You will get Full-Stack Feature Development & Bug Fixes for Your Existing SaaS App
Project details
Your SaaS is live and every hour of downtime costs you users and revenue. Whether something's broken in production or you need a new feature shipped without touching what's already working, I handle it.
What I fix & build:
1) Production bugs: broken endpoints, silent failures, race conditions, memory leaks, auth & JWT errors
2) Feature integration: Stripe payments, webhooks, OAuth2 login, third-party APIs, subscription billing, RBAC, job queues
3) Database: query optimization, indexing, safe schema migrations, connection pooling, slow query diagnosis
4) API work: endpoint development, caching, rate limiting, payload validation
How I ship:
1) Zero-downtime deployments via blue-green or canary strategies
2) DB migrations run safely against live data, no locked tables, no data loss
3) Feature flags for gradual rollouts
4) AWS-aware: EC2, RDS, S3, secrets management handled properly
5) Clean code to your repo with clean documentation
What you get:
1) Tested, working implementation
2) Written summary of what changed and why
3) Production-safe delivery from day one
What I fix & build:
1) Production bugs: broken endpoints, silent failures, race conditions, memory leaks, auth & JWT errors
2) Feature integration: Stripe payments, webhooks, OAuth2 login, third-party APIs, subscription billing, RBAC, job queues
3) Database: query optimization, indexing, safe schema migrations, connection pooling, slow query diagnosis
4) API work: endpoint development, caching, rate limiting, payload validation
How I ship:
1) Zero-downtime deployments via blue-green or canary strategies
2) DB migrations run safely against live data, no locked tables, no data loss
3) Feature flags for gradual rollouts
4) AWS-aware: EC2, RDS, S3, secrets management handled properly
5) Clean code to your repo with clean documentation
What you get:
1) Tested, working implementation
2) Written summary of what changed and why
3) Production-safe delivery from day one
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$50
|
Standard
$75
|
Advanced
$120
|
|---|---|---|---|
| Delivery Time | 3 days | 3 days | 7 days |
Number of Revisions | 3 | 3 | 6 |
Number of Pages | 2 | 3 | 5 |
Design Customization | - | ||
Content Upload | |||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$20 - $100
Additional Revision
+$15
Additional Page
(+ 1 Day)
+$25
Design Customization
(+ 1 Day)
+$30Frequently asked questions
About Junaid
Full-Stack SaaS MVP Developer | Claude Code | Django, Next.js, Node.js
Islamabad, Pakistan - 4:18 am local time
I specialize in building the full stack: backend systems in Django, Django REST Framework, FastAPI, and Node.js, designed with proper architecture from day one, clean data models, scalable APIs, and systems that hold up when real users (and real load) show up. On the frontend, I build with React and Next.js to match.
I also build AI-powered features directly into products: custom chatbots, LLM integrations (OpenAI/ChatGPT, Anthropic Claude, Google Gemini, Grok), and AI-based web applications, designed into the architecture, not bolted on as an afterthought.
I use Claude Code and GitHub Copilot as part of my workflow, which means faster delivery without cutting corners on code quality or system design.
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🎯 WHAT I BUILD
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▸ SAAS MVP DEVELOPMENT (Django/FastAPI/Node.js + React/Next.js)
Auth, subscriptions, dashboards, multi-tenancy, architected to handle real paying users from launch, not just a demo.
▸ SYSTEM DESIGN & BACKEND ARCHITECTURE
Database schema design, API architecture, scalability planning. I design systems that grow with your product instead of needing a rebuild at 100 users.
▸ AI CHATBOTS & LLM INTEGRATION
Custom chatbots and AI agents using OpenAI, Anthropic Claude, Google Gemini, and Grok. RAG pipelines, document Q&A, and conversational interfaces wired cleanly into your product.
▸ AI-POWERED WEB APPLICATIONS
Full applications built around LLM features, complete products designed around AI capability, not just an API with a chatbot bolted on.
▸ REST API DEVELOPMENT
Django REST Framework and FastAPI services built for performance, clear documentation, and easy handoff to other developers.
▸ DEVOPS & CLOUD DEPLOYMENT
Docker containerization, CI/CD pipelines with GitHub Actions and Azure DevOps, deployment on AWS, Nginx configuration for production-grade reliability.
▸ CODE AUDIT & STABILIZATION
Inherited a messy or broken codebase? I audit the architecture, fix what's fragile, and give you a clear path to stability.
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🛠️ TOOLS & TECHNOLOGY
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Backend & Architecture: Django, Django REST Framework, FastAPI, Node.js, Express.js, System Design, REST APIs, GraphQL
Frontend: React, Next.js, JavaScript, TypeScript, Tailwind CSS
AI/LLM: OpenAI API, ChatGPT, Anthropic Claude API, Google Gemini, Grok, LangChain, RAG pipelines, AI agents, custom chatbots
Databases: PostgreSQL, MySQL, MongoDB, Redis
DevOps & Cloud: Docker, AWS, Azure DevOps CI/CD, GitHub Actions, Nginx, Git, GitHub, VMs, Linux Servers
AI-Assisted Development: Claude Code, GitHub Copilot, Cursor, Loveable, AntiGravity
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💬 MY APPROACH
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I treat every project like it's my own product, not just a contract. That means thinking through the architecture before writing code, clear communication, realistic timelines, and systems built to scale not just to demo well. Whether you're validating a new idea, adding AI features to an existing platform, or need a reliable backend engineer who can also handle the frontend, I'm ready to build with you.
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🔍 SEARCH KEYWORDS
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SaaS MVP Developer, Full Stack SaaS Developer, System Design, Backend Architect, Django Developer, FastAPI Developer, Node.js Developer, React Developer, Next.js Developer, AI Chatbot Developer, LLM Integration, OpenAI Developer, Anthropic Claude Developer, Gemini API Developer, AI SaaS Developer, REST API Developer, Backend Developer, DevOps Engineer, Docker Developer, AWS Developer, CI/CD Pipeline, Startup MVP Developer, Software Engineer, AI Web Application Developer
Steps for completing your project
After purchasing the project, send requirements so Junaid can start the project.
Delivery time starts when Junaid receives requirements from you.
Junaid works on your project following the steps below.
Revisions may occur after the delivery date.
Scope Review & Codebase Access
You share your repo, error logs, or feature brief. I review the codebase, identify the problem or plan the feature, and confirm exact scope before touching anything.
Development & Implementation
I fix the bug or build the feature clean, tested, production-safe. DB migrations, API integrations, deployment config handled as needed.