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atNorth

atNorth hefur frá 2009 verið brautryðjandi í hönnun, uppbyggingu og rekstri hátæknigagnavera á Íslandi, Svíþjóð, Finnlandi og Danmörku. Meðal viðskiptavina atNorth eru alþjóðleg fyrirtæki og stofnanir sem starfa í fjölmörgum greinum, svo sem við rannsóknir, í heilbrigðisgeiranum, í fjármálaiðnaði og veðurfræði, sem nýta þjónustu atNorth til þess að vinna gögn með hámarks afköstum á hagkvæman og umhverfisvænan hátt. Með staðsetningu gagnavera atNorth á Norðurlöndunum getur fyrirtækið nýtt umhverfisaðstæður svo sem loftslag og nýtingu hita sem myndast í gagnaverunum til að ná fram betri orkunýtingu en þekkist annars staðar við rekstur gagnavera, ásamt því að knýja gagnaverin með endurnýjanlegri orku. Hringrásarhagkerfið sem byggir á grunni endurnýjanlegrar orku og hagkvæmrar orkunýtingar er haft að leiðarljósi við hönnun gagnavera atNorth. Höfuðstöðvar atNorth eru í Reykjavík, en fyrirtækið rekur sjö gagnaver á Norðurlöndum. Á árinu 2024 verða tvö ný gagnver tekin í notkun í Finnlandi og Danmörku. Frekari upplýsingar um atNorth er að finna á heimasíðu fyrirtækisins atnorth.com og eins má fylgja atNorth á Linkedin og Facebook. _______________________________ atNorth is a leading Nordic data center company providing sustainable, high-performance computing and colocation solutions across Iceland, Sweden, Finland and Denmark. We design mission-critical ecosystems powered by 100% renewable energy and circular economy principles, staying ahead through a relentless focus on reliability, security, and performance. We believe world-class technology requires a world-class culture. Our people-first mentality ensures that technical excellence and human wellbeing go hand in hand. Built on collaboration, ownership, and trust, our environment empowers individuals to take responsibility, grow their expertise, and make a real impact. By joining our international team, you play a direct role in shaping the future of sustainable digital infrastructure while supporting the communities and industries we serve. About the atNorth Culture We believe that sustainable success starts with the wellbeing of our people. For us, an open, transparent, and inclusive culture is more than a priority, it is the core of how we lead and innovate. We don’t just talk about culture; we nurture it. Through regular one-to-one engagements and monthly wellbeing surveys, we listen carefully to our teams, ensuring that every voice is heard and every opportunity for improvement is embraced. We recognize that innovation and collaboration thrive where people feel truly connected, which is why we come together each week to share ideas, strengthen relationships, and nurture a sense of belonging, sometimes over a simple breakfast and good conversation. At atNorth, we are building a community where you can do your best work and shape a sustainable future together.

Vinnustaðurinn

Senior Back-End Developer

We’re looking for an experienced Senior Back‑End Developer with strong .NET skills to help us build secure, scalable, and high‑performance backend services. In this role, you will design and develop RESTful APIs, build reliable integrations, and contribute to the backend architecture powering our products.

You’ll work closely with product owners, architects, frontend developers, and DevOps to deliver clean, well‑tested, and well‑documented services. You’ll also support integrations with internal and external systems, including messaging via Azure Service Bus and data workflows with Microsoft Fabric.

This is a great opportunity for someone who enjoys solving complex engineering challenges and shaping modern backend platforms.

This role will be based in atNorth's ICE01 Datacenter in Reykjavik, Hafnarfjörður.

Key responsibilities:

API & backend engineering

Design, develop, and maintain secure, high‑performance RESTful APIs using .NET
Ensure scalability, reliability, and maintainability through clean code and strong architecture
Build and maintain integrations with internal systems and third‑party services
Participate in code reviews, technical discussions, and continuous improvement

Quality, testing & CI/CD

Apply TDD principles and write high‑quality unit and integration tests
Use tools such as xUnit or NUnit to ensure reliable test coverage
Work with DevOps to integrate testing into CI/CD pipelines
Perform performance, load, and stress testing to validate system behavior

Documentation & developer experience

Produce clear, accurate API documentation using OpenAPI/Swagger
Maintain Postman collections and other developer‑friendly tools
Ensure documentation is version‑controlled and kept up to date
Provide examples, guidelines, and error‑handling documentation

Integrations, data & operations

Build integrations using Azure Service Bus and event‑driven workflows
Work with Microsoft Fabric for reporting, analytics, and data retrieval
Collaborate with data and analytics teams to meet downstream requirements
Monitor production systems, troubleshoot issues, and support incident resolution

Your profile:

Backend & API development

Solid experience developing backend services and RESTful APIs with .NET
Strong understanding of API design principles (authentication, versioning, error handling, etc.)
Experience using OpenAPI/Swagger and Postman

Testing & quality engineering

Hands‑on experience with TDD and writing unit/integration tests
Experience integrating automated tests into CI/CD pipelines
Familiarity with performance and load testing

Cloud, security & architecture

Understanding of secure coding practices and common API security standards
Experience with event‑driven or message‑based architectures (e.g., Azure Service Bus)

Engineering practices & collaboration