Senior Software Engineer at RTB House | Warsaw, Poland

Location: Poland About Us: RTB House is an innovative global leader in marketing technology, dedicated to developing cutting-edge solutions for esteemed brands and agencies around the globe. Our unique ad-buying engine, driven entirely by advanced Deep Learning algorithms, empowers advertisers to achieve remarkable results and meet their objectives across al…

Join Nordsec as a Mid-Senior Site Reliability Engineer in Warsaw, where you'll play a pivotal role in ensuring the reliability and performance of our systems. You will collaborate with cross-functional teams to enhance our infrastructure and optimize our deployment processes.In this role, you will be responsible for designing and implementing robust systems, automating processes, and monitoring our production environments.

CoreWeave is The Essential Cloud for AI™. Designed for visionaries by visionaries, CoreWeave provides a cutting-edge platform equipped with technology, tools, and teams that empower innovators to confidently build and scale AI solutions. Our infrastructure is trusted by top AI labs, startups, and major global enterprises, merging exceptional infrastructure performance with profound technical expertise to accelerate breakthroughs and transform compute into capability. Founded in 2017, we proudly became a publicly traded entity (Nasdaq: CRWV) in March 2025. Discover more at www.coreweave.com.We take pride in being a Living Wage accredited Employer.Please note that this is a 24/7/365 team. Your shift (8 hours) will be between 7AM - 7PM local time.What You’ll Do:The Customer Experience (CX) Organization at CoreWeave is committed to ensuring that every client leveraging AI workloads at scale enjoys a seamless, reliable, and high-performance experience. This team supports the infrastructure that drives the AI revolution—engaging with data centers, hardware systems, and customer workloads to uphold the integrity of our cloud platform. The CX organization collaborates closely with both internal and customer engineering teams, providing valuable insights from the field and the opportunity to contribute to the CoreWeave product roadmap and development.About the Role:As a Senior Cloud Support Engineer at CoreWeave, you will find yourself at the forefront of a technological revolution, empowering our customers to unlock the full potential of our advanced Kubernetes-powered HPC cloud infrastructure. You will engage hands-on, working alongside engineers and researchers to tackle issues affecting high-profile, mission-critical applications and pioneering AI training workloads. Your contributions will play a crucial role in ensuring outstanding performance, reliability, and success for our clients, placing you at the core of transformative technologies that are reshaping industries worldwide.In this role, you will:Guide and mentor team members in enhancing their technical skills and troubleshooting capabilities across all disciplines supported by CoreWeave.Provide...

As a Lead Senior Software Engineer on the API team at Nearmap, you will take charge of guiding developers in the design, implementation, and delivery of innovative software solutions that significantly contribute to Nearmap's business goals and effectively address real-world challenges faced by our users. You will collaborate closely with the Product team to analyze, design, and enhance software solutions while elevating the development team's skills by promoting best practices and providing coaching to help individuals reach their full potential.Your work will directly impact a platform that manages petabytes of aerial imagery, drives sophisticated AI models, and delivers real-time geospatial insights to clients globally. From data ingestion and processing to intelligent API delivery and user-facing applications, our systems redefine performance, scalability, and innovation.This role presents a unique opportunity to influence quality practices across a comprehensive platform that encompasses high-resolution imagery, AI-driven insights, and scalable data delivery systems while helping to establish API projects within our new engineering hub in Warsaw. You will play a vital role in ensuring the dependability of systems that are transforming how industries make pivotal decisions at scale.At Nearmap, we seek engineers who are adaptable, exhibit leadership qualities, and are eager to tackle new challenges across the full stack as we strive to advance technology.

Join our innovative project aimed at transforming business processes through the power of artificial intelligence and cutting-edge technology. This initiative focuses on intelligent data management and facilitates automated decision-making, leveraging modern, high-performance solutions to ensure optimal efficiency, robust security, and seamless scalability.

Welcome to the positive side of technology! You might recognize us by our previous name: Znany Lekarz. It all began over a decade ago when we posed a crucial question: is anyone in healthcare genuinely considering the needs of patients? We took action, empowering patients with the ability to leave and read reviews about their healthcare experiences. Simultaneously, we equipped doctors with innovative tools to streamline booking management, enabling them to focus on what truly matters: patient care. Today, we invite you to join us in our mission to humanize the healthcare experience.Docplanner: A Global LeaderWe proudly operate in 13 countries, with over 90 million patients relying on our services every month. More than 300,000 specialists trust our platform, backed by leading venture capital firms like Point Nine Capital, Goldman Sachs Asset Management, and One Peak Partners. Despite employing over 2,500 individuals worldwide, we maintain the innovative spirit of a startup that we began with over a decade ago.Docplanner Tech: Shaping the FutureAt Docplanner Tech, we are a diverse team of over 400 professionals in Engineering, Data, and Product teams, dedicated to creating our product for all our locations. Many team members have been with us for over five years, and we always welcome new colleagues with warmth and enthusiasm.While we could share more about ourselves, we encourage you to check our Glassdoor reviews to hear firsthand experiences. If you want to understand what it's like to be your true self at work, watch this video.Why Join Us?It's fulfilling to share with family and friends how your work contributes to making the world a better place. You’ll rest easy knowing that your efforts matter and that your skills resonate with your values.Our goal is to enhance the healthcare experience, and this journey begins with you being authentically yourself. We believe that embracing the diversity of human experiences leads to a better healthcare journey for everyone. We don’t just acknowledge our differences; we celebrate them. We encourage you to bring your whole self to work, including the choice to work remotely, as we are fully remote-friendly.

We are seeking an experienced Senior Backend Engineer to become a vital member of our dynamic, cross-functional product teams. This role demands extensive technical expertise, exceptional communication abilities, and a proactive, collaborative approach. The successful candidate will be deeply involved in ongoing client projects and seamlessly integrated into our established workflows.

Join our innovative team at Aurora Solar as a Senior Software Engineer. In this role, you will help drive our mission to revolutionize solar energy solutions on a global scale. Your expertise will contribute to developing cutting-edge software that empowers solar professionals and enhances efficiency in solar project management.As a key player in our engineering team, you will work collaboratively with cross-functional teams to design, implement, and optimize software solutions that meet the needs of our international clientele. Your contributions will directly impact the future of renewable energy technology.

Join our innovative team at Box Inc. as a Senior Staff Architect in Workflow Engineering, where your expertise will lead the design and implementation of cutting-edge workflow solutions. You will collaborate with cross-functional teams to enhance our platform, ensuring scalability, performance, and optimal user experience. This role presents a unique opportunity to influence product direction and contribute to the overall success of our engineering initiatives.

Join HelloFresh in Warsaw as part of our HelloTech organization, a vital segment of our global technology team comprising over 1000 professionals. We are dedicated to developing digital products that enhance the end-to-end food experience, encompassing meal kits, ready-to-eat meals, and even specialty items like pet food and premium meat & seafood. Our technology platforms empower millions of customers with personalized food solutions every month.Our direct-to-consumer subscription model is fueled by cutting-edge technology that optimizes every customer interaction—from engaging applications and personalization algorithms to pricing strategies and supply chain management. Although our brands operate independently to cater to diverse customer needs, they are unified by shared platforms, data, and operational excellence crafted by HelloTech.At HelloTech, we work in autonomous, cross-functional teams that take ownership of specific products and domains. By collaborating with our Warsaw office, you will contribute to scalable, data-driven products used across various markets, leveraging a modern tech stack and working with international teams to continuously enhance how our customers discover, order, and enjoy HelloFresh products now and in the future.

Join our dynamic team at Inetum2 as a Senior Fullstack Software Engineer, where you'll be at the forefront of developing innovative software solutions. In this role, you will leverage your expertise in both frontend and backend technologies to build scalable applications that enhance user experience. Collaborate with cross-functional teams to design, develop, and maintain high-quality software products.

Join our dynamic team at inetum2 as a Senior Software Quality Assurance Engineer, where you will play a crucial role in ensuring the quality and performance of our software solutions. You will be responsible for developing and executing test plans, identifying bugs, and working collaboratively with developers to enhance product quality.

Join our dynamic team at Box, Inc. as a Senior Software Engineer specializing in Home Web applications. In this role, you will leverage your extensive experience in software development to design and implement innovative solutions that enhance user experiences. Collaborate closely with cross-functional teams to deliver high-quality software solutions that align with our strategic goals.

Join the forefront of digital privacy with Nordsec!Are you a passionate and innovative software engineer ready to tackle complex challenges? Become a pivotal part of our dynamic team responsible for developing cutting-edge technologies such as Threat Protection Pro, the NordLynx protocol, and the world’s fastest VPN. Your contributions will empower millions of users to reclaim control over their online security, privacy, and data.

Join our dynamic ML Platform team at Bolt as a Senior ML Platform Engineer, where you will play a pivotal role in designing, developing, and optimizing our AI Infrastructure. This infrastructure powers Bolt's intelligent services, making machine learning and artificial intelligence easier to implement at scale.We are a rapidly growing tech company with over 200 million customers across more than 50 countries. Our mission is to create cities that prioritize people over cars, and we believe an inclusive environment is key to achieving this goal. We welcome applicants from all backgrounds and walks of life.

Join Turnitin as a Senior Fullstack/Backend Software Engineer, where your expertise in backend development, particularly with Java and serverless architectures, will be pivotal. We are seeking engineers who are enthusiastic about creating scalable distributed systems and delivering robust software solutions for our acclaimed educational platform.As an integral member of our shared services team, you'll spearhead the development and enhancement of the core systems supporting both our existing and upcoming applications.Key Responsibilities:Architect, develop, and optimize scalable backend services utilizing Java and serverless technologies (AWS Lambda).Design and implement RESTful APIs and event-driven architectures.Contribute to frontend component development as required.Enhance performance and cost-effectiveness of existing services.Collaborate with cross-functional teams, including Architects, Product Managers, and engineering leads, to deliver innovative solutions.Mentor junior developers and promote best practices.Establish and manage CI/CD pipelines.Maintain high-quality coding standards through peer reviews, automated testing, and compliance with development best practices.Document shared components comprehensively, providing usage guidelines and examples.

Join the forefront of online privacy and security with the world's most advanced VPN.At NordVPN, we're on a mission to empower individuals with privacy and control over their online presence. If you are a driven problem-solver with a passion for technology, join our innovative team behind Threat Protection Pro and the NordLynx protocol—tools designed to ensure fast, secure, and reliable internet access.Your Role: As a Senior Site Reliability Engineer with a focus on observability, you'll play a pivotal role in enhancing our monitoring systems. Your efforts will improve signal quality, reduce alert fatigue, and collaborate closely with data teams on anomaly detection, ultimately leading to a deeper understanding of our distributed systems' health and behavior.

Join the forefront of online security technology with the world’s leading VPN provider!Are you a passionate problem-solver eager to make impactful contributions? Become a key player in the team behind Threat Protection Pro, the NordLynx protocol, and the fastest VPN globally—tools designed to restore privacy, security, and user control.Your role? Empower millions to reclaim their online security, privacy, and data integrity.As a Senior Backend Engineer on our Notification Center Team, you’ll be vital in designing and maintaining the microservices that facilitate seamless in-app notification delivery. We take pride in being the backbone of numerous features that depend on these notifications for smooth functionality. Our collaborative spirit drives us to work closely with other teams at Nord to pave the way for a scalable future.Ready to tackle the challenges of scalability, code quality, and service stability? Join our team of skilled engineers dedicated to technical excellence and help shape the future of NordVPN and its associated products!

Join Moss, where we empower finance professionals to automate their workflows and make strategic decisions.Our unique culture is centered around impact and growth, fostering an environment where each team member is encouraged to learn and succeed. Recognized by Sifted’s Rising 100 and LinkedIn's Top Startups, we aim to advance your career while making Moss a lasting success.Our Engineering teams are looking for talented Senior Backend Engineers (f/m/d) to join various teams in Warsaw. Open positions include:Sales EnablementPricing & BillingAcquisitionSpend ManagementActivation & Card SpendIn this role, you will collaborate closely with designers, product managers, and frontend engineers to bring innovative ideas to fruition, ensuring our product provides intuitive and efficient tools for business automation and simplification.

Join our innovative team as a Senior Software Engineer focused on transforming business processes through cutting-edge artificial intelligence and advanced technologies. This project is dedicated to optimizing intelligent data handling and facilitating automated decision-making, utilizing modern, high-performance solutions that guarantee efficiency, security, and scalability.