---
title: 'Senior Machine Learning Engineer I at SumUp'
canonical: 'https://feeny.ai/job/senior-machine-learning-engineer-i-sumup-berlin-78nswgr6bc5j'
type: 'job'
last_seen: '2026-09-08'
---

# Senior Machine Learning Engineer I at SumUp

- **Company:** SumUp
- **Location:** Berlin, Germany
- **Posted:** 2026-07-06
- **Last confirmed live:** 2026-09-08
- **Apply:** https://sumup.com/careers/positions/8498275002?gh_jid=8498275002

## Job description

About the team:

Within the Global Operations organisation, our mission is to build the best customer experience in the fintech industry by delivering an effortless customer experience to all our merchants. We are seeking a skilled and passionate Senior AI / Machine Learning Engineer to join our talented AI team and lead the development of AI models and algorithms that will drive our customer support service to new heights.

As a Senior AI / Machine Learning Engineer at SumUp, you will be responsible for building and optimizing state-of-the-art AI models and algorithms. Your expertise with machine learning, deep learning, and LLMs will be crucial in driving the success of our AI-driven initiatives. You will work closely with cross-functional teams, including backend engineers, data scientists and product managers, to translate business requirements into innovative AI solutions. Your contributions will shape the future of our support products and help us stay at the forefront of technological advancements in the field of AI.

## What you’ll do

- Architect, design, develop and deploy our AI solutions and systems in production environments, ensuring reliability, high performance and scalability.
- Collaborate and communicate closely with data scientists, product managers, developers and other business stakeholders to bring state-of-the-art AI solutions to Customer Support, enhancing customer experience and improving operational efficiency.
- Develop and maintain ML infrastructure and pipelines to support efficient data processing, model training and serving.
- Optimize and fine-tune machine learning models to improve accuracy, efficiency and scalability.
- Collect, preprocess and clean large text datasets to ensure high-quality input for model training and evaluation.
- Embrace software development principles, best practices and industry standards, including version control, CI/CD processes and unit testing frameworks as your day-to-day work.
- Collaborate with cross-functional teams to ensure seamless integration of machine learning solutions into software applications and platforms.

You’ll be great for this position if you have:

- Bachelor’s degree in Machine Learning, Computer Science or an engineering-related field.
- +8 years of proven experience working as a Machine Learning Engineer, focusing on building and deploying scalable machine learning or AI solutions and data-driven systems.
- Relevant experience building AI products, such as Chatbot Assistant, RAG system, etc.
- Excellent software development engineering skills to design computationally effective solutions and maintenance in large-scale production environments (data version control, model serving, continuous monitoring & alerting)
- Experience building and deploying ML models using cloud services (AWS, GCP, or Azure).
- Expert in Python and familiarity with MLOps tools (e.g., MLflow, Kubeflow, Airflow, Langfuse).
- Experience with machine learning workflow orchestration and algorithms optimisation, feature engineering pipelines, data ingestion and transformation.
- Good understanding of data pipelines, APIs, containers (Docker), and version control (Git).
- Excellent analytical and problem-solving skills, with strong attention to detail.
- You have working proficiency and communication skills in verbal and written English.

Why you should join SumUp:

🌍 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup.

🌈 Commitment to Diversity and Inclusion: Be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced

📚 A dedicated annual L&D budget of €2,000 for attending conferences and/or advancing your career through further education.

🚀 Enrolment onto our VSOP program: You will own a stake in SumUp’s future success

💶 A corporate pension scheme where we match up to 20% of your contributions

🔄 30 Days Sabbatical: Enjoy the unique opportunity to take a well-deserved break with our 30 days sabbatical benefit after completing 3 years of employment with SumUp.

🔗 Referral Bonus: Earn additional rewards by referring talented individuals to join the SumUp team.

🚵🏾‍♂️ Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, relocation assistance, subsidised office lunches.

About us:

SumUp is a leading financial technology company, founded in 2012 with the goal of empowering small businesses around the globe. We’re the financial partner of choice for more than 4 million merchants in over 35 markets. We collectively build, plan and fine-tune the technology that drives SumUp and empowers small businesses around the world.

We believe in the everyday hero. Those who have the courage to follow their passion and who have the strength and determination to realise their dreams. Small business owners are at the heart of all we do, so we're creating powerful, easy-to-use financial solutions to help them run their business. With a founders mentality and a 'team-first attitude' our diverse teams across Europe, South America, and the United States work together to ensure that small business owners can be successful doing what they love.

SumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. SumUp does not make hiring or employment decisions on the basis of race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by Company policy. SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind. Job Application Tip

We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.

## About SumUp

## Company Overview
- **One-liner**: SumUp is a global fintech company that provides simple, affordable payment and financial management tools to help small businesses start, run, and grow.
- **Entity Type**: Private (Funding stage not publicly available)
- **Headquarters**: London, United Kingdom
- **Founded**: 2012
- **Founders**: Not specified in provided sources

## Core Business
- **Primary industry**: Financial Services / Fintech (Payments)
- **Target customers**: Small and medium-sized businesses (SMBs), B2B
- **Mission or purpose statement**: "Empower small businesses all over the world." — with the vision of "a world where everyone can build a thriving business."

## Products & Services
- **Payment Processing (Card Readers & POS)**: Hardware and software solutions for in-person and online payments, enabling merchants to accept card and contactless payments.
- **SumUp Business Account**: A digital business account for managing finances and transactions.
- **Invoicing & Customer Relationship Tools**: Tools to create invoices, manage customers, and streamline operations.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Over 4 million merchants served across 37 markets; 3,000+ employees from more than 90 nationalities
- **Notable Investors/Partners**: Not listed in provided sources
- **Growth Signals**: Headcount growth to 3,000+; recognition as a Top Global Employer for inclusion (Stonewall Workplace Equality Index 2022/2023) and Fintech Diversity Initiative of the Year (2025); expansion across 4 continents with 20+ offices.

## Competitive Advantages
- **Global reach**: Operating in 37 markets with localized products and support.
- **Merchant focus**: Deep commitment to small business owners, with products designed specifically for their needs.
- **Inclusive culture**: Strong diversity and inclusion programs, gender parity in workforce, and employee-led communities (e.g., Pride Club).
- **Autonomous teams**: Small, empowered teams with servant leadership, fostering innovation and speed.

## Strategic Focus
- Expanding product and service portfolio to become a complete financial partner for small businesses.
- Continuing to invest in a learning culture (SumUp University) and employee development.
- Maintaining an office-first culture while enabling occasional remote work to balance collaboration and flexibility.
- Growing market presence by entering new geographies and deepening existing ones.

## Why Work Here
- **Culture**: Office-first company that values human connection, autonomy, and continuous learning. Core values include Team First, We Care, and Founder’s Mentality.
- **Remote/Hybrid policy**: Office-first with the ability to work remotely occasionally, as agreed with teams.
- **Benefits**: Relocation support for overseas hires, dedicated budget for conferences and external training, and location-specific perks.
- **Engineering culture**: Autonomous teams, servant leadership, and a focus on pragmatic, self-driven problem-solving.
- **Inclusion**: Recognized as a Top Global Employer for inclusion; active LGBTQ+ community and gender parity initiatives.
- **Hiring process**: Transparent, with recruiter screening, hiring manager interview, technical assessment, team interview, bar raiser, and final offer.

## Sources
1. [sumup.com](https://www.sumup.com/careers/)
2. [linkedin.com](https://www.linkedin.com/company/sumup)
3. [sumup.com](https://www.sumup.com/careers/culture/)
4. [sumup.com](https://www.sumup.com/careers/positions/)
5. [sumup.com](https://www.sumup.com/careers/how-we-hire/)

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