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Fiverr Pro
English
$
USD
I will design and develop your macos or windows desktop software
Mengyu Wang
About this gig
Turn a written specification or business workflow into dependable desktop software for macOS or Windows. I design and develop focused utilities, internal tools, API clients, and production-ready desktop applications.
Services include menu-bar or system-tray utilities, file processing and data conversion, local storage, import and export, API-connected clients, internal business software, automation tools, tested source code and a concise delivery note.
Basic delivers one single-purpose utility for one operating system. Standard delivers a small multi-screen application. Premium delivers a scoped desktop product with UI design, data, API integration, testing and one distributable build. Installer packaging for Basic or Standard is available as a Gig Extra. Cross-platform delivery, code signing, notarization, store submission and larger systems use an Extra or written custom offer.
Most projects can be confirmed through Fiverr messages and written specifications. Please message me before ordering so I can confirm scope and acceptance criteria.
Current availability promotion: listed Gig Extras are set at 50% of my standard functional rates. Package prices remain unchanged.
Get to know Mengyu Wang
Mengyu Wang
Full Stack Salesforce App and AI Developer
- FromJapan
- Member sinceSep 2026
Languages
Chinese, Japanese, English
I am a Japan-based full-stack software engineer with 20 years of experience designing and delivering Salesforce solutions, web and mobile products, desktop software, AI integrations, and Godot mini games. I work with Apex, Lightning Web Components, Flow, REST APIs, TypeScript, Flutter, Swift, databases, and cloud services. I have published two iOS apps and operate a production web platform. I turn written requirements into tested, maintainable products and communicate clearly through Fiverr messages, concise progress updates, and practical delivery documentation.
Other Software Development Services I Offer
FAQ
Do we need a video call before you start?
No. Most projects can be confirmed through Fiverr messages, written specifications, screenshots, and repository access.
What do you need from me before I order?
Please send your business goal, required features, acceptance criteria, target platform, relevant designs or assets, and existing system constraints. I will confirm the correct package or custom offer before you order.
What counts as one revision?
One revision means one consolidated round of changes within the originally agreed scope. New screens, workflows, components, integrations, or changed business requirements are quoted separately.
Do you provide support after delivery?
Yes. For 14 days after delivery, I will correct defects caused by my implementation free of charge when they remain within the agreed acceptance criteria. New or changed requirements are not defect corrections.
Will I receive the source code and ownership?
Yes. The completed source code and project files are included. Ownership of newly created custom work transfers after payment. Existing open-source libraries, licensed assets, and third-party services remain subject to their original licenses.
How do you handle credentials and confidential data?
Please provide temporary, least-privilege project access whenever possible. Do not send production passwords, private keys, or sensitive customer data in ordinary messages. Access should be revoked after acceptance.
Are third-party fees included in the package price?
No. Hosting, cloud usage, API charges, paid plugins, licenses, and commercial assets are paid by the client unless explicitly included. I will not activate a paid service without approval.
Which desktop platforms do you support?
I develop for macOS and Windows using native or cross-platform technology. Linux support can be included when agreed before ordering. Please provide every required operating system and minimum version.
Will you provide an installer and signed application?
I can provide the agreed application build and installer. Code signing, notarization, and store submission require the client’s developer account, certificates, and approval. Platform fees are not included.
What kinds of desktop tools can you build?
I build productivity tools, menu-bar or tray utilities, internal business applications, data-processing tools, API clients, file-management utilities, dashboards, and focused applications based on a written specification.
