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Oswaldo Alcalá

@oswaldoalcal

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Data engineer focused on backend APIs and real-time extraction using Python.

Venezuela

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What I'm looking for

I want to build efficient, high-quality backend and data extraction systems—especially where realtime APIs, scraping pipelines, and scalable automation matter—while continuing to grow toward data science and machine learning.

I’m a Data Engineer / Web Developer with 4+ years of experience building backend systems for data extraction, REST APIs, and testing, with a strong interest in data science and machine learning. I’ve worked on several backend projects using Python and modern web frameworks to deliver reliable, scalable solutions. I enjoy creating elegant systems that improve efficiency and quality.

Recently, I’ve built and maintained backend services with Sanic and Django, including realtime data streaming with WebSockets and configurable parsers that automate and schedule tasks. I’ve also created scraping and data cleaning pipelines with Scrapy and built data extraction systems for large-scale platforms—always emphasizing maintainability, debugging, and performance.

Experience

Work history, roles, and key accomplishments

Scrapy Data Extraction Dev

Move To The Bit

Aug 2020 - May 2022 (1 year 9 months)

Built multiple web data extraction scripts with Scrapy for different websites and saved generated reports to an Amazon S3 bucket. Deployed systems using Docker and supported back-end development with Django.

Python Scrapy Web Scraping AWS S3 Docker Django Data Extraction Reporting

Scrapy Data Extraction Dev

Recruit.net

Oct 2018 - Dec 2021 (3 years 2 months)

Created a data extraction system that crawled and extracted data from multiple ATS for a job search and HR data analytics platform. Performed data cleaning and normalization and handled ongoing maintenance and debugging of the extraction system.

Python Scrapy Web Automation Data Extraction Data Cleaning Data Normalization Debugging JSON

Education

Degrees, certifications, and relevant coursework

Self Education

2017 -

Self-directed learning of programming and data extraction skills from 01/2017 to the present, including Python and related technologies. Used effort and consistency to build capabilities that supported early career opportunities.