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Muhammad Sajid
@sajidproapps
Mobile App Developer and Python Data Cleaning Expert, Excel and CSV Pro
Pakistan
English, Hindi, German, Ukrainian
About me
Hello! I'm Muhammad Sajid, a BS Software Engineering graduate and software developer offering two core services:
Mobile App Development — Android and Flutter apps built with Java, Kotlin, Dart, and XML, integrated with Firebase, MySQL, and SQL databases. Multiple Play Store-ready apps delivered.
Data Cleaning and Formatting — Excel, CSV, and Amazon seller data cleaned using Python and Pandas. I fix duplicates, formatting errors, and missing values, and merge messy spreadsheets into clean, analysis-ready reports.
Reliable, high-quality work with clear communication.
Skills
Muhammad Sajid
Offline •
Average response time: 1 hour
See my services
Cross-Platform Development
I will be your expert android developer, mobile app, ai app developer
Custom Websites
I will develop a custom full stack website with front end and back end development
Portfolio
Work experience
Mobile App Developer
RISA Tech Services • Freelance
Dec 2022 - Nov 2025 • 2 yrs 11 mos
Worked as an Android Developer focusing on native Android application development using Java. Responsibilities included developing custom Android apps, implementing Material Design UI, integrating REST APIs, and working with Firebase services such as authentication and push notifications. Contributed to bug fixing, performance optimization, and UI/UX improvements while following MVVM architecture and clean coding practices. Collaborated with the team to deliver stable, scalable, and Google Play Store–ready Android applications within project requirements and timelines.
4 Reviews
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
1-4 out of 4 Reviews
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Most relevant
pobazuaye
United States
Ongoing collaboration
I am ver satisfied with Sajid expertise and commitment to excellent job
Helpful?
pobazuaye
United States
Ongoing collaboration
I thank Sajid for the work he has done for me so far, I have required a very high standard of professionalism from him and he has delivered beyond my expectations, most importantly he did not shy away from tough conversation. So yes, I recommend him
Helpful?
pobazuaye
United States
Ongoing collaboration
Thanks Sajid, your professionalism and attention to what your customer wants is really appreciated
Helpful?
vincent_thay
United States
Fast delivery, excellent communication, and top-quality results. Highly recommended!
Helpful?
