Expected duration: less than 1 week I am looking for a highly capable freelancer to reverse engineer the check digit algorithm in a barcode formula.
I will provide full details via PPH messages, however please be informed that me and my team have been stuck on this problem for a few weeks - it is not a simple solution following any traditional check digit alg such as UPC or EAN. It's possible the alg used is inspired by UPC/EAN, so I would like to work with someone with experience in check digit calculation and/or barcodes.
I have a list of barcodes which work (i.e. have the correct check digit), however currently the only method to find the correct check digit is to test 0-9 manually which won't work long-term. Again, I will provide details if you are suited to the project.
If a solution is found it can be delivered via code in any language or as pseudocode. Python is preferred.
--
The proposed approach:
I send full details of the formula including working examples
The freelancer messages me if they find a solution
I send the freelancer a few barcodes to apply their alg to and they respond with the check digit
I test the barcode with the check digit to confirm it works
JavaScript Game Developer Needed Category: Animation, CSS, Frontend Development, Game Design, Game Development, HTML5, JavaScript, JQuery / Prototype, Svelte, Web Development Budget: $750 - $1500 USD
12-Jan-2026 22:55 GMT
Trendy Instagram Reels Video Editor Category: Adobe Premiere Pro, After Effects, Final Cut Pro, Social Media Marketing, Video Editing, Video Post Editing, Video Production, Videography Budget: ₹600 - ₹1500 INR
Advanced Photo Editing for Social Media Category: Adobe Lightroom, Photoshop, Background Removal, Graphic Design, Image Consultation, Image Processing, Photo Editing, Photo Retouching, Photoshop Design Budget: $10 - $30 USD
12-Jan-2026 22:51 GMT
User Input Mobile App (iOS & Android) Category: Android, API Development, Flutter, IOS Development, IPhone, Mobile App Development, PHP, React Native Budget: $250 - $750 USD
12-Jan-2026 22:51 GMT
Création d'application ERP avec Microsoft Power Apps Category: Agile Development, Data Entry, Database Management, Mobile App Development, PowerApps, Project Management, Software Documentation, Technical Support Budget: $250 - $750 CAD
