Senior AI Engineer at Voyfai | Berlin

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.

Become a part of Voyfai, an innovative Series A startup revolutionizing logistics and technology throughout Europe.Based in the vibrant city of Berlin, we are at the forefront of a network of companies operating across various European markets.This is an exceptional chance to take the reins from the very beginning, make a significant impact, and thrive in a fast-paced, dynamic setting. Whether you're refining processes, crafting strategies, or spearheading initiatives, your efforts will directly affect the success of Voyfai and the enterprises we assist. If you have a passion for building innovative solutions from the ground up and want to be part of a rapidly growing company, we are eager to hear from you.Your RoleWe are on the lookout for a talented Senior Software Engineer (m/f/d) to join us in constructing the essential infrastructure of our logistics platform. In this pivotal role, you will collaborate closely with AI engineers and product stakeholders to define system architecture, integrate with transport management systems, and develop customer-facing features that utilize large language models. Your contributions will play a vital role in shaping our engineering practices and establishing a scalable foundation for future product development over the next year.Key Responsibilities:Design and implement scalable software solutions with a focus on robust system architecture and clean coding practices.Create and enhance integrations with transport management systems and third-party logistics platforms.Partner with AI engineers to deliver customer-centric features powered by advanced language models.Enhance system reliability, maintainability, and scalability by managing technical debt and evolving the technology stack.Utilize PostgreSQL to ensure data consistency, integrity, and performance.Employ cloud platforms such as AWS or GCP to facilitate infrastructure and deployment.Contribute to DevOps and CI/CD practices to enhance release speed and operational stability.Occasionally engage with customers to translate their requirements into product and engineering solutions.What You Bring:A minimum of 5 years of professional software engineering experience, demonstrating strong backend architecture skills and proficiency across the full stack.Proficient in JavaScript or TypeScript in both backend and frontend contexts.Experience with SQL databases, particularly PostgreSQL.Familiarity with cloud platforms such as AWS or GCP.Strong understanding of DevOps and CI/CD methodologies.Excellent problem-solving skills and a proactive approach to challenges.

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.

Be a part of Voyfai, an innovative Series A startup revolutionizing logistics and technology across Europe.Based in Berlin, we are strategically positioned at the heart of a diverse group of companies operating in various European markets.This is an exceptional chance to take charge from day one, create significant impact, and advance your career in a fast-paced, dynamic setting. Whether you're designing processes, crafting strategies, or spearheading initiatives, your efforts will directly contribute to the success of Voyfai and the partners we assist. If you have a passion for building from the ground up and are eager to be part of a thriving company, we want to hear from you!Your RoleAs the Expansion Manager (m/f/d), you will lead the launch of new Voyfai branches throughout Europe, which involves entering new markets and expanding in regions where we already operate.Unlike traditional market entry positions that focus solely on customer acquisition, Voyfai collaborates with established local freight forwarding teams that have strong commercial networks. Your responsibility will be to establish the operational groundwork that enables these teams to thrive within the Voyfai ecosystem.You will oversee the entire market launch process, encompassing legal establishment, operational framework, system implementation, and the rollout of Voyfai’s cutting-edge technology and procedures.Collaboration with central teams across product, engineering, finance, and operations will be crucial to ensure seamless launches and full integration into the Voyfai platform.What You Will DoLead the establishment of new Voyfai branches in partnership with local freight forwarding entities, ensuring readiness for operations and customer onboarding.Collaborate with external legal advisors and internal stakeholders to create the local legal entity, ensuring compliance with all necessary documentation and regulations.Implement Voyfai’s Transportation Management System (TMS) and AI-driven tools, guaranteeing that local teams are fully operational within the Voyfai framework.Coordinate the establishment of insurance, banking, employment contracts, and operational processes essential for the new entity's functionality.Provide training and support to local teams on Voyfai’s systems, workflows, and operational standards.Serve as a liaison between the local branch and Voyfai’s central teams for a smooth launch and integration process.

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.

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.

Role Overview Cosuno is looking for a Senior AI Engineer to join the AI team, working from Berlin or remotely. This role focuses on building and refining the intelligent systems that drive Cosuno’s platform for the construction industry. What You Will Do AI Agent Development: Design and improve intelligent agent systems that handle the complex tendering process using multi-step reasoning. End-to-End Product Integration: Own feature delivery across the stack, from model and API to the TypeScript front-end, making sure new capabilities fit smoothly into the web application. Ranking, Search, and Retrieval: Improve systems for subcontractor matching and marketplace search, focusing on ranking and retrieval performance. Price Prediction: Enhance models that estimate fair pricing for construction projects, helping users evaluate bids and make procurement decisions. Experimentation and Evaluation: Run offline evaluations, set up A/B tests, and use metrics to guide iterative improvements. Cross-Team Collaboration: Work closely with Product, Engineering, and Data teams to turn business challenges into meaningful ML and AI solutions. Production ML and AI Maintenance: Monitor, alert, and continuously improve all deployed machine learning and AI systems.

About RealistRealist is a pioneering WealthTech startup located in Germany, dedicated to revolutionizing the financial sector with state-of-the-art technology, insightful data analytics, and robust financial infrastructure. As we enhance our platform and technological capabilities, we are in search of a seasoned Senior Software Engineer to join our expanding team in Berlin and contribute to the creation of next-generation financial systems.About the RoleIn the capacity of Senior Software Engineer, you will be instrumental in designing and developing high-performance financial systems that efficiently handle vast quantities of data in a secure manner. You will collaborate closely with product, engineering, and data teams to architect scalable systems and aid in the development of intelligent, AI-driven financial applications.This position demands substantial experience in backend engineering, distributed systems, and data-intensive architectures, combined with a mindset conducive to a dynamic startup environment. We are particularly interested in candidates who are quick learners, capable of swiftly adapting to new technologies and evolving challenges.Key ResponsibilitiesDesign, develop, and maintain scalable backend systems that support data-intensive financial applications.Build and optimize high-performance OLTP systems for transaction-heavy workloads.Contribute to system architecture and design, ensuring reliability, scalability, and maintainability.

Be a part of Voyfai, an innovative Series A startup revolutionizing logistics and technology throughout Europe.Based in Berlin, we are positioned at the heart of a larger network of freight forwarding companies operating across various European markets.As we expand our presence in the Netherlands, your contributions will be crucial in driving the commercial success of our Dutch subsidiaries. You will generate new leads and establish initial relationships with potential customers, directly impacting their growth and success.This role presents a unique chance to take initiative from the outset, make a measurable difference, and advance in a vibrant and fast-paced atmosphere. If you have a passion for outbound sales, entrepreneurship, and being part of a rising company, we want to hear from you!

Legal teams often find themselves overwhelmed by monotonous tasks, causing delays across the organization. At Flank, we are revolutionizing this scenario.We operate at the forefront of AI innovation, developing the next generation of autonomous agents tailored for enterprises. We have successfully secured a $10M Series A funding round led by Insight Partners (US), with ongoing support from Gradient Ventures (Google’s AI fund), HV Capital, and Speedinvest (EU).Our solution is not merely an optional tool for small startups; we are actively deploying Flank agents within multinational corporations exceeding 100,000 employees, fully automating workflows that were previously deemed unsolvable. Our agents function continuously, under defined parameters with customer oversight, escalating only exceptions to legal for evaluation. Every action and request is transparent and auditable, assuring customers complete visibility over their automated workforce.We are on the lookout for a skilled AI Engineer to spearhead our applied AI projects.In our dynamic startup environment, you will collaborate closely with product, design, and commercial teams to deliver tangible AI solutions — moving beyond mere research experiments.Your responsibilities will include harnessing emerging technologies alongside a team of legal experts to enhance the intelligence and autonomy of our agents.This role may involve the creation of an evaluation framework in partnership with our legal team, or developing a hypervisor that governs each aspect of our agentic system, ensuring alignment with best practices in legal AI systems.

Role Overview airapps is looking for an AI/ML Engineer to help design and build machine learning models. This role works closely with a skilled team focused on using technology to improve processes and outcomes. Location Berlin Metropolitan Area

JOIN US IN REVOLUTIONIZING EDUCATIONAt Knowunity, we are on a mission to create the premier AI learning companion for 1 billion students worldwide.We envision a future where every student can access, enjoy, and benefit from top-notch educational resources. Since our inception in 2020, we have been dedicated to transforming the way students learn.With millions already utilizing our AI learning platform every week, and backed by a recent €27m investment—the largest in European education in the past three years—we are poised to lead the AI learning market into a new era of personalized education.As part of our elite team of 60 innovative builders, you will have the unique opportunity to contribute to a product that has the potential to change education on a global scale.Seize your chance to help shape a generational company!

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.

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.

About UsAt reliant-ai, we are dedicated to transforming decision-making in an age of overwhelming information. Our mission is to develop the next generation of machine learning software, leveraging generative AI to analyze critical data sources and deliver comprehensive, factual answers to complex inquiries.We believe that the true potential of generative AI can only be achieved by tackling the world's most significant information challenges. With over two decades of expertise in reinforcement learning and natural language processing, we are poised to make a substantial impact in this field.Our team consists of scientists, builders, and entrepreneurs who have pioneered some of the most influential AI applications. Having led teams at industry giants like Google, DeepMind, and EY Parthenon, we now connect cutting-edge AI research with the biopharma sector.

Zenjob connects businesses with temporary workers through a staffing platform that relies on AI-driven technology. Since launching in 2015, Zenjob has helped over 40,000 students find flexible work and has built partnerships with more than 1,000 companies in logistics, retail, and hospitality across Germany’s major cities. The company’s mission centers on making flexible work accessible and efficient by building dependable technology. Role overview The Senior Platform Engineer will join the Platform & Infrastructure team in Berlin. This role focuses on strengthening the systems and tools that support Zenjob’s engineering teams. Key areas of work include optimizing AWS infrastructure, managing Kubernetes clusters, and improving CI/CD pipelines with GitHub Actions. The team is also responsible for observability using Grafana, Prometheus, Datadog, and Incident.io, as well as exploring AI platform solutions such as n8n, LiteLLM, and Retool. Maintaining and improving the in-house CLI, developed in Go, is another important aspect of this position. What you will do Guide technical decisions and provide architectural input for platform infrastructure. Work closely with engineers across teams, including Data Platform and Platform Enablement, to deliver improvements for the broader engineering organization. Optimize cloud infrastructure on AWS, manage Kubernetes, and enhance CI/CD processes using GitHub Actions. Maintain and extend observability tools such as Grafana, Prometheus, Datadog, and Incident.io. Integrate and support AI platform solutions, including n8n, LiteLLM, and Retool. Contribute to the development and maintenance of the Go-based in-house CLI used by engineering teams. Requirements Experience treating infrastructure as a product, with a strong preference for Terraform. Ability to act as a trusted resource for engineers seeking solutions to platform challenges. Comfort working collaboratively and providing technical direction. Location This role is based in Berlin.

Your MissionAs the AI Automation Engineer at Cosuno, you will spearhead our efforts to enhance operational efficiency. Your expertise in our automation stack will enable you to collaborate with various teams across the organization to identify, design, and implement AI-driven workflows that revolutionize their processes. Instead of developing proprietary models from scratch, you will utilize cutting-edge existing models and reasoning chains to address critical business challenges.Working alongside the product team, you will engage closely with the CEO and CTO to ensure that all automation solutions are technically robust and aligned with our core infrastructure. This role is execution-focused, with success defined by the speed and reliability of the modular automation platform you develop.Key ResponsibilitiesDiscovery & Prioritization: Collaborate with Finance, Sales, Operations, and Product teams to uncover high-return automation opportunities and assess them based on their business impact versus technical feasibility.Workflow Engineering: Architect, prototype, and implement comprehensive AI workflows by developing our orchestration stack (e.g., n8n, Vector Databases) and integrating various endpoints via APIs to establish a universal memory for Cosuno.Scaling & Modularity: Create solutions that are modular and adaptable across departments, avoiding redundancy for new requests.Enablement & Governance: Set AI guardrails while empowering AI advocates in other departments to utilize the automations effectively.Monitoring & Optimization: Define and monitor success metrics (ROI, time savings, reliability) to guarantee that our automations continuously provide value.

Trinetix is seeking a talented AI Engineer to join our innovative team.As a part of Trinetix, you will work on exciting projects with a leading global telecommunications company that operates one of the most reliable internet backbones across over 100 countries. In this role, you will contribute to ambitious AI initiatives aimed at enhancing network operations through intelligent automation, predictive analytics, and AI-enabled workflows.Your work will involve developing GenAI applications, AIOps intelligence, and RAG-based systems, helping to revolutionize the monitoring, analysis, and operation of complex telecom infrastructures. This position integrates engineering, data science, and product strategy to deliver AI solutions that have a significant business impact.Join us to advance your career in a vibrant international setting while playing a pivotal role in shaping the future of AI-enhanced network operations.

About UsAt Melotech, we are transforming the media and entertainment landscape by merging art with technology, crafting experiences that resonate with audiences globally. In just two years, our innovative projects have garnered over 3 billion minutes of engagement worldwide.Founded by visionary entrepreneur Soheil Mirpour, we are proudly supported by leading venture capitalists including Cherry Ventures, Speedinvest, and GFC, along with esteemed angel investors from top firms such as Spotify, Blackstone, and KKR.Your RoleAs a Machine Learning Engineer at Melotech, you will be the pivotal force driving our content platform. You will face essential challenges: How can we construct ML systems that efficiently serve millions while ensuring low latency? What is the best architecture for developing and deploying models that interpret cultural trends instantaneously? How can we harness advanced models to enrich creative processes without compromising quality? Your autonomous work will directly shape our success, collaborating closely with our founder and team. Daily responsibilities may include:Building and implementing production-grade ML models within our content ecosystem.Designing scalable ML infrastructure and pipelines to manage extensive media datasets.Creating inference systems for content optimization across various sectors.Tuning and deploying multimodal AI systems utilizing MLOps best practices.Partnering with data science teams to transition research models into production-level solutions.Enhancing model efficiency for cost-effectiveness while ensuring accuracy and rapid response times.Integrating ML functionalities into existing platforms and developing APIs for streamlined model access.Your ProfileYou are an ML engineer focused on production who connects cutting-edge technology with scalable systems. Your expertise lies in constructing resilient ML infrastructures that support real-world applications at scale. You thrive in dynamic environments where your technical choices significantly influence business outcomes and user experiences. Your qualifications typically include:A degree in Computer Science, Machine Learning, Mathematics, Engineering, or a related field.3+ years of practical ML engineering experience developing production systems at leading tech companies, high-growth startups, or in the media/entertainment sector.Strong grasp of machine learning frameworks and libraries.Experience with cloud platforms and deployment strategies.Proficiency in programming languages such as Python, Java, or C++.

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!