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I will develop office excel addin
Bilal
Level 2
About this gig
I am a senior Excel Add-in developer with 5+ years of experience building custom enterprise Microsoft Excel Add-ins using modern web technologies.
I build fully customized Excel Add-ins that run on Windows, Mac, Android, iPad, and Web delivering powerful functionality right inside your spreadsheet.
What I deliver:
- Custom Task Panes, Ribbon buttons, Context Menus
- Custom Functions & Formulas callable directly in cells
- AI-powered Add-ins ChatGPT/OpenAI smart automation and workflows
- REST API, MS Graph, SharePoint, ERP/CRM and SQL integration
- VSTO Add-ins for deep Windows desktop Excel integration
- Full project lifecycle idea to deployment and ongoing upgrades
Tech: React.js · TypeScript · Office.js · Fluent UI · C# · VSTO · ASP.NET · MS Graph · Node.js · SQL
All add-ins are fully tailored to your needs with clean code, testing, documentation, and post-delivery support.
Message me first best quality at a very affordable price!
Get to know Bilal
Bilal
Microsoft Office Add in Developer and Automation Expert
Level 2
- FromPakistan
- Member sinceOct 2022
- Avg. response time1 hour
- Last delivery2 weeks
Languages
English
I'm Bilal, a Microsoft Office 365 developer with 5 plus years of experience building custom Add ins and automation solutions for Excel, Word, Outlook, and PowerPoint. I develop secure and scalable solutions using Office.js, VSTO, React, Next.js, Express.js, C#, .NET, Node.js, and Microsoft Graph API. I help businesses automate workflows, integrate APIs, improve productivity, and build reliable Microsoft 365 solutions tailored to their needs.
My Portfolio
FAQ
Can the add-in work on Mac and Web, not just Windows
es! I build cross-platform Excel Add-ins using Office.js that run on Windows, Mac, iPad, Android, and Excel on the Web.
Can you integrate AI / ChatGPT/ Claude into my Excel Add-in?
Absolutely. I have hands-on experience integrating OpenAI & Claude APIs for smart automation, content analysis, and intelligent workflows directly inside Excel.
What is the difference between Office JS and VSTO?
Office.js Add-ins are cross-platform and web-based. VSTO Add-ins are Windows-only but offer deeper Excel integration. I build both — message me and I'll recommend the right approach for your needs.
Can you connect my add-in to my existing ERP or CRM system?
Yes. I have strong experience integrating Excel Add-ins with third-party systems including ERP, CRM, REST APIs, MS Graph, SharePoint, and SQL databases.
Do you provide support after delivery?
Yes. Every package includes post-delivery support. I also offer ongoing upgrades and maintenance beyond the included support period.
Can you build a custom formula or function I can use directly in Excel cells?
Yes! Custom Functions (also called Lambda or custom formula add-ins) are one of my specialties — your team can call them just like native Excel formulas.
