SumUp Tech Stack

Global fintech payments platform for small-business merchants

Financial Services London 1,001–5,000 employees Privately Held

SumUp operates a multi-product fintech stack serving 4 million merchants across 37 markets, built on AWS, Kubernetes, Go, Kotlin, and Elixir with streaming (Kafka, RabbitMQ) and ML infrastructure (MLflow, Kubeflow, Airflow). The hiring mix is heavily sales-weighted (491 roles vs. 73 engineering), reflecting a field-driven acquisition model—the company is actively building freelance sales teams and regional presence in 20+ countries while grappling with merchant churn and AML compliance at scale. Recent stack shifts (replacing dbt and Snowflake, adopting Kotlin Multiplatform) suggest a move from centralized analytics toward client-side mobile-first development and fraud detection.

Tech Stack 178 technologies

Core StackAWS Docker Kubernetes Go Kotlin Elixir Java Ruby Kafka RabbitMQ GitHub Actions Jenkins ArgoCD PostgreSQL Python MLflow Kubeflow Apache Airflow SAP SQL Excel Android Bluetooth Low Energy AWS SNS GCP Azure Langfuse Fastlane Kotlin Multiplatform Google Sheets+143 more

AdoptingKotlin Multiplatform Notion

Replacingdbt Snowflake Kandji Jamf

What SumUp Is Building

◆Challenges

Small businesses lack efficient payment solutions
Compliance with aml regulations
Accelerating growth in dynamic region
Managing freelance sales teams
Ensuring aml compliance
Acquiring new merchants
Scaling sales teams
Retaining merchants
Reducing merchant churn
Data governance gaps

▲Active Projects

Build high-performing field team
Build a connected community of freelancers
Germany strategy development
Launch and grow presence across multiple cities and territories
Recruit and coach field sales representatives
Building fraud performance dashboards
Establish clear performance routines and communication rhythm
Brazilian transfers ecosystem
Automation initiatives
Performance monitoring and regression-detection platforms

Hiring Activity

Steady700 roles · 300 in 30d

Department

Sales

491

Engineering

Support

Ops

Finance

Marketing

Product

Seniority

Junior

267

Mid

229

Senior

112

Manager

Lead

Intern

Director

Staff

Notable leadership hires: Sales Team Lead, Field Sales Lead, Operations Enablement Lead, Head of Accounting, Chief of Staff

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About SumUp

SumUp is a fintech company providing payment processing, point-of-sale systems, business accounts, invoicing, and customer loyalty tools to small merchants. Founded in 2012, the company operates in 37 markets with over 3,000 employees across 20 offices globally. The product portfolio spans mobile and card-reader payments, digital payment links, and business finance management. SumUp operates a sales-led go-to-market model with significant regional focus—hiring is active across Brazil, Germany, UK, France, and 15+ other countries. The company faces operational challenges around merchant retention, AML compliance automation, and scaling freelance-based field sales teams across high-growth regions.

HeadquartersLondon

Company Size1,001–5,000 employees

Hiring MarketsBrazil, Chile, United Kingdom, Bulgaria, Germany, France, Lithuania, Italy

Frequently Asked Questions

What technology stack does SumUp use?

SumUp runs on AWS, Kubernetes, and Docker with backend services in Go, Kotlin, Elixir, and Java. Data pipelines use Kafka, RabbitMQ, PostgreSQL, and Apache Airflow; ML relies on MLflow and Kubeflow. Mobile clients use Kotlin Multiplatform and Android with Bluetooth Low Energy for card readers.

Where is SumUp headquartered and how many employees?

SumUp is headquartered in London and has 1,001–5,000 employees globally. The company operates 20 offices across multiple continents with team members representing 90+ nationalities.