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# Principal Back-End Engineer

- **Company:** Kinetech
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £90,000.0 - £110,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Microsoft Azure, C Sharp (Programming Language), Cloud Engineering, Software Quality, Continuous Integration, Python (Programming Language), SQL Databases, Systems Integration, Backend, Event Driven Architecture, Terraform
- **Published:** September 3, 2026
- **Apply:** https://www.totaljobs.com/job/principal-back-end-engineer/kinetech-recruitment-job107933714

## About the Role

You'll already be operating at Senior, Lead or Principal Engineer level and will have deep hands-on expertise in C# .NET or Python (ideally both!).

We're particularly interested in engineers who:

 * Are comfortable working beyond their primary language and across a mixed technology environment.
 * Have strong backend experience across APIs, integrations and event-driven architectures.
 * Have integrated enterprise platforms, internally developed systems and third-party applications.
 * Understand SQL, data modelling, cloud engineering and modern CI/CD practices.
 * Can take a technical problem from investigation and architecture through to hands-on delivery.
 * Make pragmatic technical decisions with scalability and maintainability in mind.
 * Communicate well with engineers and non-technical stakeholders alike.
 * Have already embedded AI into their engineering workflow and can demonstrate a thoughtful, responsible approach to its use.

Experience with IaC, Terraform, broader full-stack technologies or platform/service-based environments would be useful but isn't essential.

## Description

You'll join a business with a complex technology landscape and a significant programme underway to improve how its core applications and services communicate. The environment spans C# .NET, Python and Azure, and you'll have considerable freedom to assess what's there, challenge existing thinking and help shape the right technical approach., * Remaining hands-on with the code while providing technical direction across backend engineering.

 * Owning and evolving the architecture connecting core platforms, internal applications and external services.
 * Designing and delivering APIs, integrations, messaging and event-driven solutions.
 * Reviewing existing architecture and proposed designs, making pragmatic recommendations and leading them through to delivery.
 * Working across C# .NET, Python and Azure, including cloud-based integration technologies.
 * Supporting other engineers and helping improve technical standards, testing, code quality and development practices.
 * Using AI-augmented development practices to improve engineering quality, speed and delivery, with appropriate controls and validation.
 * Working closely with technical and business stakeholders to turn complex requirements into effective solutions.