The Mobile - first Company - Staff Backend Engineer (java/kotlin)

Backend Engineer

Location: Buenos Aires, Argentina (Hybrid)

Most tools for small businesses weren't built for real operators. They were built for employees in offices, not people running a business from their phone. We're changing that.

We build mobile-first business software that feels like a consumer app, runs on AI, and spreads like a creator brand. Our first product, Allô, gives you a second number on your phone, answers missed calls with AI, transcribes everything, and syncs it to your CRM.

Over 20,000 businesses use it every day. Next up: expenses, invoicing, and more.

We've raised +5 million dollars from Lightspeed, EMBLEM, and 30+ top operators. Our team is based in Paris, Buenos Aires, Miami.

What Will You Do:

• Work side by side with our CTO to build the foundations, the present, and the future of our backend, and AI systems.
• Develop and enhance backend systems for both existing and new applications in conjunction with mobile engineers.
• Contribute to systems design, infrastructure planning, CI/CD processes, and data workflows.

What You'll Be Working On:

• Implementing and maintaining scalable and reliable backend systems using languages like Kotlin, Java, Go, Python or similar.
• Designing and defining backend tools, databases, and the architecture of our apps.
• Working directly with Cloud services (e.g., AWS, Supabase, Cloudflare).
• Creating tools, libraries, or components to enhance the efficiency of backend development processes.

What We're Looking For

1. Backend Engineering:
   • Proficiency in backend development with expertise in languages like Kotlin, Java, Go, Python or similar.
   • Familiarity with database design, management, and optimization.
   • Track record of building and maintaining scalable and reliable backend systems.
   • Experience with AI is a strong plus, especially in applying models to real-world product use cases and optimizing performance in production environments.
2. Systems Architecture:
   • Expertise in designing scalable and maintainable backend architectures, understanding when to apply different architectural patterns.
   • Capable of monitoring the whole architecture using tools like New Relic or Datadog.
3. Performance and Data:
   • You know how to build scalable and maintainable code.
   • You care about what to measure and how it impacts business and users.
   • You track behavior, usage, and performance, and improve based on it.

4. How You Think:
   • You care about why we build things, not just how.
   • You ask smart questions, challenge ideas when needed, and help shape what's next.
   • You think in terms of user value and business impact.
5. How You Work:
   • You communicate clearly, give feedback with no ego, and help others grow.
   • You move fast, take ownership, and thrive in ambiguity.
   • You're comfortable working in English — and in a small team with big goals.

What Matters To Us

• You've worked in product companies.
• 6+ years of experience designing and building high-performance systems used by millions.
• You're proactive, autonomous, and know how to fill the gaps.
• You can communicate in English, since that's our official language. Most of the team also speaks Spanish and French.

What We Offer

• Competitive salary (in USD or local equivalent)
• Equity package
• 10-day team retreats abroad every quarter
• 30-day onboarding in Paris (we cover flights and housing)
• Laptop and work setup of your choice
• Private health insurance (for US or LATAM hires)
• A tight, ambitious team building something real — fast

The Interview Process:

• Silver.dev Recruiter Screening
• Client People Interview
• Client Technical Interview
• Client Behavioral Interview