Data Scientist at SumUp | Berlin

Join Our Dynamic AI Team:At SumUp, a leader in the fintech space, we are dedicated to providing an unparalleled customer experience. Our Global Operations team seeks a talented and enthusiastic Data Scientist to enhance our AI initiatives. You will play a pivotal role in developing models that directly impact customer interactions and the overall efficacy of…

About the Team: Join our dynamic Commercial Analytics Team within Finance at SumUp, where we are on the lookout for a talented Data Analyst to bolster our strategic initiatives. In this pivotal role, you will collaborate closely with the Global and European Finance Planning & Analysis (FP&A) teams, developing data models, crafting insightful reports and dashboards, and performing advanced analyses that drive impactful business decisions. Your contributions will significantly shape our business outcomes while you engage with an experienced data team, furthering the growth of our analytics chapter. Your Responsibilities: Design and manage efficient data models to monitor financial performance and key performance indicators (KPIs) throughout the customer lifecycle—from acquisition to churn—tracking metrics like recurring revenue, payback, lifetime value, and customer acquisition cost (utilizing dbt). Create user-friendly dashboards that empower self-service analytics for the Finance team and SumUp leadership. Collaborate with stakeholders to translate data into actionable insights, merging quantitative analysis with business context to facilitate informed decision-making. Contribute to data-driven objectives aligned with SumUp’s business goals, including merchant segmentation and performance evaluation. Work alongside cross-functional teams to ensure reliable data collection, proper structuring, and ease of access for analytical purposes. What We Are Looking For: At least 2 years of experience in data analytics and data modeling, ideally with practical experience. Proficient in creating advanced reports and dashboards using Google Sheets or similar tools. Experience in developing scalable, user-friendly dashboards adhering to best practices, preferably with Tableau or comparable visualization tools. Ability to translate financial and business requirements into meaningful KPIs, data models, and actionable insights across various functions. Strong problem-solving and critical thinking abilities, with excellent communication skills for effective collaboration with go-to-market and leadership stakeholders. A solid technical foundation paired with business acumen in finance, stakeholder management, and data visualization. Why Join SumUp? Be part of a global team working on large-scale fintech products utilized by millions of businesses worldwide, all from our Berlin office. This includes an office-friendly environment that fosters collaboration and innovation.

The AML AI Engineering Squad, a dynamic cross-functional team within the Risk & Compliance tribe, is at the forefront of developing state-of-the-art data products and machine learning solutions. Our mission is to enhance Transaction Monitoring and safeguard our merchant base against Money Laundering and Financial Crime. We leverage automation, AI, and engineering excellence to create innovative products that empower Risk and AML teams to operate more intelligently and efficiently.As a Senior Data Engineer, you will play a pivotal role in establishing a robust, high-quality data foundation that enhances efficiency, drives AI-driven automation, and facilitates data-informed decisions for our Risk and AML teams. Your expertise will be crucial in building and maintaining data pipelines within our system, ensuring that analysts, product managers, and AI systems have access to reliable and trusted data.Join us in shaping the future of financial safety and making a significant impact!

Team OverviewThe Card Not Present (CNP) Protect team is a dynamic, cross-functional unit within SumUp's Risk & Compliance tribe. We are dedicated to safeguarding millions of merchants by mitigating fraud in our card-not-present offerings. Our team excels in developing robust machine learning systems and data pipelines that facilitate real-time automated decision-making. We are currently enhancing our infrastructure to incorporate foundation model embeddings. This role offers significant ownership and impact, directly influencing the efficacy of our fraud detection mechanisms.Key ResponsibilitiesDesign, implement, and sustain high-quality Python-based data pipelines that support machine learning workflows, featuring real-time and near-real-time data processing.Assume complete responsibility for data quality and reliability, executing validations, automated testing, monitoring, and alerting with established SLAs.Enhance our data foundation by meticulously documenting architecture, data lineage, dataset definitions, and managing dependencies.Lead the governance of our Feature Store, refining usability and standardizing setup to enable data scientists to operate with speed and confidence.Collaborate closely with the Risk Platform, ML Data Platform, data scientists, software engineers, and analysts to ensure safe deployment of changes to production.

At SumUp, our mission is to create a fair playing field for small businesses. We empower entrepreneurs by providing them with user-friendly and cost-effective tools for managing payments, finances, and customer relationships.As an Engineering Manager, you will spearhead a new team dedicated to constructing the analytical and commercial backbone of SumUp's global sales channels. You will be responsible for merging attribution and commission models into a cohesive, scalable product that serves as a single, reliable source for commercial insights and incentive operations.Your role will encompass overseeing the newly formed Commercial Systems & Intelligence domain within the Acquisition Value stream, collaborating with various Sales Channels, as well as Pricing, Commissions & Incentives.We seek a hands-on, technically adept leader who can drive excellence in delivery, uphold high engineering standards, and enhance SumUp’s capacity to operate swiftly while ensuring quality and reliability in our web and platform ecosystems.This position uniquely intersects data, commercial strategy, and product development. You will work closely with Analytics, Data Platform, and Revenue teams to transition our methodology from isolated models to a robust, service-oriented product that effectively links analytics and operations.

Join our dynamic Design System team as an iOS Engineer at SumUp, where your expertise will shape the future of our user interface components and experience patterns. Your role will empower product teams to create cohesive and accessible user experiences, translating SumUp’s design language into a comprehensive, reusable library.As our team expands to support SumUp’s diverse ecosystem of merchant and consumer-facing products, you will have the unique opportunity to optimize and enhance a system that accelerates the development of high-quality features for millions of users around the globe.Your responsibilities will include:Defining the core user and developer experience within SumUp’s iOS ecosystem.Collaborating closely with product and design teams to develop maintainable, usable, and aesthetically pleasing components.Integrating accessibility best practices into every component, ensuring inclusivity through careful attention to content descriptions, touch target sizes, color contrast, and dynamic type.Providing hands-on technical support to product teams to help achieve company objectives, including an upcoming brand refresh.Reviewing code contributions, upholding design-system standards, and mentoring engineers on best practices for reusable UI development.Transitioning legacy UIKit components to SwiftUI while ensuring system stability.Proactively identifying and addressing technical debt to maintain high engineering standards and codebase health.

About the Role As the Chief of Staff at SumUp, you will serve as a strategic ally to a C-level executive, facilitating the translation of organizational strategy into actionable plans. This pivotal role involves overseeing, planning, and communicating global initiatives and projects while enhancing the efficiency of various teams and processes. You will engage in close collaboration with C-level stakeholders to manage a wide range of topics and initiatives. Your responsibilities will encompass project management, strategic initiative oversight, communications, and cross-functional coordination, requiring a deep understanding of SumUp's context and an ability to handle sensitive and confidential information. This position significantly impacts decision-making at the leadership level. Beyond project delivery, the Chief of Staff will drive essential events and communications, including all-employee meetings, retreats, and quarterly OKR reviews, ensuring that our mission and strategy remain central to these interactions. In essence, you will play a crucial role in shaping the future of SumUp. What You’ll Do Collaborate across functions to facilitate change, advance strategic projects, and ensure teams meet their objectives. Plan and facilitate key meetings, such as board meetings, OKR sessions, and annual retreats. Continuously enhance collaborative practices within teams. Manage budget and financial planning in conjunction with FP&A, particularly concerning Capital Allocation Agreements. Coordinate resources for special initiatives and projects, including project management follow-through, and at times, leading specific initiatives. Organize pivotal team events that reinforce company culture, connectivity, and alignment with strategic goals. Communicate effectively through compelling internal and external storytelling.

Role overview SumUp seeks a Senior Internal Auditor in Berlin to help ensure the integrity of its financial operations. The position centers on maintaining and refining internal audit procedures, with the goal of supporting both efficiency and compliance across the organization. What you will do Carry out internal audits to evaluate financial controls and processes Collaborate with teams from various departments to collect information and review procedures Spot opportunities for improvement and offer practical recommendations Provide insights that shape financial strategies and guide decision-making Location This role is based in Berlin, Germany.

Role overview SumUp is looking for a Senior Product Designer to join the team in Berlin. This role centers on creating design solutions that make user experiences smoother and more intuitive across SumUp’s products. The team welcomes creative perspectives and values strategic thinking, especially from designers who care about putting users first. What you will do Collaborate with cross-functional teams to help shape the product vision Develop wireframes and prototypes to express and test design concepts Organize and run user testing sessions to collect feedback and improve designs Lead design processes to deliver products that are both functional and visually engaging Requirements Background in designing digital products with attention to usability and visual quality Creative and strategic approach to solving product challenges Experience working effectively within collaborative, cross-functional teams This position is based in Berlin, Germany.

(Flexible start date, internship duration: at least 4 months)At SumUp, we are committed to empowering small businesses worldwide by offering simple and affordable financial tools that help them thrive. Today, over 4 million businesses across 36 markets depend on SumUp as their trusted financial partner for managing payments, finances, and customer relationships.We are seeking a Revenue Planning Intern to join our vibrant Revenue Operations (RevOps) team. This is a unique opportunity to delve into the financial engine of a rapidly growing FinTech company, gaining practical experience in financial modeling, forecasting, and performance analysis.This internship is not just a learning experience; it plays a crucial role in enhancing our analytical capabilities during a phase of rapid growth and increasing operational complexity. You will be instrumental in supporting essential weekly and monthly reporting, maintaining key revenue forecasting models, and assisting in building our future talent pipeline.If you are enthusiastic about making a meaningful impact and eager to learn from the ground up, this position is perfect for you!

Revenue Planning Analyst Location: Berlin | Office-first About Our Team The Revenue Planning team is a pivotal component of SumUp's commercial framework, expertly transforming intricate data regarding products, markets, and merchant segments into actionable financial insights that guide our growth trajectory. As we expand our influence—from automating forecasting processes to enhancing our finance business partnerships—this role becomes crucial. You will engage with models and analyses that directly impact the allocation of marketing investments across millions of merchants in diverse markets, granting you significant commercial responsibility early in your career. Your Responsibilities Enhance and maintain the Customer Acquisition Budget (CAB) consolidation model, creating a unified Payback view by country across European channels. Facilitate the migration of forecasting processes from Google Sheets to scalable platforms like Pigment, boosting accuracy across various products and markets. Serve as the finance business partner for Brand Marketing, overseeing the Acquisition forecasting process and aiding in the Brand performance matrix. Conduct in-depth analyses across countries, channels, and merchant segments to uncover opportunities for optimizing CAB spending and enhancing Payback. Develop financial models to bolster product-level revenue and Payback forecasting. Assist the Operations team with a merchant acquisition forecast segmented by category to streamline onboarding and customer support planning. Ideal Candidate Profile Demonstrated experience in an analytical capacity such as Financial Planning & Analysis (FP&A), business analytics, consulting, or data analytics, with practical exposure to financial modeling or forecasting. Exceptional proficiency in Excel or Google Sheets, capable of independently developing, maintaining, and refining complex models. Familiarity with SQL and the ability to extract and manipulate data from databases effectively. Skilled in transforming business inquiries into structured analytical frameworks and conveying findings clearly to non-technical stakeholders. Proficient in managing multiple priorities within a cross-functional environment, exhibiting a proactive and organized approach to ownership. Why Join SumUp? Seize the opportunity to collaborate with a global team of SumUppers on large-scale fintech products that serve millions of businesses worldwide.

At Enpal, we are more than just a company; we are a pioneering movement. As a prominent greentech unicorn and one of Europe’s fastest-growing energy providers, our mission is to make solar energy accessible and simple for homeowners throughout the continent. Our forward-thinking business model for solar panels, heat pumps, home energy storage solutions, and EV charging stations is transforming the residential energy landscape. We empower homeowners to adopt clean energy, setting the stage for a sustainable and decentralized energy future.As the foremost leader in residential solar, Enpal is advancing its next venture: Enpal Energy, our platform designed for the management, optimization, and orchestration of millions of distributed energy assets. This includes the development of Europe’s largest Virtual Power Plant (VPP), which connects solar systems, batteries, heat pumps, and EV chargers to actively stabilize the grid and create new revenue opportunities for our customers.We envision a bold future: to be the cornerstone of Europe’s shift towards distributed, intelligent, and clean energy generation.We are in search of a Data Scientist to enhance our expanding Energy Data Science team. Your contributions will directly influence energy trading decisions within one of Europe's largest residential energy communities, having a tangible impact on our participation in the energy market. This role is tailored for a proactive data scientist with robust software engineering skills and experience across the entire data and ML stack.Key ResponsibilitiesDevelop, research, and implement time series forecasting models for energy markets (including load, generation, and weather forecasting), managing the complete lifecycle from data exploration and feature engineering to model training, evaluation, deployment, monitoring, and retraining.Enhance our MLOps infrastructure by contributing to experiment tracking, model versioning, automated retraining pipelines, and production observability.Effectively communicate forecasting performance and model insights to trading and product stakeholders, bridging the gap between technical results and business impact.Collaborate intimately with Data Engineers, Software Engineers, and Product teams to produce well-engineered, reliable data science solutions.Play a pivotal role in shaping our data science roadmap and contribute to innovative forecasting methodologies.Guide and mentor junior data scientists, fostering a collaborative learning environment.

At SumUp, our mission is to empower small businesses by leveling the playing field. We provide small business owners with intuitive and affordable tools to manage payments, finance, and customer relationships. This pivotal engineering leadership position within our Lifecycle Tribe is dedicated to building and refining a world-class, high-performing website that serves as the gateway for merchants to discover, assess, and engage with SumUp—from their first interaction through activation and beyond. You will lead cross-functional teams focused on customer-facing platforms and digital experiences that are fundamental to how merchants interact with SumUp. Your work will involve tackling modern web architectures, addressing scalability challenges, and employing data-informed decision-making to enhance quality and performance. We are looking for someone with substantial hands-on experience in developing and managing large-scale, consumer-grade websites where performance, accessibility, and rapid iteration are of utmost importance. We seek a hands-on, technically proficient leader who can champion delivery excellence, uphold high engineering standards, and reinforce SumUp's capacity to act swiftly while ensuring quality and reliability across our web and platform ecosystems.

Your RoleDevelop, test, and deploy models that enhance Peec AI's recommendations, enabling customers to improve their visibility in AI-driven searches.Create algorithms to derive actionable insights from AI search behaviors, delivering data-informed suggestions that elevate brand visibility in AI search.Manage the complete model lifecycle from research to production, collaborating closely with engineering to seamlessly integrate machine learning solutions into our systems.Design and implement robust data pipelines to ingest, process, and analyze extensive datasets.QualificationsDemonstrated backend development expertise in Python, with experience in building APIs, data pipelines, or machine learning infrastructure, and familiarity with tools such as FastAPI, Docker, and cloud platforms (preferably GCP).A profound interest in understanding how LLMs function, with the capability to reverse-engineer AI search behavior and translate findings into actionable product features.A proven ability to transition projects from research to production in a fast-paced startup environment, showcasing strong problem-solving skills and adaptability in addressing ambiguous and evolving challenges.Exceptional communication skills, capable of articulating complex technical concepts to both customers and stakeholders.Our Data Science StackLanguages: Python, SQLLibraries: Pandas, NumPy, HuggingFace, PyTorch, TensorFlow, ONNXBackend: GCP, Cloud Functions, Firestore, Postgres, AlloyDB, BigQueryAI Models: OpenAI, Claude, Perplexity, Gemini, Llama, etc.Bonus PointsContributions to open-source projects.Deployment of side/hobby projects.

About zenjob zenjob connects companies with temporary workers through an AI-powered staffing platform. Since 2015, zenjob has helped businesses instantly book staff and enabled students to find part-time jobs that fit their academic schedules. The platform serves over 40,000 students and 1,000 partner companies in logistics, retail, and hospitality across major German cities. The team believes that advanced technology and genuine commitment lead to great work. Role Overview: Data Scientist The Data Scientist will analyze and optimize marketplace performance while uncovering talent behavior from first engagement through long-term retention. This role sits within a centralized Analytics & Data Science team, working closely with Marketing, Sales, Product & Engineering, and Operations. The main goal: define clear metrics, build reliable data models, and turn complex analysis into business decisions that drive results. Main Focus Areas Marketing Effectiveness: Study the impact of different channels and campaigns on growth. Talent Lifecycle: Explore user behavior from acquisition and activation to retention and lifetime value. Marketplace Performance: Examine how supply and demand interact on the platform. Your Responsibilities Define and maintain key metrics across the marketplace and user lifecycle, using reliable dbt models trusted by all teams. Build self-service dashboards, reporting layers, and playbooks that make data more accessible and actionable for internal teams. Develop attribution and measurement models (such as multi-touch attribution, data-driven attribution, and Marketing Mix Models) to assess channel effectiveness in acquisition and engagement. Model talent behavior with a focus on conversion, retention, and Customer Lifetime Value to support sustainable marketplace growth. Design and evaluate experiments (including A/B tests and incrementality tests) to measure the causal impact of marketing and product changes.

At Almedia, we are redefining the landscape of marketing and user engagement. As one of Europe’s fastest-growing companies, we are on a mission to become Germany’s second bootstrapped unicorn. Our innovative platform rewards a community of over 60 million users for interacting with our advertisers’ products, creating a unique ecosystem for user acquisition.We are seeking talented Data Scientists to join our dynamic team in Berlin, where you will play a crucial role in enhancing our product and data capabilities.In this high-impact position, you will leverage your expertise in hands-on modeling and cross-functional leadership to enable us to better understand user behaviors, optimize incentive structures, and lay the groundwork for scalable, data-driven decision-making.

Team Overview The AI AML Engineering Squad at SumUp works at the intersection of machine learning and financial crime prevention. The team builds data products and machine learning systems that help keep SumUp's transaction monitoring effective and compliant in 37 countries. Senior Data Scientists here oversee the models, pipelines, and risk scoring that flag and escalate suspicious activities, always with a focus on regulatory standards. What You Will Do Develop, maintain, and improve machine learning models and batch training pipelines for anti-money laundering (AML) transaction monitoring, focusing on detection accuracy, operational efficiency, and regulatory compliance. Design and engineer features for the Feature Store, using AML typologies and suspicious behavior patterns. Work closely with AML investigators to turn domain knowledge into alerting logic and set thresholds. Run sensitivity analyses on synthetic datasets. Prepare governance materials like model cards and ensure documentation meets audit standards. Own the AML Risk Score: analyze what drives it, monitor changes, conduct back-testing, and suggest improvements to features, logic, and thresholds. Work with AML Operations, Product, and Engineering teams to turn stakeholder needs into practical, scalable data science solutions. Track and improve detection performance metrics, adjust solutions for regional compliance, and contribute to system design documentation. What We Look For Advanced Python skills, including hands-on data engineering experience and a background in building production-ready machine learning workflows. Expertise in feature engineering and unsupervised machine learning. Ability to translate domain knowledge into model behaviors and alerting logic. Experience deploying machine learning applications and managing end-to-end pipelines (monitoring, versioning, rollback), especially in regulated settings. Location This position is based in Berlin, Germany.

Join our innovative team at billie as a Data Scientist (w/m/d) in the vibrant city of Berlin. We are seeking a data-driven individual who is passionate about leveraging data to drive business decisions and improve outcomes. This role involves analyzing complex data sets, building predictive models, and collaborating with cross-functional teams to enhance our product offerings.

Join Almedia, a cutting-edge company reshaping the marketing landscape and striving to become Germany's next bootstrapped unicorn. Recognized as Europe's third fastest-growing company in 2025 (FT1000), we provide an exceptional environment for ambitious professionals to accelerate their careers.Our innovative platform rewards a vibrant community of over 60 million users for their engagement with top-tier products from global advertisers, presenting a unique opportunity to redefine user acquisition strategies.We are seeking a Creative Data Scientist, specializing in marketing creatives and user acquisition, to leverage data science, advanced statistical techniques, and A/B testing methodologies. Your contributions will directly influence our paid growth performance through deep analysis and optimization of ad creatives.This role is hands-on, grounded in real-time experimentation and measurable outcomes.

At Lever, founded eight years ago, we address one of the most critical challenges faced by organizations: recruiting and hiring exceptional talent. Our mission is to develop the next generation of hiring software, trusted by industry leaders such as Netflix, Yelp, Cirque du Soleil, Shopify, and Spotify to enhance their teams. We have revolutionized the talent acquisition landscape and are proud to be at the forefront of innovation in our field, seeking outstanding individuals to join our journey as we expand. We take great pride in what we’ve accomplished so far, being honored as the #1 workplace in San Francisco and recognized among the top employers across the United States. Our greatest asset is our people; we are committed to investing in our 'Leveroos' and fostering a culture that prioritizes our team members. Join us as a Data Scientist!