We're seeking a Senior Data Scientist with deep expertise in probabilistic AI and statistical machine learning to support a client's e-commerce platform. In this role, you'll design and validate probabilistic models - covering dynamic pricing, shipping cost estimation, recommendations, and segmentation - while working closely with our solution architect, the client's CTO, and the client's engineering team to shape how those models fit into the platform's architecture.
Project Length: 3 - 6 months.
Key Responsibilities
- Bayesian modeling and inference: Design and implement Bayesian statistical models - priors, likelihoods, and posterior inference - to support decisioning under uncertainty across pricing, segmentation, and demand-related use cases.
- Markov chains and Hidden Markov Models: Build Markov chain and Hidden Markov Model formulations for sequential and behavioral patterns (e.g., customer lifecycle stages, state transitions), producing outputs that downstream services can consume.
- MCMC and Metropolis-Hastings sampling: Apply Markov Chain Monte Carlo methods,



including Metropolis-Hastings sampling, to estimate posterior distributions for models without closed-form solutions, and validate convergence and sampling quality.
- Mixture modeling: Develop mixture models - Gaussian Mixture Models in particular - to support segmentation use cases, identifying latent customer or product groupings from transactional and behavioral data.
- Expectation-Maximization: Implement Expectation-Maximization for latent-variable estimation underlying mixture models and related unsupervised learning tasks.
- Architecture collaboration: Work alongside our solution architect and the client's CTO to align model design with platform architecture. While this is not an architecture-ownership role, you should be able to reason about integration points, service boundaries, and technical tradeoffs well enough to operate with a reasonable degree of autonomy and reduce the support load on

📌 [8BE] Senior Data Scientist, Probabilistic Modeling (Argentina)
🏢 Softwaremind
📍 Argentina