ECMAScript Developers Untuk Diupah
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Freelancers Ditaja
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I am a Senior Full-Stack Developer with extensive experience delivering scalable, secure, and high-performance web and mobile applications. I help startups and established teams transform ideas into production systems that support real operations and long-term growth. I work across the entire lifecycle - discovery,...I am a Senior Full-Stack Developer with extensive experience delivering scalable, secure, and high-performance web and mobile applications. I help startups and established teams transform ideas into production systems that support real operations and long-term growth. I work across the entire lifecycle - discovery, architecture, development, deployment, and continuous improvement. My focus is on building resilient solutions, controlling technical debt, and enabling teams to ship features with confidence. Core Expertise ≫ Backend Engineering: JavaScript, Node.js, Express.js, C#, .NET Core, ASP.NET MVC, ASP.NET Web API, Entity Framework ≫ Frontend & Web: React, Next.js, Redux, TypeScript, Tailwind CSS, responsive UI development ≫ Mobile: React Native for iOS and Android, push notifications, offline-ready patterns ≫ Databases & Storage: SQL Server (complex stored procedures), MySQL, MongoDB, Firebase, Firestore, PostgreSQL,Supabase ≫ API Design: REST, GraphQL, Swagger/OpenAPI, versioning ≫ Security & Identity: OWASP best practices, JWT, OAuth, Identity Server, role-based access control ≫ Cloud & DevOps: AWS, Azure, Docker, CI/CD pipelines, environment configuration, logging & monitoring ≫ Integrations: Stripe, PayPal, third-party APIs, webhooks ≫ AI Integration: OpenAI APIs, chat and assistant features, summarization, classification, workflow automation Legacy Systems & Modernization ≫ VB.NET, ASP.NET Web Forms, Windows Forms desktop applications ≫ Feature enhancements and module extensions ≫ Bug fixing and performance improvements ≫ Refactoring toward maintainable architectures ≫ Gradual migration to .NET Core / modern stacks ≫ Stabilizing long-running production systems Architecture & Engineering Practices ≫ Clean / Layered architecture ≫ SOLID principles ≫ Domain-driven design concepts ≫ Microservices & modular monoliths ≫ Dependency injection ≫ Repository & Unit of Work ≫ Event-driven approaches I regularly design clean service architectures, build admin and customer-facing applications, modernize legacy systems, and prepare platforms for scale. I am comfortable joining existing teams or leading new builds from the ground up. Clients value my structured communication, accountability, and ownership mindset. I deliver software that works in production, is easy to extend, and continues to provide value well beyond the initial release. I’m ready to contribute and deliver from day one. kurang
Upah mazharsahil12
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My personality with clients to build their vision and grow relationships: ✔ Always open to discuss ✔ Delivery in time ✔ High-problem solving & high-quality ✔ Honesty ✔ Adaptability ✔ Professionalism ? Master of Science in Software Engineering. ? After 10+ years of working in various IT agencies, I've decided to bring...My personality with clients to build their vision and grow relationships: ✔ Always open to discuss ✔ Delivery in time ✔ High-problem solving & high-quality ✔ Honesty ✔ Adaptability ✔ Professionalism ? Master of Science in Software Engineering. ? After 10+ years of working in various IT agencies, I've decided to bring my skills here. A proficient Full-Stack Developer with extensive experience in building high-performing, scalable, and innovative web & mobile solutions. Specializing in both front-end and back-end technologies, with a proven track record of excellence in using React & Vue, Node.js, Django and Laravel to deliver responsive and efficient applications. 1. Programming Languages: HTML/CSS, JavaScript(ES6+), TypeScript, Java, PHP, Python. 2. JS & CSS Frontend Frameworks & Libraries: - React & Next.js UI Libraries: MUI, Chakra UI, AntD, Shadcn, Styled Components. - Vue & Nuxt.js UI Libraries: Vuetify(+), Quasar, PrimeVue, BootstrapVue. - CSS Frameworks: Tailwind CSS, Semantic UI, Bootstrap 4+. - Frontend Build Tools: Webpack, Vite. - Managing State Libraries: Redux, Mobx, Zustand. Jotai, Tanstack. 3. JS Mobile Frameworks: React Native & Expo. 4. RESTful API & GraphQL, Prisma ORM 5. Node.js Backend Frameworks: Express.js, Nest.js & Web Socket, Socket.io 6. PHP Frameworks: Laravel(+Vue, +Livewire), CodeIgniter, WP. 7. Python Frameworks & Packages: Django Stack, FastAPI, BS4, Selenium, Requests. 8. Databases: MySQL/PostgreSQL, MongoDB. 9. Cloud Platforms & 3rd API Integrations: Vercel, AWS, GCP, Microsoft Azure, Digital Ocean, Stripe, Convex, Clerk, Egdestore. 10. Agile & CI/CD: Jira, Trello, Monday, Github, Gitlab, Bitbucket 11. AI chatbot integration for user interaction and support I am also an avid learner, keeping up with the latest tech trends and best practices to maintain the relevance and impact of my contributions. I aim to leverage my skills to build innovative and efficient software solutions that exceed client expectations. I am committed to continuously learning and staying updated with industry trends. Thank you for considering my profile. Looking forward to the opportunity to work with you. kurang
Upah minhmdang1989
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AbhishekSingh08 AbhishekSingh08
$60 USD / jam
Full-Stack Developer (7+ years) & Statistician 6+IndiaI am a Full-Stack Developer and Biostatistician with 7+ years of professional experience, offering two specialized services under one profile—advanced software development and high-quality statistical analysis. Clients can engage me for either role independently or both together, depending on project needs. 🔹...I am a Full-Stack Developer and Biostatistician with 7+ years of professional experience, offering two specialized services under one profile—advanced software development and high-quality statistical analysis. Clients can engage me for either role independently or both together, depending on project needs. 🔹 Full-Stack Developer (7+ Years) I design and develop scalable, secure, and high-performance web and mobile applications from concept to deployment. I handle the complete development lifecycle, including UI/UX design, backend architecture, database design, API development, testing, and cloud deployment. I focus on clean, maintainable code, performance optimization, and reliable system architecture—especially for data-driven and research-oriented platforms. Key Skills: Frontend: React, Angular, HTML5, CSS3, Bootstrap, Tailwind Backend: Node.js, Django, Flask, REST APIs, .NET Mobile Apps: React Native, Flutter Databases: PostgreSQL, MySQL, MongoDB, SQL Cloud & DevOps: AWS, Docker, CI/CD Testing, security, and performance optimization 🔹 Biostatistician & Statistician (6+ Years) I am an experienced Biostatistician and Statistician specializing in clinical research, biomedical studies, public health, and epidemiology. I support clients by converting raw data into accurate, reproducible, and publication-ready statistical results. My work is aligned with academic, clinical, and regulatory standards, ensuring results are reliable and clearly interpretable for decision-making, manuscripts, and presentations. Key Expertise: Study design, protocol review, and sample size calculation Clinical trial and biomedical data analysis Regression models, survival analysis, longitudinal data analysis Randomization and statistical modeling Tools: R, SAS, SPSS, Python Manuscript-ready tables, figures, and detailed reports Why Work With Me? Two specialized skill sets in one professional Clear separation of development and statistics work Strong communication and documentation High-quality, deadline-driven delivery kurang
Upah AbhishekSingh08
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I am a senior Full Stack Software Engineer with over 10 years of experience delivering complete, high-performance solutions across Shopify, Online Marketing, CRM, CMS, Go High Level, Hub Staff, full-stack web/mobile development, iOS applications, and AI/ML-powered intelligent systems. My work spans the entire...I am a senior Full Stack Software Engineer with over 10 years of experience delivering complete, high-performance solutions across Shopify, Online Marketing, CRM, CMS, Go High Level, Hub Staff, full-stack web/mobile development, iOS applications, and AI/ML-powered intelligent systems. My work spans the entire technology stack—from hardware-level programming and kernel engineering to cloud dashboards, mobile apps, and AI automation that connects everything together. I build stable, secure, production-ready systems used in robotics, IoT, industrial automation, automotive, smart devices, and modern cloud platforms. Full-Stack Engineering * Frontend: React, Next.js, TypeScript * Backend: Node.js, Python (FastAPI, Flask), REST/GraphQL APIs * Databases: PostgreSQL, MySQL, MongoDB * Cloud: AWS, Docker, CI/CD, Edge-to-Cloud Integration * Building dashboards, remote monitoring & control systems for embedded devices * IoT platforms, OTA firmware update servers, device management portals Blockchain & Web3 Development * Smart Contracts: Solidity, Rust, Go (Hyperledger Fabric chaincode) * Blockchains: Ethereum, BSC, Polygon, Hyperledger Fabric, Solana * Development Tools: Hardhat, Foundry, Truffle, Fabric test-network, Chaincode lifecycle * Frontend: React, TypeScript, Web3.js, ethers.js, WalletConnect, dApp interfaces * Backend: Node.js (NestJS), Python, REST/GraphQL APIs, Oracle integration * Infrastructure: Docker Compose V2, Kubernetes, nginx, PM2, multi-node deployments * DeFi Protocols: Token contracts (ERC20/721/BEP20), DEX/AMMs, yield farming, staking * Enterprise: Permissioned networks, multi-channel Fabric setups, supply chain DLT solutions AI, ML & Intelligent Systems * AI/ML Integration into Embedded Systems * Python-based ML pipelines (PyTorch, TensorFlow, scikit-learn) * Computer Vision for edge devices (OpenCV, YOLO, ONNX Runtime) * TinyML and model optimization for constrained hardware * Sensor fusion, anomaly detection, predictive maintenance * LLM integration via API for device automation or cloud dashboards Technology Stack & Tools * Languages: C, C++, Embedded C, Python, Shell/Bash, JavaScript/TypeScript * OS/RTOS: Linux, FreeRTOS, Zephyr * Build Systems: Yocto, Buildroot, CMake, Make, Bitbake * Debugging: GDB, JTAG, Valgrind, Oscilloscope, Logic Analyzer * Cloud/DevOps: Docker, AWS, GitHub Actions, CI/CD * AI Tools: PyTorch, TensorFlow, ONNX, OpenCV kurang
Upah draganm59
