Senior Platform Engineer

Senior Platform Engineer at SumUp in Berlin, Germany (Full Time, No Remote)

About the Role

At SumUp, our contact centre platform is a critical component that ensures merchant support runs smoothly across all global markets. As a Senior Platform Engineer, you will take full technical ownership of this space, reviewing current setups, driving new technology implementations, and leading AI-powered support initiatives.

• Review the current contact centre setup to identify areas for improvement
• Design and enhance automation and AI-powered self-service solutions, including conversational AI agents and intelligent call routing
• Administer and evolve our Five9 environment, maintaining integrations with internal systems via APIs and Salesforce
• Lead the implementation of AI voice solutions, including an Agent Copilot tool for real-time support during calls
• Collaborate closely with operations, product, and engineering teams to align on tooling decisions that reduce friction for merchants and agents
• Mentor junior team members to build contact centre and AI capability across the team

What You Bring

We are looking for a Senior Platform Engineer with solid experience in contact centre platform development and administration, hands-on knowledge of Five9 or similar platforms, and strong API integration skills. Proficiency in JavaScript and Salesforce is required, along with comfort working in distributed systems environments.

• Experience building AI tools such as LLM APIs, conversational AI platforms, or automation frameworks
• A deep understanding of how to apply these tools to improve support operations

About SumUp

SumUp is a global payments technology company that provides businesses with the tools they need to accept and manage payments. Our mission is to make it easy for anyone to start, run, and grow their business.

Ready to Apply?

To apply, complete your application directly on this page, or you'll be redirected to the employer's application platform to finish submitting there.