M365 Developer

INEOS Inovyn; Runcorn; On-site; GBP 70,000 - 95,000; Full time

Job summary

INEOS Inovyn in the United Kingdom seeks a Senior M365 Developer to lead design, development and evolution of Microsoft 365 solutions across SharePoint, Power Apps, Power Automate and Power BI. You will own end-to-end delivery, ensuring secure, scalable and maintainable platforms aligned with strategy.

You will guide modernization, support CI/CD practices, and mentor junior developers while collaborating with distributed teams in an Agile environment.

Qualifications

• Strong experience designing and developing solutions within Microsoft 365 (SharePoint, Power Apps, Power Automate, Power BI).
• Ability to translate business requirements into scalable technical solutions and architectures.
• Experience integrating systems using APIs, including Microsoft Graph API and external services.
• Proficiency in modern development languages: JavaScript, TypeScript, HTML, CSS, and C#.
• Experience with development and integration tools: Visual Studio, VS Code, Graph Explorer, Postman.
• Good working knowledge of Azure services (Entra ID, App Services, Function Apps).
• Understanding of governance, security, and compliance within M365 ecosystem.
• Experience working in distributed teams using Agile methodologies.
• Strong stakeholder engagement and the ability to operate across technical and business audiences.
• Professionalism, ownership, and accountability.

Responsibilities

• Partner with business stakeholders to understand processes, challenges, and opportunities.
• Lead design and development of scalable M365 solutions across SharePoint, Power Apps, Power Automate, and Power BI.
• Own end-to-end solution delivery: architecture, build, testing, deployment, user adoption.
• Drive best practices in governance, security, and lifecycle management across M365.
• Act as technical lead for M365 initiatives, including SIT, UAT, and go-live activities.
• Maintain and optimise existing solutions for performance and reliability.
• Contribute to M365/Power Platform strategy, driving efficiency and standardisation.
• Support adoption of modern development practices (CI/CD, DevOps, reusable components).
• Provide guidance and mentoring to junior developers and collaborate across distributed teams.

Skills

M365 Design

SharePoint

Power Apps

Power Automate

Power BI

JavaScript/TypeScript

C#

Azure

Agile

Stakeholder engagement

Tools

Visual Studio

VS Code

Microsoft Graph Explorer

Postman

Job description

Role Overview

The Senior M365 Developer is responsible for leading the design, development, and evolution of Microsoft 365 based solutions that enable digitalisation, automation, and data‑driven decision making across the organisation. This role combines hands‑on technical delivery with platform ownership, working closely with stakeholders to translate business needs into scalable, secure, and maintainable solutions aligned with the overall M365 and Power Platform strategy.

Key Responsibilities

• Partner with business stakeholders to understand processes, challenges, and opportunities, shaping effective M365‑based solutions.
• Lead the design and development of scalable solutions across the M365 stack, including SharePoint, Power Apps, Power Automate, and Power BI.
• Own end‑to‑end solution delivery, including architecture, design, build, testing, deployment, and user adoption.
• Drive best practices in solution design, governance, security, and lifecycle management across the M365 platform.
• Act as a technical lead for M365 initiatives, including oversight of SIT, UAT, and go‑live activities to ensure high‑quality delivery.
• Maintain and optimise existing solutions, ensuring performance, reliability, and alignment with evolving business needs.
• Contribute to the definition and evolution of the M365 / Power Platform strategy, identifying opportunities to improve efficiency and standardisation.
• Support the adoption of modern development practices (e.g. CI/CD, DevOps, reusable components) within the platform.
• Provide guidance and mentoring to junior developers and support collaboration across a distributed team.

Skills And Experience

• Strong experience designing and developing solutions within Microsoft 365, including SharePoint, Power Apps, Power Automate, and Power BI.
• Proven ability to translate business requirements into scalable technical solutions and architectures.
• Experience integrating systems using APIs, including Microsoft Graph API and external services.
• Proficiency in modern development languages including JavaScript, TypeScript, HTML, CSS, and C#.
• Experience with development and integration tools such as Visual Studio, Visual Studio Code, Microsoft Graph Explorer, and Postman.
• Good working knowledge of Azure services, including Entra ID, App Services, and Function Apps.
• Understanding of governance, security, and compliance considerations within the M365 ecosystem.
• Experience working within distributed teams using modern delivery methodologies (e.g. Agile).
• Strong stakeholder engagement and communication skills, with the ability to operate across technical and business audiences.
• Demonstrates high levels of professionalism, ownership, and accountability.

Job Details

• Location: Runcorn, United Kingdom
• Discipline: Other
• Type: Full-time
• Business: INEOS Inovyn
• Posted: 06 July 2026
• Closing Date: 31 August 2026
• Requisition ID: 3949