Senior AI Infrastructure Engineer

Intercom builds AI-powered customer service tools for businesses worldwide. Our flagship AI agent, Fin, helps companies deliver responsive support at any hour. Combined with our Helpdesk, these tools form the Intercom Customer Service Suite, which blends AI automation with human expertise for more complex questions. Since 2011, nearly 30,000 businesses have relied on Intercom to improve their customer experience. Our team values fast iteration, continuous learning, and delivering real value to clients. Role overview Intercom is hiring Senior AI Infrastructure Engineers in Berlin to design and scale the systems behind our next generation of AI products. The AI Infrastructure team works across the stack, from GPU-level programming to the user-facing agents that handle millions of support conversations each month. This group builds and maintains training pipelines and inference systems for custom models like Fin Apex, which are central to our AI offerings. Collaboration with a tight-knit, highly skilled team is part of the role. What you will do Develop and scale training pipelines for large transformer and LLM models, including data ingestion, preprocessing, distributed training, and evaluation. Build and optimize inference services for low-latency, reliable customer experiences, covering autoscaling, request routing, and fallback mechanisms. Improve GPU-level performance by tuning kernels, increasing utilization, and identifying bottlenecks across both training and inference stacks. Work closely with machine learning scientists to implement new training and inference techniques. What we look for Demonstrated experience in model training or inference at scale, with strong skills in low-level GPU programming (such as CUDA or Triton). Experience across multiple areas is a bonus.

Intercom, based in Berlin, Germany, builds AI-powered tools that help businesses deliver customer service at scale. Nearly 30,000 companies worldwide rely on Intercom’s products, including Fin, an AI agent that handles customer queries around the clock. When integrated with Intercom’s Helpdesk, Fin becomes part of a broader suite designed to support both automated and human-assisted service. About the Role The AI Models Infrastructure Team sits within Intercom’s AI Group. As Engineering Manager, lead a team focused on designing and maintaining the infrastructure that powers Intercom’s AI models. This work is central to how Intercom’s AI capabilities evolve and scale. What You Will Do Guide a team of engineers responsible for building and supporting the systems behind Intercom’s AI models. Apply technical expertise to help the team navigate a fast-changing field. Foster a culture of continuous technical learning and growth. Collaborate with other teams to ensure the AI infrastructure meets product needs. What You Bring Strong technical background in AI or related fields. Experience leading engineering teams. Commitment to staying current with new developments in AI infrastructure. Learn More Explore Intercom’s engineering culture: intercom.engineering Read about Fin: fin.ai

About Langfuse Langfuse builds an open-source LLM Engineering Platform that helps teams develop AI applications. The platform includes tools for tracing, evaluation, and prompt management. As part of ClickHouse, Langfuse focuses on improving AI observability with a strong data-driven approach. Langfuse is the largest open-source solution in its field. The platform is trusted by 19 of the Fortune 50, has over 2,000 customers, and handles more than 26 million SDK downloads each month. The infrastructure processes over a billion trace events monthly, supporting high reliability and performance for clients. Role Overview: Senior Cloud Infrastructure Engineer This position focuses on maintaining and improving the cloud infrastructure that supports Langfuse’s services. The role involves managing operations on AWS ECS Fargate and ClickHouse Cloud, with attention to performance and cost efficiency. The Senior Cloud Infrastructure Engineer will help scale systems to match customer growth. In addition to cloud operations, the role covers public self-hosted infrastructure, giving teams flexibility in how they deploy Langfuse. Location Remote within Europe.

Join praxipal, where we're revolutionizing healthcare administration with our AI-powered workforce, tackling the global shortage of medical staff.We believe that medical assistants should focus on patient care rather than mundane tasks like scheduling, messaging, or invoicing. Enter Luna, our AI receptionist, who automates communication and is already embraced by over 100 medical practices.As we expand Luna's capabilities to manage all aspects of patient communication, we're on a mission to streamline administrative processes directly within existing practice systems.Backed by one of Europe’s leading investors and recognized as one of Germany's fastest-growing healthtech startups, our team comprises talents from renowned organizations such as Palantir, Amazon, and SAP.We are currently seeking a Senior Software Engineer (Infra & Platform) to construct the reliable, secure, and scalable infrastructure that powers Luna.The RoleLuna operates in real-time, automating critical workflows involving sensitive patient data. Therefore, reliability, latency, and security are not just goals; they are essential features of our product.In this hands-on, technical role, you will establish and maintain the platform that ensures Luna's reliability in daily practice operations. This includes managing cloud infrastructure, CI/CD processes, identity and access management, observability, and Luna’s real-time voice stack. Your work will help minimize risks, streamline deployments, facilitate quick failure diagnostics, and embed security as a core principle.This position is on-site in Berlin and requires fluency in German.

About the RoleWe are on the lookout for two highly skilled backend engineers to join our dynamic team in Berlin. You will be instrumental in advancing the development and implementation of our technology, enhancing our capacity to create core backend functionalities, and empowering other teams to utilize this backend for their projects.If you have a passion for creating exceptional products, thrive in a fast-paced environment, and are eager to contribute to the success of an ambitious startup, this is the perfect opportunity for you.Our Tech Stack:Python / FastAPIPostgreSQL / MongoDB / ElasticCloud LLM providers + bare metal GPUsGCPAs an early team member, you will assume significant responsibilities from day one, with the chance to influence our technological architecture and infrastructure.Join one of the most ambitious AI companies today, collaborating with a world-class team of experts in their fields, and experience an incredibly stimulating work environment. In This Role You WillLead the delivery of complex projects, coordinating with cross-functional teams, and ensuring timely completion of essential components.Develop a deep understanding of Reliant's vision and integrate this into your architectural and process decisions in daily operations.Offer insights to refine UI/UX concepts and assist in the planning of backend and infrastructure development.Take proactive responsibility for long-term code quality and architecture. About YouThe ideal candidate will have a proven track record in backend or full-stack development, with a focus on rapid innovation and effective systems design that supports growth opportunities for both the product and the team.To thrive in this role, you should possess the following skills and experiences:5+ years of demonstrated experience in building backend services or distributed systems.Ability to design, develop, test, and maintain backend services and APIs that support product features, including writing robust, production-quality code.Engage in system and service design; contribute to architectural discussions and make informed trade-offs regarding scalability, latency, cost, and reliability.Navigate ambiguity effectively; translate vague or high-level requirements into actionable implementation plans.Collaborate with cross-functional partners including product management, frontend, UX, data, and operations to define requirements, plan implementations, and deliver features.Ensure high code quality by writing, reviewing, and improving unit/integration tests; actively participate in code reviews.

Join our dynamic team at Contentful as a Senior Software Engineer specializing in Backend & Infrastructure. In this pivotal role, you will design and implement robust backend systems that power our content platform. Collaborate with cross-functional teams to enhance our infrastructure, driving innovation and efficiency in our development processes.

Join Mirelo AI, where we are pioneering the future of creative tools by transforming silent video content into immersive sound, speech, and music.Our team is at the forefront of developing advanced generative AI models that bring life to video content, enabling creators across gaming and video platforms to enhance their storytelling. Recently, we secured a strong $41 million Seed funding round, led by prestigious firms including Andreessen Horowitz and Index Ventures, propelling our rapid expansion in Product, Engineering, Go-to-Market, and Growth.About the RoleAs a Training Infrastructure Engineer, you will play a crucial role in optimizing our training stack. Your responsibilities will include profiling GPU behavior, debugging training pipelines, enhancing throughput, selecting optimal parallelism strategies, and building robust infrastructure for efficient model training at scale. You will collaborate on cluster management, model training, and the development of efficient data pipelines for video and audio processing.

Role overview repriskag is hiring a Senior AI Engineer based in Berlin. This position centers on designing and building advanced AI solutions aimed at solving complex problems in a range of industries. The work requires a strong technical background and a creative approach to applying AI methods. Collaboration is central to this role. The Senior AI Engineer will work closely with engineers and researchers, sharing ideas and exploring new directions in AI technology. The team values open communication and a willingness to tackle novel challenges together. What you will do Design and implement AI solutions for diverse industry problems Collaborate with engineers and researchers to develop new AI approaches Contribute to discussions on emerging AI technologies and their practical applications Location This role is based in Berlin.

About the Role Join bluefishai as a Senior AI Engineer and take the lead in developing cutting-edge LLM-powered products that redefine marketing and advertising technologies. Your expertise in machine learning, large language models, and natural language processing will be crucial as you design, implement, and enhance our suite of AI-driven solutions. In this pivotal role, you will oversee the LLM technology stack that is central to our product offerings. Collaborate with cross-functional teams, including application engineers, product managers, and designers, to create innovative solutions that yield significant business results. This position offers a unique opportunity to influence the future of AI-driven technologies and contribute to impactful real-world applications. While this role is associated with our Berlin office, we support hybrid or fully remote work arrangements for candidates located within Germany.

Your ResponsibilitiesTake ownership of the backend systems that facilitate thousands of hotel bookings every day.Architect, develop, and maintain our core booking infrastructure, ensuring robust integrations with PMS platforms, channel managers, and payment processors.Establish and uphold a resilient API layer that supports our React frontend operations.Elevate the engineering standards through effective system design, transparent communication, and strong technical leadership.Collaborate closely with the founders to influence the long-term architecture and foster a culture of engineering excellence.

Join GetYourGuide as a Senior AI Enablement Engineer, where you will leverage your expertise in artificial intelligence to enhance our product offerings. In this pivotal role, you will collaborate with cross-functional teams, driving the integration of AI technologies into our platforms, ultimately enhancing user experience and operational efficiency.Your contributions will shape the future of travel experiences, directly impacting how customers interact with our services. If you are passionate about AI and ready to make a significant impact in a dynamic environment, we want to hear from you!

At SumUp, our mission is to empower small businesses by providing them with accessible and user-friendly tools for payments, finance, and customer relationships. We are a dynamic team grounded in our core values: Founder’s Mentality, Team First, and We Care. We foster an organization that is people-oriented, disciplined, and consistently innovating from within. Agility is at the heart of what we do, and we strive to create an environment that nurtures it. As part of our Global Operations team, you will play a pivotal role in enhancing the customer experience in fintech. The Senior AI/ML Engineer position is essential for the development and deployment of cutting-edge AI solutions that streamline support processes and significantly enhance the experience for our merchants and support agents. You will be a central figure in building and maintaining the ML infrastructure and tools that support our core products utilizing advanced AI/ML models. This role is vital for sustaining our growth, particularly as we expand complex applications such as our AI Assistant and translation tools.

P-1327 At Databricks, we are driven by a passion for empowering data teams to tackle some of the world’s most complex challenges. From revolutionizing transportation methods to speeding up medical innovations, our mission is to build and operate the leading data and AI infrastructure platform, enabling our customers to leverage profound data insights to enhance their business. Established by engineers, Databricks is embarking on an ambitious journey to develop the most advanced Lakehouse Platform. While we have a solid foundation, we aim to elevate our offerings to create significantly improved products. Our goal is to reimagine every component to provide our customers with the fastest, most user-friendly, and secure data platform for all their data workloads. As a Senior Software Engineer, you will be a key member of our Berlin site and play a pivotal role in our multi-year mission to realize our Lakehouse vision. You will engage in the entire development lifecycle and embody the core values of Databricks. The impact you will have: Our backend teams operate across various domains within our essential service platforms. You may encounter challenges such as: Addressing issues that encompass product development and infrastructure, including distributed systems, scalable service architecture, monitoring, workflow orchestration, and enhancing developer experience. Creating reliable, secure, and high-performance services and client libraries for managing and accessing massive amounts of data on cloud storage solutions, such as AWS S3, GCS, and Azure Blob Store. Developing product features that empower our customers to efficiently store and access their data.

Become a part of Voyfai, a rapidly expanding Series A startup redefining logistics and technology throughout Europe.Located in the vibrant city of Berlin, we are at the heart of a diverse portfolio of companies engaging across multiple European markets.This is an exceptional opportunity to take the reins from the outset, create significant impact, and develop your career in an agile, fast-moving atmosphere. Whether you’re optimizing processes, formulating strategies, or spearheading initiatives, your efforts will directly contribute to the success of Voyfai and the enterprises we empower. If you have a passion for building innovative solutions and wish to join a rising star, we encourage you to reach out!Your RoleAs a Senior AI Engineer at Voyfai, you will be instrumental in crafting, developing, and scaling LLM-driven and applied GenAI systems that enhance our main offerings. You will collaborate closely with Product, Engineering, and Business teams to convert complex, unstructured challenges into effective, production-ready AI solutions.This role is hands-on and focused on delivering tangible results. You will take full ownership from identifying use cases and designing prompts or models to deploying, monitoring, and continuously improving systems in production, with a strong emphasis on real-world reliability and business outcomes.Key Responsibilities:Design, develop, and implement LLM-driven and GenAI features for impactful, real-world applications.Build and manage end-to-end GenAI pipelines, encompassing prompt design, model selection or fine-tuning, evaluation, and deployment.Integrate foundational models into production systems, prioritizing latency, cost-efficiency, reliability, and quality.Collaborate with Product Managers and Engineers to convert vague business challenges into scalable AI solutions.Oversee production AI systems, including monitoring, evaluation, guardrails, and feedback mechanisms.Contribute to architectural choices regarding AI platforms, retrieval systems, vector databases, and LLMOps tooling.Elevate the technical standard through code quality, documentation, and mentorship.What You Bring:Several years of experience as an AI Engineer, Machine Learning Engineer, or in a related role, with a hands-on focus on LLMs and applied GenAI in operational environments.Strong grasp of LLM behavior, prompting techniques, evaluation strategies, and common failure modes.Proven track record of successfully implementing AI solutions that drive business value.

Join the Scout24 Team!Scout24, the proud home of ImmoScout24, has been at the forefront of transforming the real estate market in Germany and Austria for over 25 years. Our mission is to create a digital ecosystem that connects homeowners, seekers, and agents seamlessly. We understand that finding the perfect home is one of life's pivotal decisions—just like choosing your career! #WorkingatScout24 means being part of a vibrant and inclusive team composed of approximately 1,100 professionals from 58 different nationalities. We celebrate diversity and individuality while fostering a culture of openness and authenticity that enables personal growth and learning. We believe that mistakes are opportunities for innovation and growth. Together, we take proactive steps towards improvement, embracing responsibility, and engaging in respectful discussions about our successes and challenges because we are #oneteam.If this resonates with you, we would be thrilled to have you on board! Even if you don’t meet every requirement, we welcome the unique value you can bring to our team. Grow with us!Beyond our supportive culture, we offer an array of fantastic benefits that make Scout24 a remarkable workplace!

At Intercom, we revolutionize customer service with our cutting-edge AI technology. Our mission is to empower businesses to deliver exceptional customer experiences.Our AI agent, Fin, stands as the most sophisticated customer service AI on the market, enabling businesses to provide round-the-clock, flawless service. Fin integrates seamlessly with our Helpdesk, forming the comprehensive Intercom Customer Service Suite, designed to enhance support for complex inquiries that necessitate human intervention.Since our inception in 2011, we have gained the trust of nearly 30,000 businesses globally, establishing a new benchmark in customer service. Our core values drive us to innovate, operate with urgency, and consistently provide exceptional value to our clients.We are excited to build our presence in Berlin, a city known for its unique mix of top-tier technical talent and vibrant creative culture. This dynamic, globally connected metropolis is conveniently located near our R&D facilities in Dublin and London, making it an ideal hub for ambitious product development.This year, we aim to recruit 100 talented individuals in Berlin across various domains, including engineering, AI, data science, product management, and design. This is an extraordinary opportunity to join us as we lay the groundwork for our R&D efforts in the region and make a significant impact as we develop the leading customer service AI!What’s the opportunity?We are in search of Senior Product Engineers to become part of our AI Infrastructure team, dedicated to building AI-driven products at Intercom. As a Product Engineer in AI Infrastructure, you will collaborate closely with ML engineers and ML scientists to thoroughly understand our products and tech stack, and identify ways to expedite our development processes.The broader AI team is responsible for conceptualizing new ML features, exploring effective algorithms and technologies, and swiftly deploying prototypes for our customers.Our AI infrastructure is designed to adapt rapidly to new advancements in AI, ensuring that our engineers can deliver high-quality services promptly while maintaining the safety and reliability of our systems.We are passionate about leveraging machine learning technology, from classic supervised models to innovative unsupervised clustering algorithms, and pioneering new applications.

We are seeking a highly skilled Senior Civil Engineer specializing in infrastructure and energy projects to join our dynamic team at dreessommerse. In this role, you will lead engineering initiatives, ensuring compliance with industry standards while delivering innovative solutions for our clients. Your expertise will contribute to the successful execution of various large-scale projects, driving both technical excellence and project efficiency.

Intercom builds tools that help businesses deliver better customer service, powered by artificial intelligence. Nearly 30,000 companies worldwide use Intercom’s products, including Fin, an AI customer service agent that works seamlessly with the Intercom Helpdesk as part of the Customer Service Suite. Since 2011, Intercom has focused on innovation and delivering value for clients. Role overview The AI Models Infrastructure Team within Intercom’s AI Group develops and maintains the core infrastructure that supports the company’s proprietary AI models. Intercom is hiring an Engineering Manager to lead this team. This is a technical leadership position working at the intersection of infrastructure and artificial intelligence. What you will do Guide a team of engineers building and operating the infrastructure for Intercom’s AI models Work closely with other teams to ensure the reliability and scalability of AI systems Support ongoing technical growth within the team and stay current with advances in AI Who we’re looking for Experience managing technical teams, ideally in AI or related fields Strong background in infrastructure or platform engineering Commitment to continuous technical development Locations Berlin, Germany Dublin, Ireland London, England Learn more About engineering at Intercom: https://intercom.engineering About Fin: http://fin.ai

Join our innovative team at akirolabs as a Senior AI Engineer, where you'll play a crucial role in designing and implementing cutting-edge artificial intelligence solutions. We are looking for a passionate individual who thrives in a dynamic environment and is ready to take on challenging projects that push the boundaries of technology.

Join Arbio, a pioneering AI-driven hospitality company, and be part of our mission to revolutionize short-term rentals across Europe.At Arbio, we leverage cutting-edge technology to enhance efficiency, elevate guest experiences, and streamline operations in the short-term rental sector. Our rapidly growing team is dedicated to shaping the future of hospitality with innovative AI solutions, all while fostering a culture of performance and accountability. Come aboard and help us lead the industry into a new era of growth and innovation.As a Senior AI Engineer, you will be instrumental in developing the intelligence framework that underpins our operations, from property management to guest services. We are focused on creating advanced Retrieval-Augmented Generation (RAG) systems that convert disparate data into immediate, actionable insights, empowering our teams to provide world-class guest experiences.Your contributions will include:Designing high-performance RAG pipelines utilizing MongoDB Vector DB for rapid semantic search capabilities.Building agent workflows based on LangChain for complex reasoning tasks.Integrating various LLM providers such as Claude, OpenAI, and Gemini.Writing maintainable and scalable TypeScript code to facilitate our growth.Monitoring and optimizing using LangSmith and other LLMOps tools.Collaborating with a dynamic, agile team to push the boundaries of AI in the hospitality field.