Senior Software Engineer: Architecture & Agentic Systems (m/f/d)

A11 is the execution engine behind Europe’s top tech unicorns like Trade Republic, Sennder and Kry. We are a SWAT team for business performance in different expertise areas ranging from Marketing, Sales, Data, Tech to People Ops. With 100+ international experts, we step in with tactical precision to tackle complex challenges across business and tech. From launching products at speed to reshaping entire business models, we deliver impact.
About the Job
We're looking for a driven and impactful Senior Software Engineer: Architecture & Agentic Systems to drive transformation through building solutions that bring real results.
As a Senior Software Engineer: Architecture & Agentic Systems, you'll build and scale a variety of engineering projects through bringing your expertise in system architecture, Python and production agentic/LLM systems to fuel change and measurable impact.
In this role, you’ll:
Own the architecture and technology choices for AI-native, agentic products, from the whiteboard to production
Build hands-on in Python: agent orchestration, tool-calling and integrations
Set engineering standards through code reviews and best practices
Keep nearshore teams aligned on architecture, priorities and quality
Translate business needs into robust, scalable system designs
Explain trade-offs clearly to engineers and to business stakeholders
Your Profile:
5+ years of experience in software engineering
Real system-design experience
Production work with agentic or LLM systems
Strong Python skills
The ability to explain trade-offs to engineers and to business stakeholders
A get-things-done mindset: you ship and don't wait for perfect specs
Comfort with ambiguity; you think in products, not tickets
Fluent German and English
Please note that this position is based in Berlin.
Why Join A11:
Shape the Future of Innovation: Take the lead on game-changing projects across a diverse range of companies and geographies. You'll make a true impact through our strategic and hands-on working style.
Collaborate with an International Team of Digital Natives: Unlock new opportunities to learn, contribute, and thrive in a dynamic, multicultural environment. Our Team represents over 25 nationalities and brings experience in a wide range of companies and industries.
Career Development: We support growth in every direction—whether you want to deepen your expertise, lead a department or explore new areas.
Embrace Change and New Technologies: We actively try out new tools and AI features to optimise our workflows and processes, giving you creative freedom and autonomy to reach your goals.
Exchange and Discover: From shared meals with the Team to fun offsites to frequently hosted meetups, you'll build lasting connections through regular events and dynamic knowledge-sharing opportunities.
If you’re looking to accelerate growth and generate high impact, we want to hear from you!
Our Commitment to Diversity and Inclusion
A11 is committed to diversity and equal opportunities for all – applicants and employees alike. We value humans – with all our glorious multifaceted backgrounds, perspectives, and experiences. Our diverse team has different ethnic and cultural origins, gender identities, sexual orientations, family arrangements, religious and political affiliations, socioeconomic statuses, age groups, and abilities.