Senior Backend Engineer - Core Alarm System

Company: Sector Alarm
Location: Fuengirola, Malaga, Spain
Type: Hybrid
Posted: Sep 30, 2026
Views: 2

Location Tech Hubs: Oslo, Norway or Fuengirola, Malaga, Spain

Reports: Engineering Manager

Role Overview
The new talent will play a critical role in designing and developing backend systems that support IoT devices, leveraging modern DevOps practices. Works with cutting-edge technologies in Azure cloud infrastructure and a microservices architecture, building solutions that protect the lives and homes of our customers.

Team Overview

The team is responsible for the end-to-end mobile experience that allows customers to configure, monitor, and control their alarm system. Their mission is to provide a seamless, secure, and intuitive experience for managing both security and smart home capabilities directly from the app.
Key user journeys include:

  • Arming and disarming the alarm system, including automation scenarios.
  • Managing smart door locks, including locking, unlocking, pairing, and removing devices such as Yale Doorman and Danalock.
  • Enabling and disabling smart plugs, as well as configuring related automation flows.
  • Managing core system settings, including room names, areas, and overall system organization.
The team owns the customer-facing experience across these journeys, ensuring reliability, ease of use, and a connected smart home ecosystem

Main Responsibilities

  • Strengthen and support the development team, building software that helps to protect the lives and homes of our customers.
  • Write clean, scalable code using C# .NET Core.
  • Write code and develop according to business and user needs.
  • Evaluate new code for reliable architecture, stability, reusability, performance, automation, security and metrics.
  • Remain up to date with the terminology, concepts, and best practices for coding.
  • Write unit and integration tests to cover functionality and reduce regressions.
  • Mentor junior developers and new team members
  • Coordinate with product owners, developers and architects.
  • Solve complex development problems and technical challenges through innovative approaches and problem solving.
Education  
  •  Bachelor’s or Master’s degree in relevant field (Computer Sciences, Information, Computer Engineering)
Requirements  
  • 7+ yrs of experience as a hands on Backend Developer
  • Strong proficiency in C# and .NET Core knowledge
  • 5+ yrs of experience with microservices and APIs (REST and event-based architectures).
  • Experience with Claude Code for AI Assisted development and code generation
  • Experience writing backend services consumed by IOS and Android apps
  • SQL and Azure Service Bus Knowledge Ability in automation and integration testing.
  • Excellent verbal and written English skills
  • A valid work permit in the EU.

Nice-to-have

  • Knowledge of Azure ecosystem
  • DevOps and Terraform experience
  • Expertise with CI/CD and test automation

    About the recruitment process


    We will recruit on a rolling basis, so please do not hesitate to apply with a CV in English.

    Note 1: We are flexible hybrid and we expect you visit our Fuengirola office unless once a week
    Note 2: The Reference and background check will be requested for the successful candidate.

About the Company

Name: Sector Alarm
Location: Europe

Sector Alarm is one of Europe’s leading safety providers with over 30 years’ experience, protecting more than 730,000 homes and businesses across Europe. They offer all-inclusive home security with 24/7 monitoring and instant response, state-of-the-art technology, and exceptional customer service (rated 4.8/5 on Trustpilot). They won the iF Design Award 2023 for Product User Experience. Their mobile app allows users to arm/disarm alarms, receive real-time alerts, view live video, talk/listen, manage smart plugs and door locks, and more.

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