AI / Machine Learning Engineer II

Ali Aydi; Berlin; Hybrid; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Annual L&D budget €2,000 for attending

VSOP program stake in SumUp

Pension scheme: employer match 20%

30 Days Sabbatical after 3 years

Referral Bonus

Urban Sports Club subsidy

Kita placement assistance

Relocation assistance

Subsidised office lunches

Job summary

SumUp in Berlin is seeking a Senior Machine Learning Engineer to lead the development of AI models and systems that power our customer support experience. You will design, build and deploy scalable ML solutions in production, collaborating with backend engineers, data scientists and product managers.

Join an office-first team to shape AI-driven initiatives across fintech products used by merchants worldwide.

Qualifications

• Bachelor's degree in Machine Learning, Computer Science or an engineering-related field.
• 4+ years of proven experience as a Machine Learning Engineer, building and deploying scalable AI solutions and data-driven systems.
• Experience building AI products such as Chatbot Assistant or RAG systems.

Responsibilities

• Design, develop and deploy AI solutions and systems in production environments, ensuring reliability, performance and scalability.
• Collaborate with data scientists, product managers, developers and stakeholders to bring AI solutions to Customer Support.
• Develop and maintain ML infrastructure and pipelines for data processing, model training and serving.
• Optimize and fine-tune models to improve accuracy and efficiency.
• Prepare data: collect, preprocess and clean large text datasets for training and evaluation.
• Apply software development best practices including version control, CI/CD and unit testing.
• Collaborate with cross-functional teams to integrate ML solutions into applications and platforms.

Skills

ML Engineer

Python

Cloud services

MLOps

LLMs

Education

Bachelor's degree in Machine Learning/CS/Engineering

Tools

MLflow

Kubeflow

Airflow

Langfuse

Job description

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 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 an AI / Machine Learning Engineer at SumUp, you will be responsible for building and optimising 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

• 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.
• 4+ 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.
• Solid Software development engineering skills to design computationally effective solutions and maintain them 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 algorithm optimisation, feature engineering pipelines, data ingestion and transformation.

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

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Details

Occupation Informatique & développement

Reference ai-machine-learning-engineer-ii-berlin-137128