Skills

Communication JavaScript C# TypeScript Microsoft 365 Azure Functions Architecture Asp.Net Azure react node.js

Job Specifications

Microsoft Teams App Developer/Microsoft 365 Solutions Developer
Outside IR35 Contract Hybrid - High Wycombe
Contract: Outside IR35
Location: Hybrid (High Wycombe - on-site as required)
Start: ASAP
Duration: Initial contract with extension potential
The Opportunity
We are looking for an experienced Microsoft Teams App Developer to deliver a custom Real Time meeting, microphone, and voting system built directly into Microsoft Teams.
This project replaces traditional dedicated conference and voting hardware with a modern, software-based solution. You'll be building both the delegate-facing Teams app used in live meetings and the administrative control systems used to manage speakers, microphones, and voting in real time.
This is a specialist contract role requiring deep Microsoft Teams platform experience, Real Time systems knowledge, and strong enterprise UX instincts.
What You'll Be Working On
Delegate-Facing Teams Application
Design and build a custom Microsoft Teams meeting app/tab
Develop a clear, intuitive UI for live meetings, including:
Microphone request and speaker queue indicators
Live "Mic On/Mic Off" status
Dynamic voting interfaces (2-5 buttons depending on vote type)
Deliver Real Time visual feedback:
Vote open/closed states
Confirmation of submitted votes
Secret vs non-secret voting behaviour
Ensure the app is reliable, accessible, and easy to use in high-pressure live meeting environments
Administrative Control & Backend Systems
Build Back End services allowing administrators (ACCS) to:
Start, end, and manage votes
Define vote types, labels, and rules
View live vote counts and participation
Identify or anonymise delegates depending on vote configuration
Implement role-based access control:
Ensure only eligible delegates can vote
Support inclusion/exclusion logic based on delegate data
Develop secure, scalable APIs and Real Time communication layers
Microsoft Teams Platform Integration
Integrate with Microsoft Teams meeting context and lifecycle
Handle user and meeting identity
Integrate microphone and mute state (within Teams platform constraints)
Manage speaker queues and live meeting state
Work pragmatically within Teams SDK limitations while delivering a robust UX
Technical Environment
Front End
React
TypeScript
Microsoft Teams JavaScript SDK
Fluent UI
Backend & Cloud
ASP.NET Core (C#) or Node.js
Azure Functions and/or Azure App Service
Azure SignalR or WebSockets
Microsoft Graph API (Teams, users, meetings)
Architecture & Concepts
Real-time systems
Role-based identity and permissions
Secure enterprise authentication
High-availability, fault-tolerant design
What We're Looking For
Essential
Proven experience building custom Microsoft Teams applications
Strong Microsoft 365 and Azure experience
Solid React and TypeScript skills
Backend API development experience (C#/.NET or Node.js)
Experience with Real Time communication patterns
Strong enterprise UX mindset - clear, accessible, and foolproof
Ability to work with platform constraints and still deliver reliable solutions
Nice to Have
Experience with conference, event, or voting systems
Government, parliamentary, or regulated environments
AV/IT hybrid systems
Security-sensitive or high-availability platforms
Why This Contract
Outside IR35
Technically interesting, specialist Teams development
Real-time systems rather than CRUD apps
Clear deliverables and genuine engineering challenges
Hybrid working with flexibility (High Wycombe)

About the Company

Lynx is a well established, privately owned, UK based recruitment firm that enjoys successful working relationships with some of the UK's leading companies and SMEs. We believe that hiring people into their dream job can genuinely change their lives for the better. And companies hiring the right talent can be crucial to achieve goals, grow and improve their overall results. Our specialised business units provide IT Technical, IT Sales, Project Management, Finance, Engineering, Marketing and HR staff across the UK and int... Know more