.NET Core Web API Developers For Hire
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Hire richardb063
Full Stack Developer with strong experience building scalable web and mobile applications, backend systems, APIs, and AI-powered solutions. Skilled in modern frontend and backend technologies including React, Next.js, Node.js, Python, PHP, Java, Spring Boot, Flutter, and cloud platforms like AWS and Azure. Experienced...Full Stack Developer with strong experience building scalable web and mobile applications, backend systems, APIs, and AI-powered solutions. Skilled in modern frontend and backend technologies including React, Next.js, Node.js, Python, PHP, Java, Spring Boot, Flutter, and cloud platforms like AWS and Azure. Experienced in developing SaaS platforms, CRM systems, AI agents, WhatsApp automation, payment integrations, and real-time applications. less -
Hire asharib17
Hi, I'm Asharib, a software engineer based in Kyoto. I deliver high quality, tailor-made software solutions that drive real results. With 6 years of proven experience, I specialise in modern tech stacks including MERN, MEAN, MEVN, Ruby on Rails (RoR), and Python. From building custom CMS platforms to developing...Hi, I'm Asharib, a software engineer based in Kyoto. I deliver high quality, tailor-made software solutions that drive real results. With 6 years of proven experience, I specialise in modern tech stacks including MERN, MEAN, MEVN, Ruby on Rails (RoR), and Python. From building custom CMS platforms to developing scalable social networks, I create robust, user-friendly products that empower businesses to grow and succeed. Every project we take on is driven by precision, innovation, and a commitment to delivering beyond expectations. Whether you need a complete product from scratch or expert development support, we are your trusted partner for future-ready software solutions. less -
Hire mazharsahil12
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, TypeScript, C#, .NET Core, ASP.NET MVC, ASP.NET Web API, PHP, Lavavel, Entity Framework, signalR, RabbitMQ, MassTransit, Kubernetes ➡️ Frontend & Web: React, Next.js, Redux, Vue.js, Angular JS, Material UI, Semantic UI, Tailwind CSS, responsive UI development, PSD, HTML, CSS, Bootstrap, Wordpress, Wix ➡️ Mobile: React Native & Flutter 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, Auth 2.0, Identity Server, role-based access control ➡️ Cloud & DevOps: AWS, Azure, Docker, CI/CD pipelines, environment configuration, logging & monitoring ➡️ AI & ML Tools: GPT-3.5/4/5.5, OpenAI, LangChain, Whisper, ElevenLabs, Huggingface, Stable Diffusion, TensorFlow, Pandas, NumPy, and chatbot development (text + voice). ➡️ Automation & Integration: Web scraping, workflow automation, API integration, Airtable, Notion, Google Sheets, FastAPI, and trading bots (Pine Script), Stripe, PayPal, third-party APIs, webhooks. ➡️ Servers: Dedicated, Shared, VPS, Private Servers ➡️ Design: UI / UX Design, Photoshop, Adobe XD, Figma, Sketch, InVision 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 ❇️ WHAT YOU CAN EXPECT ❇️ ➔ Daily Communication With Quick Replies To Messages ➔ Daily Work Update Report On Worked Things Of That Day ➔ Bug-Free Work With Proper Testing As I Know That Client Is Not Tester ➔ Guaranteed Work ➔ Ongoing Support As Needed Bases Sounds interesting? Let's have a quick Freelancer call/chat to discuss your project. less -
Hire MinaMaroufIt
I build custom software solutions for startups, growing businesses, and modern companies that need reliable, scalable, and results-driven technology. With 7+ years of experience, I help clients create and improve digital products across AI, SaaS, web, mobile, eCommerce, automation, and backend systems. I support...I build custom software solutions for startups, growing businesses, and modern companies that need reliable, scalable, and results-driven technology. With 7+ years of experience, I help clients create and improve digital products across AI, SaaS, web, mobile, eCommerce, automation, and backend systems. I support projects from planning and architecture to development, testing, deployment, and ongoing improvement. Here are my key skills: ✔️ AI & LLM Development | AI Applications | Prompt Engineering | Intelligent Automation | AI Workflows ✔️ SaaS Platform Development | Scalable Architecture | Multi-tenant Systems | Admin Panels | Subscription Systems ✔️ Full-Stack Development | Web Applications | Frontend & Backend | REST APIs | Responsive Systems ✔️ Backend Engineering & System Design | API Development | Microservices | Database Design | System Architecture ✔️ Automation & Workflow Optimization | Business Automation | Process Optimization | API Integrations ✔️ eCommerce Solutions | Shopify | WooCommerce | WordPress | Custom Integrations ✔️ Performance Optimization | Debugging | Bottleneck Fixing | Code Refactoring | System Stability ✔️ Cloud & Deployment | AWS | Scalable Hosting | Deployment Pipelines ✔️ Third-Party Integrations | Payment Gateways | CRMs | External APIs | Webhooks ✔️ Dashboards & Admin Systems | Reporting Tools | Analytics Dashboards | Internal Systems ✔️ Product Development Lifecycle | MVP Development | Testing | Deployment | Scaling ✔️ Code Quality & Maintainability | Clean Code | Documentation | Long-Term Scalability I help clients launch faster, automate workflows, and build dependable products that scale. I believe strong products come from clear communication, practical engineering, and consistent execution. My goal is to deliver solutions that are not only functional but dependable, maintainable, and ready for real business growth. less -
Hire alfatrade2
Senior Backend Developer with 10 years of hands-on experience building scalable, production-ready systems. I specialize in Java 21, Spring Boot 3, and microservices architecture. What I deliver: - REST API development and integration - Microservices architecture design and implementation - Database design and...Senior Backend Developer with 10 years of hands-on experience building scalable, production-ready systems. I specialize in Java 21, Spring Boot 3, and microservices architecture. What I deliver: - REST API development and integration - Microservices architecture design and implementation - Database design and optimization (PostgreSQL, MySQL) - Bug fixing and code refactoring - Docker containerization and deployment - Message-driven systems with Apache Kafka My current stack: Java 21, Spring Boot 3.3, PostgreSQL, Kafka, Redis, Docker, Keycloak, Gradle/Maven Why work with me: - I build and maintain a 30-microservice e-commerce platform from scratch - Clean code, clear communication, on-time delivery - Available for both small tasks and long-term projects - Fast response time — usually within 1-2 hours I focus on writing maintainable, well-tested code that works in production. Let's discuss your project — I'm ready to start immediately. Also experienced in architectural design, structural calculations, and aluminum window/door systems for residential and industrial projects. Full documentation with CAD drawings, specifications, and load calculations. less -
Hire ska234
Thank you for visiting my profile. I am an AI Developer with over ten years of professional experience in software engineering. I began my career as a Full Stack Web and Mobile Engineer, working extensively with technologies such as JavaScript, TypeScript, React, C#, Python, and modern backend and cloud platforms,...Thank you for visiting my profile. I am an AI Developer with over ten years of professional experience in software engineering. I began my career as a Full Stack Web and Mobile Engineer, working extensively with technologies such as JavaScript, TypeScript, React, C#, Python, and modern backend and cloud platforms, and I have successfully delivered scalable web and mobile applications across industries including business, education, e-commerce, and enterprise environments. In recent years, my professional focus has shifted fully toward the artificial intelligence field, where I have built strong, hands-on expertise designing and deploying production-ready AI solutions. I specialize in developing AI-powered systems such as intelligent chatbots, AI agents, and virtual assistants using GPT and modern large language models. My experience includes advanced prompt engineering, fine-tuning and training machine learning models, retrieval-augmented generation (RAG), vector databases, embeddings, semantic search, and contextual memory systems. I design and implement end-to-end AI workflows using frameworks such as LangChain, integrating AI capabilities seamlessly into real-world products and business processes. I also develop AI-driven automation systems, including intelligent bots and workflows for platforms such as WhatsApp, Slack, and Telegram, as well as scalable business automation solutions using tools like n8n and Zapier to improve efficiency and customer engagement. My background as a full-stack engineer allows me to build AI solutions that are not only intelligent but also reliable, secure, and scalable. I am highly experienced in deploying AI systems to cloud environments such as AWS, Google Cloud Platform, and Firebase, and in integrating AI services into web and mobile applications. In addition, I work with AI-enhanced Web3 and blockchain solutions, including smart contracts, decentralized applications, AI-assisted trading bots, and automation within Ethereum, EVM-based ecosystems, and Solana. I am committed to delivering high-quality AI solutions with clear communication, timely delivery, and long-term technical support. If you are looking for an AI developer with a strong engineering foundation and proven AI expertise, please feel free to send me a private message to discuss your project. less -
Hire lazarr4
Thank you for taking the time to view my profile. I enjoy seeing the things I build actually help people, and that is one of the main reasons I’ve continued working in this field. For over 7 years, I’ve been involved in developing e-commerce websites using Shopify and WordPress, as well as SaaS products and various...Thank you for taking the time to view my profile. I enjoy seeing the things I build actually help people, and that is one of the main reasons I’ve continued working in this field. For over 7 years, I’ve been involved in developing e-commerce websites using Shopify and WordPress, as well as SaaS products and various web-based systems. What I Can Help With ✅ Full-Stack Web Development ✅ SaaS & Business Software Development ✅ Custom Web Application Development ✅ Shopify Development ✅ WordPress & WooCommerce Development ✅ E-Commerce Platform Development ✅ Marketplace & Multi-Vendor Platform Development ✅ Frontend Engineering & UI/UX ✅ Backend & API Engineering ✅ Database Design & Data Engineering ✅ AI, LLM & Intelligent Automation ✅ AI Agent & RAG System Development ✅ Machine Learning & Data-Driven Applications ✅ Mobile Application Development ✅ Android & iOS App Development ✅ Cross-Platform App Development ✅ Cloud Computing & Cloud Application Development ✅ DevOps & CI/CD Automation ✅ Server Administration & Deployment ✅ Microservices & Distributed Systems ✅ System Architecture & Technical Consulting ✅ API Integration & Third-Party Services ✅ Business Process Automation ✅ Web Scraping & Data Extraction ✅ Payment Gateway & Subscription Integration ✅ CRM, ERP & Business Management Systems ✅ Booking & Reservation System Development ✅ Real-Time Application Development ✅ Database Optimization & Performance Tuning ✅ Website Migration & System Modernization ✅ Legacy System Maintenance & Upgrades ✅ Cybersecurity & Application Security ✅ Website Performance Optimization ✅ Technical SEO & Digital Growth Optimization ✅ Analytics & Business Intelligence Dashboards ✅ Custom CMS Development ✅ Headless Commerce & Headless CMS ✅ Progressive Web App (PWA) Development ✅ Software Testing & Quality Assurance ✅ Automated Testing & Debugging ✅ API Documentation & Technical Integration ✅ Maintenance, Support & Continuous Improvement ✅ MVP Development & Product Prototyping ✅ Custom Software Solutions & Digital Transformation Once a website or system is actually being used, you start to notice things that weren’t obvious during development. “Is this really easy to understand?” “Why does this have to be done manually every time?” “Couldn’t this be made simpler?” I really enjoy finding these small pain points, improving them one by one, and seeing how the experience gets better each time. Even at that scale, I still find it incredibly rewarding to see the systems I’ve built make someone’s work easier and contribute to the steady growth of their business. Even if you’re simply thinking, “I’m not sure what I need to build yet,” that’s completely fine. I’ll listen, ask the right questions, and work through the possibilities with you. Being able to watch a client’s business grow while continuing to grow alongside them is, for me, one of the most rewarding parts of this work. less -
Hire Fazeennazar
Thank you for visiting my profile. I am very pleasure to help you with my programming services I have been as a senior engineer for more than 7 years. Here is my skill sets for you. ★ Back End : Python/Django/DRF/Go/Node.js/Express.js/Nest.js/Laravel ★ Front End : React.js / Next.js / Vue.js / Nuxt.js ★ ...Thank you for visiting my profile. I am very pleasure to help you with my programming services I have been as a senior engineer for more than 7 years. Here is my skill sets for you. ★ Back End : Python/Django/DRF/Go/Node.js/Express.js/Nest.js/Laravel ★ Front End : React.js / Next.js / Vue.js / Nuxt.js ★ DataBase : MySQL/PostgreSQL/MongoDB/DynamoDB ★ Low & No Code : Bubble.io / Flutter Flow / App Master ★ WebScraping : Beautifulsoup, Selenium, urllib, Scapy ★ OpenCV : Object Detection and Image Processing.... ★ Data Analysis & Data Visualization : Pandas, Seaborn, Numpy, Matplotlib ★ ML and AL : Pytorch, Tensorflow, Keras, DNN, GAN, CNN, Sklearn ★ Other Tools : QuickBook, Power BI, Tableau , Plotly , Bokeh DashBoard I can spend my full time on freelancer and serve in real time for all days. Best Result will be delivered on Time and on Budget. Let's build the great relationship and go forward the success of your project. Best Regards less -
Hire ricvincip
I've been working as software engineer for 9 years, focusing on developing scalable system with high maintainability.I've been working as software engineer for 9 years, focusing on developing scalable system with high maintainability. less -
Hire daxm0
I'm a passionate Full Stack & AI Automation & GoHighLevel Engineer with over 6+ years of experience building scalable web applications, intelligent automation systems, and high converting CRM solutions. I enjoy turning complex business ideas into reliable, user friendly products that help companies save time,...I'm a passionate Full Stack & AI Automation & GoHighLevel Engineer with over 6+ years of experience building scalable web applications, intelligent automation systems, and high converting CRM solutions. I enjoy turning complex business ideas into reliable, user friendly products that help companies save time, increase revenue, and grow with confidence. Here's my verified engineer certification from micro1 if it's useful: https://micro1-portal-data.s3.amazonaws.com/engineer-certificates/1773364295-bd1a6393-4721-4f9d-9bd0-b3f891454c01.jpg My expertise covers the complete development lifecycle, from planning and UI implementation to backend architecture, cloud deployment, automation, and long term maintenance. Whether it's building a SaaS platform, creating AI powered assistants, or designing advanced CRM workflows, I focus on delivering secure, scalable, and production ready solutions. Full Stack Development React.js, Next.js, Vue.js, Angular TypeScript, JavaScript Node.js, Express.js, NestJS Python, FastAPI HTML5, CSS3, Tailwind CSS, Bootstrap REST API, GraphQL PostgreSQL, MySQL, MongoDB, Prisma Firebase, Supabase AWS, Vercel, Docker, CI/CD AI & Automation OpenAI, Claude, Gemini AI Chatbots and Virtual Assistants AI Agent Development RAG Systems Prompt Engineering Workflow Automation n8n, Make.com, Zapier AI Content Generation AI Voice Agents OCR and Document Processing Email Automation GoHighLevel Expertise CRM Setup and Customization Sales Pipelines Marketing Automation Lead Capture Funnels Calendar Booking SMS and Email Campaigns Workflow Automation Custom API Integration Stripe Integration Twilio Integration Reporting and Dashboard Creation Integrations Stripe PayPal Twilio Mailgun Resend SendGrid Google APIs Meta APIs OpenAI APIs HubSpot Zoho CRM Salesforce Jira Slack Discord Shopify WooCommerce What I Deliver SaaS Applications AI Powered Business Solutions CRM Automation Systems Business Process Automation Modern Responsive Websites Custom Dashboards API Development and Integration Secure Authentication Systems High Performance Web Applications Scalable Cloud Solutions I believe great software should be fast, intuitive, and easy to maintain. My goal is to build solutions that solve real business challenges while creating an outstanding experience for both users and administrators. I value clean code, clear communication, and long term partnerships, ensuring every project is delivered with quality, reliability, and attention to detail. less
