About us:
About the role:
We're building and scaling a profitable D2C product used by hundreds of thousands of customers globally, processing large volumes of traffic and revenue every month.

The product is well beyond MVP: it's battle-tested in production, monetizing at scale, and now entering a phase of rapid growth and expansion. We're doubling down on building a world-class engineering organization to support continued scale.

We're looking for a Senior Full-Stack Engineer who can take meaningful ownership of complex areas of the product — and run with them. You won't be waiting for tickets or specs. You'll be expected to drive technical decisions in your area, push back on scope when it's wrong, flag unrealistic timelines early, and own product areas end-to-end with mínimal supervision.

This is not about maintaining a legacy system. It's about scaling real products used by real users — fast, and shipping in days, not weeks.

If you're looking for a comfortable 9-5 role, this won't be the right fit. But if you're excited by ownership, accountability,



and building high-quality systems under real-world pressure, read on.

Key Responsibilities:
- Own complex product areas end-to-end — from architecture decisions through implementation, deployment, and post-launch iteration.
- Drive technical direction in your area without waiting for tickets or detailed specs.
- Provide engineering input directly to Product and leadership — push back on scope, flag risks, propose better solutions.
- Take responsibility for the reliability, performance, and scalability of your area in a high-traffic environment.
- Participate in (and lead) code reviews and raise engineering standards across the team.
- Mentor mid-level engineers and help elevate the team's technical bar.
- Contribute to hiring and onboarding new engineers.
- Set up and improve CI/CD pipelines and development workflows where needed.
- Monitor, debug, and improve the stability of production systems.
- Help shape eng

📌 Full-Stack Engineer (Buenos Aires)
🏢 Ruby Labs
📍 Buenos Aires