Senior Software Engineer -.NET & React

WHAT YOU’LL DO

We are looking for talented Senior Software Engineers with strong experience in .NET Core, Azure cloud services, and React.js to build modern, scalable, and high-performance enterprise applications. You will work on cloud-native solutions, microservices, and full-stack development, while driving secure DevOps practices, Infrastructure as Code (IaC), and intelligent automation.

As a Senior Software Engineer, you will be responsible for designing, developing, and maintaining high-quality software solutions that meet the needs of our organization and clients. You will collaborate with cross-functional teams to analyze requirements, develop efficient code, perform rigorous testing, and deliver robust software products. The ideal candidate has a strong background in software development, a passion for technology, and a drive for continuous learning and improvement.

At H&M, one of our core principles is "We are One Team." You will be part of a global team working alongside colleagues in Sweden.

WHO YOU’LL WORK WITH

You’ll be joining the Quality & Compliance Team within CoE Engineering — a dynamic, global group that serves as the backbone of H&M’s product quality and compliance.

As part of this team, you’ll collaborate with passionate engineers and specialists who ensure our products meet the highest standards of safety, quality, and integrity. Together, we build and maintain tools that enable accurate data, timely decisions, and seamless compliance processes across H&M’s global operations.

We’re a team that moves fast, solves real-world challenges, and takes pride in safeguarding H&M’s brand and customers. If you thrive in a collaborative, high-impact environment where precision and purpose go hand in hand, we’d love to have you with us.

Responsibilities

• Design, develop, and maintain scalable full-stack applications using .NET Core and React.js.
• Build secure and high-performance microservices deployed on Azure Kubernetes Service (AKS).
• Develop and optimize RESTful APIs and cloud-native components, ensuring fault tolerance and resilience.
• Implement modern CI/CD pipelines and IaC using Azure DevOps, Terraform, or Bicep.
• Apply secure coding practices, integrating authentication/authorization (OAuth 2.0, OpenID Connect, JWT).
• Tune system performance, manage memory, and handle production-grade scalability challenges.
• Integrate logging and monitoring tools (e.g., Serilog, Application Insights, Grafana, ELK) for proactive issue resolution.
• Work collaboratively with cross-functional teamsproduct, DevOps, QA, and architects to deliver business outcomes.
• Contribute to software engineering best practices: code reviews, test automation, branching strategies, and documentation.
• Adopt AI-assisted development tools and apply intelligent automation to improve
  productivity and code quality

WHO YOU ARE
We are looking for people with

• 6-10 years of professional experience using .NET technologies. Strong proficiency in C#, ASP.NET, and .NET Core.
• Ideal for seasoned developers who can lead architecture, performance engineering, and DevOps implementation.
• Deep expertise in .NET Core internals, performance tuning, and memory optimization.
• Proven experience designing microservices architectures on Azure.
• Strong frontend engineering with React.js, Webpack, and modern JS tooling.
• Experience with Kubernetes, Docker, Terraform/Bicep, and GitOps pipelines.
• Strong knowledge of cloud security, OAuth 2.0, and encryption strategies.
• Expertise in distributed systems, caching strategies (Redis), and API gateways (e.g., Azure API Management).
• Advanced skills in stream/event-driven architectures (Kafka, Azure Event Hubs).
• Strong SQL & NoSQL expertise (e.g., MongoDB, Cosmos DB) with scalable DB design.
• Ability to lead AI-assisted development and adopt GenAI copilots and automation tools.
• Strong troubleshooting and incident management in production environments.

Preferred:

• Knowledge of API governance, versioning strategies, and service mesh.
• Experience mentoring team members, leading code reviews, and driving Agile practices.

And people who are…

• Excited about working in a fast-paced, Agile environment.
• Open to learning and adapting to new technologies and best practices.
• Team players with strong collaboration and communication skills.

WHO WE ARE

H&M is a global company of strong fashion brands and ventures. Our goal is to prove that there is no compromise between exceptional design, affordable prices, and sustainable solutions. We want to liberate fashion for the many, and our customers are at the heart of every decision we make.

We are made up of thousands of passionate and talented colleagues united by our shared culture and values. Together, we want to use our power, our scale, and our knowledge to push the fashion industry towards a more inclusive and sustainable future.

Help us re-imagine fashion and together we will re-shape our industry. Learn more about H&M here.

WHY YOU’LL LOVE WORKING HERE

At H&M, we are proud to be a vibrant and welcoming company. We offer our employees attractive benefits with extensive development opportunities around the globe.

We offer all our employees at H&M attractive benefits with extensive development opportunities around the globe. All our employees receive a staff discount card, usable on all our H&M brands in stores and online. Brands covered by the discount are H&M (Beauty and Move included), COS, Weekday, Monki, H&M HOME, & Other Stories, ARKET, Afound. In addition to our staff discount, all our employees are included in our H&M Incentive Program – HIP. You can read more about our H&M Incentive Program here.
In addition to our global benefits, all our local markets offer different competitive perks and benefits. Please note that they may differ between employment types and countries.

JOIN US

Our uniqueness comes from a combination of many things – our inclusive and collaborative culture, our strong values, and opportunities for growth. But most of all, it’s our people who make us who we are.

Take the next step in your career together with us. The journey starts here.

*We are committed to a recruitment process that is fair, equitable, and based on competency. We therefore kindly ask you to not attach a cover letter in your application

This is a full-time position, starting in Janaury 2026.
Apply by sending in your CV in English as soon as possible, but no later than the 17th of Nov 2025.
Due to data policies, we only accept applications through the SmartRecruiters or career page.