Principal Software Engineer

Reed Technology; Cramlington; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A leading technology firm in the United Kingdom is seeking a Principal Software Engineer to lead the migration and modernisation of complex legacy applications into a modern, scalable architecture. This hands-on role involves driving the migration of legacy systems, defining microservice architectures, and collaborating with a cross-functional team. The ideal candidate will have expertise in C#, .NET, SQL, and React, excelling in leadership and communication. This role offers excellent benefits and hybrid working options.

Benefits

Excellent benefits package

Attractive pension scheme

Hybrid working with flexibility

Qualifications

• Proven experience in application modernisation and migration projects.
• Hands-on expertise in C#, .NET, SQL, and Web APIs.
• Cloud experience (Azure preferred, AWS considered).
• Knowledge of front-end technologies (React essential).

Responsibilities

• Drive the migration of legacy systems to modern, cloud-based solutions.
• Define and implement microservice architecture using a code-first approach.
• Collaborate with a cross-functional team to ensure seamless integration.

Skills

Application modernisation

Microservice architecture

C#

ASP.NET

SQL

Web APIs

React

Leadership

Communication

Job description

About the Role

We're looking for a Principal Software Engineer to lead the migration and modernisation of a complex legacy application into a modern, scalable architecture. This is a hands-on technical leadership role where you'll shape the design, guide the team, and ensure successful delivery of a critical transformation project.

Responsibilities

• Drive the migration of legacy systems to modern, cloud-based solutions.
• Define and implement microservice architecture using a code-first approach.
• Apply strong architectural principles and design patterns to deliver robust solutions.
• Collaborate with a cross-functional team (including React developers) to ensure seamless integration of front-end and back-end.
• Get hands-on with C#, .NET, SQL, Web APIs, and React for complex feature development.
• Build credibility through technical expertise and lead the team in pushing designs forward.
• Work on features that require deep integration with multiple third-party applications.

Qualifications

• Proven experience in application modernisation and migration projects.
• Strong background in microservice architecture and design patterns.
• Hands-on expertise in C#, .NET, SQL, and Web APIs.
• Cloud experience (Azure preferred, AWS considered).
• Knowledge of front-end technologies (React essential; exposure to Next.js a plus).
• Ability to understand and guide front-end work within the overall architecture.
• Evidence of delivering complex technical solutions and influencing design decisions.
• Excellent communication and leadership skills to inspire and guide a team.

Interview Process

• Introductory Call with the Hiring Manager - review CV, discuss role, answer questions.
• Take-home Technical Task.
• Face-to-Face Interview at the Newcastle office.

Why Join Us?

• Excellent benefits package including an attractive pension scheme
• Be at the forefront of a major transformation project.
• Work with modern technologies and cloud platforms.
• Hybrid working with flexibility.
• Opportunity to influence architecture and technical direction.

Interested? Apply now and help us modernise for the future