Adnan Khan

I help businesses build, scale, and stabilize production-ready backend systems, cloud infrastructure, APIs, microservices, and DevOps workflows.

At a glance:

5+ years of backend and platform engineering experience
Strong in Node.js, TypeScript, Nest.js, Python, FastAPI, AWS, Kubernetes, Postgres, Redis, Docker, and Terraform
Built and operated systems handling 500–800 requests per second
Improved query performance from 30+ seconds to under 1 second
Reduced cloud infrastructure costs by around 25%
Reduced production incident recovery time from around 45 minutes to under 10 minutes
Experienced with high-traffic, cloud-based, distributed, and mission-critical systems
Services I Offer
Backend Development

I can design and build reliable backend systems, APIs, and server-side applications from scratch or improve existing systems.

This includes:

REST API development
Node.js, TypeScript, Nest.js, Express.js development
Python and FastAPI backend development
Database design and optimization
Authentication and authorization systems
Admin dashboards and internal tools
Payment integrations, including Stripe
Webhooks, background jobs, queues, and scheduled tasks
Secure and maintainable backend architecture
API & Microservices Architecture

I help companies move from slow, hard-to-maintain systems to cleaner, scalable service-based architectures.

This includes:

Monolith to microservices migration
Service decomposition
API gateway design
Cross-service communication
Idempotency, retries, rollback, and compensation logic
Distributed workflow orchestration
Event-driven systems using queues and messaging
Cloud Infrastructure & DevOps

I can set up, improve, and manage cloud infrastructure for modern applications.

This includes:

AWS infrastructure setup and optimization
Docker containerization
Kubernetes and EKS deployments
ECS, Lambda, S3, CloudFront, Route 53, IAM, and Secrets Manager
Terraform and Helm-based infrastructure
CI/CD pipelines using GitHub Actions and ArgoCD
Blue-green and canary deployments
Zero-downtime deployment workflows
Performance Optimization

I specialize in finding and fixing bottlenecks in slow or unstable backend systems.

This includes:

Database query optimization
Postgres indexing and connection pooling
Redis caching
Reducing API response times
Fixing N+1 queries
Load handling and burst traffic management
Rate limiting and graceful degradation
Improving system reliability under high traffic
Observability, Monitoring & Production Debugging

I can help teams understand what is happening inside their systems and resolve issues faster.

This includes:

Logging, monitoring, and tracing setup
Prometheus and Grafana dashboards
Jaeger distributed tracing
Datadog and ELK stack integration
Production debugging
Incident investigation
Reliability improvements
Alerting and health checks
Workflow Automation & Background Processing

I can build reliable systems for complex workflows, background jobs, and long-running processes.

This includes:

Temporal workflows
AWS Step Functions
Queue-based processing
Retry systems
Job scheduling
Async task workers
Failure recovery
Partial resume and stateful workflow execution
Data, Search & Messaging Systems

I can build and improve systems that depend on fast data access, search, and messaging.

This includes:

Postgres, MongoDB, DynamoDB, and Redis
Elasticsearch search optimization
Kafka-based messaging pipelines
Data processing workflows
ETL pipelines using AWS Glue
Secure data handling with IAM and encryption
Specialized Engineering Work

I also have experience with more advanced technical systems, including:

Real-time collaboration features using WebSockets
PDF annotation and synchronization systems
Video rendering platforms using FastAPI, FFmpeg, async workers, and GPU processing
Distributed compute systems for authorized security research and educational platforms
Best Fit Projects

I am a strong fit for projects where you need someone to:

Build a backend system from scratch
Fix a slow or unstable backend
Scale an existing application
Migrate to microservices
Set up AWS, Docker, or Kubernetes infrastructure
Improve deployment pipelines
Reduce cloud costs
Add monitoring and observability
Optimize databases and APIs
Build secure internal tools, portals, SaaS platforms, or automation systems
Why Work With Me

I focus on building systems that are not just functional, but also reliable, scalable, maintainable, and production-ready. I have worked on real-world systems with high traffic, strict availability needs, complex workflows, and cloud infrastructure requirements.

My approach is practical: I identify the highest-impact problems first, improve performance where it matters, simplify architecture where possible, and make sure the system is easier to operate after the work is done.

Technologies

Backend: Node.js, TypeScript, Nest.js, Express.js, Python, FastAPI
Databases: Postgres, MongoDB, DynamoDB, Redis
Cloud: AWS, EKS, ECS, Lambda, S3, RDS, CloudFront, Route 53, IAM
DevOps: Docker, Kubernetes, Terraform, Helm, GitHub Actions, ArgoCD
Monitoring: Prometheus, Grafana, Jaeger, Datadog, ELK Stack
Messaging & Workflows: Kafka, Temporal, AWS Step Functions
Testing & Quality: Jest, production debugging, performance tuning

Service Summary

I offer backend development, cloud engineering, DevOps, Kubernetes, AWS infrastructure, API development, database optimization, microservices, workflow automation, and production system reliability services for startups, businesses, SaaS products, internal platforms, and high-traffic applications.