Ali Zaib

Ali Zaib

Top Rated Plus on Upwork

Sr. Python Developer | System Architect | Database Manager | Technical Lead | Top Rated Plus on Upwork

8+ years ExperienceLahore, Pakistan

With 8+ years of experience architecting scalable, AI Models Deployment and integration, multi-tenant systems and leading backend development in Python, FastAPI, and microservices. Expert in async architectures (Redis, Celery, WebSockets), cloud infrastructure (AWS, GCP, DigitalOcean), and secure, high-performance API platforms. Strong in system design, database optimization, and technical leadership across cross-functional teams.

8+
Years
50+
Projects
90M+
Users Served

Skills & Expertise

Comprehensive technical skills across backend development, cloud infrastructure, and AI integration

Languages & Frameworks

Python 3.12FlaskDjangoFastAPIDjango REST Framework (DRF)JavaScriptSQLShell scriptingPL/SQL

API Development

REST APIsGraphQLWebSocketsAPI VersioningAPI GatewaysWebhooksMicroservices architecture

Async & Event-Driven

Redis QueueCelery WorkersRabbitMQAmazon SQSKafkaPub/SubWebSocket StreamingEvent-driven architectureCDC

Databases & Search

PostgreSQLSupabaseMySQLMongoDBOracleSQL ServerDynamoDBElasticSearchSQLiteDatabase connection pooling

Cloud & Infrastructure

AWS (EC2, Lambda, S3, SQS, SNS)GCPDigitalOceanSaladCloudMulti-region architectureAuto-scaling

DevOps & Containerization

DockerGitHub ActionsCI/CD pipelinesGitNGINXMulti-environment deployment

Security & Authentication

AES EncryptionJWTOAuth 2.0 (PKCE, OIDC)Auth0Basic AuthSecure coding practices

AI & Machine Learning

AI model deploymentGPU-based inference servicesModel accuracy trackingPerformance testingLLM integration

Monitoring & Observability

DatadogUUID-based request tracingStructured loggingError tracingPerformance tuningCircuit breaker logic

Professional Experience

8+ years of leading backend development and architecting scalable systems

Serves a global community of over 21 million users, providing advanced tools to make AI-generated content indistinguishable from human writing.

Key Highlights

  • Architected and led backend systems for a subscription-based AI platform supporting real-time and asynchronous operations
  • Designed scalable system architecture leveraging Redis, Celery, Supabase, and WebSockets for high-performance async communication
  • Deployed and managed machine learning services across SaladCloud, DigitalOcean, and AWS, ensuring performance and uptime
  • Oversaw integration of Supabase master/slave replicas, connection pooling, and database schema design for efficient scaling
  • Mentored and trained junior engineers, reviewed code, and enforced engineering best practices
  • Collaborated closely with Data Science and Frontend teams to align model outputs and user-facing features
  • Worked directly with executive leadership and top clients to debug API issues and deliver new platform capabilities
  • Maintained and enhanced observability with Datadog, including UUID-based request tagging for log tracing

Key Projects & Achievements

AI Models Deployment & Integration: Worked closely with Data Science team to convert AI algorithms to async APIs deployable on GPU instances
AI Model Accuracy and Performance Testing: Built tools to track AI model accuracy, performance, and expose metrics via dashboards
Async Architecture: Deployed real-time microservices using Redis, Celery, and FastAPI for async task execution
Load Testing and Auto-scaling: Tested newly developed services in auto-scaling environments (RPS) in worst-case scenarios before releasing to Prod
DB Connection Pool Optimization: 40% latency reduction in auto-scaled environments through connection pooling and monitoring
Subscription Access System: Built free/paid-tier workflows to control feature access by user subscription (Role-Based Access)
Full DB Migration: Migrated legacy Bubble DB data to Supabase via scheduled and on-demand events with zero downtime
Humanized AI Chat: Developed ChatGPT-style backend for streaming human-like responses via WebSockets & Redis
Dockerized Deployment: Containerized & launched 100+ standalone Humanizer services with circuit-breaker-based failover
Logging & Observability: Integrated UUID-traced logging and metrics for full-service visibility and debugging

Technology Stack

Python 3.12FlaskDjangoFastAPIRedisCeleryWebSocketsSupabasePostgreSQLDockerAWSGCPDigitalOceanSaladCloudDatadog

Featured Projects

Successfully delivered projects across healthcare, AI, e-commerce, and more

AI/ML

Undetectable AI

USA

AI platform serving 21M+ users for humanizing AI-generated content

Key Results

  • AI model deployment and integration
  • 40% latency reduction through DB optimization
  • 100+ GPU-powered microservices on SaladCloud
View Project
Deals & Discounts

The Entertainer

UAE

Lifestyle and discount platform with 5-environment deployment

Key Results

  • AES-encrypted API framework
  • 40% database load reduction
  • ElasticSearch for merchants and offers
View Project
E-commerce

OrangeShine

USA

Multi-tenant B2B commerce platform with global selling capabilities

Key Results

  • Real-time CDC from PostgreSQL to Elasticsearch
  • Multi-currency pricing engine
  • Zero-downtime database migration
Healthcare

Shaukat Khanum Hospital

International

Business Intelligence and data management platform for healthcare operations

Key Results

  • REST APIs with OAuth 2.0 authentication
  • Multi-environment Oracle data warehousing
  • HIPAA-compliant Power BI dashboards
View Project
Ticketing Platform

FanTicket

Brazil

Online ticket resale platform

Key Results

  • Secure payment processing
  • Real-time inventory management
  • Multi-region support
AI/ML

E&P Data Platform

USA

Subscription-based intelligent data platform leveraging AI models to deliver actionable insights and automated analysis for enterprise clients

Key Results

  • FastAPI-powered microservices architecture
  • PostgreSQL with optimized query performance
  • AWS infrastructure with API Gateway integration
  • Event-driven architecture using AWS EventBridge and Lambda

Frequently Asked Questions

Common questions about working together

Have more questions?

Get in Touch