Senior Developer

Investigo; Sunderland; Hybrid; GBP 55,000 - 75,000; Full time

Job summary

Investigo Sunderland is seeking a Senior Software Developer to join a growing technology team. The role is based in Sunderland with a hybrid pattern (3 days on site). You will work across the full lifecycle, delivering new solutions, optimising existing platforms and supporting business-critical applications.

The successful candidate will demonstrate strong skills in C#, .NET, SQL Server, Visual Studio and API integrations, with an analytical mindset and collaborative approach to stakeholders.

Qualifications

• Experience with C#, .NET, Visual Studio and Microsoft development technologies across web and Windows platforms.
• Strong SQL Server design, queries, stored procedures, reporting, and performance tuning.
• Translate requirements into technical solutions and contribute to system design.
• Build and maintain API integrations and connected services.
• Deliver custom development from requirements through testing, deployment and support.
• Investigate and resolve complex issues to ensure reliability, security and performance.
• Maintain data integrity, documentation and development best practices.
• Experience with PowerShell, Power Platform and Power Apps would be an advantage.

Responsibilities

• Design, develop and maintain business applications across web and Windows platforms.
• Develop and optimise SQL Server solutions including design, queries and reporting.
• Convert business requirements into technical designs and architectures.
• Create and maintain API integrations and connected services.
• Deliver projects from requirements to deployment and ongoing support.
• Investigate complex issues to ensure reliability, security and performance.

Skills

C#

.NET

Visual Studio

APIs

PowerShell

Power Platform

Power Apps

Tools

SQL Server

Job description

Senior Software Developer (Microsoft Stack)

Location: Sunderland (3 days a week)

Contract: Permanent

A Software Developer is required to join a growing technology team, responsible for the development, support, and continuous improvement of internal business systems. This role will work across the full software development lifecycle, delivering new solutions, enhancing existing platforms, and supporting business-critical applications across the organisation.

Key Responsibilities & Skills:

• Design, develop, and maintain applications using C#, .NET, Visual Studio, and Microsoft development technologies across web and Windows-based platforms.
• Develop and optimise SQL Server solutions, including database design, queries, stored procedures, reporting, and performance improvements.
• Translate business requirements into technical solutions, contributing to system design, architecture, and successful delivery.
• Build and maintain integrations using APIs and connected services.
• Deliver custom development projects from initial requirements through to testing, deployment, and ongoing support.
• Investigate and resolve complex software issues to ensure application reliability, security, and performance.
• Maintain strong standards around data integrity, documentation, and development best practices.
• Support continuous improvement across systems, processes, and development practices.
• Experience with PowerShell, Microsoft Power Platform, and Power Apps would be an advantage.

The organisation is looking for a commercially experienced developer with strong skills across the Microsoft technology stack, including C#, .NET, SQL Server, Visual Studio, APIs, and Business Central. The successful candidate will have a strong analytical mindset, excellent problem-solving skills, and the ability to work collaboratively with both technical teams and business stakeholders.

If you're looking to join a collaborative development team and work on a range of business-critical systems within a Microsoft-focused environment, we'd love to hear from you.