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# Senior Backend Developer

- **Company:** Waracle
- **Location:** London, UK (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** .NET Framework, Amazon Web Services, Application Performance Management, Microsoft Azure, C Sharp (Programming Language), Databases, Continuous Integration, DevOps, Memory Management, Performance Tuning, Query Optimization, Strategies of Testing, .NET Core, Software Security, Caching, Backend
- **Published:** September 10, 2026
- **Apply:** https://www.collegerecruiter.com/job/2840591152-senior-backend-developer

## About the Role

We appreciate diverse backgrounds and career paths. If you don't meet every single qualification below but are excited about the role and confident in your ability to learn, we still encourage you to apply!

 * Core Backend Expertise: Proven proficiency in C# and the .NET framework (or .NET Core) in a commercial environment.
 * System Design: Extensive experience designing, building, and maintaining scalable and resilient backend systems.
 * CI/CD and DevOps: Experience leveraging CI/CD and DevOps tools to support and automate processes, complemented by familiarity with modern cloud platforms (e.g., AWS, Azure).
 * Senior Capacity: Demonstrable experience in a senior capacity, including leading workstreams and driving technical direction.
 * Database & Performance: Demonstrable experience with database technologies and optimising application performance (e.g., query tuning, caching).
 * Communication & Leadership: The ability to confidently present demos to clients and stakeholders, and explain technical trade-offs in plain language.
 * Collaboration: Excellent organisational, presentation, and communication skills, with the ability to engage with and connect to a wide variety of personality types.

## Description

* Feature Design & Delivery: Design and deliver end-to-end backend features and subsystems, ensuring code is modular, reusable, and scalable across projects.
 * DevOps & Automation: Own and execute DevOps/CI/CD tasks, including setting up and maintaining pipelines and automation to streamline build, test, and deployment.
 * Performance Optimisation: Optimise service performance, scalability, and resilience through application-level improvements (e.g., query tuning, caching, threading, memory management).
 * Security & Testing Strategy: Deliver and maintain robust application security and guide the testing strategy (unit, integration, service-level) to ensure release readiness and service accuracy.
 * Technical Leadership & Risk Management: Lead feature delivery, independently resolve day-to-day issues, and shape tactical direction by identifying and mitigating risks while evaluating trade-offs (speed vs. quality).
 * Cross-Client Context Switching: Comfortably manage work across multiple clients, adapting quickly to different application landscapes and priorities.
 * Mentoring & Community Contribution: Mentor junior colleagues, conduct peer reviews, and contribute to the wider practice by introducing new industry ideas and owning internal Community of Practice (CoP) initiatives.


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