Senior Backend Developer

The Portfolio Group; Manchester; On-site; GBP 50,000 - 70,000; Full time

Job summary

A leading tech company is on the lookout for a Senior Backend Developer to join their new engineering team. This role offers the chance to shape systems that impact lives across the UK and Ireland while working on cutting-edge technologies such as C#, .NET, and Azure. Mentorship and continuous improvement will be integral to your work, fostering both your career and the team's success.

Qualifications

• 5+ years of backend development experience required.
• Expertise in C#, .NET (preferably .NET 6+), and SQL Server.
• Experience with Azure services, including serverless architecture.

Responsibilities

• Enhance core product features and functionality.
• Design and implement scalable backend systems using C#.
• Collaborate with stakeholders to define solutions.

Skills

C#

.NET

Azure

SQL Server

Git

Unit Testing

API Development

Problem-solving

Communication

Mentoring

Tools

Docker

Kubernetes

Job description

We're looking for a talented Senior Backend Developer to join a purpose-driven tech team that creates solutions making a real difference in people's lives. This is more than just a job-it's a chance to shape systems that support individuals and organisations across the UK and Ireland.

The Role

As a Senior Backend Developer, you'll be a founding member of a newly formed cross-functional engineering team. You'll play a key role in setting the tone for the team's culture, practices, and success. Your technical expertise will shape our architecture and support business-critical applications.

This is a highly collaborative role suited to someone with a passion for software craftsmanship, mentoring, and continuous improvement.

Key Responsibilities

• Enhance features and functionality of core products
• Design and implement scalable backend systems using C# (.NET 6+ preferred)
• Build cloud-native solutions using Azure, including Azure Functions (serverless)
• Work with schema-less databases such as Cosmos DB
• Write clean, maintainable, and testable code using TDD/BDD principles
• Create and maintain RESTful and GraphQL APIs
• Collaborate with Product Owners, Business Analysts, and stakeholders to define solutions
• Mentor junior developers and promote engineering best practices
• Drive improvements in development processes, CI/CD pipelines, and tooling
• Investigate and resolve production issues
• Ensure observability through logging, metrics, and diagnostics
• Contribute to event-driven architecture and distributed systems design

What You Bring

• 5+ years of backend development experience
• Expertise in C#, .NET (preferably .NET 6+), and SQL Server
• Experience with Azure services, including Azure Functions and serverless architecture
• Knowledge of schema-less databases such as Cosmos DB or similar
• Solid understanding of SOLID principles, OOP, and event-driven architecture
• Proficiency in Git, Unit Testing frameworks (e.g., NUnit), and API development
• Familiarity with CI/CD pipelines and agile methodologies
• Strong communication, problem-solving, and mentoring skills
• A mindset of continuous learning and a drive to grow within a dynamic, evolving team

Bonus Points

• Experience in payroll systems
• Background in fintech or financial services
• Exposure to containerisation technologies such as Docker or Kubernetes

Why Join?

This is an incredible opportunity to make your mark in a company that prioritises purpose, innovation, and professional growth. You'll be part of a team where your ideas are welcomed, your development is encouraged, and your work truly matters.

Ready to build something that helps others and builds your career in the process? Apply today.

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