AI Engineer

Modus

AI Engineer at Modus Digital building intelligent user-centric AI solutions. Involves working across full AI stack including data design and model tuning in a hybrid setting.

Posted 4/17/2026full-timeBuenos Aires • 🇦🇷 ArgentinaMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

AWSCloudJavaScriptTypeScript

About the role

Key responsibilities & impact

Build AI-powered solutions for client projects, from discovery through production
Integrate AI models (OpenAI, open-source LLMs, etc.) into production systems and APIs
Develop and optimize prompts, retrieval systems (RAG), and agent-based workflows
Implement guardrails, observability, and monitoring for AI systems
Optimize performance, latency, and cost of AI applications
Rapidly prototype solutions to validate ideas and demonstrate value to clients
Document approaches, experiments, and system architecture clearly
Work cooperatively with Modus project and account managers, designers, engineers, and other team members, as required
Report progress/updates and/or communicate with other team members, project leads, and our clients, as required
Other duties related to the position that may arise from time to time and as may be assigned

Requirements

What you’ll need

5+ years of experience in software engineering, machine learning, or related fields
Strong programming skills in JavaScript and TypeScript for integration
Hands-on experience with LLMs and modern AI tools and frameworks (e.g., OpenAI APIs, LangChain, vector databases)
Understanding of RAG architectures, embeddings, and semantic search
Experience integrating AI into full-stack applications (APIs, frontends, backend services)
Familiarity with cloud platforms (AWS preferred)
Strong (English) communication skills with the ability to explain AI concepts to non-technical stakeholders and clients
You’re located in Buenos Aires and are willing to work from our office at least 2 times a month (hybrid schedule)

Benefits

Comp & perks

For a complete list of employee benefits, refer to your local Employee or Contractor Handbook, as appropriate

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

JavaScriptTypeScriptmachine learningAI integrationRAG architecturesembeddingssemantic searchfull-stack applicationsAPI developmentperformance optimization

Soft Skills

communicationcollaborationdocumentationproblem-solvingclient engagement