Lead Developer Expert

Company Description

At T-Systems, you will find groundbreaking projects that contribute to social and ecological well-being. We want to welcome new talents like you, who bring fresh ideas, different points of view, who accept challenges and continuous learning, to grow and impact society… All this, in a fun way!

It doesn't matter when or where you work. It's about doing work that matters to move society forward. For this reason, we will do everything possible to ensure that you have every opportunity to develop by offering you a support network, excellent technology, a new work environment and the freedom to work independently. We support you to constantly grow both personally and professionally, so that you can leave a notable mark on society.

T-Systems is a team of around 28,000 people employed around the world, making us one of the world's leading providers of integrated end-to-end solutions. We develop hybrid cloud and artificial intelligence solutions and drive the digital transformation of companies, industry, the public sector and, ultimately, society as a whole.

Job Description

About Us
We are the responsible team within Deutsche Telekom technology to enable and drive Data Science & AI use cases. Our team is responsible for the GenAI platform and the implementation of high-priority AI projects. To maximize business value, these AI use cases must be integrated into operational systems. Therefor we are looking for an experienced Software Engineer to work with our AI Teams and establish best software engineering practices and help design scalable, robust architectures. This role offers exposure to cutting-edge GenAI technologies (e.g., multimodal AI, agentic AI) in a high-impact, scaled environment.
Your Responsibilities:
• Collaborate with AI/ML teams to help develop scalable, maintainable software solutions for AI-driven applications.
• Establish best practices in software engineering, including architecture, modularization, and API management.
• Improve development workflows with TDD, DDD, GitOps, CI/CD, and automated testing. • Work with containerization & orchestration tools (e.g. Docker, Kubernetes, Terraform, Helm).
• Enforce security by integrating with our Identity and Access Management.

Qualifications

Your Skills & Experience:
Software Engineering Best Practices:
• Architectural patterns (e.g. SOLID, GRASP)
• Modularization & packaging
• API development & integration
Development Workflows:
• Project structure & clean code principles
• TDD (Test-Driven Development) & DDD (Domain-Driven Development)
• GitOps (branching, merging, linting, CI/CD pipelines
Cloud & DevOps:
• Docker & orchestration (Swarm, Compose, Kubernetes)
• Configuration scripting (Terraform, Helm)
• Cloud experience in at least one hyperscaler environment
• Authentication & IAM (OAuth2, security best practices)
Tools & Languages:
• GitLab, Python (experience in other languages is a plus)
Bonus Skills (Nice to Have)
• Telekom knowledge (Networks, Platforms)
• Deutsche Telekom ecosystem (Security, Privacy, Tardis, Internal Network)

Additional Information

What do we offer you?

• International, positive, dynamic and motivated work environment.
• Hybrid work model (teleworking/on-site).
• Flexible schedule.
• Continuous training: Preparation for certifications, access to Coursera, weekly English and German classes...
• Flexible compensation plan: health insurance, meal vouchers, childcare, transport assistance...
• Life and accident insurance.
• More than 26 working days of vacation per year.
• Social fund.
• Free service for specialists (doctors, physiotherapists, nutritionists, psychologists, lawyers...)
• 100% of salary in case of sick leave.

And many more advantages of being part of T-Systems!

If you are looking for a new challenge, do not hesitate to send us your CV. Join our team!

T-Systems Iberia will only process the CVs of candidates who meet the requirements specified for each offer.