Backend Quality Assurance Engineer

Location: Copenhagen, Denmark Team and Mission SumUp’s Global Bank tribe develops financial tools that help small businesses manage their finances. The team focuses on two main products: Expenses and Making Tax Digital (MTD). These products are central to SumUp’s accounting and compliance platform. The current priority is launching MTD in the UK, making it possible for merchants to submit Income Tax assessments electronically. The long-term plan is to expand the suite to include Income Tax, VAT submissions, and financial reporting across different markets. Role Overview This Fullstack Engineer role is part of the Expenses and MTD squad. It offers the chance to influence early-stage product direction and make a visible impact. The work supports SumUp’s goal of delivering a complete accounting solution for small businesses in the UK and other regions. What You Will Do Deliver features end to end, working across both frontend and backend systems Collaborate with two senior engineers, a Product Manager, a Designer, and an Engineering Manager Work alongside a global network of 200 professionals, ensuring broad impact Collaboration and Support The squad brings together experienced engineers, product experts, and design colleagues. While the team operates with autonomy, it benefits from the resources and support of SumUp’s global organization.

SumUp is hiring a Fullstack Backend Engineer with expertise in Node.js for its Copenhagen office. The role centers on developing and maintaining backend systems that power payment processing services. Collaboration with colleagues from various backgrounds is a regular part of the work, ensuring that backend solutions align with the needs of digital payment products. Key responsibilities Design and build backend features using Node.js Partner with cross-functional teams to deliver new capabilities for digital payments Help create dependable applications for SumUp’s payment platform Location This role is located in Copenhagen, Denmark.

Managing spend can often be a complex and frustrating task. At Pleo, we are revolutionizing this process. We develop innovative spend management solutions that empower finance teams and employees, making financial operations smooth and surprisingly effective. Our mission is to help businesses achieve more than they thought possible.The name ‘Pleo’ translates to ‘more than you’d expect’, and this philosophy has guided us to success over the past decade.As we embark on this exciting journey, every decision we make affects our 40,000+ customers and contributes to our collective success. We seek passionate individuals who excel at identifying customer needs, simplifying complex challenges, and pushing boundaries—always with respect and ambition. With over 850 team members from more than 100 nationalities, we are dedicated to transforming the future of business spending together.About the RoleWe are in search of a Backend Engineer to join our dynamic team at Pleo. In this pivotal role, you will contribute to the development and scaling of our backend systems while engaging in exciting projects that enhance our product and service offerings. If you are enthusiastic about tackling intricate technical problems and thrive in a culture that prioritizes transparency, collaboration, and innovation, this position is ideal for you.What You’ll Be DoingAs a Backend Engineer at Pleo, your responsibilities will include:Designing, building, and maintaining scalable microservices primarily using Kotlin.Collaborating with cross-functional teams to develop innovative solutions across various domains, including Platform and Services.Analyzing system performance and implementing optimizations to ensure high reliability and scalability.Participating in code reviews and post-mortems while providing mentorship to fellow engineers.Proactively addressing technical debt and guiding the team through technical challenges and migrations.What You BringTo excel in this role, you should possess:Experience in server-side programming, particularly in Kotlin, along with familiarity with distributed systems, microservices, and cloud environments (e.g., AWS, Kubernetes).A solid understanding of relational databases and system design principles.

Navigating messy spend management can be complicated, but at Pleo, we are transforming this experience. We develop innovative spend solutions that streamline the management of finances, making it effortless and effective for both finance teams and employees. Our vision is to help businesses 'go beyond'.The name 'Pleo' signifies 'more than you’d expect', a philosophy that has driven our success over the past decade.We are currently at a crucial phase in our journey, where each decision we make influences over 40,000 customers and our overall success. We seek individuals who take pride in identifying customer needs, simplifying complex challenges, and respectfully challenging the status quo—all while aspiring for greatness. With our ambitious goals, we acknowledge that we don't have all the answers, and that's part of the excitement! Our team consists of over 850 passionate individuals from more than 100 nationalities, all dedicated to shaping the future of business spending together.About the RoleWe are on the lookout for a Senior Backend Engineer to join our dynamic team at Pleo. In this position, you will be instrumental in building and scaling our backend systems while engaging in exciting projects as we expand our product and service offerings. If you have a passion for addressing complex technical challenges and thrive in a culture that prioritizes transparency, collaboration, and a strong commitment to innovation, this role is perfect for you.Your ResponsibilitiesAs a Senior Backend Engineer, you will:Lead efforts to design, build, and maintain scalable microservices primarily utilizing Kotlin.Collaborate with cross-functional teams to create innovative solutions across various domains, including Platform, Services, and SMB.Evaluate system performance and implement enhancements to ensure high reliability and scalability.Participate in code reviews, conduct post-mortems, and mentor fellow engineers.Proactively manage technical debt and guide the team through technical challenges and migrations.QualificationsYou will excel in this role if you possess:Expertise in server-side programming languages, particularly Kotlin, along with experience in distributed systems, microservices, and cloud environments (e.g., AWS, Kubernetes).Proficiency with relational databases such as PostgreSQL.

Join Our Team as a Field Sales Territory Manager at SumUp! Location: Copenhagen, Denmark At SumUp, we are a pioneering global fintech company committed to empowering small businesses around the globe. With operations in over 30 countries, we deliver innovative and affordable payment solutions—from card readers to business accounts and online stores. With more than 4 million merchants worldwide, we strive to create an environment where local entrepreneurs can operate their businesses with confidence and ease. We are seeking an energetic and results-oriented sales leader who excels in field operations, builds teams from the ground up, and possesses the ability to scale success. As we expand our reach in Denmark, we are looking for entrepreneurial Field Sales Team Leads to enhance our presence in significant regions. Your Mission: Lead from the front: Actively sell SumUp's POS and card readers in the field, cultivating a deep understanding of the market. Build and lead: Recruit, onboard, and mentor a team of 10–15 commission-based Field Sales Representatives. Scale with impact: Initiate and expand our footprint across various cities and territories. Drive performance: Establish clear objectives, monitor KPIs, and continuously optimize sales conversion and team productivity. Act as a founder: Serve as the local expert, represent the brand, and collaborate with headquarters to deliver strategic insights. We're looking for someone who: Has a proven track record in field sales and direct selling. Possesses experience in building and managing freelance or commission-based sales teams. Is entrepreneurial, driven, and thrives in a fast-paced environment. Understands the unique needs of small businesses and local markets. Is performance-driven and motivated by achieving ambitious targets. Is proficient in using CRM and sales tools for data-informed decision-making. What we offer: Attractive compensation: Competitive base salary plus uncapped commissions. Flexible work model: 70–80% field-based travel across the region. Autonomy: A high-impact role where you take ownership of your territory and results.

OverviewAt Corti, we are dedicated to democratizing access to medical expertise for everyone, regardless of their location.Globally, many individuals still face barriers to quality healthcare. In even the most advanced systems, healthcare outcomes can be inconsistent, and clinicians often find themselves overwhelmed. As medical knowledge evolves at a rapid pace, it can be difficult for healthcare professionals to keep up.Corti is at the forefront of bridging this gap through our AI platform, which enhances access to medical expertise, minimizes errors, and allows clinicians to reclaim their time, making healthcare more affordable and humane.Quality healthcare is built on quality dialogue, and reliable AI systems require a strong foundation. Join us in building both.Why Join Corti?Corti is developing the intelligence layer for global healthcare. We empower every developer, product team, and innovator in healthcare with access to medical-grade AI, enabling the delivery of care that is faster, safer, and more humane.Our models are specifically designed for healthcare and closely related industries, trained on real-world data to ensure precision, safety, and regulatory trust.With our modular APIs, teams can seamlessly integrate medical speech recognition, summarization, reasoning, and more into their healthcare products without having to start from scratch.We support the innovators who are transforming healthcare, from startups enhancing patient experiences to established enterprises modernizing critical systems.If you share our belief that purpose-built AI will shape the future of healthcare, we invite you to be part of Corti. The RoleAre you a curious and innovative individual eager to tackle real challenges in healthcare? Do you have a passion for the Golang programming language?If so, we would love for you to join our dynamic, autonomous, and collaborative team culture, which is anchored in shared values, a commitment to quality, and a spirit of experimentation.As a Senior Backend Engineer on our Engineering team, you will play a key role in developing groundbreaking healthcare products. Your focus will be on creating software that supports the medical community through advancements in speech recognition and text generation. Your contributions will help clinicians, nurses, and doctors learn from their interactions and continuously improve their practice. You'll have the opportunity to learn daily from experts in software engineering, machine learning, and data science—are you ready for this adventure?

At Veo, we are pioneers in AI-driven sports camera technology, offering an innovative, fully automated solution that empowers sports teams to effortlessly capture their matches and training sessions without the need for a camera operator. By democratizing video analysis, we ensure that teams across all levels have access to tools that were once reserved for a select few. Each week, over 40,000 clubs in more than 90 countries trust us to record their games.What truly distinguishes Veo is our team. Our diverse and creative group of innovators and problem-solvers is committed to delivering exceptional products while enjoying the journey together.The OpportunityWe are seeking a Senior Fullstack Engineer to enhance our Monetization team, which focuses on expanding and maintaining Veo's customer base. This vital team influences how users discover, evaluate, purchase, and renew their access to our cutting-edge technology. Your contributions will directly support our mission of making sports technology accessible to everyone.In your role within Monetization, you will develop data-driven, full-stack solutions that refine user experiences from onboarding to purchase and renewal. Our team employs a modern tech stack, including Python, TypeScript, and Rust on the backend, alongside React and TypeScript on the frontend, with a strong emphasis on e-commerce architecture, secure checkout flows, authentication, real-time data pipelines, and application security.

Managing expenses shouldn’t be cumbersome. At Pleo, we're revolutionizing the spend management landscape. Our innovative solutions empower finance teams and employees alike, creating a seamless experience that drives efficiency and effectiveness. Our mission is to help businesses surpass their financial management expectations.The name 'Pleo' translates to 'more than you’d expect', and this philosophy has been at the heart of our success throughout the past decade.As we forge ahead on our exciting journey, each decision impacts over 40,000 customers and our collective success. We seek individuals who take pride in understanding customer needs, simplifying complex problems, and respectfully challenging the status quo. Driven by ambition, we embrace the unknown, as that’s where the excitement lies! Our diverse team of over 850 professionals from more than 100 nationalities is committed to shaping the future of business spending together.About the RoleWe're on the lookout for a talented Backend Engineer to join our dynamic team at Pleo. In this position, you'll be instrumental in building and scaling our backend systems while participating in exciting projects as we expand our product and service offerings. If you are eager to tackle complex technical challenges within a culture that champions transparency, collaboration, and innovation, this role is perfect for you.Your ResponsibilitiesAs a Backend Engineer, you will:Design, build, and maintain scalable microservices primarily utilizing Kotlin.Collaborate with cross-functional teams to innovate solutions across various domains including Platform, Services, and SMB.Analyze system performance and implement optimizations to guarantee high reliability and scalability.Engage in code reviews, conduct post-mortems, and mentor fellow engineers.Tackle technical debt proactively and guide the team through technical challenges and migrations.Your QualificationsTo thrive in this role, you should possess:Experience in server-side programming, particularly with Kotlin, and familiarity with distributed systems, microservices, and cloud environments (e.g., AWS, Kubernetes).Proficiency in relational databases such as PostgreSQL, testing frameworks (e.g., JUnit, Testcontainers), and observability tools like Grafana.

Join our innovative team at veo as a Senior Backend Software Engineer. You will play a pivotal role in designing and implementing backend solutions that enhance our cutting-edge products. Collaborate with cross-functional teams to ensure seamless integration and high performance.

Managing spending can be a daunting task, and inefficient processes create challenges for everyone involved, not just the finance teams. At Pleo, we are revolutionizing this experience. We develop financial solutions that streamline money management, making it empowering and effective for both finance teams and employees, with a mission to help businesses 'go beyond'.The term 'Pleo' translates to 'more than you’d expect', and embracing this philosophy has been key to our success over the past decade.We are currently at a crucial juncture in our growth; every decision we make impacts our 40,000+ customers, our business, and our collective achievements. We seek individuals who relish uncovering customer needs, transforming complex challenges into simple solutions, questioning established norms (with respect), and consistently striving for excellence. With ambitious goals propelling us forward, we acknowledge that we don’t have everything figured out—and that’s part of the excitement! What we can assure you is that we are a motivated, forward-thinking, and, importantly, kind group of 850+ individuals from over 100 nationalities, united in our commitment to shaping the future of business spending together.Role OverviewWe are on the lookout for a Backend Engineer to join the Pleo team. In this exciting role, you will contribute to building and scaling our backend systems while engaging in innovative projects as we expand our product and service offerings. If you are passionate about tackling intricate technical challenges and desire to be part of a culture that emphasizes transparency, collaboration, and a steadfast commitment to innovation, this position is tailored for you.Key ResponsibilitiesAs a Backend Engineer, your responsibilities will include:Designing, building, and maintaining scalable microservices primarily using Kotlin.Collaborating with cross-functional teams to create innovative solutions across various domains, including Platform, Services, and SMB.Analyzing system performance and implementing optimizations to ensure high reliability and scalability.Participating in code reviews, conducting post-mortems, and mentoring fellow engineers.Proactively addressing technical debt and guiding the team through technical challenges and migrations.QualificationsTo thrive in this role, you should possess:Experience with server-side programming languages, particularly Kotlin, along with familiarity with distributed systems, microservices, and cloud environments (e.g., AWS, Kubernetes).Proficiency in relational databases such as PostgreSQL, testing frameworks (e.g., JUnit, Testcontainers), and observability tools like Grafana.

Managing expenses shouldn't be a complicated task. At Pleo, we are revolutionizing the way finance teams and employees handle spend management, making it seamless, empowering, and remarkably efficient. Our goal is to help businesses 'go beyond' the ordinary.The name 'Pleo' translates to 'more than you’d expect', and we have embraced this philosophy for over a decade, which has been key to our success.As we progress on our journey, every step we take significantly impacts our 40,000+ customers and our overall business success. We seek individuals who take pride in identifying customer needs, simplifying complex issues, and respectfully challenging the status quo, all while aiming for excellence. With ambitious goals ahead, we recognize that we don’t have all the answers, and that’s part of the excitement! Our team is a diverse and progressive group of over 850 individuals from more than 100 nationalities, all dedicated to shaping the future of business spending together.We are currently looking for a Staff Backend Engineer to join our Treasury Management team. In this role, you will set the technical vision and deliver robust backend systems that enable customers to optimize liquidity, forecast cash flow, and automate treasury processes.About Treasury ManagementThe Treasury Management team focuses on helping companies streamline and automate their cash management processes.Liquidity management: Gain visibility and control over cash with real-time balance and cash flow data.Forecasting: Assist finance teams in understanding potential future cash positions through spend projections and cash flow forecasting.Automation: Minimize manual finance tasks with transfer rules and alerts.Treasury capabilities: Manage deposits and multi-currency funds.Integrations: Collaborate with external providers and other Pleo teams to deliver comprehensive treasury functionalities with accuracy and dependability.Your ResponsibilitiesYou will serve as a catalyst for backend service delivery and technical strategy.Lead the design, development, and maintenance of scalable backend services (primarily using Kotlin).Oversee and enhance service architecture, APIs, and data models in a financial context, maintaining a high standard of accuracy.

Corti is seeking a Senior Backend Engineer with a focus on speech recognition to join the team in Copenhagen, Denmark. This position centers on building and improving backend systems that support advanced speech recognition features. Role overview The Senior Backend Engineer will work on backend development projects aimed at strengthening Corti’s speech recognition technology. Collaboration with teams across engineering, product, and other functions is an essential part of the role, ensuring that solutions meet high standards for performance and reliability. What you will do Develop and maintain backend systems that power speech recognition features Work closely with colleagues from different departments to align on technical goals Contribute to the quality, reliability, and scalability of Corti’s technology Requirements Experience in backend engineering Background or strong interest in speech recognition systems Ability to collaborate with cross-functional teams

Airapps seeks a React Engineer to join the team in Copenhagen. This position centers on building web applications that enhance user experience and encourage engagement. Collaboration is a key part of the role, especially with design and product teams to bring new ideas to life as dependable, high-quality features. Responsibilities Develop and maintain web applications using React Work closely with designers and product managers to implement new features Ensure applications perform well across a range of devices and browsers Location This role is based in Copenhagen.

Join SOUNDBOKS, a cutting-edge technology firm and vibrant lifestyle brand renowned for our innovative Bluetooth speakers and audio-reactive lighting solutions. Whether at music festivals, street gatherings, or private celebrations, we transform moments into unforgettable memories with our powerful sound systems.At SOUNDBOKS, we foster a culture of trust and collaboration. Our team members are empowered to take ownership of their projects while receiving unwavering support from their colleagues. Every voice matters, and we believe that collective ideas drive our success.This role is more than just a job; it’s an opportunity to be part of a passionate community where we uplift each other, celebrate achievements, and dedicate ourselves to creating meaningful experiences. With a dynamic team of 70, SOUNDBOKS is a place where you can excel and feel a true sense of belonging.ROLE: Mechanical EngineerTEAM: Product DevelopmentHOURS: Full TimeLOCATION: CopenhagenSTART DATE: June 1st, 2026 or as soon as possibleThe Product Development team oversees the entire product lifecycle, from conceptualization to mass production. Our collaborative and driven team members possess a broad understanding of various disciplines and take ownership of their responsibilities, making a significant impact on our products, the team, and our customers.As a Mechanical Engineer at SOUNDBOKS, you will engage in the mechanical development of our products, closely collaborating with the Lead Mechanical Engineer, the Product Development team, Quality Assurance, and external partners in Asia. Leveraging your engineering expertise, you will assist in developing mechanical engineering (ME) concepts and help convert innovative ideas into precise mechanical assemblies, ensuring compliance with Design for Manufacturing (DFM) standards. You will work with internal stakeholders, partners, and suppliers to ensure a smooth transition from product conception to mass production while upholding high-quality standards and contributing to an exceptional customer experience.Here’s a snapshot of your daily responsibilities:Mechanical Design & PrototypingEngage in the mechanical development of new SOUNDBOKS products.Contribute to the enhancement of industrial design...

airapps is looking for an iOS Engineer in Copenhagen to help shape and build mobile applications. This position centers on creating apps that offer smooth, reliable experiences for users. What you will do Design and develop mobile applications for iOS devices Work closely with colleagues from different teams to define and deliver new features Focus on performance and responsiveness to ensure each app meets high standards Who we’re looking for Experience building iOS applications Comfort working in a collaborative, team-oriented environment Commitment to delivering quality user experiences

Managing expenses can often feel overwhelming, and cumbersome processes can hinder efficiency for finance teams and employees alike. At Pleo, we are revolutionizing this experience by providing innovative spend management solutions that simplify financial operations. Our aim is to empower finance teams and employees by making money management seamless and surprisingly effective, all while helping businesses ‘go beyond’.The name ‘Pleo’ translates to ‘more than you’d expect’, a philosophy that has driven our success for over a decade.As we embark on this critical phase of our journey, every decision we make impacts our 40,000+ customers and the overall success of our business. We seek individuals who are passionate about identifying customer needs, transforming complex challenges into straightforward solutions, and who are not afraid to challenge the status quo, all while maintaining a respectful and collaborative atmosphere. Our ambitious vision is matched by our diverse team of over 850 professionals from more than 100 nationalities, all dedicated to shaping the future of business spending together.About the RoleWe are in search of a Senior Backend Engineer (with Tech Lead responsibilities) to join our Accounting Integrations team at Pleo. This team operates at the intersection of Pleo and our external partners, engaging in two primary modes of work: enhancing existing integrations and establishing scalable integration foundations.In this role, you will play a crucial part in defining the technical direction and quality standards for the team, guiding the transition from merely “shipping integrations” to developing a comprehensive “integrations system.” If you thrive on tackling complex technical challenges and wish to contribute to an environment that values transparency, collaboration, and a strong commitment to innovation, this position is tailored for you.What You’ll Be DoingAs a Senior Backend Engineer, you will:Guide the technical direction of our integration platform and delivery efforts, balancing trade-offs and prioritizing pragmatically.Establish and elevate engineering quality standards for integrations (including testing expectations, reliability, security, logging), applicable to both internal and external development efforts.Lead initiatives that foster scalability, including the creation of reusable patterns and tooling (e.g., IDK) along with frameworks that minimize one-off implementation tasks, primarily utilizing Kotlin.Enhance team workflows: planning, prioritization, and shielding the team from mid-week disruptions.Collaborate effectively with cross-functional teams to develop robust solutions.

Kubapay seeks a Support Engineer in Copenhagen to assist customers with payment solutions. The position centers on technical support and troubleshooting, ensuring clients receive timely help when issues arise. Key responsibilities Handle customer inquiries and technical questions about Kubapay products Identify and resolve problems to keep clients operational Offer clear, practical support so customers can use Kubapay services effectively Location This role is based in Copenhagen, Capital Region of Denmark.

airapps is looking for a Release Engineer in Copenhagen to help strengthen our software deployment process. This position works closely with teams across the company to coordinate and deliver application releases smoothly and reliably. What you will do Maintain and improve continuous integration and continuous delivery (CI/CD) pipelines Automate build processes to support efficient software delivery Collaborate with cross-functional teams to support application releases Troubleshoot deployment issues and apply best practices to improve release quality Requirements Experience with CI/CD tools and build automation Strong problem-solving skills for troubleshooting release issues Ability to work effectively with technical and non-technical teams This role focuses on ensuring every release meets quality standards and runs efficiently. Technical expertise and a collaborative approach are essential for success in this position.

About HappyRobotHappyRobot is an innovative AI-native operating system designed to transform the real economy by bridging the gap between intelligence and action. Our platform integrates real-time data, specialized AI agents, and orchestrating intelligence to empower enterprises to manage complex and mission-critical operations autonomously.By optimizing knowledge, enhancing efficiency at every operational level, and evolving continuously, we focus on supply chain and industrial-scale operations, where resilience, speed, and constant improvement are paramount. This enables our clients to allocate their human resources towards strategic, creative, and high-value endeavors.Discover our vision by visiting our Manifesto. To date, HappyRobot has secured $62 million in funding, including a recent $44 million Series B round in September 2025. Our esteemed investors include Y Combinator (YC), Andreessen Horowitz (a16z), and Base10—partners who share our commitment to redefine enterprise operations. We are channeling this investment into creating a world-class team of driven individuals with exceptional problem-solving abilities and a passion for innovation in a fast-paced environment. If our mission resonates with you, you will thrive at HappyRobot.Role OverviewWe are seeking a dynamic and highly skilled Forward Deployed Engineer to join our team. This role blends technical expertise with outstanding communication skills, working closely with customers to ensure they derive maximum value from our AI platform. Your responsibilities will include onboarding, implementation, and ongoing support, alongside contributing to product development and innovation.At HappyRobot, we operate without seniority or hierarchy—our team is built on collaboration. We execute, innovate, take ownership, and genuinely care about our clients' success.