Reza Nasri

Backend Engineer — Python, Django, distributed data systems
Tehran, Iran

rezanasri@outlook.com | LinkedIn | GitHub

Four years building data-intensive backends in e-commerce and media — marketplaces, checkout, product catalogues and high-volume event ingestion. Comfortable at the layer most application work skips: event logs, columnar stores, partitioning and replication trade-offs, asynchronous messaging, and the failure modes that come with them.

Experience

Backend Engineer — Digify (Digikala Group)

October 2025 – Present, Tehran

• Store-first marketplace platform integrating third-party e-commerce systems into the Digikala SuperApp — Django, Celery, Elasticsearch.
• EventStore service on ClickHouse for user-activity logs, and the derived views driving on-platform personalization (Two-Tower retrieval, Epsilon-Greedy exploration).
• Buy with Digikala — checkout as a shared service, integrated through Digikala SSO.

Focused Self-Study — Career Break

April – September 2025

• Distributed data systems — replication, sharding, transaction isolation, batch and stream processing (Designing Data-Intensive Applications, 2nd edition).
• Microservice architecture — DDD, sagas, event sourcing, CQRS, API gateway, transactional outbox (Microservices Patterns).
• Kafka, KrakenD, Neo4j and GraphRAG, Python asyncio, Go, agentic AI frameworks.

Back-End Developer — GSM

February 2024 – March 2025, Tehran

• Redesigned the GSM.ir schema and server-side API into product-catalogue infrastructure, reworking normalization and indexing around the real query patterns.
• Geo-search engine for locating local stores with live availability and pricing.
• Marketplace and ordering platform with pickup or delivery from verified stores.
• Saleor customization (Django, GraphQL) for a B2B ordering platform; Metabase BI layer.

Data Engineer — Prism-AI

December 2023 – March 2024, Tehran

• Distributed batch pipeline — Airflow orchestration, Celery workers, Docker Swarm, PyTorch.
• Backend service (REST API, database schema) with Django, DRF and PostgreSQL; MinIO object storage.

Back-End Developer — ZeePlay

November 2022 – June 2023, Tehran

• Event-based logging pipeline on Kafka with MongoDB and a Sanic async ingestion service.
• VOD and live-streaming infrastructure — FFmpeg, Celery, MinIO, media segment file server.
• Backend server (REST API, PostgreSQL schema) with Django and DRF.

Technical

Languages

Python (advanced), Go, SQL

Backend

Django, Django REST Framework, Celery, Sanic, asyncio, REST API design

Data

PostgreSQL, ClickHouse, Kafka, Elasticsearch, MongoDB, Redis, MinIO

Architecture

Replication and sharding, transaction isolation, event sourcing, CQRS, sagas, transactional outbox, change data capture, idempotency, observability

Machine learning

PyTorch, scikit-learn, Pandas, recommender systems, Apache Airflow, MLflow

Operations

Docker, Git, Linux

Reading

• Designing Data-Intensive Applications, 2nd edition — Martin Kleppmann (2026)
• Microservices Patterns — Chris Richardson (2018)
• Deep Learning — Goodfellow, Bengio, Courville (2015)
• Pattern Recognition and Machine Learning — Christopher Bishop (2006)

Education

B.Sc. Biomedical Engineering (Bioelectric) — University of Isfahan, 2017 – 2022

Publication

“Addressing inter-device variations in optical coherence tomography angiography: will image-to-image translation systems help?” (2023)