You will get SaaS OAuth Integration Setup | API Authentication & Secure Login
Top Rated
Project details
I provide secure OAuth integration and API authentication setup for SaaS and web applications. From OAuth provider configuration and developer portal setup to token flow and secure login implementation, I help ensure a smooth, reliable, and production-ready authentication setup.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$200
|
Standard
$500
|
Advanced
$1,000
|
|---|---|---|---|
| Delivery Time | 2 days | 4 days | 6 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 1 | 1 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
35 reviews
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WA
Wesley A.
Aug 19, 2026
60 minute consultation
Varun helped my understand the technology stack for a website that I want to build. Great explanation of the technology and very helpful demonstration. Thank you very much!!
AE
Alexander E.
Aug 18, 2026
60 minute consultation
FW
Frank W.
Aug 16, 2026
Educational Platform Development
Working with Varun has been an absolute pleasure. Always following scopes exactly and delivering on time. Good experience and will come back in the future.
Sv
Sebastiaan v.
Aug 10, 2026
Pre closed Beta bug hunting & security
ZK
Zak K.
Aug 6, 2026
Build MVP for budget management SAAS tool for small creative agencies
About Varun
Fullstack SaaS Developer | AI Developer | Python_React&Nextjs, AI SAAS
100%
Job Success
Panchkula, India - 5:05 am local time
I am a Full Stack SaaS Developer specializing in building scalable, subscription-based SaaS products and AI-powered web applications from concept to launch. I help startups, founders, and businesses transform ideas into production-ready software using React, Next.js, JavaScript, TypeScript, Node.js, Python, PostgreSQL, MongoDB, AWS, and modern cloud technologies.
Over the years, I have helped companies build scalable SaaS applications, customer portals, CRM systems, ERP platforms, marketplaces, AI-powered products, internal business tools, membership platforms, workflow automation solutions, and intelligent business platforms powered by Large Language Models (LLMs).
My expertise covers the complete SaaS development lifecycle from product architecture and MVP development to AI integration, scaling, optimization, and long-term maintenance. Whether you're looking to build a new SaaS platform, modernize an existing application, create a customer-facing dashboard, implement subscription billing, develop AI-powered workflows, or build a complex multi-tenant application, I can help deliver a secure, scalable, and user-friendly solution.
### 𝗦𝗮𝗮𝗦, 𝗣𝘆𝘁𝗵𝗼𝗻 & 𝗔𝗜 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲
✓ SaaS Product Development
✓ Full Stack Development
✓ Multi-Tenant SaaS Architecture
✓ MVP Development for Startups
✓ B2B & B2C SaaS Platforms
✓ Enterprise Software Development
✓ Customer Portals & Self-Service Platforms
✓ Subscription-Based Applications
✓ Stripe Billing & Payment Integrations
✓ REST API & GraphQL Development
✓ Authentication & Authorization Systems
✓ Role-Based Access Control (RBAC)
✓ Admin Dashboards & Analytics Platforms
✓ CRM & ERP Development
✓ Workflow Automation Platforms
✓ AI SaaS Applications
✓ AI Chatbots & AI Assistants
✓ OpenAI, Anthropic Claude & Gemini API Integration
✓ Retrieval-Augmented Generation (RAG) Applications
✓ AI Workflow Automation
✓ Prompt Engineering & LLM Integration
✓ Python Backend Development (FastAPI, Django)
✓ API Integrations & Third-Party Services
✓ Database Architecture & Optimization
✓ Cloud Deployment & DevOps
✓ Performance Optimization & Scalability
### 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀
React.js • Next.js • JavaScript • TypeScript • Node.js • Express.js • NestJS • **Python** • FastAPI • Django • PostgreSQL • MongoDB • MySQL • Prisma • Supabase • Firebase • AWS • Vercel • Docker • Redis • Tailwind CSS • Material UI • Stripe • OpenAI API • Anthropic Claude API • Google Gemini API • LangChain • Vector Databases • Pinecone • Weaviate • FAISS • REST APIs • GraphQL
I focus on building software that not only works but is designed for growth, scalability, maintainability, AI readiness, and long-term business success. My goal is to become a long-term technology partner for startups and businesses looking to build world-class SaaS products and AI-powered platforms.
### 𝗦𝗲𝗮𝗿𝗰𝗵 𝗺𝗲 𝘂𝘀𝗶𝗻𝗴 𝗸𝗲𝘆𝘄𝗼𝗿𝗱𝘀
SaaS Developer, Full Stack SaaS Developer, SaaS Application Developer, SaaS Development, SaaS Engineer, SaaS Architect, React Developer, Next.js Developer, JavaScript Developer, TypeScript Developer, Node.js Developer, **Python Developer**, FastAPI Developer, Django Developer, AI Developer, AI Engineer, AI SaaS Developer, LLM Developer, OpenAI Developer, Claude API Developer, LangChain Developer, RAG Developer, AI Automation Developer, Generative AI Developer, AI Chatbot Developer, Multi-Tenant SaaS Developer, Startup MVP Developer, Product Engineer, Software Engineer, Web Application Developer, CRM Developer, ERP Developer, Dashboard Developer, Subscription Platform Developer, Stripe Integration Expert, API Integration Developer, Cloud Application Developer, Full Stack Engineer.
Steps for completing your project
After purchasing the project, send requirements so Varun can start the project.
Delivery time starts when Varun receives requirements from you.
Varun works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements Review
Review OAuth provider requirements, application stack, and developer portal/API access shared by the client.
OAuth Configuration
Configure OAuth provider, redirect URIs, scopes, authentication flow, and required API settings.