅ Visual Basic ✅✅✅✅✅✅ Web Servers ✅✅✅✅✅✅ ✅Cloudflare ✅Apache Tomcat ✅Microsoft IIS ✅Apache HTTP Server ✅NGINX ✅✅✅✅✅✅ Databases ✅✅✅✅✅✅ ✅SQLite ✅PostgreSQL ✅Oracle Database ✅MySQL ✅Microsoft Access ✅✅✅✅✅✅ Full Stack Development Skills ✅✅✅✅✅✅ ✅ASP.NET Web API ✅SaaS ✅Vue.js ✅Amazon Web Services ✅webpack ✅.NET Framework ✅Django ✅Netlify ✅ChatGPT ✅Spring MVC ✅Tailwind CSS ✅GitHub ✅React Bootstrap ✅RESTful API ✅.NET Compact Framework ✅Custom PHP ✅ASP.NET MVC ✅AJAX ✅ExpressJS ✅ASP.NET Core ✅ASP.NET ✅.NET Core ✅D3.js ✅Next.js ✅Git ✅CodeIgniter ✅Laravel ✅HTTP ✅Symfony ✅WordPress ✅XML ✅Google Cloud Platform ✅Vercel ✅React ✅Node.js ✅Responsive Design ✅jQuery ✅npm ✅Bootstrap ✅Apache Maven ✅Shopify ✅Figma ✅Elementor ✅Webflow ✅✅✅✅✅✅ Full Stack Development Deliverables ✅✅✅✅✅✅ ✅API Integration ✅Desktop Application ✅Website Redesign ✅Web Development ✅Chatbot ✅API Development ✅WordPress Plugin ✅Google Chrome Extension ✅Browser Extension ✅Web Application ✅Ecommerce Website ✅Full-Stack Development ✅Database Development ✅Postman ✅Python Test Automation ✅Framework Selenium ✅Git ✅Dapp Developer 🪄What I offer: - I use a data-driven approach to fully understand my target audience and project goals during development. - I prioritize user needs and preferences throughout the design process, ensuring intuitive and user-friendly interfaces. -I bring strong collaborative skills, working seamlessly with stakeholders, developers and cross-functional teams to bring designs from concept to implementation. - I conceptualize and design high-performing customer acquisition and retention pages with a focus on conversion rate optimization (CRO). I am truly excited about the possibility of contributing to the success of your project👩‍💻😁 Full project management from start to finish Regular communication is important to me, so let’s keep in touch. 📩 Sounds like a good fit? - Next Steps: Click the green ‘Send Message’ button in the top right-hand corner. 💫🚀Shoot me a message, let's create magic together!🤟 Md Zakir Hossain

Top Rated Plus Shopify App Developer with 9+ years of Shopify experience, $70K+ earned, 141 completed projects, and published apps on the Shopify App Store. I build production-ready Shopify apps, checkout extensions, Hydrogen storefronts, Shopify Plus integrations, and automated workflows for ecommerce brands, startups, and agencies. Published Shopify Apps: - Blog CTA - Real-Time Find & Replace - Simple Product Rating - Torosachi Subscription What I Can Build: - Custom Shopify apps using Remix, Polaris, Prisma, and Shopify CLI - Shopify Admin API, Storefront API, GraphQL, and REST API integrations - Shopify Billing API and subscription systems - Checkout UI Extensions and post-purchase extensions - Shopify Hydrogen and Oxygen storefronts - Shopify webhooks and workflow automation - Shopify theme development and Liquid customization - Figma to Shopify theme conversion - Shopify speed optimization and Core Web Vitals improvements - Third-party API integrations - Shopify Plus, Flow, B2B, Markets, and advanced storefront architecture Why Clients Hire Me: - Top Rated Plus on Upwork - 141 completed projects with 130+ reviews - Published Shopify App Store developer - Strong ownership from planning to deployment - Clean, scalable, production-ready code - Fast response time and clear communication - Long-term collaboration mindset Tech Stack: Shopify, Remix, Hydrogen, Polaris, Liquid, React, Node.js, TypeScript, GraphQL, Prisma, Next.js, REST APIs, Laravel If you need a Shopify expert who can build reliable apps, integrations, storefronts, or automation workflows, send me a message or invite me to your job.

Founder & CEO at EURAVETECH LLC | Technical Product Strategist & Full-Stack Web3 Developer As the founder and CEO of EURAVETECH LLC, I bridge the gap between complex software architecture and strategic business growth. I lead an elite team of senior engineers, designers, and tech specialists dedicated to building scalable, high-performance digital products for startups, SMEs, and enterprises globally. With extensive hands-on experience as a Full-Stack and Blockchain Engineer, I don’t just manage development—I ensure every line of code, cloud architecture setup, and AI model we deploy aligns perfectly with your long-term business objectives. How We Can Work Together: Dedicated Agency Teams: Scale your development instantly with a fully managed team of senior engineers, product designers, and DevOps experts under my direct supervision. Direct Technical Consultancy: Work with me one-on-one for high-level technical architecture, Web3/Blockchain tokenomics, smart contract auditing, and product roadmap strategy. Core Domain Expertise: Blockchain & Web3 Engineering: Advanced smart contract development (Solidity, Rust), Ethereum/EVM ecosystems, DeFi protocols, secure staking platforms, and dApp architecture. Production-Ready AI & Automation: Integration of custom LLMs, autonomous AI agents, and intelligent automated workflows to optimize business operations. Full-Stack Web & Mobile Applications: High-velocity, scalable platforms built on modern stacks like Node.js, TypeScript, Laravel, PHP, and Python. Why Partner With Us? Zero Junior Overhead: We believe in a senior-only approach. Your project will never be a training ground for junior talent. Absolute Transparency: Clear, fluent English communication, rigorous Scrum/Agile project management, and daily code commits. A Commitment to ROI: We don't just build features; we build future-ready infrastructure that drives efficiency, security, and measurable growth. Whether you are looking to launch a secure Web3 platform, deploy an advanced AI bot, or scale an enterprise SaaS product, my team and I have the technical excellence required to bring your vision to life. Let’s discuss your project goals. Click "Invite" or send a message to schedule a strategic discovery call.

Welcome to my profile! I'm Shakil Hossain, a healthcare software developer building HIPAA-compliant digital health products for clinics, hospitals, telemedicine startups, and health-tech founders since 2018. Web, mobile, and blockchain - all focused on one industry: healthcare. I design around PHI protection, HIPAA and HITECH compliance, FHIR/HL7 interoperability, RBAC, and audit logging from day one, not as an afterthought. My stack: React, Next.js, TypeScript, Python (FastAPI), TailwindCSS, PostgreSQL. ✅ Healthcare Web Application Development EHR/EMR systems and integrations, patient portals, telemedicine and telehealth platforms, practice management systems (PMS), appointment scheduling and online booking, patient intake and e-consent forms, provider directories, clinical dashboards, patient engagement tools, care coordination, chronic care management (CCM), and revenue cycle management (RCM) / medical billing workflows. FHIR-based data models (Patient, Practitioner, Appointment, Encounter, Observation), SMART on FHIR, and EHR connections to Epic and Cerner (Oracle Health). ✅ mHealth & Mobile App Development (iOS & Android) Telehealth video-visit apps, remote patient monitoring (RPM) and remote therapeutic monitoring (RTM), medication reminders and adherence tracking, symptom checkers, chronic disease management, behavioral and mental health apps, wellness and fitness apps, and wearable/device integration (Apple HealthKit, Google Fit, Fitbit, continuous glucose monitoring / CGM). Secure PHI handling with encryption at rest and in transit. ✅ Healthcare Blockchain & Web3 Development Smart contracts and DApps for medical-record integrity, patient consent management, decentralized identity (DID) and verifiable health credentials, pharmaceutical supply-chain traceability, drug anti-counterfeiting, and tokenized incentives for clinical trials and health data sharing. Blockchain applied where tamper-proof, auditable health records genuinely matter. Compliance & security I build in by default: HIPAA, HITECH, GDPR, and LGPD-minded architecture · PHI and PII protection · de-identification · role-based access control (RBAC) · audit logs · encryption (TLS/HTTPS) · MFA and SSO · OAuth2 · Business Associate Agreement (BAA)-ready design. Standards & interoperability I work with: FHIR (Fast Healthcare Interoperability Resources), HL7 v2, SMART on FHIR, DICOM medical imaging, and clinical code systems - ICD-10, CPT, SNOMED CT, LOINC, RxNorm. Health Information Exchange (HIE) and interoperability between siloed systems. Whether you're launching a telemedicine MVP, connecting a clinic's scheduling flow to an EHR, building an mHealth app for remote patient monitoring, or designing a blockchain health-records solution - let's discuss your healthcare project and make it a success! Specializations / Keywords: Healthcare, Digital Health, Health-Tech, HIPAA, HITECH, PHI, EHR, EMR, FHIR, HL7, SMART on FHIR, DICOM, Telemedicine, Telehealth, mHealth, Remote Patient Monitoring (RPM), Patient Portal, Practice Management, Medical Scheduling, e-Prescription (eRx), Clinical Decision Support, Revenue Cycle Management, Medical Billing, Interoperability, HIE, ICD-10, CPT, SNOMED CT, LOINC, Blockchain Healthcare, Health Data Security, React, Next.js, FastAPI, TailwindCSS