Senior Software Engineer (f/m/d)

Axpo Group; Madrid; Hybrid; EUR 80,000 - 110,000; Full time

Benefits offered by this job

Flexible hours

Meal allowances

Internet stipend

Training courses

Gym coverage

Health insurance

Job summary

Axpo Group is seeking a Senior Software Engineer to lead development, operation, and optimization of credit and market risk platforms. You will design scalable backend services, APIs, and cloud infrastructure, primarily using .NET C# and/or Python on Azure with Kubernetes and Terraform.

We value strong technical leadership, mentoring, and collaboration with risk teams and mathematicians to translate complex specifications into practical models.

Qualifications

• 10+ years in backend development and API design.
• Strong skills with .NET C# and/or Python.
• Experience with Azure, Docker, and Kubernetes.
• Knowledge of DevOps, infrastructure as code, and CI/CD.
• Energy trading or risk project background is a plus.
• Security and authentication in distributed systems is important.

Responsibilities

• Define architectural decisions to ensure scalability and robustness.
• Lead design of pricing and risk management tools using .NET or Python.
• Lead backend services and APIs using .NET C# and/or Python.
• Oversee Azure cloud infrastructure with Kubernetes, Helm, Service Mesh.
• Develop infrastructure as code with Terraform and secure access control.
• Collaborate with Product Owner and Risk teams to translate specs into models.

Skills

Backend development

API design

Cloud technologies

C# / Python

Azure

Docker

Kubernetes

DevOps / IaC / CI-CD

Security practices

Mentoring teams

Tools

Terraform

Job description

We are looking for a Senior Software Engineer to take a leading role in developing, operating, and optimizing our Credit and Market Risk models and platforms. These business-critical platforms support the development, testing, configuration, orchestration, and management of models.

You’ll bring strong backend and API/service design skills, experience with cloud technologies, and ideally knowledge of energy trading and risk. You’ll work closely with the Product Owner, Risk department, and a cross-functional team of mathematicians and software engineers to shape the platform’s architecture and technical direction. The team is supported by an operations team that provides first-line support.

What you will do:

• Define and drive architectural decisions, ensuring scalability, robustness, and efficiency

• Lead the design and development of pricing and risk management tools using .NET, Python, or R

• Lead the design and implementation of backend services and APIs using .NET C# and/or Python

• Oversee cloud infrastructure on Azure, including secure deployments with Kubernetes, Helm, and Service Mesh

• Develop and manage infrastructure as code using Terraform, and maintain authentication and security measures

• Partner with the Product Owner, the Risk department, and cross-functional teams to translate specifications into practical models

What you bring & who you are:

• Substantial experience (10+ years) in backend development, API/service design, and cloud technologies

• Proficiency in .NET C# and/or Python, with a good grasp of algorithm efficiency

• Experience with Azure, Docker, and Kubernetes, and a solid understanding of DevOps practices such as infrastructure as code and CI/CD

• Ideally, previous experience in energy trading and risk projects

• Strong understanding of authentication, authorization, and security best practices in distributed systems; familiarity with database management systems and monitoring tools such as Grafana is a plus

• Experience guiding and mentoring technical teams, with a collaborative, ownership-driven mindset – even if you don't tick every box, we look forward to your application

• Experience in trading systems or portfolio risk management tools is considered as a plus

About the team:

You’ll join a team of highly skilled mathematicians and software engineers responsible for business-critical models, supported by an operations team. The team values close collaboration, mutual support, and diverse perspectives in shaping the platform’s technical direction.

Benefits:

At our company, we strive to create a culture of continuous learning, personal growth, and inter- national community involvement. We're passionate about providing our employees with the tools and resources they need to succeed, and we're confident that you'll love being part of our team!

• Working Hours
  We offer flexible working hours to accommodate your work schedule. We can work part of our time remotely and the rest at our offices in Madrid, Torre Europa.

• Meal allowances

  You can enjoy delicious meals on us, no matter if you are working remotely or on-site.
  *Option to use it for public transportation or childcare instead.

• Internet Compensation
  We cover the cost of your home internet connection, as we understand how essential connectivity is in the modern workplace.

• Training courses
  Our company is committed to helping our employees grow and develop their skills, which is why we offer a variety of industry- specific training courses and a learning channel.

• Gym Coverage
  Stay active and healthy with our 90% coverage benefit, which provides access to the nearby gym: Forus Selection to keep you energized throughout the day

• Health Insurance
  We take the health and well-being of our employees seriously, which is why we offer a comprehensive health insurance plan and the option to extend it to your spouse and children.

At Axpo Group, we are dedicated to fostering a culture of non-discrimination, tolerance, and inclusion. As an equal opportunity employer, we welcome applications regardless of race and ethnicity, gender identity and expression, sexual orientation, age, disability, as well as socioeconomic, cultural, and religious background. We are committed to ensuring a respectful and inclusive recruiting process and workplace for everyone.