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Urgent! Senior Backend Engineer Position in Comuna 13 - The Mobile-First Company

Senior Backend Engineer



Job description

Senior Backend Engineer

Company: The Mobile-First Company

Seniority level: Mid‑Senior level

Employment type: Full‑time

We build mobile‑first business software that feels like a consumer app and runs on AI.

Our first product, Allô, offers a second phone number, AI‑powered call answering, transcription, and CRM sync.

Over 20,000 businesses use it daily.

Next we’re expanding into expenses, invoicing, and more.

What you’ll do

  • Work side by side with the CTO to build the foundations, present, and future of our backend and AI systems.

  • Develop and enhance backend systems for existing and new mobile applications in collaboration with mobile engineers.

  • Contribute to system design, infrastructure planning, CI/CD processes, and data workflows.

  • Implement and maintain scalable, reliable backend services using languages such as Kotlin, Java, Go, Python, or similar.

  • Design and define backend tools, databases, and the architecture of our apps.

  • Build and integrate with cloud services (e.g., AWS, Supabase, Cloudflare).

  • Create reusable tools, libraries, or components to improve backend development efficiency.

What we’re looking for

  • Strong backend development experience with a proven track record building scalable, reliable systems.

  • Proficiency in languages such as Kotlin, Java, Go, Python, or equivalent.

  • Experience with database design, management, and optimization.

  • Knowledge of system architecture patterns and ability to choose appropriate solutions.

  • Familiarity with monitoring tools like New Relic or Datadog.

  • Experience applying AI models to real‑world product use cases is a strong plus.

  • Excellent coding practices, performance awareness, and data‑driven improvement mindset.

  • Clear communication, fast execution, ownership, and comfort with ambiguity.

  • Fluency in English.

How you think

  • Curiosity about why we build things, not just how.

  • Smart questioning, challenging ideas when needed, and shaping future direction.

  • Focus on user value and business impact.

How you work

  • Clear communication, constructive feedback, and support for others’ growth.

  • Fast, autonomous execution with high ownership.

  • Comfortable in a small team with big goals.

What matters to us

  • 4+ years in product companies, designing and building high‑performance systems used by millions.

  • Proactive, autonomous, and able to fill gaps.

  • Strong English communication; Spanish and French skills are a plus.

What we offer

  • Competitive salary (USD or local equivalent).

  • Equity package.

  • 10‑day team retreats abroad every quarter.

  • 30‑day onboarding in Paris (flights and housing covered).

  • Choice of laptop and work setup.

  • Private health insurance (US or LATAM hires).

  • Fast‑paced, ambitious team building something real.

How to apply

  • Click the Apply button on this page; no cover letter needed – just tell us who you are and why this role fits you.

  • If you’re not a perfect match but want to join us, send a spontaneous application to ****** .

  • We welcome people from all backgrounds and especially encourage members of underrepresented groups in tech.

Referrals increase your chances of interviewing by 2x.

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