Block is looking to solve complex risk challenges across access, fraud prevention, and compliance by developing advanced deep learning and reinforcement learning based signals and learned representations for machine learning models.
Requirements
- End-to-end experience across the full ML lifecycle, from problem framing and data gathering to training, evaluation, deployment, and ongoing iteration
- Strong background in building and productionizing deep learning or advanced ML models using large-scale datasets
- Proficiency in designing and maintaining scalable ML pipelines, production services, and high-quality ML software systems
- Ability to ship customer-facing ML features, including prototyping, rigorous testing, monitoring, and reliable deployment
- Experience with major cloud platforms to deliver and operate high-scale ML workloads
- Deep understanding of modern ML techniques; experience in deep learning, reinforcement learning, or broader AI applications
- Ability to produce production-quality code and services, while also rapidly building MVPs and iterating quickly to improve product outcomes
Responsibilities
- Dreaming up, designing, and running big experiments to quickly test out cool (and practical) ideas
- Applying the latest theoretical breakthroughs to make our products even better
- Building experiments, prototypes, and architectural designs across computer science fields like ML, data mining, NLP, and agentic AI
- Contributing to the growth of new initiatives by sharing emerging trends and best practices, fostering a collaborative and innovative environment
- Taking the lead on defining data structures, frameworks, designs, and evaluation metrics for your research solutions – you'll have a lot of autonomy here
- Teaming up with folks inside the company to find new research areas and shape our long-term strategies
- Running experiments for your applied research, using simulations and prototypes to see what happens
Other
- A Level 6 hire, which usually means something like: BSc with 7-10 years experience, MSc with 5-8 years experience, PhD with 3-5 years experience
- Bonus: hands-on work with agentic or novel AI systems
- Strong communicator comfortable partnering with cross-functional teams and contributing to the ML/AI community
- Creative problem-solver with the ability to tackle complex technical challenges
- Block will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances.
