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Hire the Best OAuth Developers in Sydney, NSW

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waseem S.

Sydney, Australia

$30/hr
4.7
23 jobs

๐ŸŽฏ 12+ Years of Expertise | Web & Mobile Development | AI/ML Engineering | RAG & AI Agents | Scalable SaaS & Custom Solutions Welcome! I lead a multidisciplinary team of expert Web & Mobile Developers, AI/ML Engineers, and UI/UX Designers delivering powerful, scalable, and user-focused digital solutions. We specialize in cross-platform app development, AI-powered systems, and end-to-end product delivery for startups, enterprises, and innovative businesses worldwide. โœ… ๐–๐ก๐š๐ญ ๐–๐ž ๐Ž๐Ÿ๐Ÿ๐ž๐ซ โ€“ ๐‚๐จ๐ซ๐ž ๐’๐ž๐ซ๐ฏ๐ข๐œ๐ž๐ฌ ๐Ÿ’ป ๐–๐ž๐› ๐ƒ๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ฆ๐ž๐ง๐ญ Full-stack development using React, Next.js, Node.js, NestJS, Express SEO-optimized, mobile-first, and high-performance websites and web apps Admin dashboards, SaaS platforms, multi-tenant architectures ๐Ÿ“ฑ ๐Œ๐จ๐›๐ข๐ฅ๐ž ๐€๐ฉ๐ฉ ๐ƒ๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ฆ๐ž๐ง๐ญ Cross-platform iOS & Android apps using React Native Smooth UX, native-like performance, and App Store / Google Play publishing Real-time features, GPS, camera access, media sharing, offline support ๐Ÿค–๐€๐ˆ/๐Œ๐‹ ๐’๐จ๐ฅ๐ฎ๐ญ๐ข๐จ๐ง๐ฌ & ๐‚๐จ๐ง๐ฏ๐ž๐ซ๐ฌ๐š๐ญ๐ข๐จ๐ง๐š๐ฅ ๐€๐ ๐ž๐ง๐ญ๐ฌ RAG (Retrieval-Augmented Generation) systems using OpenAI, LangChain, Pinecone AI Agents with Memory for personalized user experiences and task automation Custom AI/ML model integration, embeddings, fine-tuning, and LLM orchestration Chatbots & Virtual Assistants with contextual awareness and human-like interaction Rapid prototyping and deployment using Replit, Docker, and AWS ๐Ÿ›’ ๐„-๐‚๐จ๐ฆ๐ฆ๐ž๐ซ๐œ๐ž & ๐Œ๐š๐ซ๐ค๐ž๐ญ๐ฉ๐ฅ๐š๐œ๐ž ๐ƒ๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ฆ๐ž๐ง๐ญ Custom online stores, subscription models, payment gateway integration Inventory management, order tracking, and dynamic product catalogs ๐Ÿฅ ๐‡๐ž๐š๐ฅ๐ญ๐ก๐œ๐š๐ซ๐ž, ๐–๐ž๐ฅ๐ฅ๐ง๐ž๐ฌ๐ฌ & ๐…๐ข๐ญ๐ง๐ž๐ฌ๐ฌ ๐€๐ฉ๐ฉ๐ฌ HIPAA/GDPR-compliant platforms for telemedicine, fitness, appointment scheduling Wearable integrations, health tracking, mental wellness & meditation tools ๐Ÿง ๐๐š๐œ๐ค๐ž๐ง๐, ๐ƒ๐š๐ญ๐š๐›๐š๐ฌ๐ž๐ฌ & ๐€๐๐ˆ๐ฌ Scalable backend architecture with Firebase, PostgreSQL, MongoDB, MySQL Real-time syncing, API integrations, and secure data handling โš™๏ธ๐‚๐ฎ๐ฌ๐ญ๐จ๐ฆ ๐…๐ž๐š๐ญ๐ฎ๐ซ๐ž๐ฌ ๐–๐ž ๐๐ฎ๐ข๐ฅ๐ ๐Ÿ’ณ Payment Systems (Stripe, PayPal, Apple Pay, Google Pay) ๐Ÿ” Authentication & Security (JWT, OAuth, biometrics) ๐Ÿ”” Push Notifications, Alerts & In-app Messaging ๐Ÿ“ž Real-Time Chat, Audio & Video Calls (WebRTC, Twilio, Agora) ๐Ÿ“ฒ WhatsApp, Social Media & CRM Integrations ๐ŸŒ Multi-language Support & Localization ๐Ÿ“ GPS & Maps Integration ๐Ÿ“Š Analytics Dashboards with Custom Insights โญ Ratings & Review Systems ๐Ÿ“ฆ Inventory & Order Management ๐Ÿงพ PDF Invoice & Receipt Generation ๐Ÿš€ CI/CD Deployment, Cloud Hosting, App Store Submission ๐Ÿ’ก๐–๐ก๐ฒ ๐‚๐ฅ๐ข๐ž๐ง๐ญ๐ฌ ๐‚๐ก๐จ๐จ๐ฌ๐ž ๐”๐ฌ โœ” 12+ years of proven experience in Web, Mobile & AI/ML Development โœ” Delivered 100+ successful digital products across multiple industries โœ” Strong focus on intuitive UI/UX and performance optimization โœ” Expert in building both MVPs and complex, scalable systems โœ” Seamless project communication and milestone-based delivery โœ” Post-launch support, maintenance, and long-term partnerships ๐Ÿง  ๐“๐ž๐œ๐ก ๐’๐ญ๐š๐œ๐ค & ๐“๐จ๐จ๐ฅ๐ฌ Frontend: React, React Native, Next.js, Tailwind, Redux, TypeScript Backend: Node.js, NestJS, Express, Firebase, MongoDB, PostgreSQL, MySQL AI/ML: OpenAI, Hugging Face, LangChain, AutoGen, FAISS, Pinecone, Weaviate Cloud & DevOps: AWS, Docker, GitHub Actions, Replit, CI/CD Pipelines AI Agent Frameworks: Multi-agent systems, Task automation, Context memory Tools: Figma, Jira, Notion, Trello, Slack ๐Ÿš€ ๐‹๐ž๐ญโ€™๐ฌ ๐๐ฎ๐ข๐ฅ๐ ๐˜๐จ๐ฎ๐ซ ๐๐ž๐ฑ๐ญ ๐๐ข๐  ๐ˆ๐๐ž๐š Whether you're looking to: Build a cross-platform mobile app Launch a custom SaaS platform Develop a conversational AI agent or RAG-powered assistant Modernize an enterprise system or streamline internal workflows Weโ€™ve got you covered from idea to launch and beyond. ๐Ÿ“Œ ๐‹๐ž๐ญโ€™๐ฌ ๐œ๐จ๐ง๐ง๐ž๐œ๐ญ ๐š๐ง๐ ๐ญ๐ฎ๐ซ๐ง ๐ฒ๐จ๐ฎ๐ซ ๐ฏ๐ข๐ฌ๐ข๐จ๐ง ๐ข๐ง๐ญ๐จ ๐š ๐ก๐ข๐ ๐ก-๐ฉ๐ž๐ซ๐Ÿ๐จ๐ซ๐ฆ๐ข๐ง๐  ๐๐ข๐ ๐ข๐ญ๐š๐ฅ ๐ฉ๐ซ๐จ๐๐ฎ๐œ๐ญ.

  • React Native
  • API Integration
  • Web Application
  • Database
  • Web Development
  • Mobile App Development
  • UI/UX Prototyping
  • Artificial Intelligence
  • Machine Learning
  • Natural Language Processing
  • Web Application Development
  • Machine Learning Model
  • AI Model Training
  • AI Model Training Prompt
  • Model Training Prompt Engineering
Prashant T.

Sydney, Australia

$80/hr
4.9
7 jobs

Hi! Iโ€™m a Sydney-based Backend Developer (AEST) specialising in Python, Django/DRF, FastAPI and system integrations. I help startups, clinics and businesses build reliable APIs, automate workflows and fix complex backend issues quickly. Iโ€™ve worked across startups, enterprise systems and global platforms: building scalable APIs, optimising databases and integrating third-party services. My focus is always on clean architecture, performance and long-term maintainability. What Iโ€™m great at 1. Backend development (Django, DRF, FastAPI) 2. Building & optimizing REST APIs 3. Database design and performance tuning (PostgreSQL, MongoDB) 4. Workflow automation (Zapier, Make, custom Python scripts) 5. Integrations with booking systems, CRMs, payment gateways 6. AWS, DigitalOcean, Linux servers (deployment & maintenance) 7. Building secure auth systems (JWT, OAuth, sessions) 8. Writing unit/integration tests for reliable releases What you can expect: 1. Based in Sydney โ†’ smooth communication in AEST 2. Fast responses and clear communication 3. Production-quality code with documentation 4. Ability to work independently or collaborate with teams 5. Flexible for short-term gigs or long-term backend support Whether you need a backend built from scratch, an automation fixed, an integration implemented or a performance issue solved, I can jump in and deliver fast, reliable results. Letโ€™s discuss your project, I can start immediately.

  • PostgreSQL
  • Python
  • JavaScript
  • Django
  • Git
  • Ubuntu
  • Finance
  • Statistics
Bharat D.

Sydney, Australia

$60/hr
5.0
25 jobs

I build production-grade web applications and backend systems that scale โ€” and I have the metrics to back it up. Over 5 years I've shipped full-stack systems across SaaS, logistics, and AI platforms. At PortPro, a drayage SaaS serving thousands of drivers across the US, I cut Mapbox API costs from $12K to $1.5K/month by architecting an intelligent caching layer, reduced database storage by 88% (700GB โ†’ 80GB) via a TimescaleDB migration, and led a team of 5 engineers to maintain 99.9% production uptime. Currently at Arrow Transport in Sydney, I'm building an enterprise logistics platform on .NET Core, React, and AWS ECS handling Australia-wide operations. On Upwork, I've delivered 15+ projects with a 100% Job Success Score and Top Rated Plus status โ€” including a GPU-accelerated AI video generation SaaS (Produce.so), an AI companionship app backend (Frankie AI), and a Paddle-integrated property management platform (Host & Guest). What I build: โ€” Full-stack web applications: React, Next.js, TypeScript, Node.js, NestJS โ€” Backend systems and REST/GraphQL APIs: PostgreSQL, MongoDB, Redis โ€” Cloud infrastructure: AWS (ECS, Lambda, S3, CloudWatch), Docker, Kubernetes โ€” AI integrations: OpenAI API, Claude API, LangGraph, RAG pipelines โ€” Async processing: BullMQ, FFmpeg video pipelines, webhook systems โ€” Auth and payments: JWT, OAuth2, Stripe, Paddle, Apple Pay, Google Pay I'm based in Sydney, Australia (AEST) and available 30โ€“40 hours per week. If you need someone who writes clean, documented code and communicates clearly throughout โ€” let's talk.

  • Node.js
  • React
  • TypeScript
  • Next.js
  • NestJS
  • API Integration
  • PostgreSQL
  • Amazon Web Services
  • MongoDB
  • Docker
  • JavaScript
  • Redis
  • Python
  • ExpressJS
  • API Development
  • REST API
Adil Saleem B.

Sydney, Australia

$25/hr
5.0
2 jobs

๐ŸŽ I guarantee a full refund if I fail to meet your expectations or deliver as promisedโ€”no excuses, no questions asked! 100% Customer Satisfaction ๐ŸŒŸ | BS In Software Engineering ๐Ÿ‘จโ€๐ŸŽ“ | MS in Data Science I'm Adil Saleem, I specialized in full stack web and mobile application development. Involved in solution designing, developing, deploying, testing, and debugging of large-scale applications. Tech Stack: -------------- โœ… Frontend: React Js, Next Js, Typescript, MUI Components, AntD, React Native, jQuery, Bootstrap, Tailwind css, HTML5/CSS3, UI/UX, Media Queries, GSAP, ThreeJS โœ… Backend: Node Js, Express JS, Next Js, JWT, Authorization, OAuth, GraphQL โœ… Mobile App: React-Native, iOS, Android โœ… DevOps/Cloud: Docker , Kubernetes, AWS (EC2, EKS, ECS, VPC, S3, API Gateway, Lambda, Load Balancers) Github Actions , Jenkins, CI / CD , Serverless, Terraform, API Gateway โœ… Databases: AWS Dynamo DB, SQL Server, PostgreSQL, MySQL, MongoDB, Firebase, Supabase โœ… Integrations: -OAuth Providers: OAuth, Auth0 -Social Media APIs: Facebook API, Google API, Instagram API, Youtube API, Tiktok API, Whatsapp API -Payment Gateways: Paypal API, Stripe API -Communication: SendGrid, Sockets.io, OpenTok (video calling), WebRTC -Other APIs: Krogger API, WeChat, Linkedin APIs -Data Visualization: High Charts, jQuery Data tables, ChartJS โœ… Version Control: Github, Gitlab, Bitbucket WHY HIRE ME? โœ… Proven Track Record: 100% Job Success Rate โœ… Versatile Expertise: E-commerce, Business Websites, Custom Solutions, Scalable APIs โ€“ Iโ€™ve tackled it all. โœ… Trusted by 90+ Clients Across Multiple Platforms โœ… 5+ Years of Professional Experience Languages: C#, Java, C++, C, Python, JavaScript Technologies I am proficient in: React, Next.js, Redux, TypeScript, JavaScript, HTML, CSS, TailwindCSS, MUI, Formik, Storybook, Atomic Design, Firebase, RESTful API, Three.js custom carousel, marquee animations, Smooth Scrollbar JavaScript Plugin, Webpack, npm, yarn, No Code, Migration, Landing Pages, WP Blocks, Elementor, Redux Framework, WooCommerce, WooCommerce Stripe Payments Gateway, WordPress Website Development, E-commerce Development, Landing Page Development, PSD to HTML, Figma to HTML, Page Speed Optimization, Bug Fixing, Quick Fixes, API Integration.

  • Front-End Development
  • React
  • Node.js
  • React Native
  • Next.js
  • ExpressJS
  • MongoDB
  • Firebase
  • SQL
  • Java
  • JavaScript
  • GraphQL
  • TypeScript
  • Firebase Cloud Firestore
  • CSS
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