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waleed khan

@waleedkhan5

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Senior Backend Engineer building high-performance distributed systems and scalable APIs.

Pakistan

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What I'm looking for

I’m looking to build resilient, real-time distributed backend systems—scalable APIs, messaging, and financial-grade reliability—using Go/Rust and modern cloud/CI practices, with teams that value clean architecture, TDD, and rigorous code reviews.

I’m a Senior Backend Engineer with 8+ years specializing in high-performance distributed systems, financial gateways, and scalable API architecture. I’ve optimized system throughput by 50% and engineered resilient, real-time platforms using Kafka and NATS.

In recent roles, I’ve architected backend services in Go, Python, and Rust with clean architecture and testable modular structures, and built secure APIs (REST, WebSockets) for 10,000+ concurrent transactions. I’ve also improved messaging resiliency and throughput with Kafka, NATS, and RabbitMQ, and tuned PostgreSQL, MongoDB, and Redis for data-intensive performance—while standardizing quality through CI/CD, TDD, and rigorous code reviews.

Experience

Work history, roles, and key accomplishments

Current

Senior Backend Engineer

Current

ITArcus

Aug 2023 - Present (2 years 9 months)

Architected and maintained backend services in Go, Python, and Rust, building secure REST and WebSocket APIs for real-time workloads handling 10,000 concurrent transactions. Improved distributed messaging resiliency and message throughput using Kafka, NATS, and RabbitMQ, and optimized PostgreSQL, MongoDB, and Redis data-intensive operations.

Go Rust REST APIs WebSockets Kafka NATS RabbitMQ PostgreSQL MongoDB CI CD

Senior Software Engineer

Avanza Solutions

Jan 2020 - Jul 2023 (3 years 6 months)

Engineered a high-availability C++ payment gateway processing millions of transactions using optimized multithreading and asynchronous workflows. Increased processing speeds by 50% through architectural improvements, load balancing, and database optimizations, while ensuring 24/7 reliability, failover, and proactive monitoring.

C++Multithreading Asynchronous Payment Gateways Load Balancing Database Optimization High Availability Monitoring

Software Engineer

Minimalist Developers

Sep 2015 - Nov 2020 (5 years 2 months)

Built robust Android applications in Kotlin, integrating Firebase NoSQL with real-time synchronization features. Implemented secure user authentication and cloud-based data management for mobile platforms.