Fullstack Backend Engineer (Node.js) at SumUp | Copenhagen

Jobgether is hiring a Senior Node.js Backend Developer for a partner company based in Denmark. This role is remote-first, allowing for flexibility while working with colleagues from around the world. Role overview This position focuses on designing, building, and maintaining backend systems with Node.js. The team develops and optimizes real-time APIs and services that support digital finance products used globally. Collaboration with engineers from different regions is central, with an emphasis on sharing knowledge and solving technical challenges together. Key responsibilities Create secure and scalable backend systems using Node.js Develop and improve real-time APIs and services for digital finance applications Contribute to the architecture of distributed systems and infrastructure for mission-critical workloads Apply best practices in backend development and performance tuning Who thrives here Developers who enjoy tackling complex backend challenges and building dependable infrastructure Engineers who value autonomy and ownership, especially in a remote-first setting Those with strong experience in backend architecture, distributed systems, and performance optimization People motivated by delivering products that make a global impact Work environment Remote-first team distributed across several regions Focus on innovation, ongoing learning, and collaboration Chance to help shape next-generation financial products and services

At ChurchDesk, we are dedicated to empowering churches to thrive in an ever-evolving landscape. Our innovative SaaS solutions offer essential digital tools that help churches enhance their operations, improve communication, and foster community engagement. From our humble beginnings as a startup to our current status as a global player, we pride ourselves on maintaining a close-knit, collaborative team where your contributions are recognized from the outset. We champion diversity and inclusion, embracing the unique perspectives each team member brings to our mission.About Your New RoleAs a Senior Backend Engineer, you will:Take active ownership of backend projects, tackling complex challenges and ensuring successful implementation.Significantly influence our backend architecture, promoting best practices while ensuring a scalable and efficient infrastructure.Guide and mentor fellow engineers, enhancing the team's technical skills and expertise.Work closely with product managers, designers, and engineers to guarantee that backend solutions meet product objectives.Develop reliable, scalable, and modular systems utilizing NodeJS, TypeScript, MySQL, Redis, and ElasticSearch.Contribute to the ongoing enhancement of our engineering methodologies and the evolution of our product in response to customer insights.

Trackman is building a global Booking & Payment platform used by millions. The team in Hørsholm, Sjælland, Denmark is looking for a Senior Backend Developer to help scale and improve these services as the user base grows. What You Will Do Design, build, and maintain backend services and APIs for a Booking & Payment platform that supports over 3 million users, with a focus on quality, speed, and scalability. Own technical solutions end-to-end: shape requirements, design architectures that connect multiple systems, and coordinate with other teams to manage dependencies. Work hands-on with Node.js using JavaScript and TypeScript. Contribute to architecture, implementation, code reviews, and technical choices. Partner with Product Management, QA, and UI/UX teams to define requirements and deliver APIs, contracts, and integrations. Share knowledge through mentoring, collaboration, and clear technical communication.

Join our dynamic team as a Senior Software Engineer specializing in Java Backend Development. You will play a pivotal role in designing, developing, and maintaining high-performance backend systems that support our innovative solutions. Collaborate with cross-functional teams to deliver robust and scalable applications, while ensuring code quality and efficient development processes.

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 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.

As a Senior Backend Software Engineer at Databricks, you will collaborate with your team to architect and develop scalable infrastructure solutions for the Databricks platform.Your Impact:Our backend engineering teams engage in a variety of critical domains, including core compute fabric resource management, service platforms, and machine learning infrastructure. Your responsibilities may include:Facilitating Databricks' expansion by creating foundational infrastructure platforms that support seamless functionality across diverse geographic regions and cloud service providers.Developing cloud-agnostic infrastructure abstractions to empower Databricks engineers in efficiently managing and operating their services.Creating tools and processes that enhance engineering productivity at Databricks, focusing on improving the developer experience across multiple areas, such as programming languages, linters, static analysis, integrated development environments (IDEs), remote development environments, automated release pipelines, and test automation frameworks. A current priority is optimizing the Rust development experience organization-wide.

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 ChurchDesk, we strive to empower churches to evolve and maintain strong connections with their communities in an ever-changing environment. As a leading SaaS provider, we offer innovative digital tools designed to simplify operations, enhance communication, and foster engagement within congregations. Over the past 15 years, we've transformed from a startup into an international enterprise while fostering a tight-knit, collaborative culture where your contributions will be evident from day one. We celebrate diversity and inclusivity, valuing the distinctive viewpoints each individual adds to our mission.About Your New RoleAs a Lead Software Engineer, you will:Shape the technical vision and architecture for projects within your area of expertise (Frontend or Backend).Take hands-on ownership of intricate challenges and deliver high-quality solutions.Mentor and coach fellow engineers, promoting growth, best practices, and knowledge sharing within the team.Collaborate with product managers, designers, and engineers to define product strategy and direction.Establish and uphold engineering standards, processes, and tools across the team.Leverage AI-assisted workflows and automation to enhance productivity and focus on high-impact initiatives.Balance technical decisions with long-term maintainability, scalability, and team effectiveness.Provide leadership and guidance to the engineering team, ensuring alignment, professional development, and a collaborative culture.

Managing expenses can often be a convoluted task, leading to frustrating processes that benefit no one, especially not finance teams. At Pleo, we are revolutionizing this landscape. Our innovative spend management solutions make financial oversight effortless and empowering, catering to the needs of finance teams and employees alike, with a mission to help businesses 'go beyond'.The name 'Pleo' embodies our philosophy of exceeding expectations, which has been the cornerstone of our achievements over the past decade.As we reach a significant phase in our journey, each decision we make directly influences our 40,000+ customers and the overall success of our business. We are on the lookout for talented individuals who take pride in identifying customer needs, simplifying complex challenges, questioning established norms (with respect), and consistently setting high standards. With ambitious goals propelling us forward, we embrace the uncertainty of our path, which is part of the excitement! We are a diverse, dynamic, and kind team of over 850 professionals from more than 100 nationalities, all dedicated to reshaping the future of business spending.

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

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.

At Databricks, we are dedicated to empowering data teams to tackle some of the most pressing challenges in the world — from revolutionizing transportation to speeding up medical innovations. Our mission is to create and maintain the leading data and AI infrastructure platform, enabling our clients to leverage deep data insights for business enhancement. Founded by engineers with a customer-centric mindset, we seize every opportunity to address technical challenges, whether it's designing next-generation UI/UX for data interaction or scaling our services and infrastructure across millions of virtual machines. And we’re just getting started.As a Backend Software Engineer, you will collaborate with your team to develop infrastructure for the Databricks platform at scale.

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.

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.

Navigating the complexities of spend management can be a daunting task. At Pleo, we are redefining this experience by creating financial solutions that streamline money management for finance teams and employees alike. Our goal is to empower organizations to go beyond traditional boundaries.The name ‘Pleo’ translates to ‘more than you’d expect,’ a philosophy that has fueled our success for over a decade.We find ourselves at a critical juncture in our growth journey; every decision impacts our 40,000+ clients and our overall trajectory. We seek individuals who take pride in understanding customer needs, transforming intricate problems into straightforward solutions, and who are not afraid to challenge the status quo in a respectful manner. Driven by our aspirations, we embrace the unknown as part of our adventure. Our diverse team of over 850 colleagues from more than 100 nationalities is committed to shaping the future of business spending together.About the RoleWe are on the lookout for a Backend Engineer to join the dynamic Pleo team. In this role, you will contribute to the development and scaling of our backend systems while engaging in exciting projects as we expand our product and service offerings. If you are enthusiastic about tackling complex technical challenges within a culture that prioritizes transparency, collaboration, and a strong commitment to innovation, this position is ideal for you.Your ResponsibilitiesAs a Backend Engineer, your tasks will include:Designing, building, and maintaining scalable microservices, primarily utilizing Kotlin.Working collaboratively with cross-functional teams to devise innovative solutions across various domains including Platform, Services, and SMB.Assessing system performance and implementing optimizations to guarantee high reliability and scalability.Participating in code reviews and post-mortems while mentoring junior engineers.Proactively managing technical debt and guiding the team through challenges and migrations.Your ProfileYou will excel in this role if you possess:Experience with server-side languages, particularly Kotlin, and familiarity with distributed systems, microservices, and cloud environments (e.g., AWS, Kubernetes).Proficiency with relational databases like PostgreSQL and an understanding of system optimizations.

As a Staff Software Engineer specializing in backend development, you will collaborate with your team to architect and build scalable infrastructure for the Databricks platform. Your Impact: Our backend teams are engaged in a variety of domains, including core compute fabric resource management, service platforms, and machine learning infrastructure. You will tackle significant challenges such as: Enhancing Databricks' growth by developing foundational infrastructure platforms that ensure seamless operations across multiple geographic regions and cloud providers. Creating cloud-agnostic infrastructure abstractions to empower Databricks engineers to efficiently manage and operate their services. Designing tools and processes that boost engineering efficiency at Databricks, improving the developer experience across various domains including programming languages, linters, static analysis, IDEs, remote development environments, automated release pipelines, and test automation frameworks. Currently, we are focused on optimizing the Rust development experience across the organization.

Are you a passionate Backend Engineer looking to make an impact? Join Otter, a forward-thinking company based in Aarhus, Denmark, where we are dedicated to creating innovative solutions that enhance user experiences. As a Backend Engineer, you will play a crucial role in developing robust backend systems that support our applications.

Jobgether is looking for a Senior Unity Developer to focus on poker applications. This position is based in Denmark and centers on building and refining gaming experiences for poker players. Role overview The Senior Unity Developer will design, develop, and optimize poker games using the Unity engine. Working closely with other teams, this role ensures each release meets player expectations for quality and engagement. What you will do Develop and implement new features for poker games within Unity. Optimize game performance to support a smooth and enjoyable experience for players. Work alongside designers and artists to shape gameplay mechanics that keep players engaged. Take part in code reviews and help maintain strong coding standards across the team. This role suits someone with a strong background in Unity development and a keen interest in poker applications, ready to collaborate and deliver polished gaming products.