Senior Backend Engineer — B2B SaaS, Remote

ISR RECRUITMENT LIMITED; United Kingdom; Remote; GBP 60,000 - 75,000; Full time

Benefits offered by this job

Remote working

Job summary

ISR Recruitment Limited is seeking a Senior Backend Engineer to help shape a next-generation B2B SaaS platform and join the Product & Engineering team. You will design and build backend services in C#/.NET, drive RESTful APIs, and mentor peers while ensuring security, scalability and multi-tenant resilience across cloud environments.

The role focuses on delivering production-ready software with a strong emphasis on maintainability and performance within an Azure-based stack, in a modern,

Qualifications

• 8+ years of commercial software engineering with backend focus.
• Proven B2B SaaS and multi-tenant experience.
• Strong C# and .NET experience on Azure stack.

Responsibilities

• Design and maintain backend services and APIs.
• Build scalable, secure multi-tenant SaaS platform.
• Mentor engineers and raise engineering standards across the team.
• Collaborate in an Agile Product & Engineering environment.

Skills

Backend development

B2B SaaS experience

Multi-tenant SaaS experience

Mentoring

Agile teamwork

Tools

C# / .NET

SQL

Azure

Docker

Kubernetes

Azure Service Bus

OpenTelemetry

Job description

ISR Recruitment Limited is seeking a Senior Backend Engineer to help shape a next-generation B2B SaaS platform and join the Product & Engineering team. You will design and build backend services in C#/.NET, drive RESTful APIs, and mentor peers while ensuring security, scalability and multi-tenant resilience across cloud environments.

The role focuses on delivering production-ready software with a strong emphasis on maintainability and performance within an Azure-based stack, in a modern,