Santex is a global company headquartered in the United States, founded in 1999, with 25 years of industry experience. It has offices in California, USA, and Córdoba, Argentina, and its talent network spans over 18 countries thanks to its flexible and remote work policy. Specializing in custom enterprise software development, Santex operates through its Hubs, which cover eCommerce, BIM, Mobility, Content Delivery, Integration, Web and Mobile Development, Cloud Computing, Artificial Intelligence (AI), Data Science, Consulting, and IT Services. Additionally, Santex is committed to creating a positive impact in three dimensions: economic, social, and environmental.
Job Description: We are looking for a Senior AI Developer to join our team—someone with an agile mindset and a strong focus on rapid prototyping to support the design, development, and validation of AI Proofs of Concept (PoCs). This role is critical to accelerating technological exploration and providing technical support for internal initiatives that involve conversational agents, RAG systems, and model training.
The selected candidate will also actively contribute to AI-based solution development for internal products and may be assigned to client delivery projects based on business needs. We are seeking a versatile profile, able to adapt to changing contexts, solve emerging challenges, and collaborate across multiple teams including Product, Sales, and Technology.
Responsibilities:
- Design, build, and validate AI PoCs quickly and effectively
- Contribute to identifying AI application opportunities in internal products
- Provide technical support for internal developments integrating AI, working with internal/external resources and technology teams to improve or add new capabilities
- Collaborate with cross-functional teams to implement conversational agents, RAG systems, and other AI-driven solutions
- Train models and fine-tune pipelines according to business or user needs
- Develop and maintain frontend and backend components required to integrate AI solutions
- Work with Sales and Growth teams to estimate time, technical profiles, and capabilities for AI project proposals
- Support hiring processes by evaluating AI-focused candidates for internal and client-facing projects
- Document key learnings, decisions, and explored approaches to encourage continuous improvement and reuse
- Participate in internal initiatives and, when needed, join client projects in a technical AI-focused role
Requirements:
Technical skills
- Programming Languages: Python
- Machine Learning Tools: TensorFlow/PyTorch, LlamaIndex, scikit-learn
- Deep understanding of Deep Learning techniques and transformer architectures (e.g., BERT, GPT)
- Experience working with large datasets and data processing techniques (Data wrangling, ETL)
- Knowledge of cloud environments such as AWS
- Familiarity with language models and advanced NLP techniques
- Experience in training and fine-tuning LLMs, classifiers, embeddings, RAG models, etc.
- Full-stack development experience with at least one modern tech stack
Soft Skills
- Ability to work under pressure and in uncertain contexts (IMPORTANT)
- Strong analytical skills and ability to estimate technical effort (IMPORTANT)
- Proactivity in proposing ideas and solving problems independently
- Critical thinking with a results-oriented mindset
- Flexibility and adaptability to new technologies and changing directions
- Strong collaboration skills with product, design, sales, and engineering teams
- Excellent communication skills, both oral and written, for technical and non-technical audiences
Desirable:
- Previous experience working with product or innovation teams
- Participation in hackathons, innovation labs, or R&D environments
- Contributions to open-source projects or technical publications
- Intermediate to advanced English proficiency with ability to hold fluent technical conversations
English not required
Required Location:
- Argentina