At VAIRIX, we’re looking for a senior, well-rounded engineer to build and maintain web products powered by AI, data, and visualization. This is a broad and challenging role spanning backend, frontend (both modern and legacy), and cloud.

What you’ll do

- Build async Python APIs (FastAPI) on top of a data warehouse
- Integrate large language models (LLMs) with structured output and cost control
- Develop React interfaces across a modern stack (Next.js) and a legacy one (React 18)
- Run AWS infrastructure: IaC, CI/CD, and containers
- Own authentication, multi-tenant authorization, and applied security

Must-haves

- Python 3.10+ async, FastAPI, and Pydantic v2
- SQLAlchemy 2.0 and SQL on a data warehouse
- TypeScript and React (18 and 19) with Next.js App Router
- Good judgment working on legacy React too (react-router v5, classic Redux)
- AWS (IAM, S3, EC2, Cognito), Docker, CloudFormation, and CI/CD with GitHub Actions
- Applied security (OAuth 2.0 / OIDC,



JWT, CORS, secrets management) and Git/Gitflow

Nice to have

- Snowflake, LLMs in production (Vertex AI), AWS Amplify, Looker embedded analytics
- TanStack Query, React Hook Form + Zod, Tailwind + shadcn/ui, Recharts
- Testing (pytest, Cypress, Jest) and experience migrating legacy stacks

About VAIRIX

VAIRIX is a nearshore software development company that partners with startups and growing organizations to build high-quality software and scale engineering teams.
We work in real-time with U.S. clients, combining a boutique approach with strong technical expertise, fast onboarding, and a focus on long-term collaboration.

Want to join us?

If you’re looking for a place where people matter as much as code — this might be it. Let’s talk.

📌 Senior Full-Stack Software Engineer (Buenos Aires)
🏢 Vairix
📍 Buenos Aires