You will get bug fixed of your django backend, REST API
Rising Talent
Rising Talent
Project details
Is your Django app throwing errors, returning broken API responses, or loading too slowly? I specialise in diagnosing and fixing Django backend issues cleanly and permanently — no temporary patches, no shortcuts.
I have hands-on experience rescuing a live production SaaS where the homepage took 90+ seconds to load. After a full diagnosis and architectural fix, it loaded in under 1 second. That same diagnostic approach goes into every bug fix I deliver.
What I Fix
• Backend errors — 500, 404, migration failures, TemplateDoesNotExist
• REST API issues — serializer validation, permissions, authentication, CORS
• Deployment problems — Gunicorn, Nginx, static files, environment variables, AWS, Digital Ocean
• Database issues — slow queries, missing indexes, N+1 problems
• Admin panel bugs and configuration issues
• Performance problems — caching, query optimisation, load time reduction
Scope Breakdown
• Starter — Single bug diagnosis and fix with explanation
• Standard — Up to 3 bugs fixed plus basic performance review
• Advanced — Full performance audit, query optimisation, caching implementation, and detailed report
Clean fix. Root cause explained. No recurrence.
I have hands-on experience rescuing a live production SaaS where the homepage took 90+ seconds to load. After a full diagnosis and architectural fix, it loaded in under 1 second. That same diagnostic approach goes into every bug fix I deliver.
What I Fix
• Backend errors — 500, 404, migration failures, TemplateDoesNotExist
• REST API issues — serializer validation, permissions, authentication, CORS
• Deployment problems — Gunicorn, Nginx, static files, environment variables, AWS, Digital Ocean
• Database issues — slow queries, missing indexes, N+1 problems
• Admin panel bugs and configuration issues
• Performance problems — caching, query optimisation, load time reduction
Scope Breakdown
• Starter — Single bug diagnosis and fix with explanation
• Standard — Up to 3 bugs fixed plus basic performance review
• Advanced — Full performance audit, query optimisation, caching implementation, and detailed report
Clean fix. Root cause explained. No recurrence.
Programming Languages
PythonWhat's included
| Service Tiers |
Starter
$30
|
Standard
$70
|
Advanced
$150
|
|---|---|---|---|
| Delivery Time | 2 days | 5 days | 7 days |
Number of Revisions | 1 | 2 | 3 |
Bug Investigation | |||
Fix Documentation | |||
Detailed Code Comments |
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Fast Delivery
+$10 - $30Frequently asked questions
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About Md Mojno
Python Django Developer | SaaS | REST API | AWS | Backend
100%
Job Success
Joypurhat, Bangladesh - 2:05 pm local time
My work covers two distinct modes: taking over broken systems and restoring them, and building complex platforms from the ground up.
PROJECT 1 — Sellzzy (Multi-Tenant Digital Commerce SaaS)
Sellzzy is a live multi-tenant SaaS platform where digital creators sell products, manage subscriptions, and run storefronts. Over nearly two years I grew from developer to leading the engineering team, owning architectural decisions and maintaining delivery standards on a live production system.
¶ The problem when I joined:
• Homepage took 90+ seconds to load — effectively unusable
• Dependencies severely outdated with cascading compatibility failures
• Code quality issues blocking developer contributions
• Zero documentation, preventing team onboarding
¶ What I delivered:
• 98% load time reduction — from 90+ seconds to under 1 second
• Store owner dashboard loads in ~0.5 seconds
• Customer storefront loads in ~1 second average
• Designed a hybrid Django MVT + REST API architecture — server-side rendering for speed and SEO, AJAX-driven APIs for dynamic data — delivering a modern SPA-like experience without a full frontend framework rebuild
• Refactored the entire codebase, upgraded all dependencies, and restructured the architecture
• Built comprehensive documentation that restored developer velocity across the team
• Led the engineering team for the final 7 months: architectural decisions, code review, and delivery standards
PROJECT 2 — CashSheets (Multi-Tenant Accounting SaaS)
CashSheets is a multi-tenant accounting SaaS I architected and built solo, from an open source foundation (django-ledger) to a fully structured production-ready system.
¶ What I built:
• Multi-tenant architecture using django-tenants with full tenant isolation
• Pluggable integration framework connecting QuickBooks Online, Square POS, and Wave — built once, reused for every future integration
• Wagtail CMS as the platform-level administration layer
• Complete subscription management system built inside Wagtail
• Dual-level Stripe integration — platform billing and tenant-level payment processing as two separate concerns in one codebase
¶ TECH STACK
• Backend: Python, Django, DRF, Celery, Redis, RabbitMQ, django-tenants, Wagtail
• Frontend: React.js, Next.js, Tailwind CSS, JavaScript, AJAX
• Databases: PostgreSQL, MySQL
• Cloud: AWS (EC2, S3, RDS, SES, CodePipeline), Digital Ocean, Docker, Nginx, CI/CD
• Integrations: Stripe, PayPal, Shopify, QuickBooks Online, Square POS, Wave
¶ SERVICES
• Multi-tenant SaaS architecture and development
• REST API design and development (DRF)
• Legacy system rescue — performance, architecture, dependency modernization
• Full-stack development (Django + React / Next.js)
• Third-party integrations (accounting, payments, POS)
• Stripe subscription billing — platform and tenant level
• AWS deployments and CI/CD pipelines
• Wagtail CMS implementation
• MVP development from idea to production
• Technical team leadership and code review
I have handled both sides of the hardest Django work — rescuing a broken production system under live traffic, and architecting a complex multi-tenant platform from scratch with no one else to defer to.
If you are building a SaaS product, need a Django system architected properly, or want a developer who has led teams and delivered on real production systems — let's talk.
Steps for completing your project
After purchasing the project, send requirements so Md Mojno can start the project.
Delivery time starts when Md Mojno receives requirements from you.
Md Mojno works on your project following the steps below.
Revisions may occur after the delivery date.
Review & Plan
I analyze the issue, review your code, and confirm the scope of the fix before starting work.
Debug & Fix
I debug the problem in Django/DRF/backend code or deployment setup and implement the fix