
Voyfai · Berlin
Join Voyfai, a fast-growing Series A startup shaping the future of logistics and technology across Europe. Headquartered in Berlin, we operate at the center of...
Join Voyfai, a fast-growing Series A startup shaping the future of logistics and technology across Europe.
Headquartered in Berlin, we operate at the center of a broader group of companies active across several European markets. This is
a unique opportunity to take ownership from day one, drive meaningful impact and grow within a dynamic, fast-paced environment.
Whether you're shaping processes, building strategies or leading initiatives, your contributions will directly influence the
success of Voyfai and the companies we support. If you're passionate about building from scratch and excited to be part of a
company on the rise, we'd love to hear from you.
Your Role
As a Senior AI Product Engineer at Voyfai, you will own LLM pipelines that process real logistics documents and data in
production, in multiple languages and formats. You will work closely with Product and Engineering to turn complex, unstructured
problems into robust, production-ready AI solutions.
This role is hands-on and impact-driven. You will take end-to-end ownership from use case discovery and prompt design to
deployment, monitoring and continuous improvement in production, with a strong focus on real-world reliability and business
impact.
Key Responsibilities
validation, eval harnesses, retries, fallbacks, monitoring, alerting and cost tracking
deterministic code is the right answer
each use case
What You Bring
production
handling non-determinism and writing evals that catch regressions before users do
What We Offer
Artefact, a global AI and data consulting company with rapid growth, is looking for a creative and tech-savvy Senior AI Engineer (m/f/d) to join the tech team full-time. Ideally, you are located in Hamburg, Munich, Berlin or nearby - but if you're based elsewhere in Germany and a great fit, we would still love to hear from you. Could this be you? Our data & AI experts develop production-ready, scalable solutions that bring real business value to our clients. You’ll work in interdisciplinary teams of data scientists, engineers, analysts and consultants to shape the future of data- and AI-driven products. Your responsibilities: Innovate. You’ll help identify business needs, explore data and AI use cases, and drive projects from idea to production - whether it’s a proof-of-concept or a scalable solution. Build. You’ll own your work end-to-end - from concept and architecture to implementation, optimization, and delivery. You design smart, robust solutions using data or LLMs and other AI technologies. Train. You’ll stay ahead of the curve - experimenting with new models, prompt engineering, fine-tuning, and tools. You’ll also share your knowledge within the team and benefit from our partners’ training offers (Google, AWS, etc.). Collaborate. You’ll work closely with clients, product owners, and non-technical stakeholders, balancing technical excellence with practical business impact. Gain broad experience: * Work on 1-3 projects per year across different industries and use cases - from customer service automation to knowledge management and internal tools. * Build real-world data and AI applications using modern tools like LangChain, PydanticAI, MCP servers, RAG pipelines, vector databases (e.g. FAISS, Weaviate), LlamaIndex, Vertex AI, OpenAI APIs, and Hugging Face models. * Shape the way clients use data and AI, driving innovation and best practices in production environments. Your mindset: * Curious & forward-thinking. You are passionate about solving complex problems using cutting-edge AI and data technologies. * Hands-on. You have experience with LLMs (e.g. OpenAI, Claude, Gemini, LLaMA), prompt engineering, API integration, and ML frameworks. * Holistic. You understand the full ML lifecycle, including data preparation, model deployment, evaluation, and monitoring. * Communicative. You can break down technical concepts for diverse audiences in English and ideally in German as well. * Supportive. You coach junior team members, provide constructive feedback, and actively contribute to our culture of learning. Profile: * Degree in computer science, AI, data science or similar field. * Experience: 3+ years of experience in machine learning or AI engineering, with hands-on AI projects in production. * Proficiency in Python and cloud-based AI services (GCP, AWS, or Azure). * Solid understanding of data analysis/engineering and AI-specific components like RAG, prompt design, fine-tuning, embeddings, and model evaluation. * Familiar with DevOps and ML-Ops best practices (Docker, Kubernetes, CI/CD). * Strong problem-solving skills, a sense of ownership, and a structured approach to work. * Languages: Business-fluent German and English (both written and spoken) are mandatory to participate in client workshops and deliver polished presentations. * Work Eligibility: A valid work permit for Germany. Why ARTEFACT? * Challenging projects with national and international clients across industries (e.g. L’Oréal, Samsung, Allianz, Sanofi). * Diverse career paths, promotions based on your performance - not tenure. * Strong team culture and real collaboration across disciplines. * Personal development through workshops, certifications, coaching, and access to partner programs (Google, AWS, etc.). * Attractive benefits: hybrid work, flexible hours, 1 additional day off for your birthday, Christmas & New Year's Eve off, mental health support, 4 weeks of workation, corporate benefits, office brunch, team events, and more. Let’s shape the future of AI - together! Don't worry if you don't meet all the criteria! At Artefact, we value motivation, pragmatic problem-solving, and potential above all else. If you are excited about shaping the future of AI and ready to make a real impact, we'd love to hear from you. Artefact is a global consulting company specializing in data and AI services, headquartered in Paris. With 2,000+ consultants, data scientists, and engineers across 26 countries, we work with global market leaders. At our German offices, we are on a rapid growth trajectory, advising leading national and international clients cross-industry on how to unlock the full potential of their data, build scalable data architectures, and implement cutting-edge AI solutions. Artefact is dedicated to leveraging data and AI to enhance organizations and their people. We believe that unique perspectives fuel innovation. At Artefact, we are committed to creating an inclusive environment where everyone can thrive. We welcome and consider all applications purely based on merit, skills, and potential - regardless of gender identity, sexual orientation, race, ethnicity, religion, age, background, or disability. Come as you are! Curious to learn more? Reach out to us at: bewerbung-de@artefact.com.
JOIN VOYFAI, A FAST-GROWING SERIES A STARTUP SHAPING THE FUTURE OF LOGISTICS AND TECHNOLOGY ACROSS EUROPE. Headquartered in Berlin, we operate at the center of a broader group of companies active across several European markets. This is a unique opportunity to take ownership from day one, drive meaningful impact and grow within a dynamic, fast-paced environment. Whether you're shaping processes, building strategies or leading initiatives, your contributions will directly influence the success of Voyfai and the companies we support. If you're passionate about building from scratch and excited to be part of a company on the rise, we'd love to hear from you. YOUR ROLE We are seeking an experienced Senior Software Engineer (m/f/d) to play a key role in building the core infrastructure of our logistics platform. In this role, you will work closely with AI engineers and product stakeholders to define system architecture, integrate with transport management systems, and develop customer-facing features powered by large language models. Your work will be critical in shaping our engineering practices and establishing a scalable foundation for future product development over the next 12 months. KEY RESPONSIBILITIES: * Design and develop scalable software solutions with a strong focus on system architecture and clean code * Build and optimize integrations with transport management systems and third-party logistics platforms * Collaborate with AI engineers to deliver customer-facing features powered by large language models * Improve system reliability, maintainability and scalability by addressing technical debt and evolving the tech stack * Work with PostgreSQL to ensure data consistency, integrity and performance * Leverage cloud platforms such as AWS or GCP to support infrastructure and deployment * Contribute to DevOps and CI/CD practices to improve release speed and operational stability * Occasionally support customers directly, helping translate their needs into product and engineering solutions WHAT YOU BRING: * 5+ years of professional software engineering experience, with strong backend architecture skills and comfort across the full stack * Solid command of JavaScript or TypeScript across both backend and frontend contexts * Experience with SQL databases, preferably PostgreSQL * Hands-on experience deploying and operating applications on cloud platforms like AWS or GCP * Familiarity with DevOps, CI/CD pipelines and modern software development practices * Clear communication skills and the ability to collaborate effectively with technical and non-technical stakeholders * A proactive, ownership-driven mindset suited for fast-paced startup environments WHAT WE OFFER * Competitive salary and equity options * A dynamic, fast-paced work environment with a mission-driven team * Flexible working arrangements (Hybrid) * 30 days of PTO * Regular team events and offsites * Monthly mobility budget via Navit
At Upvest, we are on a mission to make investing as easy as spending money. Upvest empowers businesses to offer a wide range of investment products and the best experience in the field of capital market investment and retirement planning. Upvest's Investment API is easy to integrate so that fintechs and financial institutions can save resources and fully focus on their core business. We are proud to partner with Europe's leading fintechs and financial institutions such as DKB, Revolut, N26 and Raisin. Founded in 2017 by Martin Kassing, Upvest now brings together over 270 talented professionals from more than 70 nationalities. We're backed by world-class investors such as Hedosophia, Sapphire, Bessemer Venture Partners, BlackRock, Earlybird, HV Capital, Notion Capital, and Motive Ventures. 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We are committed to flexibility — we understand you don't always have to be in the office to do your best work. * Team celebrations: Participate in company-wide events such as UpFest, dinners, offsites and our holiday party to connect with colleagues and celebrate our achievements. OUR VALUES * Make it easy for others. We simplify the complex and act with the best intentions. * Own the outcome. We are proactive, fast and confident to get the job done, valuing progress over perfection. * Rise to the challenge. We aim high and push the boundaries. We stay curious, learn and celebrate our wins together. * Tell the story. We start with the Why to align on purpose. We are transparent and share knowledge to empower and inspire others. Upvest is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.