Senior Backend Engineer - Core Alarm System

Sector Alarm; Oslo; Hybrid; NOK 900,000 - 1,200,000; Full time

Benefits offered by this job

Hybrid work

Weekly Fuengirola office visit

Job summary

Sector Alarm is seeking an experienced Backend Developer to design and implement robust backend services for our IoT and smart home platform. You will work on microservices in Azure, with REST and event-based architectures, ensuring secure, scalable systems across iOS and Android integrations.

You will mentor peers, write tests, and collaborate with product owners and architects in a hybrid environment with occasional travel to Fuengirola. Fluency in English and EU work eligibility are required.

Qualifications

• 7+ years of hands-on backend development experience.
• Strong C# and .NET Core proficiency.
• 5+ years building microservices and REST/event-based APIs.
• Experience with Claude Code for AI-assisted development.
• Backend services consumed by iOS and Android apps.
• SQL and Azure Service Bus knowledge; test automation.
• Excellent English communication; EU work permit.

Responsibilities

• Strengthen and support the development team to protect customers.
• Write clean, scalable C# .NET Core code.
• Develop according to business and user needs.
• Evaluate code for architecture, stability, and security.
• Write unit and integration tests to prevent regressions.
• Mentor junior developers and coordinate with stakeholders.

Skills

C#

NET Core

Microservices

Azure

REST APIs

SQL

English

Education

Bachelor’s or Master’s degree in Computer Science

Tools

Claude Code

Azure Service Bus

Job description

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.

Sector Alarm is one of Europe’s leading safety providers with more than 730,000 satisfied and safe customers. We have been in operation for over 30 years and deliver superior alarm solutions to homeowners and businesses across Europe. Providing excellent customer service is extremely important to us and we are proud of our consistent 95% customer satisfaction rating.

Sector Alarm has experienced strong growth over the years and is continuing to expand in both new and existing markets. Today, we are over 4,200 employees operating in Norway, Sweden, Finland, Ireland, Spain, France, Italy and Portugal. Our focus on hiring the right people has enabled us to offer customers state-of-the-art security solutions and gain strong market positions in the countries where we operate.

We offer exciting career opportunities in a company with an ambitious growth strategy and fantastic colleagues. If you share our passion for providing innovative solutions that offer safety and peace of mind, are 100% goal focused and are looking for a fun, fast paced work environment - we would love to hear from you.