Senior Outlook Add‑in Developer

Oscar Associates Limited; South Yorkshire; Hybrid; GBP 80,000 - 100,000; Part time

Job summary

A technology consulting firm is seeking a Senior Outlook Add-in Developer for a 10-month contract in South Yorkshire. This hybrid role involves architecting and developing Outlook add-ins within an enterprise-scale messaging environment, focusing on cross-platform consistency. Candidates should have demonstrated experience with Microsoft frameworks, API integrations, and collaboration in agile teams. An engaging work environment with a strong emphasis on technical excellence is offered, along with competitive daily rates.

Qualifications

• Proven experience delivering Outlook add-ins in enterprise environments.
• Strong understanding of Microsoft Graph and Azure Active Directory.
• Ability to work collaboratively in cross-functional teams.

Responsibilities

• Architect and develop robust Outlook add-ins using modern tools.
• Ensure compatibility across desktop, browser, and mobile clients.
• Connect add-ins to backend systems and maintain technical documentation.

Skills

Experience with Microsoft frameworks

Cross-platform development

API integration

Agile methodology

Job description

Overview

Senior Outlook Add-in Developer | £500-£550p/day (Inside IR35) | S.Yorkshire | (Hybrid, 2/3 days in office) | 10 month contract

Our client is looking for an experienced Outlook Add-in Developer to help support add-in solutions within an enterprise-scale messaging environment. The focus of the role will be building robust, cross platform Outlook add-ins that perform across Windows, macOS, web and mobile clients.

It'll be an Exchange landscape that's both on-premises infrastructure and Microsoft 365, where you will collaborate closely with engineering, product and operations teams in an agile delivery model.

What you\'ll be doing

• Architecting, developing, and enhancing Outlook add-ins using modern Microsoft frameworks and tools
• Ensuring add-ins deliver a consistent experience across all Outlook clients, including desktop, browser, and mobile
• Connecting add-ins to backend systems, APIs, and identity services such as Microsoft Graph and Azure Active Directory
• You\'ll be working closely with product owners, architects, QA, and operations
• Maintaining compatibility across Exchange on-premises and Exchange Online deployments
• Producing and maintaining technical documentation, design guidelines, and development standards

What we\'re looking for

• You can demonstrate experience delivering Outlook add-ins within ente...