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I'm an experienced Backend Engineer specializing in backend development and system design for distributed systems under heavy load. Beginning my career in 2013 with JavaScript and Node.js, I've evolved to use TypeScript and NestJS extensively, working on scalable and efficient backend systems. Alongside my main expertise, I've contributed to the open-source ecosystem and mastered cloud-native infrastructure and message queues. I started my professional journey as an iOS developer before progressing into backend development roles. Over time, I have played a key role in designing complex systems, including recommendation engines and real-time chat systems, integrating multiple databases and notification platforms. I value collaboration, solid architecture principles, and continuous improvement through adopting modern technologies and tools.…I'm an experienced Backend Engineer specializing in backend development and system design for distributed systems under heavy load. Beginning my career in 2013 with JavaScript and Node.js, I've evolved to use TypeScript and NestJS extensively, working on scalable and efficient backend systems. Alongside my main expertise, I've contributed to the open-source ecosystem and mastered cloud-native infrastructure and message queues. I started my professional journey as an iOS developer before progressing into backend development roles. Over time, I have played a key role in designing complex systems, including recommendation engines and real-time chat systems, integrating multiple databases and notification platforms. I value collaboration, solid architecture principles, and continuous improvement through adopting modern technologies and tools.

S. Behrad Kazemi

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I'm an experienced Backend Engineer specializing in backend development and system design for distributed systems under heavy load. Beginning my career in 2013 with JavaScript and Node.js, I've evolved to use TypeScript and NestJS extensively, working on scalable and efficient backend systems. Alongside my main expertise, I've contributed to the open-source ecosystem and mastered cloud-native infrastructure and message queues. I started my professional journey as an iOS developer before progressing into backend development roles. Over time, I have played a key role in designing complex systems, including recommendation engines and real-time chat systems, integrating multiple databases and notification platforms. I value collaboration, solid architecture principles, and continuous improvement through adopting modern technologies and tools.…I'm an experienced Backend Engineer specializing in backend development and system design for distributed systems under heavy load. Beginning my career in 2013 with JavaScript and Node.js, I've evolved to use TypeScript and NestJS extensively, working on scalable and efficient backend systems. Alongside my main expertise, I've contributed to the open-source ecosystem and mastered cloud-native infrastructure and message queues. I started my professional journey as an iOS developer before progressing into backend development roles. Over time, I have played a key role in designing complex systems, including recommendation engines and real-time chat systems, integrating multiple databases and notification platforms. I value collaboration, solid architecture principles, and continuous improvement through adopting modern technologies and tools.

Available to hire

I’m an experienced Backend Engineer specializing in backend development and system design for distributed systems under heavy load. Beginning my career in 2013 with JavaScript and Node.js, I’ve evolved to use TypeScript and NestJS extensively, working on scalable and efficient backend systems. Alongside my main expertise, I’ve contributed to the open-source ecosystem and mastered cloud-native infrastructure and message queues.

I started my professional journey as an iOS developer before progressing into backend development roles. Over time, I have played a key role in designing complex systems, including recommendation engines and real-time chat systems, integrating multiple databases and notification platforms. I value collaboration, solid architecture principles, and continuous improvement through adopting modern technologies and tools.

Skills

Experience Level

Expert

Expert

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Expert

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Expert

Expert

Expert

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Expert

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Expert

Expert

Language

English

Advanced

Work Experience

Senior Backend Developer at Algo Alliance

March 1, 2025 - Present

Played a key role in designing and implementing a recommendation system for a crypto-focused social media platform, including a personalized content delivery engine optimizing user engagement with crypto-related content. Led the design and development of a scalable, fully distributed real-time chat system using MongoDB, Kafka, Redis, and WebSockets supporting private and group messaging. Created detailed architecture diagrams, led effort estimations, improved backend performance, scalability, and reliability, and collaborated with cross-functional teams to align platform design decisions.

Senior Backend Developer at Smile Link

January 31, 2025 - August 9, 2025

Built an appointment scheduling system integrating dental clinic front desk software with the cloud for real-time synchronization and normalization of data. Developed data warehouse and unified integrations for multiple Practice Management Systems using edge-service pattern with rate-limited sync pools. Implemented patient relationship mapping and cleansing algorithms to improve record accuracy. Designed a multi-doctor scheduling system and a scalable distributed notification system via Twilio, SendGrid, and Firebase. Led the implementation of secure end-to-end encrypted patient-provider chat.

Backend Developer at ZarinPal (exnovin.io)

April 30, 2023 - August 9, 2025

Worked on key backend services including API exposure, scalable notification handling millions of transactions, streamlined service integration with an API library, and integrated advanced monitoring tools (OpenTelemetry, Prometheus, Grafana). Developed a generic mock API system to speed frontend development and led the adoption of NestJS architecture which significantly improved developer onboarding and codebase clarity.