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Demir Sacirovic

@demirsacirovic

Python Backend Engineer at Perk and Merakly, who improved scraping success to 99% and cut a full run from 8 hours to 45 minutes.

Serbia

Message

What I'm looking for

I'm available for B2B contract work.

At Merakly, I improved an e-commerce scraping pipeline’s success rate from 75% to 99% and cut a full run from 8 hours to 45 minutes using async processing, Celery workers, and Redis caching. I also built scrapers combining vendor APIs and public storefronts.

At Perk, I built and maintained third-party supplier API integrations for an enterprise platform, including REST and SOAP clients with OAuth2 token refresh. As an independent contractor, I develop Python scraping services and tests, and contribute to a hybrid-search RAG system using Qdrant, FastAPI, and SvelteKit.

Experience

Work history, roles, and key accomplishments

Current

Backend & Web Scraping Engineer

Current

Independent Contractor

Jul 2026 - Present (3 months)

Developed and maintained backend web scraping services in Python, with automated tests and CI/CD pipelines. Added observability with Grafana dashboards and monitoring for scraper health.

Python Web Scraping CI CD Grafana Docker Compose fastAPI SvelteKit Qdrant BM25 RAG XML APIs

Current

Docent (Assistant Professor)

Current

University of Belgrade, Faculty of Education

Jan 2023 - Present (3 years 9 months)

Teach geosciences and run research projects using Python, SQL, and Pandas. Lead the Erasmus+ KA220 project EduAId (2025–2027).

Python SQL Pandas Research Teaching

Python Software Engineer (Backend Integrations)

Perk

Oct 2025 - Feb 2026 (4 months)

Built and maintained third-party supplier API integrations (REST/SOAP) for an enterprise platform. Implemented resilience patterns including circuit breaker, exponential backoff with jitter, rate limiting, and webhook idempotency.

Python REST SOAP OAuth Pydantic Httpx AsyncIO Docker AWS ECR MongoDB PostgreSQL Test Driven Development Scrum

Python Developer

Merakly

Jan 2023 - Sep 2025 (2 years 8 months)

Developed web scraping and backend solutions for international clients, including e-commerce scraping at scale and price monitoring systems. Improved scraping success rates and performance significantly.