Principal Software Engineer
Full-Stack, Cloud & AI Systems for Remote Teams
I architect and scale SaaS platforms, cloud backends, and AI-enabled products, using Node.js, Python, React, Angular, and AWS, with Claude/OpenAI-based systems for document and workflow automation. I work well with remote teams, ship fast, and focus on clean, reliable delivery.
Open to remote roles and freelance work. Comfortable with US and EU time zones.
What I Can Help With
Available for remote roles and freelance work
- Build new SaaS features and products
- Join or lead remote product teams as a full-stack engineer
- Fix slow or messy backend systems
- Migrate legacy code safely with zero downtime
- Build APIs and microservices architectures
- Improve performance and system reliability
- Build AI/LLM features: Claude, OpenAI, RAG, and MCP-based tool access
Featured Case Studies
Two systems built to scale: one for data, one for AI
CloudDrive: 500K Daily Operations at Scale
The Problem
Biztree needed a unified file storage system that could handle 500K daily operations, support multiple SaaS applications, and provide role-based access control with enterprise-grade security. Sub-100ms response times were a hard requirement.
The Solution
I architected CloudDrive as a distributed microservice using NestJS with event-driven processing. It uses AWS S3 for storage, Lambda for thumbnail generation, and BullMQ for async job processing. The system handles peak loads without degradation.
Key Architecture Decisions:
- • Async Processing: BullMQ queues for thumbnail generation and metadata processing
- • Caching Layer: Redis for frequently accessed file metadata
- • AWS Integration: S3 presigned URLs for secure direct uploads, Lambda for image optimization
- • RBAC: Fine-grained permission system with role inheritance
Impact & Results
Tech Stack
ConvertCalculator: From Drag-and-Drop Builder to AI-Native App Generator
The Problem
ConvertCalculator is a no-code SaaS for building calculators, quote forms, and pricing engines. Building one still meant manually dragging, configuring, and wiring fields by hand, which was slow for non-technical users and a ceiling on how fast new templates could ship.
The Solution
I led the shift from a pure drag-and-drop builder to a prompt-driven AI experience: users describe what they need in plain language, and the system generates a working calculator, quote form, landing page, or lead-capture flow, fully wired into the existing rules-driven workflow engine and ready to embed on WordPress, Shopify, Wix, or Framer.
Key Architecture Decisions:
- • Prompt-to-App Generation: LLM-driven pipeline maps user intent to structured app definitions (fields, logic, pricing rules) instead of free-form output
- • Rules Engine Integration: Generated assets plug directly into the existing rules-driven workflow engine, so AI output behaves like a hand-built configuration
- • Platform Embeds: Generated tools ship as embeddable widgets across WordPress, Shopify, Wix, and Framer
- • Data Layer: PostgreSQL-backed configuration and lead-capture pipeline behind every generated asset
Impact & Results
- Replaced manual drag-and-drop configuration with natural-language app generation
- Generated output plugs directly into the existing rules engine: structured, not freeform
- Shipped as embeddable widgets across WordPress, Shopify, Wix, and Framer
Tech Stack
Projects
Systems built, shipped, and running at scale
Biztree Business-in-a-Box
2023-PresentProblem
Multiple SaaS applications needed unified backend with reduced latency
Solution
Architected microservices backend with BullMQ and RabbitMQ for async processing
Key Results
- 12M+ Users
- 45% Latency Reduction
- 40% Dev Effort Cut
Tech Stack
RevBits PAM
2021-2023Problem
Enterprise teams needed unified privilege access management with real-time auditing
Solution
Engineered microservices platform with session forensics and comprehensive audit logs
Key Results
- Globee Gold Award
- Real-time Auditing
- Enterprise Scale
Tech Stack
Arccos Golf
2019-2021Problem
Golfers needed real-time performance tracking with environmental adjustments
Solution
Built real-time tracking system with Microsoft, integrating wind and slope data
Key Results
- 40% Accuracy Improvement
- #3 Global Innovation
- Real-time Tracking
Tech Stack
Ancera
2019-2021Problem
Food safety required fast, automated contamination detection
Solution
Built ML-powered detection pipelines with distributed processing
Key Results
- 90% Processing Speed
- ML-Powered
- Revenue Generation
Tech Stack
Proof of Scale
Delivering results at enterprise level
Experience
8+ years of proven results
Principal Software Engineer
Biztree
Architected a unified NestJS microservices backend powering 5+ SaaS applications serving 12M+ users, cutting backend development effort by 40%. Reduced API latency by 45% with BullMQ and RabbitMQ, and led a zero-downtime MongoDB migration for 50M+ records using safe batch processing and rollback strategies. Built CloudDrive, a file platform supporting 500K+ daily operations with RBAC, S3 presigned URLs, and AWS Lambda thumbnail generation. Designed a centralized AI middleware and MCP server layer for document intelligence and conversational workflows, integrating Claude and OpenAI with structured outputs, secure tool access, token tracking, and subscription enforcement.
- Architected unified microservices backend for 12M+ users, cutting backend effort by 40%
- Designed AI middleware & MCP server layer: Claude/OpenAI workflows with secure tool access and token tracking
- Built CloudDrive: 500K+ daily file operations with RBAC and secure access
- Led zero-downtime MongoDB migration: 50M+ records with rollback-safe batch processing
- Reduced API latency by 45% using BullMQ and RabbitMQ
- Built HRM backend with PostgreSQL, TypeORM, CQRS
- Strengthened engineering foundations: Docker, CI/CD, structured logging, and automated testing
Senior Software Engineer
ConvertSite (ConvertCalculator)
Full-stack engineer for ConvertCalculator, a configurable no-code SaaS for building calculators, quote forms, pricing engines, and lead-capture flows. Led the platform's shift into AI-native territory, evolving the drag-and-drop builder into a prompt-driven experience that generates calculators, quote forms, landing pages, and other business assets directly from user intent. Built the rules-driven workflow engine and shipped embeddable integrations for WordPress, Shopify, Wix, and Framer, backed by PostgreSQL.
- Evolved a drag-and-drop builder into a prompt-driven AI app generator
- Generated calculators, quote forms, and landing pages directly from user intent
- Built a rules-driven workflow engine for pricing logic and lead capture
- Shipped embeddable integrations for WordPress, Shopify, Wix, and Framer
- Delivered full-stack features on a PostgreSQL-backed platform
Senior Software Engineer
InvoZone
Delivered an enterprise Privileged Access Management (PAM) platform for RevBits security teams. Designed a scalable microservices architecture with load balancing, multi-instance clustering, and session forensics. Won Gold in the 2022 Globee Awards against Thycotic.
- Built enterprise PAM platform: credential and session management
- Designed scalable microservices with load balancing and clustering
- Added session forensics: keystroke and video recording for auditing
- Improved deployment speed by 30% with CI/CD automation
- Hardened security: XSS, SQL injection, brute-force protection
- Won Globee Gold Award for security innovation (2022)
Software Engineer
TenX
Built full-stack applications for Ancera (food safety) and Arccos Golf (sports analytics). Engineered distributed, resource-intensive systems for scientific data processing and real-time analytics with measurable impact.
- Built automated contamination detection system. Reduced processing by 90%
- Built real-time golf performance tracking with Microsoft. Improved accuracy by 40%
- Designed distributed systems for high-throughput scientific computing
- Doubled release frequency with CI/CD automation and testing
- Optimized internal NPM packages to improve developer productivity
- Won #3 ranking in global sports innovation awards (Arccos)
Bachelor of Science in Computer Science (BSCS)
FAST-NUCES, Lahore, Pakistan · 2014 - 2018
AWS Certified Developer – Associate
Amazon Web Services
Skills & Expertise
Technologies I work with
Backend
- Node.js
- NestJS
- Express.js
- Python
- FastAPI
- REST APIs
- GraphQL
- JWT / OAuth 2.0
Frontend
- React
- Next.js
- Angular
- Redux
- NgRx
- RxJS
- Tailwind CSS
Databases
- MongoDB
- PostgreSQL
- MySQL
- Redis
Cloud & DevOps
- AWS
- Lambda
- S3
- EC2
- RDS
- Docker
- Kubernetes
- CI/CD
Architecture
- Microservices
- Distributed Systems
- Event-Driven
- CQRS
- System Design
AI / LLM
- Claude & OpenAI APIs
- MCP Server Development
- RAG & Vector Search
- LangChain
- n8n
- Structured Outputs & Tool Calling
Testing
- Jest
- Cypress
- Unit Testing
- Integration Testing
- TDD
Tools
- Git
- Jira
- Swagger
- OpenAPI
- PM2
Also comfortable with: C#, .NET, ASP.NET Core, Entity Framework, and Django.
How I Work
Team or Solo
I work with product teams or take ownership of features. Either way, I deliver clean code and reliable results.
Clear Communication
Async-friendly. Regular updates, honest about trade-offs and timelines. No surprises.
Remote-First
Comfortable with US and EU time zones. I adjust my schedule as needed and keep things transparent.
Get It Done
Full-stack work. I don't hand things off halfway. I build, test, deploy, and support what I ship.
About
I build software that needs to work under pressure. Most of my work has been in SaaS, backend systems, and product engineering, where the goal is not just to ship features but to keep things fast, reliable, and easy for teams to work with.
I am comfortable working remotely, collaborating across time zones, and taking ownership from planning to delivery. I have worked as a core team member at product companies and delivered complete systems as a freelancer on Upwork.
AI is also core to what I build, not just a tool I code with. I design and ship AI/LLM systems for real production workflows, including Claude and OpenAI integrations, MCP servers for secure tool access, and RAG-based retrieval.
Freelance Credibility
Trust and proven results across platforms
Top Rated Plus on Upwork. Delivered work across SaaS, security, migrations, and custom systems. Remote collaboration. Reliable delivery.
Top Rated Plus
Upwork's highest freelancer badge
Complex Systems
Trusted for backend work and product improvements
Proven Work
SaaS, security, migrations, dashboards
Reliable Delivery
Clean communication. Engineering decisions that hold up.
Get in Touch
Open to remote roles and freelance projects
Have a role or project in mind? Let's talk.
Whether you need a full-stack engineer for your remote team or help shipping a product, I am open to hearing about it.
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