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Nicolas M.
@OscarMozo
5.0
4
5.1
5.1
100%
Automation Expert | Google Sheets, Excel, Python
$75 USD / Hour
・
Paraguay (1:17 PM)
・
Joined on November 4, 2019
$75 USD / Hour
・
** Top-rated freelancer on Upwork. ** -- See proof below. (First portfolio item)
YouTube Channel = [login to view URL]
⭐️⭐️⭐️⭐️⭐️ "Nicolas is working in a clean, efficient way. Understands instructions well and is able to further improve on them and provide an excellent end result. Great, pleasant communication. Reliable. Can definitely recommend!"
⭐️⭐️⭐️⭐️⭐️ "Excellent communication. Revised work as needed. Understood my goals completely. Highly recommend. Would work with Nicolas again."
I help businesses save time, reduce costs, and gain real-time insights by combining the power of Google Sheets, Excel automation, Python scripting, and custom API integrations.
Whether you’re looking to:
• Automate data transfer between spreadsheets, third-party platforms, and custom Python scripts
• Create custom dashboards that pull in live data from CRMs, accounting tools, or marketing services
• Implement advanced scripting to manage large datasets and keep them accurate
• Or simply take your Google Sheets / Excel workflows (and Python-based processes) to the next level…
I can help turn your processes into efficient, automated systems—freeing up your time to focus on strategy and growth.
Core Competencies
✅ Google Sheets Automation & Apps Script
• Creating macros, triggers, and custom interfaces that streamline day-to-day tasks and eliminate manual data entry.
✅ Excel & VBA
• For teams operating in Excel, I can automate workflows in Excel using VBA—compatible with both Windows and macOS versions.
✅ Python Automation & Scripting
• Leveraging Python’s powerful libraries (such as pandas, requests, and more) to automate data processing, build custom integrations, and develop scalable solutions for business intelligence and data analysis.
✅ API Integrations
• Connecting spreadsheets to external services (CRMs, e-commerce platforms, marketing tools) so your data flows seamlessly and updates in real time.
✅ Custom Workflow Solutions
• Designing end-to-end solutions—from data ingestion and validation to generating insightful reports—all powered by Google Sheets, Excel, or integrated Python scripts.
✅ Data Manipulation & Reporting
• Building dynamic dashboards, complex formulas, and advanced logic to transform raw data into actionable insights.
Ready to Supercharge Your Workflows?
If you need API-driven, Google Sheets/Excel/Python–centric solutions that slash manual work and give you instant, accurate data, let’s talk! I’d love to learn more about your project and collaborate on building a high-impact system tailored to your needs.
Feel free to review my portfolio and live demos to see examples of my work in action. Then, invite me to your job or message me directly so we can get started.
Looking forward to partnering with you!
It's been a great experience working with Oscar all the way through. He's been very precise from the very beginning with regards to pricing, timelines and the ease of communication was the best I've experienced. He was always available to talk on short notice regarding the changes to the project. He is very knowledgeable in APIs and backend but most importantly he was very helpful in building a streamlined architecture.
Nicolas really know what to do, as we have more plans to hire him again, id you are looking for a professional developer then he is the one to go for! Highly recommended!
We hired Oscar on Freelancer to integrate our Shopify with an API, and he did an outstanding job. He understood the task quickly and made everything work perfectly on the first attempt, showing his exceptional expertise. He also provided a detailed guide and video explanation for future reference. It's rare to find such a reliable and skilled freelancer nowadays. Highly recommended for anyone seeking a true expert who delivers on their promises!
Ayman K.
@aymankaddoura1
•
Sharjah, United Arab Emirates
•
5 months ago
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Experience
Google Sheets Developer | Google Apps Script | API Integrations
Jan, 2019 - Present
•
6 years, 1 month
Freelance
Jan, 2019 - Present
•
6 years, 1 month
Google Sheets | Google Apps Script | Automation | API Integrations
Jan, 2019 - Present
•
6 years, 1 month
Financial Analyst
Jan, 2017 - Dec, 2021
•
4 years, 11 months
TATA CONSULTANCY SERVICES
Jan, 2017 - Dec, 2021
•
4 years, 11 months
Financial Analyst
Budapest, Hungary
Jan, 2017 - Dec, 2021
•
4 years, 11 months
Education
Master in Computer Science / École 42
2022 - 2023
•
1 year
France
2022 - 2023
•
1 year
Finance / BPP Business School
2015 - 2019
•
4 years
United Kingdom
2015 - 2019
•
4 years
Qualifications
Data Science Certification
2023
IBM
Data Science Certification
2023
Certifications
Freelancer Orientation
P
Preferred Freelancer Program SLA
Python
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