Principal Engineer (Backend)

Join Kaizen Gaming!As one of the leading GameTech companies globally, Kaizen Gaming powers Betano and operates in 19 markets. We are dedicated to leveraging the latest technologies to deliver unparalleled entertainment experiences to millions of customers.Our diverse team of over 2,700 professionals, representing more than 40 nationalities across three conti…

About the RoleWe are seeking an experienced Senior Backend Engineer to become a vital member of our Main Application Team (MAT). In this influential role, you will be instrumental in designing and enhancing the backend systems that drive Rossum’s primary product, facilitating complex document processing workflows and extensive data flows utilized by our global customers.This position transcends mere implementation; our engineers understand that technical debt and scalability are challenges we must tackle. We are looking for you to help define those solutions. You will collaborate closely with Product, Frontend, and other Backend teams to implement features that effectively balance immediate requirements with long-term maintainability.What You'll DoAs a key contributor to our backend initiatives, you will oversee daily operations while identifying strategic enhancements to ensure our systems remain reliable and easy to develop upon.Your main responsibilities will include:Designing, implementing, and maintaining backend services and APIs for Rossum’s core platform.Taking ownership of significant backend features or components from conception to production.Writing high-quality, thoroughly tested code with a persistent focus on scalability, reliability, and security.Collaborating across departments, engaging in code reviews to provide constructive feedback and working closely with Frontend and Product teams.Proactively identifying and addressing performance, reliability, and operational challenges to foster technical excellence.Who You AreWe are looking for a straightforward problem solver who is not afraid to question assumptions. You should possess:Robust professional experience in backend engineering within a production environment.Expertise in Python (or a similar backend language) with a solid grasp of relational databases.A blend of hands-on execution and strategic thinking, particularly in designing REST APIs and managing backend services.Familiarity with AI coding tools and a proven history of driving features through their complete lifecycle.

Keboola has successfully secured $32 million in funding, marking the largest Series A round in Central Europe for 2023. Our mission is to transform the way businesses engage with data. Our innovative platform enables clients to achieve results that are ten times more impactful, and we are now expanding our reach globally to empower data teams to accelerate their processes, enhance their decision-making, and create significant outcomes.We are on the lookout for a talented and experienced Principal Engineer / Software Architect to become a vital part of our engineering team and influence the future of Keboola’s platform. This role is critical in steering our technical vision, making strategic architectural decisions, promoting adherence to the highest industry standards, and equipping teams to develop and scale our platform effectively. You will be instrumental in designing and establishing a core platform architecture that is resilient, scalable, secure, and easy to maintain in a landscape driven by data and artificial intelligence.In this role, you will collaborate closely with our backend engineering teams, serving as a technical partner and multiplier. Your support will include preparing best practices, providing tooling, and establishing architectural guidelines, all aimed at helping them build and manage secure services at scale while being cost-conscious. The ideal candidate will possess a robust software engineering background, experience in designing complex SaaS or data platforms, familiarity with cloud providers, and a proven history of leading cross-functional technical initiatives.While our primary language is English, proficiency in Czech or Slovak could be beneficial given our headquarters' location.

Why Join NebiusNebius is at the forefront of revolutionizing cloud computing to empower the global AI economy. We provide innovative tools and resources that enable our clients to tackle real-world challenges and revolutionize industries, all while minimizing infrastructure costs and avoiding the need for extensive in-house AI/ML teams. Our team collaborates with some of the most skilled and inventive leaders and engineers in AI cloud infrastructure.Our Work EnvironmentWith our headquarters in Amsterdam and listed on Nasdaq, Nebius boasts a worldwide presence with R&D centers across Europe, North America, and Israel. Our diverse team of over 1400 includes more than 400 exceptionally talented engineers with profound expertise in both hardware and software engineering, complemented by an in-house AI R&D division.Position OverviewWe are seeking a Senior Backend Software Engineer to contribute to the development of our hyperscaling platform.Responsibilities will involve significant tasks in Golang, with additional work in Java and Python.You have the flexibility to work from our offices in Prague, Amsterdam, or Berlin—whether in a hybrid setting or remotely.Key Responsibilities:Design and develop fault-tolerant, reliable cloud services, including cloud infrastructure, managed databases, Kubernetes orchestration, billing systems, monitoring systems, ML services, and more.

Join Our Innovative Team at EmplifiAt Emplifi, we are redefining customer engagement. Our unified platform empowers over 20,000 leading brands globally to enhance their digital and social customer experiences. By seamlessly integrating social media marketing, commerce, care, unified analytics, and AI, we enable companies to achieve greater growth through improved customer satisfaction, increased sales, and heightened brand loyalty.About the Parsers TeamThe Parsers Team plays a crucial role in ensuring our clients gain actionable insights for growth. We maintain a robust, reliable, and observable data flow from third-party APIs. Our responsibilities include monitoring API changes, integrating new data sources, and delivering high-quality data to downstream systems. With hundreds of thousands of I/O operations occurring each second, the challenge is significant. As we seek to enhance this platform, we invite a talented Backend Engineer to join our collaborative and friendly team, dedicated to building systems that are scalable, reliable, and maintainable. We value cooperation, creativity, diligence, and a healthy sense of humor.Key ResponsibilitiesEnhance and maintain our platform with innovative features.Contribute to a codebase of clean, well-tested code.Review code to uphold our quality standards.Monitor system performance and logs, troubleshoot issues, and develop tools for observability.Participate actively in our Scrum process.Invest in continuous personal development to advance your career.Collaborate effectively with a supportive team of professionals.Enjoy the journey of exploration and experimentation.QualificationsMinimum 1 year of experience with Node.js.A strong willingness to learn and adapt.Solid understanding of clean code principles and testing methodologies.Familiarity with database systems.Experience with Git and modern development workflows.Bonus: Experience in distributed systems or high-throughput environments.Our Tech StackLanguages & Frameworks: Node.js, TypeScriptInfrastructure: AWSDatabases: SQL & NoSQL

Veeam is recognized as a leader in data management and AI trust, dedicated to empowering organizations to safeguard their data and AI capabilities. We are at the forefront of data resilience and security posture management, designed to harmonize identity, data, security, and AI risk management. Headquartered in Seattle, we have a global presence with offices in over 30 countries and serve more than 550,000 customers who rely on Veeam to ensure their operations remain seamless. Join our dynamic team as we pursue growth, innovation, and impactful contributions for some of the world’s largest enterprises.About the RoleAs a leader in Kubernetes Backup and Disaster Recovery, we offer Veeam Kasten, a purpose-designed data management platform for Kubernetes. This platform equips enterprise operations teams with a user-friendly, scalable, and secure solution for backup, restore, disaster recovery, and application mobility while maintaining exceptional operational simplicity. We continuously optimize and expand our Kubernetes capabilities to address our customers' evolving needs, currently enhancing integrations with SaaS services and supporting virtual machines hosted within Kubernetes.

Groupon is a dynamic marketplace where customers uncover exciting new experiences and services every day, empowering local businesses to thrive. With over a million merchant partners globally, we connect more than 16 million customers to amazing deals across diverse categories. In a market often dominated by e-commerce behemoths, Groupon distinguishes itself as one of the few platforms genuinely committed to driving local business success on a performance basis.We are on a transformative journey, relentlessly pursuing results while fostering a culture that inspires innovation, rewards risk-taking, and celebrates success. Despite our global presence with thousands of employees, we maintain a close-knit culture where one individual can make a significant impact. We embody the "best of both worlds"; large enough to provide resources and scale, yet small enough to allow personal autonomy and meaningful contributions.About the Role Join Groupon’s next chapter, driving AI-powered innovation from either Valencia or Prague.Are you a hands-on technical leader prepared to shape the future of B2B platforms? This is a pivotal moment for Groupon as we aggressively pursue an AI-first strategy and modernize our technology stack. As the new Backend Engineer for Deal Management, you will architect, develop, and enhance systems that empower local businesses globally, building from the ground up.

JetBrains has developed tools for software teams since 2000. By automating routine checks and corrections, JetBrains products help developers focus on building and shipping software. The goal: make development more productive and creative. Role overview This Backend Customer Success Engineer role centers on supporting engineering teams as they adopt Kotlin for backend development. The position focuses on helping organizations successfully bring Kotlin into production environments. What you will do Guide organizations through the process of moving from Java to Kotlin, assisting with migration, integration, and scaling. Troubleshoot technical challenges that arise during the transition and support teams as they progress from initial experimentation to stable production use. Work with potential users to clarify how Kotlin adoption works and help design migration plans that fit their specific needs. Locations Amsterdam, Netherlands Berlin, Germany Munich, Germany Prague, Czech Republic Remote, Germany

At JetBrains, we are passionate about code. Since our inception in 2000, we have dedicated ourselves to developing the strongest and most effective developer tools available. Our innovative solutions automate routine checks and corrections, accelerating production and empowering developers to innovate, explore, and create.About the InitiativeJetBrains is transforming from standalone developer tools to a unified, AI-native platform for software development.AI is evolving from a mere assistant within the editor to an essential participant in software planning, building, reviewing, and operating across teams and organizations. This evolution presents new challenges that cannot be addressed by individual tools alone, including governance, security, cost management, observability, and cooperation between humans and autonomous agents.Our mission is to establish a platform that facilitates the adoption of AI in software development in a structured, scalable, and economically efficient manner, without confining companies to closed ecosystems.We are constructing a foundation that unifies developer workflows, team collaboration, and organizational oversight into a coherent system.This platform will act as the execution and governance layer for AI-driven development, tightly integrated with developer tools while designed for cross-team, product, and environmental compatibility.This initiative represents a long-term strategic investment for JetBrains and is a cornerstone of our vision for the future of software development. The RoleWe are seeking a Principal Engineer (JetBrains Cloud Platform, Developer Experience) to spearhead significant enhancements to the development experience across the JetBrains Cloud Platform (JCP).This position is pivotal in enhancing the productivity of JCP engineers through improvements to build systems, CI/CD pipelines, local development workflows, tooling infrastructure, and AI pipelines. You will oversee the developer experience from the local development, build, and testing stages to the transition of code through CI to production. Given the rapid growth of this platform, numerous workflows and processes are still in development. You will define what an exceptional development experience entails and guide the organization toward achieving it. As part of our team, you will:Develop and implement strategies for enhancing the developer experience across the entire JCP platform.Optimize build systems (such as Gradle and Nx) for improved speed, caching, and reliable reproducibility at scale.Establish AI development pipelines to facilitate innovation.

Apify builds tools that let people and organizations automate online tasks, extract web data, and use AI agents to get more done. The company believes that repetitive digital work, like filling out forms, copying data, or searching for visual details, should be handled by machines so people can focus on more meaningful problems. Web automation helps users in practical ways: some automate unsubscribing from services to save money, others collect large datasets for AI training, consumer protection, or even tracking missing children. Apify also supports AI chatbots with relevant data and explores new ways to connect with generative AI platforms. To keep advancing this mission, Apify is hiring a Senior Backend Engineer focused on proxy infrastructure and unblocking. This role is based in Prague. What You Will Do Design and build bots that imitate real user actions to automate online processes. Work closely with a small, skilled team of developers. Improve Apify Proxy and related backend technologies. About the Role As anti-bot systems evolve, Apify needs to keep its scraping infrastructure ahead of the curve. This engineer will strengthen Apify Proxy, research anti-scraping defenses, and create internal tools using browser fingerprinting, human-like interaction patterns, and session management to keep data flowing smoothly. The team values engineers who enjoy solving tough technical problems and want to contribute to open-source proxy libraries. Location Prague

Role overview Pure Storage is looking for a Backend Engineer in Prague, Czech Republic, with a focus on secrets management. The position involves building and refining backend systems that safeguard sensitive information. The team uses C++ and Java to create secure, dependable solutions for customers. What you will do Develop and maintain backend components that support secrets management features Use C++ and Java to implement secure storage and manage access controls Work closely with other engineers to enhance data protection and ensure system reliability Team culture The Prague engineering group values security, code quality, and collaboration. Team members support each other while tackling complex technical challenges and designing technology that customers trust.

Apify builds automation tools, AI agents, and web scraping technology to help people get more from the web. The goal: let machines handle repetitive online tasks, so people can focus on work that matters. Everyday chores like filling out forms, building large spreadsheets, or searching through countless videos for a single image are handled by Apify’s platform. Automation here is more than convenience, it can save money, collect data for AI, protect consumers, and even support efforts to find missing children. The team also creates AI chatbots with the right context for smart conversations and explores new ways to work with generative AI tools such as ChatGPT. What You'll Work On Improve and scale Apify’s core web scraping and automation systems, which run on AWS. Work closely with a small, experienced group of engineers from different backgrounds. Design and build new features while solving real scalability problems. Contribute to a platform built by developers, for developers. The team uses Apify’s own tools daily and is committed to open-source, sharing code on GitHub and welcoming pull requests. Role Details Title: Senior Backend Engineer for Developer Platform Stack: Node.js, TypeScript Location: Prague

Wrike stands as a premier work management platform, expertly designed for teams and organizations striving for collaboration, innovation, and excellence daily. With Wrike, all work converges in a unified space, eliminating complexity, enhancing productivity, and allowing individuals to concentrate on meaningful tasks. Our Vision: A world where everyone can focus on their most purposeful work, collaboratively. Discover More About Wrike TeamAt Wrike, every voice is significant. Our Scrum teams, which include FE, BE, QA, UI, UX, and a PO, are central to our decision-making process. Backend engineers within product teams tackle both business logic and technical challenges, while technical teams facilitate smooth internal tooling, CI/CD, and an exceptional developer experience. We prioritize our architecture, deploy daily with minimal merge conflicts, and encourage backend engineers to innovate, work on technical enhancements, and contribute to product plans by sharing insights with POs. As we transition to a microservice architecture, product teams gain increased ownership and flexibility, supported by technical teams. Our mission is to simplify our clients' experiences by creating intuitive and powerful solutions suitable for everyone—from startups to large enterprises.Are you a dedicated Backend Engineer? This is more than just a job posting—it's an invitation for you to connect with Wrike for potential future opportunities. By joining our talent pool, you can introduce yourself and explore our culture, projects, and technologies. Even if we don't have a current opening, we're always excited to meet skilled professionals. Apply today to start a dialogue and learn more about life at Wrike.What We’re Working On:Designing, building, and enhancing product features from the ground up or improving existing functionalities.Collaborating to tackle complex challenges and refining solutions as a collective team.Ensuring high technical quality through thorough code reviews, testing, and task estimation.Adopting rapid, iterative development while adhering to best practices.Utilizing AI tools daily to automate processes and enhance productivity.Fostering continuous learning and supporting each other’s professional growth.Our Technology Stack:Java (21), Spring, REST APIs, SQL.PostgreSQL, Redis, RabbitMQ.Unit/integration testing, Java web stack.AI tools (Cursor, Zencoder, etc.; internal AI portal; internal MCP).

Join a cutting-edge tech company that is revolutionizing the data storage landscape! At PureStorage, you will be at the forefront of innovation, collaborating with some of the brightest minds in the industry. If you're ready to embrace a world of limitless opportunities and make a significant impact, we invite you to be part of our journey.THE ROLEAs a member of the FlashArray team, you will contribute to the development of the most advanced, high-performance, and reliable product portfolio tailored for mission-critical applications. Though we provide a hardware storage array, our engineering team is predominantly composed of software engineers. Our customers value FlashArray for its ease of management, continuous upgrades, and the ability to leverage cutting-edge technology without downtime. In this role, you will focus on enhancing our virtualization ecosystem, working on plugins like vSphere, Veeam, PowerShell, and more to ensure seamless integration with FlashArray.WHAT YOU'LL DODesign and implement innovative features and technologies for high-performance virtualization integrations.Take ownership of FlashArray virtualization plugins from inception to delivery.Analyze and resolve complex challenges across virtualization platforms with a focus on simplicity and scalability.Collaborate with talented peers who inspire and motivate you.Delight customers by enabling smooth integration of FlashArray into their virtualization environments.Grow your knowledge base, whether you're a seasoned expert or just starting out in virtualization, storage, or system software.We primarily operate in an in-office setting, so you will be expected to work from our Prague office in accordance with Pure's policies, except during approved leave or work-related travel.

Join us as a Principal Statistician focusing on Pharmacokinetics at psicro, a leading data management and analytics firm located in beautiful Prague. In this pivotal role, you will leverage your expertise in pharmacokinetics to guide statistical analyses and contribute to innovative drug development projects. Collaborate with multidisciplinary teams, applying advanced statistical techniques to ensure the integrity and efficacy of our clinical data.

Wrike stands as the premier work management platform designed for teams and organizations striving for enhanced collaboration, creativity, and achievement every day. Our platform unifies all work processes and teams, simplifying complexities, boosting productivity, and allowing individuals to concentrate on their most meaningful tasks. Our Vision: A world where everyone can focus on their most meaningful work, together. About the Role: Join Wrike's Backend Reliability (BRE) team, a crucial component of our backend infrastructure and the guardian of our uptime. We aim to achieve and maintain 99.99% availability while developing the tools, components, and safety nets relied upon by our entire engineering organization. As a Senior / Staff Backend Engineer on this team, you will not merely address tickets but architect essential reliability solutions that influence how Wrike scales, operates, and recovers from failures.Your Impact: Design, build, and maintain vital reliability components including HTTP rate limiters, internal DB schema migration tools, circuit breakers, and distributed Redis-based caching.Troubleshoot intricate production issues, optimize PostgreSQL usage, and ensure our distributed systems remain robust and stable under high load.Lead initial investigations during significant production incidents to identify probable root causes, assess impacts, and suggest mitigation strategies. Long-term solutions are then implemented by the responsible teams based on your insights.Develop scalable, reusable tools and frameworks aiding other engineering teams in building more resilient services.Utilize AI-driven tools and coding agents to expedite development, scrutinize architectures, and automate repetitive or error-prone tasks.Promote reliability best practices across engineering through knowledge sharing, design reviews, and establishing high technical standards.Your Qualifications: Proficient in Java/JVM, with experience in building scalable, high-performance backend systems; willing to adopt other languages as necessary.Strong grasp of distributed systems concepts, including high availability, the CAP theorem, and fault tolerance.Extensive experience with relational databases (PostgreSQL) and non-relational storage solutions.

Why Join Nebius?Nebius is pioneering a transformative era in cloud computing, aimed at empowering the global AI economy. We provide innovative tools and resources that enable our clients to tackle real-world challenges and revolutionize industries without incurring significant infrastructure expenses or the necessity of establishing large in-house AI/ML teams. Our team operates at the forefront of AI cloud infrastructure, collaborating with some of the most knowledgeable and inventive leaders and engineers in the industry.Our Work EnvironmentHeadquartered in Amsterdam and publicly traded on Nasdaq, Nebius boasts a global presence with R&D centers across Europe, North America, and Israel. Our workforce of over 1,400 includes more than 400 proficient engineers, all possessing extensive expertise in both hardware and software engineering, complemented by an in-house AI R&D team.About Token FactoryToken Factory is dedicated to developing a cutting-edge platform that empowers companies to effortlessly integrate AI into their products and operational workflows. Our vision is to establish a robust, open, and scalable alternative for deploying and managing AI systems, thereby enhancing accessibility to advanced AI infrastructure for both burgeoning startups and established enterprises.We collaborate with a diverse clientele, ranging from AI-first organizations to renowned technology firms, assisting them in managing AI workloads reliably at scale. Our objective is to become the leading platform for high-performance AI inference, ensuring consistent latency, exceptional reliability, and the capacity to scale in response to demanding production requirements.Customer feedback is integral to our development approach; our iterative process is closely aligned with practical use cases.

Join us at the forefront of technological innovation, where we are revolutionizing the data storage landscape. At Pure Storage, you will be part of a dynamic team that thrives on creativity and intelligence, shaping the future of the industry.If you are ready to embrace limitless possibilities and make a significant impact, we invite you to be a part of our journey.ABOUT THE ROLEThe FlashBlade Self-Service Upgrades (SSU) team is pivotal in enhancing the upgrade experience for customers using Pure Storage’s FlashBlade platform. We develop robust backend services and APIs that facilitate seamless and secure software upgrades across various environments, ensuring client confidence.This position encompasses the entire backend system lifecycle, from design and implementation to deployment and ongoing maintenance, while prioritizing scalability and performance across extensive fleets. Additionally, the role aims to enhance delivery speed and quality through CI/CD practices, automation, and engineering standards that minimize manual interventions and defects.WHAT YOU’LL DOTake full ownership of features from concept through to deployment.Collaborate with cross-functional teams and product management to deliver solutions that meet customer requirements.Contribute to the technical vision by representing the team in engineering discussions and sharing your expertise.Analyze and resolve complex technical challenges while upholding high-quality standards.Deliver solutions with a customer-centric focus and foster a culture of continuous learning and team support.Please note that this is primarily an in-office role, and you will be expected to work from our Prague office.

Why Join Nebius?Nebius is at the forefront of a revolutionary shift in cloud computing, empowered to drive the global AI economy. We craft innovative tools and resources that enable our clients to tackle real-world challenges and revolutionize their industries, all without incurring hefty infrastructure costs or the necessity of assembling large internal AI/ML teams. Our team operates at the cutting edge of AI cloud infrastructure, collaborating with some of the most seasoned and imaginative leaders and engineers in the industry.Our Work EnvironmentHeadquartered in Amsterdam and publicly listed on Nasdaq, Nebius boasts a global presence with research and development hubs throughout Europe, North America, and Israel. Our diverse team of over 1,400 employees includes more than 400 highly skilled engineers with extensive expertise in both hardware and software engineering, complemented by a dedicated in-house AI research and development team.The RoleWe are seeking a Senior Backend Engineer to become a vital part of our Storage Virtualization Team, contributing to the development of a distributed, fault-tolerant storage system for Nebius’ hyperscaler cloud. You will be engaged in the creation of high-performance block and filesystem storage solutions that provide sub-millisecond latency, millions of IOPS, and terabytes per second of throughput, even amidst hardware failures. Your Responsibilities:Virtualization: virtio-blk and virtio-fs, QEMU and vhost-user, optimization of performance-critical I/O paths.Networking: high-throughput VM-to-storage transport utilizing TCP and RoCEv2 (RDMA).Storage systems: handling replication, consensus, self-healing, and data migration. What We Are Looking For:6+ years of professional software engineering experience.Expertise in C++ programming.A solid grasp of algorithms and data structures.Basic understanding of operating system internals (I/O, memory, scheduling).Proven ability to write reliable, maintainable code and debug complex systems.A collaborative mindset with fluency in English.Coding interviews are part of our hiring process.

Join Our Dynamic Real-Time Engineering Team!We are on the lookout for exceptional Senior Software Engineers to amplify our capabilities. At Cint, our Real-Time Engineering team is a collective of highly skilled individuals who thrive on tackling challenging projects. We pride ourselves on our extensive experience in designing and implementing complex systems that effectively manage unusually high traffic volumes. Our team culture fosters support and collaboration, ensuring every member feels valued. We believe in not just working together but also enjoying social interactions, making our workplace vibrant and enjoyable.Your Role and ResponsibilitiesAs a key member of our results-driven team, you'll find that our focus is purely on product quality and timely delivery. We eliminate workplace politics and distractions, prioritizing the code that directly impacts millions of users daily. You’ll collaborate with other top-notch engineers, ensuring that we collectively deliver a world-class product. The stakes are high; each error or downtime could result in significant financial loss.