You will get a SaaS MVP with FastAPI, Stripe billing, and multi-tenant RBAC
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Project details
A complete SaaS MVP: FastAPI backend, React frontend, Stripe billing,
multi-tenant RBAC, and production deployment. Not a template. Not a tutorial
project. A working product your first users can pay for.
Most SaaS MVPs fail at the billing layer or the auth layer because they were
added as afterthoughts. This service builds them as the foundation. Stripe
checkout, webhook verification, and real-time subscription state sync are
wired in from day one. Multi-tenant RBAC with role hierarchy means the first
enterprise client does not require an architecture rewrite.
The backend uses FastAPI with PostgreSQL, SQLAlchemy ORM, and JWT
authentication migrated to JWKS for zero-downtime key rotation. The React
frontend includes role-gated routing, Stripe.js integration, and an admin
panel. Both are deployed with environment separation and a CI/CD pipeline.
Who this is for: founders ready to charge their first users, product managers
building an internal SaaS tool, and technical leads who need a full-stack
starting point that does not require six months of refactoring before launch.
multi-tenant RBAC, and production deployment. Not a template. Not a tutorial
project. A working product your first users can pay for.
Most SaaS MVPs fail at the billing layer or the auth layer because they were
added as afterthoughts. This service builds them as the foundation. Stripe
checkout, webhook verification, and real-time subscription state sync are
wired in from day one. Multi-tenant RBAC with role hierarchy means the first
enterprise client does not require an architecture rewrite.
The backend uses FastAPI with PostgreSQL, SQLAlchemy ORM, and JWT
authentication migrated to JWKS for zero-downtime key rotation. The React
frontend includes role-gated routing, Stripe.js integration, and an admin
panel. Both are deployed with environment separation and a CI/CD pipeline.
Who this is for: founders ready to charge their first users, product managers
building an internal SaaS tool, and technical leads who need a full-stack
starting point that does not require six months of refactoring before launch.
Programming Languages
HTML & CSS, JavaScript, PythonCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$699
|
Standard
$1,499
|
Advanced
$2,499
|
|---|---|---|---|
| Delivery Time | 10 days | 18 days | 25 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | |
Content Upload | - | - | - |
Responsive Design | - | ||
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$75
AI feature
(+ 5 Days)
+$500Frequently asked questions
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About Umer
Python AI Developer | FastAPI | React | SaaS MVP | LLM Integration
100%
Job Success
Islamabad, Pakistan - 1:00 pm local time
production SaaS platforms, AI-powered systems, and complete MVP
builds across healthcare, legal, retail, e-commerce, and
construction tech. I work across FastAPI, React, TypeScript,
Supabase, PostgreSQL, Stripe, OpenAI, LangChain, and AWS. I own
the full product from database schema to deployed frontend.
If you are building something that needs AI built in from day one,
not bolted on later, that is what I do. I have shipped RAG pipelines
with hybrid vector and keyword retrieval, multi-LLM orchestration
layers abstracting 7 providers behind a single interface, LangChain
agents with custom tool chains, and GPT-powered automation engines
that replace entire human workflows. The AI is not a feature. It
is the architecture.
Here is what I have built as sole architect and developer.
An AI scheduling SaaS currently live with paying customers. FastAPI
backend on Supabase with full Stripe billing, React frontend with
interactive Gantt visualization, and an Azure OpenAI pipeline that
converts raw project scope documents into fully dependency-mapped
schedules. What used to take a planning team 2 to 3 weeks happens
in minutes. Multi-tenant RBAC, JWKS JWT auth, deployed on Render.
An enterprise eDiscovery platform that is SOC 2 certified and runs
across AWS, Azure, and GCP. FastAPI, PostgreSQL, Redis, Celery,
Apache Solr, and Qdrant with hybrid RAG retrieval. Seven LLM
providers unified behind one interface. Fifty domain modules. This
is the type of system law firms pay $500K per year to access from
commercial vendors. I built it from scratch.
A full hospital operations SaaS for pediatric clinics. FastAPI,
PostgreSQL, Redis, React TypeScript. The encounter engine creates
7 entity types inside a single ACID transaction. Invoice sequencing
uses pessimistic row locking so numbers are always sequential under
concurrent billing load. Five role tiers across 60 protected routes.
A workflow that used to take 15 minutes at the front desk now takes
under 30 seconds.
A fully serverless retail collaboration platform on AWS. Twenty plus
Lambda functions with 3 shared internal Python packages distributed
via CodeArtifact. A LangChain AI agent with 6 integrated tools
embedded inside a real-time chat interface. Notification fan-out
across 6 channels from a single pipeline. Differential CI/CD across
4 environments so only the functions that changed get redeployed.
An AI sales automation engine that replaced a 2 person SDR team.
The system pulls real Gmail conversation history, injects it into
GPT prompts, generates context-aware follow-up emails, and threads
them back into the original conversation via RFC822 headers. Reply
detection resets the sequence automatically. Over 1000 Pipedrive
deals processed every minute during business hours with no human in
the loop.
A full-stack e-commerce operations platform that collapsed 6
separate tools into one system and cut daily operational overhead
from 3 hours to 30 minutes. Multi-source order ingestion, automated
SMS lifecycle, dual Kanban CRM with cross-entity SQL deduplication
running every 5 minutes, one-click USPS batch processing.
For clients I build full-stack SaaS MVPs with FastAPI or Node
backend, React or Next.js frontend, Supabase or PostgreSQL, Stripe
billing, and CI/CD deployment. Complete products with no handoffs.
I build AI and LLM integrations that go beyond calling an API. RAG
pipelines, LangChain agents with custom tools, OpenAI and Azure
OpenAI, vector search with Qdrant or FAISS, document processing
pipelines, GPT-powered workflows that eliminate manual processes.
I build Python backends with multi-tenant RBAC, Celery task queues,
Redis, WebSocket delivery, SAML SSO, and JWT auth. Production
concerns are the default, not an upgrade.
I also have genuine domain experience in healthcare software,
construction and project management tooling, legal tech, and
e-commerce operations. These are not projects I read about. They
are systems I designed and shipped.
Every system I deliver has proper auth, error handling, structured
logging, and a working deployment pipeline. I do not build
prototypes. I build things that run in production without anyone
watching them.
Available for full-stack development, AI integration work, SaaS MVP
builds, and long-term product engineering engagements.
Steps for completing your project
After purchasing the project, send requirements so Umer can start the project.
Delivery time starts when Umer receives requirements from you.
Umer works on your project following the steps below.
Revisions may occur after the delivery date.
Scoping call
You share your product idea, user roles, and billing model
Backend first
API, auth, and billing confirmed working before frontend starts