OAuth Developers For Hire
Showing 54 results
Sponsored Freelancers
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Hire Herculesz
Principal / Head AI Engineer with 25+ years of experience architecting and scaling complex software systems, now specializing in Large Language Models (LLMs), agentic workflows, and AI-first product development. Proven expertise in integrating OpenAI APIs, building RAG pipelines, and deploying scalable,...Principal / Head AI Engineer with 25+ years of experience architecting and scaling complex software systems, now specializing in Large Language Models (LLMs), agentic workflows, and AI-first product development. Proven expertise in integrating OpenAI APIs, building RAG pipelines, and deploying scalable, production-grade LLM features using LangChain, pgvector, Pinecone, and related technologies. Hands-on leader with a track record of transforming business workflows through intelligent systems—semantic search, AI copilots, and conversational agents—while maintaining rigorous engineering standards across DevOps, observability, and frontend/backend architecture. Deep experience in embedding optimization, prompt engineering, fine-tuning GPT models, and delivering generative AI(GenAI) products that drive measurable impact. Skilled in mentoring engineers, leading cross-functional AI initiatives, and aligning technical strategy with executive goals in fast-paced, innovation-driven environments. Passionate about building the next generation of human-centered AI systems. less -
Hire pankajgarg86
Top 1% Preferred Freelancer (Based on Platform Ranking) I am a Professional Full-Stack Developer with over 10+ years of experience delivering scalable, high-performance web and application solutions. I focus on clean architecture, performance optimization, and long-term maintainability. My goal is not just to...Top 1% Preferred Freelancer (Based on Platform Ranking) I am a Professional Full-Stack Developer with over 10+ years of experience delivering scalable, high-performance web and application solutions. I focus on clean architecture, performance optimization, and long-term maintainability. My goal is not just to complete a project, but to build solutions that exceed expectations and support business growth. 💻 Technical Skills Microsoft Stack: .NET Core | ASP.NET MVC | C# | Entity Framework | EF Core | Dapper | Web API | WPF | WCF | ABP.IO | Azure | AWS Frontend & JavaScript: JavaScript | jQuery | AngularJS | Vue.js | Node.js | Express.js | Kendo UI | Telerik | DevExpress | HTML5 | CSS3 | Bootstrap Integrations: Payment Gateway Integration | Google API Integration | Twilio API | RESTful API Development CMS & Platforms: WordPress | Laravel | Shopify | Squarespace 🗄 Databases MS SQL Server | MySQL | PostgreSQL | Oracle | MongoDB | NoSQL | Microsoft Access 💡 What Makes Me Different • 10+ years experience in production systems • Top 1% on Freelancer • 100% On-Time & On-Budget • Clean, documented, maintainable code • Strong ownership mindset I don’t just complete tasks — I solve root problems. If you need stability, performance, and reliability, let’s discuss your project. less -
Hire taraskkorol
I build modern web applications and AI-powered SaaS products from idea to production. My focus is creating reliable, scalable systems that are easy to maintain and ready for real users. I work across frontend, backend, APIs, and AI integrations, helping startups and businesses turn concepts into working products...I build modern web applications and AI-powered SaaS products from idea to production. My focus is creating reliable, scalable systems that are easy to maintain and ready for real users. I work across frontend, backend, APIs, and AI integrations, helping startups and businesses turn concepts into working products quickly and cleanly. What I can help with: • Full-stack web development • AI features and automation • SaaS architecture and MVP builds • API integrations and performance optimization - Mobile App development with AI Integration I value clear communication, realistic timelines, and delivering solutions that actually solve business problems. less -
Hire dmytrobenko
Highly motivated and detail-oriented professional with a strong background in problem-solving. Good team player as well as good at working alone; very sociable. Hardworking and responsible for projects and tasks. Eager to learn a lot of new information and skills every single dayHighly motivated and detail-oriented professional with a strong background in problem-solving. Good team player as well as good at working alone; very sociable. Hardworking and responsible for projects and tasks. Eager to learn a lot of new information and skills every single day less -
Hire yuriihal
Hello! I’m a No-Code & Automation Engineer with a strong background in backend development, cloud infrastructure, and system design. I specialize in building scalable automation systems that eliminate manual work, improve efficiency, and help businesses operate faster and smarter. I combine no-code tools with...Hello! I’m a No-Code & Automation Engineer with a strong background in backend development, cloud infrastructure, and system design. I specialize in building scalable automation systems that eliminate manual work, improve efficiency, and help businesses operate faster and smarter. I combine no-code tools with engineering-level thinking to design reliable, production-ready workflows and integrations tailored to real business needs. 🔧 Services I Offer |- End-to-End Workflow Automation (Zapier / Make / n8n) ||- Multi-step automations with logic, conditions, and error handling |||- Webhook-based systems & event-driven workflows |- API Integrations & System Connections ||- REST APIs, JSON handling, OAuth / API key authentication |||- Custom integrations between SaaS platforms |- Internal Tools & Data Systems ||- Airtable / Notion / Google Sheets as databases |||- Data pipelines, syncing, and transformation |- Business Process Automation ||- CRM automation (HubSpot, Salesforce) |||- Email workflows (Resend, Mailchimp) |||- Payment automation (Stripe) |- Cloud & Backend Support ||- AWS (Lambda, S3, API Gateway, SQS) |||- Serverless workflows & scalable backend logic |- AI & GenAI Integrations ||- OpenAI / LangChain / Hugging Face |||- AI-powered workflows, content processing, automation 🧠 My Approach I focus on building systems that are: • Scalable → ready to grow with your business • Reliable → proper error handling & monitoring • Maintainable → clean structure and documentation • Efficient → reducing manual work and costs I don’t just connect tools — I design complete systems that work seamlessly in real-world conditions. 💡 Why Work With Me • Strong engineering background (not just no-code user) • Experience with cloud, APIs, and scalable architectures • Focus on real business impact, not just automation setup • Clear communication and fast execution 🤝 Let’s Work Together If you’re looking to automate your processes, integrate your tools, or build a scalable no-code system — I can help. less -
Hire danielu39
I help startups and enterprise teams turn complex ideas into production-ready SaaS platforms & App Services. I have been successfully operating as an independent consultant for over 13 years, and I have implemented and deployed many successful Software Solutions for my clients, as well as delivered in-depth analyses...I help startups and enterprise teams turn complex ideas into production-ready SaaS platforms & App Services. I have been successfully operating as an independent consultant for over 13 years, and I have implemented and deployed many successful Software Solutions for my clients, as well as delivered in-depth analyses that uncover actionable insights to streamline operations and sharpen strategic decisions across their organizations. Premium UX/UI Designer & E-Commerce Specialist with expertise in luxury brand aesthetics, conversion-focused design, and SEO optimization. Experienced in creating modern, high-performing online stores with intuitive user experiences, strong visual storytelling, and mobile-first responsive design for fashion and lifestyle brands. Industries Worked For: Telecom, Entertainment, Retail, Supply Chain, Agri-tech, Healthcare, Finance, Real estate etc. I have worked in the past for clients from accross the world (Esp: United States, Middle East, United Kingdom, Australia, Singapore). Services Provided: 🌟Software Product Strategy, 🌟SAAS Product Development, 🌟Enterprise architecture, 🌟Solution/ Technical/ Cloud Architecture, 🌟AI Product Management less -
Hire matheussilva114
As a Senior full stack software dev, Data Scientist and AI/ML Engineer, I specialize in developing, and deploying Software Products with good machine learning solutions. I operate as a deeply full stack engineer across the entire technology spectrum building and integrating web platforms, game engines, blockchain...As a Senior full stack software dev, Data Scientist and AI/ML Engineer, I specialize in developing, and deploying Software Products with good machine learning solutions. I operate as a deeply full stack engineer across the entire technology spectrum building and integrating web platforms, game engines, blockchain systems, and generative AI solutions, from core infrastructure and backend logic to user experiences and intelligent automation. less -
Hire akhileshtiwari23
akhileshtiwari23 akhileshtiwari23
$15 USD / hour
Full Stack Flutter Architect | SaaS & AI ExpertIndiaI transform complex business ideas into scalable, production-ready digital products. With 11+ years of experience, I provide the high-level technical oversight and hands-on execution required for elite-level software development. When you hire me, you are getting a senior partner dedicated to your product's...I transform complex business ideas into scalable, production-ready digital products. With 11+ years of experience, I provide the high-level technical oversight and hands-on execution required for elite-level software development. When you hire me, you are getting a senior partner dedicated to your product's architectural integrity and long-term success. 🚀 Why Partner With Me? Senior Execution: I have successfully launched over 20+ applications across global markets, specializing in high-load SaaS, AI-driven dashboards, and complex IoT ecosystems. End-to-End Ownership: From crafting high-fidelity Figma prototypes to deploying robust Flutter frontends and scalable Node.js backends, I manage the entire lifecycle of your project. Stability Guaranteed: 100% on-time/on-budget delivery record. I provide 30 days of complimentary post-launch support to ensure your system remains flawless. 🛠 Specialized Tech Stack: Mobile: Flutter (Expert), React Native, iOS/Android Native. Backend & API: Node.js, Nest.js, GraphQL, PostgreSQL, MongoDB. Intelligence: OpenAI Integration, Custom AI Dashboards, Real-time Data Analytics. Design: Professional UI/UX Design in Figma focused on user retention. 💡 The Professional Advantage: I operate with the precision of a software architect and the speed of a seasoned developer. My goal is to minimize your technical debt and maximize your ROI through clean, maintainable code and transparent communication. Play Store: Jungle Padel: https://play.google.com/store/apps/details?id=com.jungle.padel&pli=1 (Real-time court booking) Bow & Beautiful: https://play.google.com/store/apps/details?id=com.bowAndBeautiful.admin (Admin dashboard) App Store: Jungle Padel: https://apps.apple.com/cl/app/jungle-padel/id6445810648 (Full-stack Flutter sports app) Glamiris: https://apps.apple.com/ca/app/glamiris/id1572687679 (AI-driven salon SaaS) Ready to build? Let’s schedule a strategy session to discuss your project requirements and technical roadmap. less -
Hire extreamcode
Please visit my full portfolio: https://divulgetechnologies.com/ **Welcome to my profile!** **"30-Day Guarantee with Full Support Coverage After Project Completion!"** I’m a full-stack developer with 15+ years of experience delivering **web, mobile, and scalable digital solutions**. I provide end-to-end development,...Please visit my full portfolio: https://divulgetechnologies.com/ **Welcome to my profile!** **"30-Day Guarantee with Full Support Coverage After Project Completion!"** I’m a full-stack developer with 15+ years of experience delivering **web, mobile, and scalable digital solutions**. I provide end-to-end development, from idea to deployment and optimization. ### **Core Expertise** • Website & Web App Development (Custom + CMS) • Mobile App Development (Flutter – Android/iOS) • Backend Development (PHP, MySQL, Python) • AI / ChatGPT Integrations • API Development & Third-Party Integrations • Website Security & Speed Optimization • Analytics & Conversion Tracking ### **Tech Stack** • LAMP, MERN, Python • React JS, Bootstrap, Tailwind • HTML5, CSS3, JavaScript, jQuery • CakePHP ### **Mobile Development** • Flutter cross-platform apps • API-driven mobile solutions • MVP development for startups ### **E-commerce** • Shopify, WooCommerce, Magento • OpenCart, PrestaShop, CS-Cart, WHMCS • Amazon, eBay integrations • Custom checkout, payment gateways ### **CMS Platforms** • WordPress, Webflow, Wix, Squarespace • Framer, Base44, Loveable,odoo ### **API Integrations** • REST APIs (custom & third-party) • PayPal, Stripe, WhatsApp, Twilio • Google, Facebook, YouTube APIs ### **SEO & Marketing** • Technical SEO optimization • Google/Facebook/Instagram Ads • Analytics implementation ### **Content & Creative** • Website content & landing page copy • Article/blog writing • Basic graphic design & AI image generation ### **What You Get** • Clean, responsive, high-performance solutions • Scalable architecture & secure systems • Business-focused development approach • 1-month free support after delivery I focus on **quality, performance, and long-term reliability**. Let’s build something impactful 🚀 less -
Hire TheSecondSource
Second Source is a technology and marketing services company with a distributed team of 60+ experienced professionals, supporting startups, agencies, and growing businesses worldwide. Our focus is not just on completing tasks, but on owning outcomes, timelines, and quality. Unlike single freelancers, we provide...Second Source is a technology and marketing services company with a distributed team of 60+ experienced professionals, supporting startups, agencies, and growing businesses worldwide. Our focus is not just on completing tasks, but on owning outcomes, timelines, and quality. Unlike single freelancers, we provide continuity, scalability, and accountability. Clients work with a single point of contact, backed by a specialized internal team, ensuring smooth communication and reliable execution even on long-term or multi-skill projects. 🔹 CORE SERVICES (TIGHTENED & PROFESSIONAL) Software & Web Development ✅Custom Web Applications (Laravel, PHP, ASP.NET) ✅WordPress, Shopify & Magento Solutions ✅Admin Panels, Dashboards & APIs ✅Scalable Database Design & Management Mobile App Development ✅Android & iOS Applications ✅Flutter (Cross-Platform) ✅Backend & Web Services Integration UI/UX & Design ✅High-converting Landing Pages ✅PSD/Figma to HTML ✅Brand-aligned Website & Newsletter Design Business Automation & Data ✅Excel Automation (Formulas, VBA, Macros) ✅Data Analysis & Workflow Optimization Marketing Services & Digital Growth ✅SEO (On-Page & Off-Page) ✅Performance-focused Website Optimization ✅Technical SEO for Web Apps ✅Graphics Design ✅Video Editing ✅Digital Ads - Meta, Tiktok, google and LinkedIn less
