Senior Backend Engineer - Spark team

Sumup

Salary range: 18 850 - 29 660 PLN per month   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.  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  🏖️ 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   *Disclaimer The stated salary range represents the expected compensation for candidates who meet the core requirements of this role. Offers above this range may be considered in exceptional circumstances, subject to internal review and approval, where a candidate's qualifications, skills, or experience significantly exceed the role's standard expectations.   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.

Nexos

Join the AI revolution. We’re building an all-in-one AI platform to help teams do their best work and automate every routine task you can think of. We’re looking for problem-solvers to turn powerful AI into an easy, no-code tool for teams everywhere.

Asana

We're looking for a Senior Infrastructure Engineer who brings strong software engineering skills and a deep understanding of production systems. This role is a good fit for someone who enjoys building systems that make infrastructure more scalable, reliable, and easy to operate – using code, not runbooks. You'll work with a highly collaborative team to design and build the internal platforms that power all of Asana, from product features to AI systems to offline analytics. Our tech stack includes: AWS, Kubernetes (EKS), MySQL (RDS), OpenSearch, DynamoDB, Redis, Terraform, Datadog, TypeScript, Scala, Go, and Python. We’re especially interested in people who think like backend engineers but care deeply about systems – things like failure modes, operational cost, debuggability, and performance. This role is based in our Warsaw office with an office-centric hybrid schedule. The standard in-office days are Monday, Tuesday, and Thursday. Most Asanas have the option to work from home on Wednesdays. Working from home on Fridays depends on the type of work you do, and your recruiter can share more about the in-office requirements. We offer a Contract of Employment (UoP) for our employees in Poland. What you’ll achieve: * Design and build frameworks, tools, and services that improve the reliability, observability, and scalability of Asana’s infrastructure. * Lead end-to-end projects, from scoping and design through to rollout, across multiple systems and teams. * Improve the operability of stateful infrastructure like MySQL, OpenSearch, and DynamoDB – and help drive Asana’s long-term vision for storage reliability. * Debug production issues across the stack. Yes, there’s an on-call rotation – but this isn’t a pager monkey role. You’re here to fix things properly and make sure they don’t break again. * Partner with product teams to shape a service-oriented architecture that enables fast, reliable development. * Share knowledge through code reviews, design discussions, and mentorship. About you: * Strong software engineering background – you’re comfortable writing production code and designing systems (we use Go, Python, Scala, TypeScript). * 7+ years of experience building and operating backend systems at scale. * Familiarity with distributed systems and storage technologies (SQL, NoSQL, Search), especially in cloud environments. * Experience with AWS services (e.g. RDS, EKS, IAM), Terraform, and monitoring tooling like Datadog or similar. * Solid understanding of SRE principles (e.g. SLIs/SLOs, error budgets, incident response), but you approach reliability as a software problem first. * Clear communicator and strong collaborator – you're comfortable navigating trade-offs with stakeholders across the stack. * Important: If you’re only comfortable with scripting, this isn’t the right role. We’re looking for engineers who build and ship real systems. * Demonstrates curiosity about AI tools and emerging technologies, with a willingness to learn and leverage them to enhance productivity, collaboration, or decision-making Why this role? * Founding team: You’ll be one of the first SREs in Warsaw – and a key player in a growing team. * Drive real change: This isn’t a role where you’ll just patch up legacy systems. We are expecting (and supporting) real architectural changes to improve reliability, scalability, and long-term operability. * Big impact: Our product is scaling fast, and reliability is a top company priority. * Room to grow: As this team grows, so will your influence – whether you want to lead projects, mentor others, or help shape how we scale. * Global collaboration: Work closely with experienced engineers in San Francisco, Reykjavik, and Warsaw, while helping build the future of SRE at Asana. What we'll offer: * Generous, transparent and fair compensation system (base salary and generous Restricted Stock Unit for Asana Inc.). * Contract of Employment (with 50% tax deductible costs for author’s rights usage for Engineers). * Health insurance with dental and travel coverage (Lux Med). * Lunch catering on the days that you work from the office. * Career growth budget. * Home office setup budget. * Gym/Fitness reimbursement. * Fertility healthcare and family-forming support with Carrot. * Mental health support in Modern Health. * Group life insurance. * MacBooks with all necessary accessories. For this role, the estimated base salary range is between 31,000 - 36,000 PLN gross monthly on the contract of employment (UoP). The actual base salary will vary based on various factors and individual qualifications objectively assessed during the interview process. The listed range above is a guideline, and the base compensation range for this role may be modified. Our total compensation consists of base salary and equity (RSUs). #LI-Hybrid #LI-AZ About us Asana is a leading platform for human + AI collaboration. Millions of teams around the world rely on Asana to achieve their most important goals, faster. Asana has been named to Fortune's Best Workplaces for 7+ years and recognized by Fast Company, Forbes, and Gartner for excellence in workplace culture and innovation. We offer an exceptional office-centric culture while adopting the best elements of hybrid models to ensure that every one of our global team members can work together effortlessly. With 13+ offices all over the world, we are always looking for individuals who care about building technology that drives positive change in the world and a culture where everyone feels that they belong. Join Asana’s Talent Network to stay up to date on job opportunities and life at Asana.