AI Research Engineer - Specialized in Reinforcement Learning

About UsHelsing is pioneering the integration of artificial intelligence in defense systems. Our core mission is to safeguard democratic values by providing technological advancements that empower societies to make autonomous decisions and uphold ethical standards.As advocates for democracy, we recognize our unique responsibility to approach the development …

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.

Join Us in Shaping the Future of Finance!Trade Republic Bank is redefining the way Europe saves and invests. As the leading savings platform operating across 18 countries, we proudly serve over 10 million customers with more than €150 billion in assets. Our mission is to empower everyone with simple, safe, and free access to financial systems, allowing individuals to build their wealth. At Trade Republic, you'll collaborate with exceptional talent and cutting-edge technology to make a lasting impact on millions of lives.Your Role as a Senior Platform EngineerAs a key member of our Platform Engineering team, you will play a vital role in enhancing our self-service platforms, enabling our product engineers to deliver robust solutions swiftly. You'll be instrumental in encapsulating complexity and providing the tools that empower millions to invest, trade, and save effectively.Platform Development: Create in-house provisioning and lifecycle management services in Go, ensuring seamless integration with our infrastructure and delivering golden-path templates in our internal developer platform (IDP).Enhancing Developer Efficiency: Equip teams to rapidly deploy production services, track essential developer metrics, and refine our platform based on insights, significantly reducing cycle times.Ensuring Resilience at Scale: Establish and monitor service-level objectives (SLOs), analyze burn rates, and lead automated safety measures while continuously enhancing platform performance through thorough testing.Platform Ownership: Collaborate with product managers to craft a comprehensive roadmap, balancing user needs, cost, latency, and developer experience, while effectively communicating technical trade-offs to leadership.

About UsHelsing is a pioneering defense AI company dedicated to safeguarding democracies. Our mission is to achieve technological leadership, ensuring that open societies can maintain sovereignty over their decisions and ethical standards.As advocates for democratic values, we recognize our profound responsibility in the thoughtful advancement and application of transformative technologies like AI. We take this commitment seriously.Our team consists of passionate engineers, AI specialists, and customer-oriented program managers. We are on the lookout for mission-driven individuals to join our European teams and leverage their skills to tackle the most complex and impactful challenges. We foster an open and transparent culture that encourages healthy discussions about the utilization of technology in defense, its advantages, and its ethical considerations.The RoleAt Helsing, we are revolutionizing perception by developing foundational intelligence for the physical world. You will engage in researching, designing, and training large-scale Foundational Models that convert intricate multimodal sensor data into innovative autonomous capabilities.We are in search of an individual who operates at the nexus of AI Research and Machine Learning Engineering, possessing a proven background in LLM/VLM (multimodal) architectures. Your core responsibility will involve training and fine-tuning Vision-Language Models using our proprietary datasets to enhance our diverse product offerings. You will oversee the entire model lifecycle, from data curation and training to evaluation.

Forvis Mazars seeks a Senior Fullstack Engineer focused on cloud and artificial intelligence. This role is available in Berlin, Düsseldorf, Köln, and Leipzig. The position centers on building software that helps clients streamline their operations and support business growth. What you will do Design and develop scalable applications using cloud and AI technologies Collaborate with cross-functional teams to deliver dependable solutions Contribute to architectural planning and technical decisions Mentor and support junior developers within the team What to expect at Forvis Mazars This role values technical expertise and a strong problem-solving approach. Forvis Mazars encourages new ideas and collaboration, offering the opportunity to shape meaningful solutions with colleagues who are committed to innovation.

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.

Join our dynamic team as a Mid-Level Data Platform Engineer (m/f/d) and play a crucial role in building and maintaining the data infrastructure that drives Flix’s innovative mobility platform.At FlixTech, our cutting-edge data platform empowers teams across the organization to effectively process, analyze, and leverage vast amounts of mobility data. This infrastructure is vital for key functionalities such as network planning, pricing, operations, and business intelligence. You will develop scalable systems that handle millions of events daily, ensuring dependable data access for the entire organization.As part of a collaborative, cross-functional engineering team, you will work closely with data analysts, data scientists, and platform engineers. Your contributions will focus on establishing robust, scalable data systems that enhance data accessibility and efficiency for various teams.

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.

At Enpal, we are more than a company; we are a transformative movement. As a prominent greentech unicorn and one of Europe’s fastest-growing energy companies, we are committed to making solar energy accessible and effortless for homeowners across the continent. Our innovative approach to solar panels, heat pumps, home energy storage systems, and EV charging stations is revolutionizing the residential energy landscape. With our mission to empower homeowners to adopt clean energy solutions, we are paving the way for a sustainable and decentralized energy future.As a leader in the residential solar energy sector, Enpal is on an expansion trajectory with a clear vision: to be the key driver of Europe’s transition to sustainable and decentralized energy generation.Job OverviewWe are seeking an Engineering Manager who excels in product-centric environments, possesses a passion for end-to-end ownership of products or components, and has the capability to lead a team in delivering impactful solutions.Key ResponsibilitiesLead and develop a team of engineers, promoting collaboration and excellence.Oversee the entire lifecycle of a product or component—from design and development to deployment and optimization.Collaborate with product and design teams to shape the technical roadmap.Drive architectural and process improvements to ensure scalability, quality, and maintainability.Desired QualificationsProven engineering manager or strong engineer with hands-on leadership experience, demonstrating full ownership of products from conception to production in product-driven organizations.A strong end-to-end ownership mindset—taking products or major components from concept to production, managing the entire lifecycle.Hands-on technical proficiency with TypeScript, Node.js, Nest.js, React/Next.js, Terraform, Azure, and MongoDB/PostgreSQL.Fluent in English.A passion for joining a mission-driven, high-growth environment that is actively shaping the energy future.Technological StackTypeScript / Node.js / Nest.js / React / Next.js / Terraform / Azure / MongoDB / PostgreSQL / Azure Cosmos DB / Azure DevOps (CI/CD)Additional HighlightsJoin Germany’s pioneering green unicorn and play an active role in the solar energy transition with us.

Superhuman Platform Inc seeks a Data Engineer for its Berlin hub. This role centers on building and refining data solutions that help drive ongoing projects. The position involves close collaboration with multiple teams to keep data processes efficient, while upholding strong standards for data quality and accessibility. What you will do Design and implement data pipelines and systems to meet project requirements Collaborate with colleagues across departments to improve and streamline data workflows Monitor data integrity and maintain reliable data availability across various platforms Location This position is based in Berlin and operates within a hub model, encouraging in-person collaboration.

Join Our Team at Prior LabsPrior Labs is at the forefront of innovation, developing foundation models that comprehend tabular data—an essential component for both science and business. While foundation models have revolutionized text and images, structured data has largely been overlooked. We aim to seize this $600 billion opportunity to fundamentally transform how organizations interact with scientific, medical, financial, and business data.Our Achievements: We are a leading organization in structured data machine learning. Our groundbreaking TabPFN v2 model was featured in Nature, establishing a new benchmark for tabular machine learning. Since its launch, we have amplified our model capabilities over 20 times, garnered over 2.5 million downloads, and achieved 5,500+ stars on GitHub. Our rapid adoption rate is evident across both research and industry as we develop the next generation of tabular foundation models and commercialize them with leading enterprises in Europe and the US.About Our Team: We are a small yet select group of over 20 engineers and researchers, handpicked from a pool of 5,000 candidates. Our team members hail from esteemed organizations such as Google, Apple, Amazon, Microsoft, G-Research, Jane Street, Goldman Sachs, and CERN. We are led by the creators of TabPFN and are advised by world-renowned AI researchers, including Bernhard Schölkopf and Turing Award winner Yann LeCun. Learn more about our team here.What's Next: Supported by top-tier investors and experts from Hugging Face, DeepMind, and Silo AI, we're experiencing rapid growth. This is your chance to join us and help shape the future of structured data AI. Explore our manifesto.

At Intercom, we are revolutionizing customer service through innovative AI solutions, striving to empower businesses to deliver exceptional customer experiences.Our flagship AI agent, Fin, is the most advanced customer service AI available, enabling businesses to provide round-the-clock, flawless service and significantly enhance customer interactions. Fin seamlessly integrates with our Helpdesk, creating an all-encompassing solution known as the Intercom Customer Service Suite, designed to tackle complex queries that necessitate human intervention.Founded in 2011 and trusted by nearly 30,000 businesses worldwide, Intercom is setting a new benchmark for customer service. Our core values drive us to push boundaries, operate with speed, and deliver unparalleled value to our clients.We believe in the importance of speed, and Berlin epitomizes this with its unique combination of technical expertise and vibrant creative culture. It is a globally connected city, closely situated to our R&D hubs in Dublin and London, making it the ideal environment for top-tier technical talent to flourish and collaborate on ambitious projects.This year, we aim to expand our Berlin team by hiring 100 professionals in engineering, AI, data science, product, and design. Joining us now means becoming part of the foundational R&D team in this region, allowing you to leave a lasting impact as we develop the world's leading customer agent!What’s the opportunity?We are seeking Senior Product Engineers to join our AI Group, focusing on the development of Intercom’s AI-driven products. As a Product Engineer in machine learning, you will collaborate closely with our ML Scientists and product teams, gaining a deep understanding of our products, customer needs, and our ML tech stack.Your role will involve defining innovative ML features, researching suitable algorithms, and rapidly deploying prototypes to our customers. Our team is highly product-focused, working in partnership with Product and Design teams to expedite our production processes. Thanks to our dedicated engineering team, we frequently transition from successful offline tests to production within weeks.We are passionate about leveraging machine learning technology, having productized everything from classic supervised models to groundbreaking unsupervised clustering algorithms and transformative applications of transformer neural networks. We rigorously test and measure the real customer impact of every model we implement.

Role Overview bluefishai is searching for a Senior Staff Applied AI Engineer based in Berlin or working remotely within Germany. This senior technical leader will shape how artificial intelligence is adopted and scaled across the company. The position focuses on driving AI projects that improve developer productivity, streamline workflows, and grow product capabilities. What You Will Do Lead AI-driven initiatives from concept to implementation, targeting real business outcomes. Work directly with the VP of Engineering and partner with engineering, product, and leadership teams to identify and prioritize impactful AI use cases. Establish structure, standards, and clear processes to help teams use AI effectively and sustainably. Integrate AI solutions into software development workflows to help teams deliver faster and more efficiently. Evaluate new and emerging technologies, including advanced AI capabilities, and advise on their practical application for both products and internal operations. Mentor engineers across teams, define best practices, and support the adoption of AI to drive measurable improvements. What Makes This Role Unique bluefishai is at the early stage of its AI journey, with multiple teams exploring different approaches. This role offers the chance to bring clarity, consistency, and vision, helping set the foundation for scalable AI use across the company. Success depends on strong collaboration, influencing stakeholders, and aligning teams around solutions that deliver real results.

About UsAt Melotech, we are transforming the media and entertainment landscape by creating art through innovative technology. In just two years, our creations have captivated audiences for over 3 billion minutes globally. Founded by visionary entrepreneur Soheil Mirpour, we are financed by leading venture capitalists including Cherry Ventures, Speedinvest, and GFC, along with distinguished angel investors from esteemed firms such as Spotify, Blackstone, and KKR.Your RoleAs an AI/ML Engineer Intern, you will serve as the technical foundation of our content platform. You will confront essential challenges such as: How do we construct scalable ML systems that cater to millions while ensuring low latency? What is the most effective architecture for training and deploying models that can analyze cultural trends in real-time? How can we utilize state-of-the-art models to enhance the creative process without sacrificing quality? Working independently alongside our founder and team, your solutions will significantly impact our company's trajectory. Your day-to-day responsibilities will include:Building and deploying production-ready ML models within our content ecosystem.Designing scalable ML infrastructure and pipelines to manage extensive media datasets.Implementing inference systems for optimizing content across various sectors.Fine-tuning and deploying multimodal AI systems using best practices in MLOps.Collaborating with data science teams to transition research models into production systems.Optimizing model performance for cost efficiency while upholding accuracy and speed standards.Integrating ML features into existing platforms and developing APIs for seamless model access.Your ProfileYou are an aspiring ML engineer focused on production, adept at connecting advanced technology with scalable systems. Your strengths lie in establishing robust ML infrastructures that empower real-world applications at scale. You excel in dynamic environments where your technical choices significantly influence business results and user experiences. Your qualifications typically include:A degree in Computer Science, Machine Learning, Mathematics, Engineering, or a related technical field.3+ years of practical ML engineering experience, building production systems within major tech firms, high-growth startups, or media/entertainment platforms.Proficiency in programming languages such as Python and familiarity with ML frameworks like TensorFlow or PyTorch.Strong analytical and problem-solving skills alongside effective communication abilities.

Join Machine Learning Reply, a leader in transforming advanced AI technology into practical, scalable solutions for organizations. We are searching for an enthusiastic AI Application Engineer to help create AI-driven applications and intelligent features leveraging cutting-edge machine learning and generative AI technologies.As part of our innovative team, you'll focus on developing user-centric AI applications, translating AI capabilities into market-ready products.This role positions you at the nexus of AI engineering, backend development, product design, and cloud deployment, crafting production-ready AI systems that deliver significant business impact.Key Responsibilities:Design and develop AI-powered applications for enterprise clients, including digital assistants, AI copilots, semantic search systems, and intelligent automation solutions.Create applications powered by LLM and Retrieval-Augmented Generation (RAG) using the latest AI frameworks.Develop comprehensive AI products that integrate LLM APIs with enterprise data sources and backend services.Architect scalable AI microservices and APIs to embed AI functionalities into enterprise platforms.Implement vector search, embeddings pipelines, and knowledge retrieval systems.Rapidly prototype AI features and proofs-of-concept, transitioning them to production-grade systems.Collaborate with product managers, designers, AI engineers, and enterprise clients to create impactful AI solutions.Deploy AI systems on cloud platforms following modern DevOps practices.Ensure reliable, scalable, and observable AI services through CI/CD pipelines, monitoring, and containerized deployments.What We Offer:An open and collaborative environment within the global Reply network, allowing you to build next-generation AI applications.Interdisciplinary collaboration with teams comprising AI engineers, software developers, and data scientists across diverse industries such as Banking, Insurance, Automotive, and Retail.An active social program featuring paid training, conferences, communities of practice, hackathons, and Reply XChange.Monetary benefits including a mobility package, gym subsidies, insurance, and pension schemes.

Are you passionate about artificial intelligence and eager to contribute to cutting-edge projects? As a Senior AI Engineer at 1global, you will play a pivotal role in developing innovative AI solutions that drive our business forward. You will collaborate with a dynamic team of engineers and data scientists to design, implement, and optimize AI algorithms and models.Join us in shaping the future of AI technology!

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.

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.

At Machine Learning Reply, we empower businesses to transform cutting-edge AI technologies into practical applications and scalable digital products.We are seeking a passionate Junior AI Application Engineer to join our team, dedicated to developing AI-powered solutions and intelligent product features utilizing modern Machine Learning and Generative AI technologies.While our GenAI Engineers focus on model development and AI architectures, AI Application Engineers concentrate on crafting user-centric AI applications and translating AI capabilities into scalable products.In this role, you will collaborate across AI Engineering, Backend Development, Product Development, and Cloud Deployment to build production-ready AI systems that deliver tangible business value.ResponsibilitiesAs a Junior AI Application Engineer, you will design and develop AI-driven applications and product features for enterprise clients. Your responsibilities will include:Conceptualizing and developing AI applications such as enterprise assistants, copilots, semantic search platforms, and automation systems.Assisting in the development of LLM-based solutions (including RAG) and end-to-end AI products by integrating APIs, enterprise data, and backend services.Building scalable AI microservices, APIs, and vector search, embedding, and retrieval systems.Rapidly prototyping AI features and evolving them into production systems.Collaborating closely with product managers, designers, AI engineers, and clients to develop impactful solutions.Deploying AI systems in cloud and production environments using modern DevOps practices.Ensuring reliability, scalability, and observability through CI/CD, monitoring, and containerized deployments.BenefitsHYBRID WORKINGCOMPANY EVENTSEXPERT NETWORKCERTIFICATIONSRegular and systematic (external and internal) training opportunities in Generative AI, LLM development, Cloud architecture, and Data Science.Work in an open, flat environment, within a broad Reply network for knowledge exchange.

Design and develop robust, scalable systems and services tailored for personalized content delivery.Implement intricate architectures that encompass both backend and frontend components, ensuring optimal reliability, efficiency, and maintainability.Work collaboratively with diverse teams to seamlessly integrate machine learning models into production systems.Lead comprehensive feature development, from initial concept and design through implementation, testing, and deployment.Influence architectural decisions that adhere to best practices in system design, code quality, and DevOps automation.