Senior Machine Learning Engineer (m/f/d)

About Ojin, by Journee:

We are now building and launching Ojin, a new real-time generative AI platform for developers. Ojin extends our core technologies to serve the growing demand for interactive real-time AI applications. For this new venture, we are building a small, ambitious team, and we're looking for a passionate Machine Learning Engineer to join us on our journey to build the platform on which these new experiences will be created.

About the Role:

This is a full-time position, either in our Berlin office or remote (CET +/- 2h).

As our first dedicated Machine Learning Engineer, you will play a pivotal role in shaping the future of our real-time generative AI platform. This is a unique opportunity for a mid-to-senior level engineer to take ownership of our ML-powered features, from experimentation with new models to their deployment and optimization in a production environment.

You will be at the heart of our mission to make real-time generative AI accessible and affordable. You will work closely with a cross-functional team of product managers, backend, and systems engineers to bring our vision to life.

What You'll Do:

• Deploy and optimize models: Deploy, optimize, and maintain real-time generative AI models for text, audio and video on our inference stack. You'll be responsible for ensuring they are performant, reliable, and highly cost-effective.
• Experiment and integrate: Research, test, and integrate new state-of-the-art open-source models into our platform to expand our offerings.
• Fine-tuning: Fine-tune models to meet specific customer needs and improve user experience.
• Build and maintain ML infrastructure: Collaborate with the engineering team to build and maintain our MLOps infrastructure, including our inference serving stack and model management systems.
• Cross-functional collaboration: Work closely with product, design, and engineering to define the roadmap for our ML-powered products and features.

What We're Looking For:

• Experience: You have 3+ years of hands-on experience in machine learning engineering, with a proven track record of deploying and optimizing models in production environments.
• Technical skills: You are proficient in Python and have deep experience with modern, asynchronous Python (asyncio) and ML frameworks like PyTorch, TensorFlow, or JAX.
• MLOps: You have a solid understanding of MLOps principles and experience with tools for model serving, monitoring, and automation.
• Model optimization: You have experience with model optimization techniques (e.g., quantization, distillation, pruning) for real-time performance.
• Problem solver: You are a pragmatic problem-solver, able to balance technical trade-offs with business needs.
• Collaborative spirit: You have excellent verbal and written communication skills, with the ability to convey complex technical concepts clearly and effectively. You enjoy working in a collaborative, cross-functional team environment.
• Adaptability: You are highly adaptable and thrive in dynamic, fast-paced startup environments.
• Language: Professional fluency in English, both spoken and written.

Nice-to-Haves:

• Experience with real-time generative models for audio or video.
• Experience with AWS.
• Experience with containerization (Docker) and orchestration technologies.
• Experience working in a fast-paced startup environment.
• Contributions to open-source ML projects.

Why work with us:

• Flexibility: Work in Berlin or remotely in a similar time zone (CET +/- 2 hours).
• Pivotal role: As the first dedicated ML expert on the team, you will have the opportunity to grow with the company.
• Autonomy & impact: High degree of autonomy and direct impact on our product and technology, working on cutting-edge projects with top global brands.
• Values: We have strong values in place: high performance, transparency, continuous learning, humbleness, and pride.