Abubakar Mulla
Backend Engineer building scalable, secure, and production-ready backend systems.
Experience across payments, subscriptions, API design, security hardening, and AI-powered backend integrations — focused on real-world, production-grade systems.
About Me
I’m a Backend Engineer with experience building and maintaining enterprise-grade backend systems.
I primarily work with Python, Django, and Spring Boot to design secure and scalable backend services and APIs. My experience includes developing robust APIs, architecting payment flows using Stripe and Moyasar, handling webhook-based event processing, and managing end-to-end payment lifecycle. I’ve also built performance-critical systems and backend mechanisms that are actively used in production environments.
Alongside, I’ve also integrating Generative AI capabilities into applications — such as AI based product description and product image generation, also building intelligent search and recommendation features using short language models — while ensuring data security and system reliability.
I focus on writing clean, maintainable backend code and solving real system-level challenges around scalability, security, reliability, and long-term maintainability.
Skills & Tech Stack
Technologies and skills I use to build secure, scalable backend systems.
Backend
- Python
- Django REST Framework
- Flask (REST APIs)
- Java
- Spring Boot
Databases & Caching
- MySQL
- Memcached
- SQLite (Dev/Test)
Tools
- Git/GitHub
- Postman
- Jira
- Agile / Scrum
Payments & Queuing
- Stripe
- Moyasar
- Webhooks
- RabbitMQ
Infrastructure
- AWS
- Docker
- Linux
- CI/CD
Gen-AI
- SLM Integration
- Image generation
- OpenAI APIs
Projects
Enterprise-grade backend systems featuring payment engines, scalable architectures, security-focused APIs, and production-level integrations with real-world impact.
Torry Harris Marketplace
Enterprise marketplace platform backend supporting vendor subscriptions, payments, notifications, and AI-powered product features.
THM-Pay: Payment Engine
Centralized payment middleware designed to abstract multiple payment gateways and manage payment, subscription, and invoicing workflows.
Order Orbit
Order and inventory management platform that streamlines interactions between restaurants and customers.
Experience
Professional experience building production-grade backend systems with a focus on payments, scalability, and security.
Backend EngineerFull-time
Apr 2024 — PresentTorry Harris Integration Solutions • Bangalore, India
Working on enterprise-scale backend systems focused on payments, subscriptions, and marketplace platforms.
- • Designed and developed scalable backend services using Django, Django REST Framework, and Flask
- • Built and maintained a centralized payment middleware integrating Stripe and Moyasar
- • Implemented secure subscription billing, invoice generation, and webhook handling
- • Hardened APIs by sanitizing 130+ endpoints to mitigate XSS vulnerabilities
- • Integrated Gen-AI solutions for product content and image generation using OpenAI
- • Worked on POCs including RabbitMQ for async processing, ClamAV for media security, and SLM-based search optimization
SDE InternInternship
Oct 2023 — Apr 2024Torry Harris Integration Solutions • Bangalore, India
Backend-focused internship contributing to a production-grade order management platform while gaining hands-on training in backend technologies.
- • Contributed to the design and development of Order Orbit, an order and inventory management system.
- • Built REST APIs using Spring Boot and followed clean backend architecture principles
- • Implemented JWT-based authentication for secure role-based access
- • Worked with MySQL for data modeling and persistence
- • Received structured training on backend development, API design, and system workflows
Let’s Build Something Solid
I’m open to backend engineering roles where I can contribute to building scalable, reliable systems and production-grade backend solutions.