Fullstack Engineer - Internal tools

Thaia; Argentina; Presencial; ARS 1.200.000 - 2.000.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Flexible equipment

Food & transport

Wellness stipend

Flexible PTO

Occasional travel

Relocation package

Descripción de la vacante

Thaia in Buenos Aires seeks a Full-stack Platform Engineer to own features across Auth, Billing, and core business logic. You will work across the stack from idea to production, building admin panels and internal tools with product and design collaboration.

You’ll ship end-to-end features, improve reliability and UX, and take ownership of the platform from UI through backend services. Strong React/TypeScript, Python or Rust, Node.js and PostgreSQL experience are required; English fluency is

Formación

• 7+ years building product across the full stack
• Strong React and TypeScript on the frontend
• Solid backend experience in Python or Rust and Node.js
• PostgreSQL or equivalent
• You've worked on Auth or Billing systems before
• You take ownership end-to-end: design decisions, edge cases, production incidents
• Fluent English — collaboration with NY team

Responsabilidades

• Build and maintain features across Auth, Billing, and core Business Logic
• Own self-serve improvements that reduce friction for users and reduce load on internal teams
• Work on the Admin Panel and internal tooling — interfaces that make the team faster and the product more operable
• Collaborate closely with product and design to scope, build, and ship across the full stack
• Identify gaps in reliability or user experience and fix them without waiting to be asked

Conocimientos

React

TypeScript

Python

Rust

Node.js

PostgreSQL

Auth

Billing

API design

English

Herramientas

Next.js

Descripción del empleo

They build the infrastructure that helps companies understand and optimize how they appear across AI-powered search engines and assistants. Their platform is used by some of the largest brands in the world to monitor, analyze, and act on how AI systems describe and recommend them — a category that didn't exist two years ago and is now critical to how companies think about visibility and growth.

The Buenos Aires engineering hub is a core part of how they build — not a satellite office, not a support team. Engineers here work on the same problems, with the same ownership, as the team in New York.

Fullstack Engineer

They're looking for a Full-stack Platform Engineer to work across the systems that hold the product together: Auth, Billing, core Business Logic, the Admin Panel, self-serve improvements, and internal tooling. This isn't a role where you own one layer — you'll move across the stack and take features from idea to production.

It's a good fit if you care about the whole system, not just your slice of it, and you're comfortable making product and technical decisions in the same conversation.

What You'll Do

• Build and maintain features across Auth, Billing, and core Business Logic — the systems every customer and team member touches
• Own self-serve improvements that reduce friction for users and reduce load on internal teams
• Work on the Admin Panel and internal tooling — interfaces that make the team faster and the product more operable
• Collaborate closely with product and design to scope, build, and ship across the full stack
• Identify gaps in reliability or user experience and fix them without waiting to be asked

Who you are

• 7+ years building product across the full stack — you've shipped things that real users use
• Strong React and TypeScript on the frontend — you write UI that works well and holds up under real usage
• Solid backend experience in Python or Rust and Node.js — you're comfortable with APIs, databases, and the logic that sits between them. Open to similar stacks as well, as long as there's genuine interest in learning these technologies
• PostgreSQL or equivalent — you model data thoughtfully and understand the tradeoffs
• You've worked on Auth or Billing systems before and understand why they require more care than a typical CRUD feature
• You take ownership end-to-end: design decisions, edge cases, production incidents, and everything in between
• Fluent English — the broader team is in New York and collaboration is daily

Bonus if you have

• Experience with Next.js in production
• Exposure to AI/ML integrations in a product context
• Background in developer tools or B2B SaaS

You're Probably Not a Fit If

• You strongly prefer to stay in one layer of the stack
• You're used to receiving detailed specs and following them — this team moves faster than that
• You haven't owned a feature from start to finish, including what happens after it ships

Location

• Based in Buenos Aires, in-office 4–5 days/week (Palermo)

Benefits & Perks

• Flexible equipment: Laptop and office setup covered so you can work the way you work best.
• Food & transport: Meals and rides home covered on late nights.
• $150 USD/month wellness stipend: Spend it on fitness, gear, or whatever keeps you at your best.
• Flexible PTO: Vacation within normal ranges, taken when it makes sense for you and the team.
• Occasional travel: Some trips are part of the role — fully covered when they come up.
• Relocation support: Full relocation package available, including for candidates moving from other states.

If you want to work on the systems that hold a product together — and you're comfortable owning both the UI and the logic behind it — this is the role.