Senior Software Engineer I (Data and Reporting)

🏢 Summary: Senior Frontend Software Engineer role focused on building and evolving merchant-facing reporting dashboards and data visualizations for restaurant operators. The position involves designing responsive, accessible interfaces, integrating with backend APIs, and shaping product decisions with high autonomy. The engineer will also mentor others and drive frontend standards within the team. 🗂️ Requirements: 5+ years of professional frontend development experience, Strong proficiency in React, Experience building complex component architectures, Experience with data visualization libraries, Experience building responsive web applications, Experience integrating with RESTful APIs, Understanding of modern frontend tooling, Knowledge of testing practices, Knowledge of performance optimization, Ability to work on-site in Kraków or Gdańsk 2-3 times per week 📃 Skills: React, JavaScript, TypeScript, D3, Recharts, Victory, Chart.js, REST, API, HTML, CSS, Python, Git, Jest, Webpack 🏢 Description: About SpotOn We’re not just building restaurant tech, we’re giving independent restaurants the tools to compete and win. From our award-winning point-of-sale to AI-powered profit tools, everything we do helps operators boost profit, work smarter, and keep their best people. And every solution is backed by real humans who actually give a sh*t about helping restaurants succeed. Named the #1 Restaurant POS by G2 (Fall 2025), based on ratings from real users Rated the top-rated point-of-sale (POS) for restaurants, bars, retail, and small businesses by Capterra users Awarded Great Places to Work and Built In’s Best Workplaces for multiple years running We move fast, care hard, and fight for independent restaurant operators to do what they love, and love doing it. If you’re looking to make an impact with heart and hustle, SpotOn is the place for you. As a Senior Software Engineer - Frontend on our Data and Reporting team, you'll own the merchant-facing reporting experience that helps restaurant operators understand their business. You'll build new visualizations, evolve existing reports, and shape how thousands of merchants engage with their data daily. This role offers significant autonomy—you'll make design and implementation decisions with real impact, and your judgment will be trusted to keep the product moving forward. On a daily basis you will: Design and build responsive, accessible reporting dashboards and data visualizations that help merchants make better business decisions. Develop new report types and chart visualizations, expanding beyond tabular data into richer visual formats. Improve and maintain existing reporting features, balancing new development with ongoing refinement. Collaborate with product managers, designers, and engineers to define requirements and deliver polished experiences—and make sound UX decisions when design resources aren't available. Work with backend engineers to integrate with Python APIs that power merchant reporting. Conduct code reviews and establish frontend standards that elevate the quality of the codebase. Mentor junior and mid-level engineers on frontend best practices and component architecture. What skills are we looking for? 5+ years of professional frontend development experience. Willing to come into our Kraków or Gdańsk office 2-3 times per week. Strong proficiency in React, with experience building and maintaining complex component architectures. Demonstrated experience with data visualization libraries (D3, Recharts, Victory, Chart.js, or similar) and translating data into clear, actionable visuals. Track record of building responsive web applications that work well across devices. Experience working with RESTful APIs and integrating frontend applications with backend services. Solid understanding of modern frontend tooling, testing practices, and performance optimization. Strong communication skills and the ability to collaborate effectively with cross-functional teams. Comfort with ambiguity and the judgment to make good product decisions independently. Perfect candidate also has: Experience building analytics dashboards or reporting interfaces. Familiarity with Python or backend development concepts. Background in the restaurant or hospitality technology sector. Experience mentoring other engineers or leading frontend architecture decisions. Here’s a bit about what we have to offer: Competitive pay: 19 500 - 24 400 PLN net on B2B. Training budget 3500 PLN gross per year. Access to e-learning platforms (O’Reilly). Fully paid private healthcare in LuxMed. Access to the Worksmile platform with a monthly top-up. Subsidized access to breakfast and lunch through the vending machine in Kraków office, and lunches in Gdańsk office once a week. Group English classes with a native speaker. New Macbook Pro, 4K monitors or whatever tools you need. Flexible working hours. New, modern, bright and comfortable office space in the city centre. Access to the company’s library. Great working atmosphere. Chill out room with a PlayStation and games. Free snacks and beverages in a kitchen. Company parties and social activities. Employee referral program. Relocation Package within Poland.

🏢 Summary: Backend Engineer role focused on designing, building, and maintaining scalable, high-performance backend systems supporting real-world transaction flows. The position involves end-to-end ownership of services, API design, and production reliability within a modern cloud-based infrastructure. The role requires strong Python expertise and experience with modern frameworks and cloud-native technologies. 🗂️ Requirements: 5–7 years of experience building production systems, Minimum 3 years of hands-on experience with Python, Proficiency in Python and at least one framework: Django, FastAPI, or Flask, Experience designing and building APIs, Experience with SQL and NoSQL databases, Ability to write efficient queries and optimize performance, Experience with AWS, Kubernetes, and Terraform, Knowledge of modern deployment and infrastructure practices, Experience working with AI tools in development workflow, English proficiency at minimum B2 level, Availability to work hybrid from Kraków or Gdańsk office 2–3 times per week 📃 Skills: Python, Django, FastAPI, Flask, API, SQL, NoSQL, AWS, Kubernetes, Terraform, AI 🏢 Description: We’re not just building restaurant tech—we’re giving independent restaurants the tools to compete and win. From our award-winning point-of-sale to AI-powered profit tools, everything we do helps operators boost profit, work smarter, and keep their best people. And every solution is backed by real humans who actually give a sh*t about helping restaurants succeed. Named the #1 Restaurant POS by G2 (Fall 2025), based on ratings from real users Rated the top-rated point-of-sale (POS) for restaurants, bars, retail, and small businesses by Capterra users Awarded Great Places to Work and Built In’s Best Workplaces for multiple years running We move fast, care hard, and fight for independent restaurant operators to do what they love, and love doing it. If you’re looking to make an impact with heart and hustle, SpotOn is the place for you. On a daily basis you will: Own backend systems end-to-end—from design and implementation to deployment and monitoring. Build, improve, and maintain services to support real-world transaction flows with a focus on reliability and performance. Design and evolve APIs, ensuring they are scalable, resilient, and easy to integrate with. Collaborate with engineers and stakeholders to define solutions, address system limitations, and make sound technical decisions. Identify and resolve performance bottlenecks, bugs, and edge cases in production environments. Participate in code reviews, mentor engineers, and raise the bar on code quality and best practices. Proactively identify technical debt and drive improvements before they become blockers. What skill are we looking for? You’ve spent 5–7 years building production systems, with at least 3 years working deeply in Python. You are willing to work in a hybrid setup, coming into our Kraków or Gdańsk office 2–3 times per week. You are highly proficient in Python and at least one modern framework (Django, FastAPI, or Flask), and you take ownership of what you build—from design through production. You have strong experience building and consuming APIs, and understand how systems communicate, fail, and scale in real-world environments. You are comfortable with both SQL and NoSQL databases, and can analyze data, write efficient queries, and reason about performance. You write clean, maintainable code and apply solid engineering principles and design patterns consistently. You use AI tools as part of your daily workflow to move faster, solve problems, and improve code quality. You are familiar with modern infrastructure and deployment practices, including AWS, Kubernetes, and Terraform, and understand how your code behaves in production. You have a solid command of English (min. B2) and are ready to collaborate in person at our Kraków or Gdańsk offices 2-3 times a week. Here’s a bit about what we have to offer: Competitive pay: 23 800 - 29 800 PLN net on B2B. Training budget 3500 PLN gross per year. Access to e-learning platforms (O’Reilly). Fully paid private healthcare in LuxMed. Access to the Worksmile platform with a monthly top-up. Subsidized access to breakfast and lunch through the vending machine in Kraków office, and lunches in Gdańsk office once a week. Group English classes with a native speaker. New Macbook Pro, 4K monitors or whatever tools you need. Flexible working hours. New, modern, bright and comfortable office space in the city centre. Access to the company’s library. Great working atmosphere. Chill out room with a PlayStation and games. Free snacks and beverages in a kitchen. Company parties and social activities. Employee referral program. Relocation Package within Poland. The controller of your personal data included in your job offer and others collected during the recruitment process is SpotOn Poland spółka z ograniczoną odpowiedzialnością with its registered office in Kraków, Aleja 29 listopada 20, 31-401 Kraków, e-mail address: poland-rodo@spoton.com . We will process your personal data for the purpose of current or, if you voluntarily agree, also future recruitment processes. More information about how we proccess your data, including the basis for processing and your rights in relation to the processing, can be found on our website: https://pl.spoton.com/privacy-and-cookies-policy . Administratorem podanych danych osobowych, w tym danych zawartych w dokumentach aplikacyjnych i zebranych w toku procesu rekrutacji, jest SpotOn Poland Sp. z o.o. z siedzibą w Krakowie (ul. Aleja 29 listopada 20, 31-401 Kraków; adres e-mail do kontaktu: poland-rodo@spoton.com . Dane osobowe będą przetwarzane w celu realizacji obecnych lub – jeżeli wyrazisz na to dobrowolną zgodę – także przyszłych procesów rekrutacji. Więcej informacji o tym, jak przetwarzamy Twoje dane, w tym także informacje o podstawach prawnych przetwarzania oraz o prawach przysługujących Ci w związku z przetwarzaniem danych, znajdziesz na stronie: https://pl.spoton.com/privacy-and-cookies-policy .

🏢 Summary: The offer is for a QA Engineer responsible for ensuring the quality of web and mobile restaurant technology products through comprehensive testing, quality planning, and cross-team collaboration. The role focuses on identifying defects, improving QA processes, and supporting product improvements in a fast-paced environment. It combines manual testing, API validation, and exposure to test automation tools. 🗂️ Requirements: 2+ years experience as QA Engineer, Experience writing test cases, Experience with test case management tools, Experience with bug tracking tools, Experience testing web and mobile applications, API testing experience, Knowledge of proxy or monitoring tools, Understanding of automated testing tools, Proficiency with Windows or Mac OS, English proficiency minimum B2 level, Availability to work from office 2-3 times per week 📃 Skills: TestRail, Jira, Postman, Charles, Grafana, Firebase, Kotlin, Espresso, Windows, MacOS, API, QA, Testing 🏢 Description: We’re not just building restaurant tech, we’re giving independent restaurants the tools to compete and win. From our award-winning point-of-sale to AI-powered profit tools, everything we do helps operators boost profit, work smarter, and keep their best people. And every solution is backed by real humans who actually give a sh*t about helping restaurants succeed. Named the #1 Restaurant POS by G2 (Fall 2025), based on ratings from real users Rated the top-rated point-of-sale (POS) for restaurants, bars, retail, and small businesses by Capterra users Awarded Great Places to Work and Built In’s Best Workplaces for multiple years running We move fast, care hard, and fight for independent restaurant operators to do what they love, and love doing it. If you’re looking to make an impact with heart and hustle, SpotOn is the place for you. On a daily basis you will: Test current products and identify deficiencies. Effectively review requirements, design documents, and acceptance criteria to create complete comprehensive test plans. Suggest solutions to identified product problems . Investigate product quality in order to make improvements to achieve better customer satisfaction. Plan, create, and manage the overall Quality Planning strategy. Collaborate with the Product and Development teams to ensure consistent project execution. Identify quality assurance process bottlenecks and suggest actions for improvement. Must have a "willing to learn" attitude and be flexible to adapt in a fast paced environment. Must be able to work on multiple tasks at a time with the ability to manage their own time and priorities effectively. What skill are we searching for? 2+ years of experience as a QA Engineer. Willing to come into our Kraków or Gdańsk office 2-3 times per week. Attention to detail across platforms ranging from web to native mobile apps. Experience with writing test cases and using test case management software, such as TestRail. Experience with using bug tracking tool, such as Jira. Proficient with Windows or Mac OS. Excellent command of written and spoken English (min. B2 level). Perfect candidate also has: Experience testing APIs (Postman). Experience with proxy tools, such as Charles. Experience with monitoring tools like Grafana, Firebase. Experience with automated testing tools, such as Kotlin automation in Espresso. Experience in Banking/Financial, Retail, or Restaurant domains is preferable. Here’s a bit about what we have to offer: Competitive pay: 9300 - 11 700 PLN net on B2B. Training budget 3500 PLN gross per year. Access to e-learning platforms (O’Reilly). Fully paid private healthcare in LuxMed. Access to the Worksmile platform with a monthly top-up. Subsidized access to breakfast and lunch through the vending machine in Kraków office, and lunches in Gdańsk office once a week. Group English classes with a native speaker. New Macbook Pro, 4K monitors or whatever tools you need. Flexible working hours. New, modern, bright and comfortable office space in the city centre. Access to the company’s library. Great working atmosphere. Chill out room with a PlayStation and games. Free snacks and beverages in a kitchen. Company parties and social activities. Employee referral program. Relocation Package within Poland. The controller of your personal data included in your job offer and others collected during the recruitment process is SpotOn Poland spółka z ograniczoną odpowiedzialnością with its registered office in Kraków, Aleja 29 listopada 20, 31-401 Kraków, e-mail address: poland-rodo@spoton.com . We will process your personal data for the purpose of current or, if you voluntarily agree, also future recruitment processes. More information about how we proccess your data, including the basis for processing and your rights in relation to the processing, can be found on our website: https://pl.spoton.com/privacy-and-cookies-policy . Administratorem podanych danych osobowych, w tym danych zawartych w dokumentach aplikacyjnych i zebranych w toku procesu rekrutacji, jest SpotOn Poland Sp. z o.o. z siedzibą w Krakowie (ul. Aleja 29 listopada 20, 31-401 Kraków; adres e-mail do kontaktu: poland-rodo@spoton.com . Dane osobowe będą przetwarzane w celu realizacji obecnych lub – jeżeli wyrazisz na to dobrowolną zgodę – także przyszłych procesów rekrutacji. Więcej informacji o tym, jak przetwarzamy Twoje dane, w tym także informacje o podstawach prawnych przetwarzania oraz o prawach przysługujących Ci w związku z przetwarzaniem danych, znajdziesz na stronie: https://pl.spoton.com/privacy-and-cookies-policy . We will never ask candidates to pay fees, purchase equipment, or share sensitive personal or financial information during the hiring process. All legitimate communication from our recruiting team will come from an official company email address (@ spoton.com ). If something seems suspicious, please contact us at careers@spoton.com . SpotOn is an equal employment opportunity employer. Qualified candidates are considered for employment without regard to race, religion, gender, gender identity, sexual orientation, national origin, age, military or veteran status, disability, or any other characteristic protected by applicable law. SpotOn is an E-Verify company.

🏢 Summary: Senior or Staff Backend Engineer role focused on architecting and scaling AI-native backend systems for a modern accounting platform. The position involves designing distributed services, building high-performance APIs, and establishing engineering standards to support rapid, reliable product delivery. You will work closely with Product, AI, and Operations teams to develop agentic systems and scalable data pipelines. 🗂️ Requirements: 5–10+ years of backend engineering experience, Proven experience designing, building, and operating production backend systems at scale, Strong expertise in API design, Strong expertise in data modelling, Deep understanding of distributed systems trade-offs, Hands-on experience with AWS or GCP in production, Practical experience with CI/CD in high-frequency deployment environments, Experience implementing testing and deployment strategies, Strong knowledge of observability practices, Experience participating in on-call rotations 📃 Skills: TypeScript, Node.js, React, AWS, GCP, Terraform, PostgreSQL, OpenAI, Azure, CI/CD, APIs, DistributedSystems 🏢 Description: ABOUT THE ROLE We're looking for a Senior or Staff Backend Engineer to own and evolve our backend services as we scale. This is a broad, high-impact role — you'll architect new features, build the systems that underpin our core product, and set the engineering standards that shape how the whole team works. The focus is on building a modern, AI-native developer experience. That means working closely with Product, AI, and Operations teams to design agentic systems, distributed data pipelines, and scalable incident response infrastructure — and doing it in a way that lets the team ship with confidence multiple times a day. WHAT YOU'LL WORK ON Architecture and feature design Partner with Product, AI, and Operations teams to architect new features and complex agentic systems. Make clear architectural trade-offs that balance platform, product, and business goals. Backend services and APIs Build and maintain the backend services and APIs that power the core product. Ensure systems are secure, well-tested, and high performance. Distributed systems Design and implement distributed services to orchestrate data pipelines, automate investigations, and enable incident response at scale. Operational excellence Own operational best practices so the team can ship multiple times a day with confidence. Healthy on-call culture and strong observability are part of what you'll build and maintain. Engineering standards Set the bar for writing, communication, and system design across the team. Your influence will shape how a modern AI-native product is built. WHAT WE LOOK FOR 5–10+ years of backend engineering experience A strong track record designing, building, and operating production backend systems at scale. Deep backend fundamentals Expertise in API design, data modelling, and reasoning about distributed systems trade-offs. You understand the nuances, not just the patterns. AWS or GCP hands-on experience Solid understanding of how infrastructure decisions impact application reliability and performance. You've run things in production, not just designed them. CI/CD in practice Practical experience with testing and deployment strategies in high-frequency shipping environments. Observability and on-call maturity A solid grasp of what good observability looks like and how to build healthy on-call practices that don't burn people out. Bonus Experience at an early-stage or scaling startup. Exposure to modern AI and ML systems. Experience shipping product without a dedicated product manager. TECH STACK TypeScript, React, Node.js, AWS, Terraform, PostgreSQL, OpenAI, Azure AI. The team uses GitHub, Slack, Linear, Figma, and Notion day to day. THE TEAM Small, senior, and in-person. The office is in central Wrocław, next to the main train station. The expectation is 4–5 days a week in the office. Relocation support is available for the right candidate. COMPENSATION & BENEFITS Salary $130,000 – $190,000 USD depending on experience, plus competitive equity. Wellness and commute stipend $100 per month. Hardware Premium hardware provided — MacBook Pro and AirPods. Food Daily in-office lunch and dinner. Time off 20 PTO days plus 9 US public holidays. Relocation Support available for candidates relocating to Wrocław.

🏢 Summary: Senior or Staff Backend Engineer role focused on architecting and scaling AI-native backend services for a modern accounting platform. The position involves designing distributed systems, building secure and high-performance APIs, and establishing engineering standards to support rapid, reliable product delivery. You will work closely with Product, AI, and Operations teams to build scalable data pipelines and incident response infrastructure. 🗂️ Requirements: 5–10+ years of backend engineering experience, Proven experience designing and operating production backend systems at scale, Strong expertise in API design and data modelling, Deep understanding of distributed systems and architectural trade-offs, Hands-on experience with AWS or GCP in production environments, Practical experience with CI/CD pipelines and automated testing, Experience building and maintaining observability and on-call practices 📃 Skills: TypeScript, Node.js, React, AWS, GCP, Terraform, PostgreSQL, OpenAI, Azure, CI/CD, APIs, DistributedSystems, DataModelling, Observability 🏢 Description: ABOUT THE COMPANY We're an applied AI company building an AI-native alternative to legacy accounting software — a market worth tens of billions in annual recurring revenue. Our mission is to help entrepreneurs focus on what matters in their business and life, and to help their accountants become more strategic. We've raised $20M from a group of top-tier investors and have grown ARR 60% month-on-month since our public launch. We now serve thousands of businesses and are expanding our product to serve accountants directly — creating a two-sided platform where both business owners and their accountants use and recommend us. We're at an early but proven stage, moving fast, and building a world-class engineering team in Wrocław to match our ambition. ABOUT THE ROLE We're looking for a Senior or Staff Backend Engineer to own and evolve our backend services as we scale. This is a broad, high-impact role — you'll architect new features, build the systems that underpin our core product, and set the engineering standards that shape how the whole team works. The focus is on building a modern, AI-native developer experience. That means working closely with Product, AI, and Operations teams to design agentic systems, distributed data pipelines, and scalable incident response infrastructure — and doing it in a way that lets the team ship with confidence multiple times a day. WHAT YOU'LL WORK ON Architecture and feature design Partner with Product, AI, and Operations teams to architect new features and complex agentic systems. Make clear architectural trade-offs that balance platform, product, and business goals. Backend services and APIs Build and maintain the backend services and APIs that power the core product. Ensure systems are secure, well-tested, and high performance. Distributed systems Design and implement distributed services to orchestrate data pipelines, automate investigations, and enable incident response at scale. Operational excellence Own operational best practices so the team can ship multiple times a day with confidence. Healthy on-call culture and strong observability are part of what you'll build and maintain. Engineering standards Set the bar for writing, communication, and system design across the team. Your influence will shape how a modern AI-native product is built. WHAT WE LOOK FOR 5–10+ years of backend engineering experience A strong track record designing, building, and operating production backend systems at scale. Deep backend fundamentals Expertise in API design, data modelling, and reasoning about distributed systems trade-offs. You understand the nuances, not just the patterns. AWS or GCP hands-on experience Solid understanding of how infrastructure decisions impact application reliability and performance. You've run things in production, not just designed them. CI/CD in practice Practical experience with testing and deployment strategies in high-frequency shipping environments. Observability and on-call maturity A solid grasp of what good observability looks like and how to build healthy on-call practices that don't burn people out. Bonus Experience at an early-stage or scaling startup. Exposure to modern AI and ML systems. Experience shipping product without a dedicated product manager. TECH STACK TypeScript, React, Node.js, AWS, Terraform, PostgreSQL, OpenAI, Azure AI. The team uses GitHub, Slack, Linear, Figma, and Notion day to day. THE TEAM Small, senior, and in-person. The office is in central Wrocław, next to the main train station. The expectation is 4–5 days a week in the office — this is a deliberate choice, not a compromise. Relocation support is available for the right candidate. COMPENSATION & BENEFITS Salary $130,000 – $190,000 USD depending on experience, plus competitive equity. Wellness and commute stipend $100 per month. Hardware Premium hardware provided — MacBook Pro and AirPods. Food Daily in-office lunch and dinner. Time off 20 PTO days plus 9 US public holidays. Relocation Support available for candidates relocating to Wrocław.

🏢 Summary: Senior Android Developer role focused on building and scaling a Kotlin-based POS mobile application within a SuperApp, contributing to a Kotlin Multiplatform strategy across Android and iOS. The position involves developing new features, improving app architecture, and ensuring high-quality, scalable solutions used globally. The role requires strong expertise in Android development, modern architectures, and testing practices. 🗂️ Requirements: 8+ years of experience in Android mobile development, Strong proficiency in Kotlin, Minimum 2 years of experience with Jetpack Compose, Experience with Kotlin Multiplatform, Knowledge of software design patterns (MVVM or MVI), Experience building modular and scalable app architectures, Experience with reactive programming using Flow and Coroutines, Strong knowledge of testing best practices and writing automated tests 📃 Skills: Kotlin, Android, Jetpack, Compose, KMP, MVVM, MVI, Flow, Coroutines, Concurrency, Testing 🏢 Description: About the team SumUp’s Point-of-Sale (POS) solution empowers cafes, shops, bars, hair salons, and other businesses to operate efficiently and grow. It offers a wide range of features, including product catalogs, inventory management, business analytics, compliance support, and loyalty tools. Our POS solution integrates seamlessly into the SumUp SuperApp, which supports both our proprietary register hardware and mobile devices like tablets and phones. As a Senior Android Developer , you’ll collaborate with a dynamic, cross-functional team of Product Managers, Product Designers, Engineering Managers, and fellow engineers. About the role We’re evolving toward a Kotlin Multiplatform (KMP) strategy, enabling shared development across Android and iOS. In this role, you’ll learn, refine, and help implement this technology, shaping the future of our mobile apps. You’re a developer who values user-centric design, precision, and seamless collaboration. You bring structure to communication and thrive in a cross-functional environment. This role will be a B2B based role in Warsaw. What you’ll do Build new features for the item catalog within the SumUp SuperApp Help improve the architecture of the application and contribute to our Kotlin Multiplatform strategy Enhance and maintain our unified android app, distributed across 60+ countries, ensuring high-quality, scalable solutions Shape the product’s evolution by identifying opportunities for improvement and contributing to daily decision-making Write thorough documentation and implement robust testing for features before shipping Collaborate closely with Designer, Product Manager and Android engineers to deliver a unified UX experience across platforms You’ll thrive in this role if: You have 8** + years experience in mobile engineering with Android and Kotlin.** You have 2+ years of experience working with Jetpack Compose. You have a solid understanding of software design patterns (e.g., MVVM, MVI) and expertise in building modular, scalable app architectures. You have good knowledge of reactive programming (Flow, Coroutines and Concurrency). You have a strong grasp of testing best practices: knowing what to test, why, and how to write resilient tests. You strive for clean code, and you are flexible to balance pragmatism and perfection. You have a keen interest in multi-platform development using Kotlin Multiplatform. Why You Should Join SumUp (Warsaw) 🇵🇱 🌎 Opportunity to work , from our vibrant Warsaw office with inspiring art-filled lounges and a skyline terrace in the Mennica Legacy Tower. 🌈 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 🚀 Enrolment onto our VSOP program: you will own a stake in SumUp’s future success 🚴 Fitness support: work out on-site at our gym or explore the city using the Multisport Card, subsidised by SumUp for access to sports facilities across Warsaw 🩺 Commitment to well-being: access health insurance coverage for you and your family, plus life insurance to further protect your peace of mind 💰 PPK (Employee Capital Plan): grow your savings with joint contributions from SumUp and the State. 🏖️ Generous time off: enjoy 26 days of paid leave plus public holidays and special leave days 🌴 Break4me: 1-month sabbatical after 3 years of service 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team 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.

🏢 Summary: Senior Data Platform Engineer role focused on designing, building, and operating scalable, highly available data persistence systems for distributed services. The position combines backend engineering, cloud-native infrastructure, and data platform reliability to improve performance and scalability of global data systems. It is a hands-on role working with large-scale data pipelines, streaming, and cloud environments. 🗂️ Requirements: 5+ years of software engineering experience in production systems, Strong backend programming skills in Python, Java, or Kotlin, Experience with large-scale, data-intensive systems, Solid understanding of distributed systems fundamentals, Experience with cloud environments, preferably AWS, Experience with relational or NoSQL databases, Hands-on experience with large-scale data pipelines, Experience with event-driven architectures or streaming systems, Understanding of end-to-end data flow and data modeling, Experience designing scalable and reliable data systems, Experience with infrastructure automation tools 📃 Skills: Python, Java, Kotlin, Kafka, Spark, PostgreSQL, MySQL, DynamoDB, Redis, Elasticsearch, AWS, Terraform, ETL 🏢 Description: We are hiring on behalf of our client, a global innovator in fitness and wellness technology. Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere. We are looking for a Senior Data Platform Engineer to join the Datastores team. This team is responsible for building and operating the core data persistence layer used by application services across the organization. In this role, you will design and improve the systems that store, access, and scale critical data across distributed services. It is a hands-on engineering position where you will work at the intersection of backend engineering, platform reliability, and cloud-native data infrastructure. Your work will directly influence the scalability, performance, and reliability of the company’s global data ecosystem. Key takeaways: Stack: Python, Kafka, Spark, PostgreSQL, AWS Salary: 23.000 - 30 000 PLN gross per month on Employment Contract Working model: hybrid - 3x weekly from the office Location: ul. Grzybowska 60, Warsaw Recruitment process: A call with Motife recruiter (30 min) Coding Interview (1h) Interview panel: architecture & system design discussion; Hiring Manager meeting (up to 2h in total) Responsibilities: Data Infrastructure Engineering Design, build, and operate backend systems that rely on scalable and highly available data persistence layers. Contribute to architectural decisions around distributed data systems, multi-region persistence, and global scalability. Improve the reliability and performance of production datastores used by critical services. Data Performance & Optimization Partner with service teams to improve database schema design, query performance, and data modelling. Optimize data access patterns and indexing strategies for relational and NoSQL databases. Support teams in designing systems that scale efficiently under high load. Developer Experience & Platform Tooling Build and maintain self-service tooling that enables engineers to provision and manage databases and caching layers. Contribute to infrastructure automation using tools such as Terraform and internal developer platforms. Improve observability and operational insight into datastore performance and reliability. Platform Reliability & Observability Implement monitoring, metrics, and tracing strategies to improve visibility into production data systems. Develop autoscaling and performance optimization strategies for critical data infrastructure. Support operational excellence by reducing manual processes and improving system resilience. Requirements: Technical Expertise 5+ years of experience in software engineering, building and operating production systems Strong backend engineering fundamentals (e.g. Python, Java, or Kotlin) Experience working with large-scale, data-intensive systems Solid understanding of distributed systems fundamentals (e.g. scalability, latency, reliability, data consistency) Experience working in cloud environments (preferably AWS) Familiarity with relational or NoSQL databases (e.g. PostgreSQL, MySQL, DynamoDB, Redis, Elasticsearch) Data Systems & Architecture Hands-on experience with large-scale data pipelines and data processing systems Exposure to event-driven architectures, streaming or batch processing (e.g. Kafka, Spark, ETL workflows) Understanding of end-to-end data flow: ingestion (how data enters the system) transformation (how it is processed) storage & access (how other services consume it) Experience designing systems where data performance, scalability, and reliability are critical Collaboration & Engineering Mindset Ability to work cross-functionally with service teams to improve system design and data access patterns. Strong problem-solving skills with a focus on performance, scalability, and reliability. Clear communication skills and a collaborative engineering approach. What we offer: 100% paid medical care Multisport Creative tax (KUP) Home office allowance MacBook Pro Apply now If you’re excited about building developer platforms that scale, empower teams, and set new standards for engineering excellence, we’d love to hear from you. Apply via our careers page and please submit your CV in English .

🏢 Summary: Senior Data Platform Engineer role focused on designing, building, and operating scalable, highly available data persistence systems for distributed services. The position combines backend engineering, cloud-native infrastructure, and data platform reliability to support global, data-intensive applications. The engineer will enhance performance, scalability, and observability of production datastores across a multi-region environment. 🗂️ Requirements: 5+ years of software engineering experience in production systems, Strong backend programming skills (Python, Java, or Kotlin), Experience with large-scale, data-intensive systems, Solid understanding of distributed systems fundamentals, Experience with cloud environments, preferably AWS, Hands-on experience with relational or NoSQL databases, Experience with large-scale data pipelines and data processing systems, Experience with event-driven architectures or streaming/batch processing, Understanding of end-to-end data flow (ingestion, transformation, storage, access), Experience designing scalable, high-performance, reliable data systems 📃 Skills: Python, Java, Kotlin, Kafka, Spark, PostgreSQL, MySQL, DynamoDB, Redis, Elasticsearch, AWS, Terraform, ETL 🏢 Description: We are hiring on behalf of our client, a global innovator in fitness and wellness technology. Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere. We are looking for a Senior Data Platform Engineer to join the Datastores team. This team is responsible for building and operating the core data persistence layer used by application services across the organization. In this role, you will design and improve the systems that store, access, and scale critical data across distributed services. It is a hands-on engineering position where you will work at the intersection of backend engineering, platform reliability, and cloud-native data infrastructure. Your work will directly influence the scalability, performance, and reliability of the company’s global data ecosystem. Key takeaways: Stack: Python, Kafka, Spark, PostgreSQL, AWS Salary: 23.000 - 30 000 PLN gross per month on Employment Contract Working model: hybrid - 3x weekly from the office Location: ul. Grzybowska 60, Warsaw Recruitment process: A call with Motife recruiter (30 min) Coding Interview (1h) Interview panel: architecture & system design discussion; Hiring Manager meeting (up to 2h in total) Responsibilities: Data Infrastructure Engineering Design, build, and operate backend systems that rely on scalable and highly available data persistence layers. Contribute to architectural decisions around distributed data systems, multi-region persistence, and global scalability. Improve the reliability and performance of production datastores used by critical services. Data Performance & Optimization Partner with service teams to improve database schema design, query performance, and data modelling. Optimize data access patterns and indexing strategies for relational and NoSQL databases. Support teams in designing systems that scale efficiently under high load. Developer Experience & Platform Tooling Build and maintain self-service tooling that enables engineers to provision and manage databases and caching layers. Contribute to infrastructure automation using tools such as Terraform and internal developer platforms. Improve observability and operational insight into datastore performance and reliability. Platform Reliability & Observability Implement monitoring, metrics, and tracing strategies to improve visibility into production data systems. Develop autoscaling and performance optimization strategies for critical data infrastructure. Support operational excellence by reducing manual processes and improving system resilience. Requirements: Technical Expertise 5+ years of experience in software engineering, building and operating production systems Strong backend engineering fundamentals (e.g. Python, Java, or Kotlin) Experience working with large-scale, data-intensive systems Solid understanding of distributed systems fundamentals (e.g. scalability, latency, reliability, data consistency) Experience working in cloud environments (preferably AWS) Familiarity with relational or NoSQL databases (e.g. PostgreSQL, MySQL, DynamoDB, Redis, Elasticsearch) Data Systems & Architecture Hands-on experience with large-scale data pipelines and data processing systems Exposure to event-driven architectures, streaming or batch processing (e.g. Kafka, Spark, ETL workflows) Understanding of end-to-end data flow: ingestion (how data enters the system) transformation (how it is processed) storage & access (how other services consume it) Experience designing systems where data performance, scalability, and reliability are critical Collaboration & Engineering Mindset Ability to work cross-functionally with service teams to improve system design and data access patterns. Strong problem-solving skills with a focus on performance, scalability, and reliability. Clear communication skills and a collaborative engineering approach. What we offer: 100% paid medical care Multisport Creative tax (KUP) Home office allowance MacBook Pro Apply now If you’re excited about building developer platforms that scale, empower teams, and set new standards for engineering excellence, we’d love to hear from you. Apply via our careers page and please submit your CV in English .

🏢 Summary: Senior Backend Engineer role focused on building secure backend systems to ensure fiscal compliance of POS products across multiple European markets. The position involves designing and implementing integrations for receipt fiscalization and regulatory reporting within a distributed, cross-functional environment. The role supports international expansion by developing scalable, fault-tolerant backend solutions. 🗂️ Requirements: 5+ years of backend engineering experience, Strong proficiency in Java and/or Kotlin, Solid understanding of system architecture and design principles, Experience with data modeling and API design, Experience building distributed and fault-tolerant systems, Hands-on experience with AWS, Hands-on experience with Kubernetes, Knowledge of Kafka, Knowledge of Postgres, Understanding of CQRS 📃 Skills: Java, Kotlin, AWS, Kubernetes, Kafka, Postgres, CQRS, APIs, Microservices, DistributedSystems 🏢 Description: About the team SumUp’s Point-of-Sale (POS) solution empowers cafes, shops, bars, hair salons, and other businesses to operate efficiently and grow. It offers a wide range of features, including product catalogs, inventory management, business analytics, compliance support, and loyalty tools. Our Fiscalization team will accelerate making the following countries fiscally compliant: Italy, Sweden, Norway, Belgium, Austria, and many other European countries. They will also start building the path for integrating with third parties and fiscalizing receipts. As a Senior Backend Engineer , you’ll collaborate with a dynamic, cross-functional team of Product Managers, Product Designers, Engineering Managers, and fellow engineers. About the role You will be working on secure backend systems to ensure our SumUp’s Point of Sale (POS) products are compliant in the different countries in our roadmap. Furthermore, you will work with the Fiscalization squad to understand the challenge in each market to design a unique solution to delivery. You’re a developer who values user-centric design, precision, and seamless collaboration. You bring structure to communication and thrive in a cross-functional environment. This will be B2B role for our team in Warsaw. What you’ll do Build and maintain fiscal compliance solutions to enable SumUp's expansion across Italy, Sweden, Norway, Belgium, Austria, and other European markets. Develop integrations with third-party services for receipt fiscalization and regulatory reporting systems. Navigate SumUp's complex POS ecosystem and master fiscalization frameworks across multiple jurisdictions. Collaborate with distributed squad members and stakeholders across 5+ cities in a hybrid environment. You’ll thrive in this role if: You have 5+ years experience in backend engineering with Java and/or Kotlin. You have a strong understanding of fundamental system architecture, design principles, data modeling, and API design. You have a strong experience with distributed and fault-tolerant systems. You have user-level experience working with AWS and Kubernetes. You have good knowledge of Kafka, Postgres, & CQRS. Why You Should Join SumUp (Warsaw) 🇵🇱 🌈 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 🚀 Enrolment onto our VSOP program: you will own a stake in SumUp’s future success 🚴 Fitness support: work out on-site at our gym or explore the city using the Multisport Card, subsidised by SumUp for access to sports facilities across Warsaw 🩺 Commitment to well-being: access health insurance coverage for you and your family, plus life insurance to further protect your peace of mind 💰 PPK (Employee Capital Plan): grow your savings with joint contributions from SumUp and the State. 🏖️ Generous time off: enjoy 26 days of paid leave plus public holidays and special leave days 🌴 Break4me: 1-month sabbatical after 3 years of service 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team 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.

🏢 Summary: Senior Fullstack Engineer role focused on building and scaling an AI-powered drive-thru platform for a QSR client. The position involves developing integrations with POS systems and digital menu boards, building data pipelines, and leading end-to-end integration projects in production environments. The engineer will also troubleshoot complex issues and drive technical delivery in a cloud-based ecosystem. 🗂️ Requirements: 7+ years experience in Python and JavaScript, Strong backend development skills, Strong software architecture skills, Experience delivering and deploying production projects, Proficiency with Async IO, Experience with React and Redux (RTK), Experience with CI/CD pipelines, Experience with cloud platforms (AWS/GCP/Azure), Experience with Linux environments, Experience with Docker and Kubernetes, Experience with 3rd party API integrations, Experience building Data Pipelines and ETL processes, BSc in Software Development or equivalent experience, 1+ year of technical leadership experience 📃 Skills: Python, JavaScript, React, Redux, CSS, AsyncIO, CI/CD, AWS, GCP, Azure, Linux, Docker, Kubernetes, APIs, ETL, SQL 🏢 Description: Join a QSR client as a Senior Fullstack Engineer and help develop an AI drive-thru platform that scales faster, smarter, and more accurately. RESPONSIBILITIES In this role, you will: Integrate with new POS systems and digital menu boards Build data pipelines to process restaurant menus Support existing integrations and pipelines Debug and solve complex customer issues Lead communication with integration partners to deliver the integrations Estimate, plan and deliver the integration projects Handle a large set of complex and diverse customer issues Create documentation for integrations REQUIREMENTS 7+ years experience in Python and JavaScript Strong backend development and software architecture skills Experience in developing and deploying multiple projects used in production Proficient with Async IO Experience with React, Redux (RTK), CSS modules Experience with CI/CD, Clouds (AWS/GCP/Azure), Linux, Docker, Kubernetes, 3rd Party API integrations Experience with Data Pipelines, ETL Prior experience working in startups BSc in Software Development or equivalent industry experience 1+ years of experience in technical leadership WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract. 100% remote work. The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client. Events and integration meetings, as well as participation in various initiatives, e.g., sports. Access to the benefits offering (medical care, life insurance, Multisport card). WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE? Application: Apply and submit your CV. After the application review, the recruiter will contact selected candidates by phone. Screening: Have a conversation with a speedapp recruiter about your experience. Next steps: The speedapp recruiter will explain the recruitment process for the specific position. The speedapp recruiter will stay in touch with you throughout the entire process. ABOUT SPEEDAPP At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch. DO YOU HAVE ANY QUESTIONS? Contact the recruiter responsible for this process directly. Barbara Krawczyk Junior IT Delivery Consultant barbara.krawczyk@speedapp.pl +48 734 469 838