Backend Developer

Respina Network & Beyond, Tehran, Iran Aug 2022 – Mar 2024

Technologies & Tools: Python, Django, Flask, RESTful APIs, Celery, RabbitMQ, PostgreSQL, Docker, Kubernetes, Git, CI/CD (GitLab CI), Prometheus, Loki, Grafana, Linux, Nginx, Troubleshooting & Performance Optimization

Respina is a leading provider of telecommunications solutions in Iran, offering dedicated internet access, SIP-Trunk, Hosted-PBX phone services, and data center colocation. Trusted for reliability and innovation, Respina enables seamless connectivity and robust communication for businesses, contributing to Iran's digital infrastructure and economic growth. This was one of the most impactful periods of my career, where I gained deep hands-on experience in analyzing, testing, and optimizing large-scale backend systems. As part of the Hosted-PBX (Nexfon) team, I worked on improving the performance, scalability, and reliability of enterprise-grade telecommunication services. Redesigned and optimized the billing system using CGRATES, implementing a real-time charging solution that improved billing accuracy and efficiency. Reduced monthly reporting time from 30 minutes to 40 seconds by optimizing database queries, parallelizing tasks with Celery, and improving data aggregation workflows. Refactored the Asterisk-ARI integration into an event-driven Flask microservice, containerized with Docker, and enhanced with multi-processing, increasing concurrent call capacity per instance from 25 to 130 and reducing infrastructure load by nearly 5×. Implemented comprehensive monitoring and troubleshooting using Prometheus, Loki, and Grafana, improving observability and system reliability. Collaborated with the DevOps team to migrate deployments to a Kubernetes-based cloud infrastructure, enhancing scalability, fault tolerance, and CI/CD automation.

Backend Developer

ANIL Web design studio, Tehran, Iran Nov 2021 – Jul 2022

Technologies & Tools: PHP, Laravel, JavaScript, CSS3, HTML5, RESTful APIs, Postman, MySQL, Git, Docker, Linux, Nginx, Agile Collaboration

Collaborated with a highly skilled development team composed of top university talents, gaining valuable exposure to modern software design practices and collaborative workflows. Contributed to two major web projects — RadmanPack and PelikanIran — by developing and integrating backend systems using PHP and the Laravel Framework, while coordinating closely with frontend developers working in React.js. Focused on designing RESTful APIs, implementing secure authentication, and ensuring smooth data exchange between backend and frontend components. Additionally, gained hands-on experience in version control (Git), containerization with Docker, and deployment on Linux-based environments, emphasizing maintainability, scalability, and team collaboration.

Backend Developer

AvinAvisa Lab, Tehran, Iran Oct 2020 – Jul 2021

Technologies & Tools: Node.js, Express.js, MongoDB, JavaScript, Blockchain Integration (Ethereum, TRON), RESTful APIs, Git, Docker, Linux, WebSocket Communication

Worked in a research-driven environment within the Blockchain Laboratory of Amirkabir University of Technology, focusing on the development of decentralized systems and blockchain-based applications. Contributed to the design and implementation of a cryptocurrency exchange platform (Polychain) enabling peer-to-peer trading with advanced matching logic based on trade volume, customer tier (VIP levels), and other dynamic factors. Implemented a custom matching algorithm inspired by the Knapsack problem, optimizing trade pair selection and transaction efficiency. Additionally, integrated the platform with Ethereum and TRON networks, handling blockchain interactions and ensuring secure, real-time transaction processing. Collaborated with a small, multidisciplinary team, applying the MERN stack (MongoDB, Express.js, React.js, Node.js) and blockchain APIs to build a robust, scalable backend system.

Military Service

Army, Tehran, Iran Jul 2018 – Jul 2020

In Iran, military service is compulsory for men and must be completed in order to obtain permission to leave the country. The service lasts for two years. During this period, I collaborated with Dr. Moosaei (Charles University) and Dr. David Musicant (Carleton College) on one publication and one research project, while also engaging in self-study in machine learning and image processing to enhance my technical expertise.

Android Developer

Ishaya, Tehran, Iran Aug 2016 – Apr 2018

Technologies & Tools:Java, Android SDK, RESTful APIs, MySQL, Git, XML, Material Design

Started my professional journey in software development as an Android Developer, initially joining as an intern and later continuing as a full-time engineer due to strong performance and enthusiasm for mobile technologies. Contributed to the development of Ponila, the first intelligent content recommendation system for Persian-language users. The platform utilized semantic and syntactic analysis of Persian text to deliver personalized article recommendations based on user interests, improving content discovery and engagement. Collaborated with backend and data science teams to integrate recommendation algorithms and ensure seamless data synchronization between the mobile app and server-side APIs. Focused on building a responsive, stable, and scalable Android application aligned with modern UI/UX principles.