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Software Engineer – Security & Infrastructure 🇦🇷

The Mobile-First Company

Skills

Required

  • backend
  • AI
  • cloud
  • AWS
  • networking
  • CI/CD
  • monitoring
  • autonomous
  • fixed vulnerabilities

Preferred

  • CTFs
  • bug bounties
  • Authentication
  • Cloudflare
  • Kotlin
  • Java
  • Go
  • Python
  • 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.

About The Mobile-First Company

About The Mobile-First Company

  • We’re changing that.
  • mobile-first business software that feels like a consumer app, runs on AI, and spreads like a creator brand.
  • Our first product, Allo, 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

  • +15 million dolars from Base10, Lightspeed, EMBLEM, and 30+ top operators.
  • Our team is based in Paris, Buenos Aires
  • Miami

Responsibilities

  • Work side by side with our CTO to own our security and compliance roadmap, from strategy to execution.
  • Lead our offensive security track with external partners: scope pentests, triage findings and drive the fixes across infrastructure and code.
  • Partner with our Infra & Platform team to design, harden and scale the backend and cloud infrastructure behind our products.
  • Securing our cloud infrastructure (e.g., AWS, Supabase, Cloudflare): IAM, networking, encryption, secrets and logging.
  • Authentication, authorization and data protection across our apps.
  • Building security into our CI/CD: code, dependency and secret scanning that keeps pace with a team that deploys every day.
  • Writing the code, automations and tooling that fix vulnerabilities and keep them from coming back.
  • Owning our compliance controls (HIPAA, GDPR, SOC 2) and closing the technical gaps.
  • Monitoring, alerting and incident response for a real-time telephony and AI product.
  • Proficiency in backend development with expertise in languages like Kotlin, Java, Go, Python or similar.

Requirements

  • 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.

Security

  • Hands-on security work in production: you’ve fixed vulnerabilities, implemented authentication and authorization (OAuth, JWT, RBAC), or worked in a security, fraud or platform team.
  • Strong knowledge of secure coding practices and the OWASP Top 10.

Infrastructure

  • Hands-on experience with AWS or a similar cloud, networking and production environments.
  • Familiarity with Infrastructure as Code, CI/CD and monitoring tools like New Relic or Datadog.
  • 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.

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

  • 4+ years of experience building and operating backend systems in production, with hands-on responsibility for application or infrastructure security.
  • You understand production. You consider reliability, observability and recovery alongside security, especially when changes affect live customer calls.You
  • ’re proactive, autonomous, and know how to fill the gaps
  • You prioritize by real-world risk. You can explain what needs fixing today, what can wait, and why, in terms of our users, their data and our business.
  • You’re proactive, autonomous, and know how to fill the gaps
  • You’ve worked in product companies

Preferred

  • Security work beyond your day job (CTFs, bug bounties, certifications, side projects) is a strong plus.

Benefits

  • You can communicate in English, since that's our official language. Most of the team also speaks Spanish and French.
  • Equity package
  • 10-day team retreats abroad every year
  • Trips to our Hubs (Pairs/Miami/BA) for onboarding and more
  • Laptop and work setup of your choice
  • Coverage for private health insurance (for US or LATAM hires)
  • A tight, ambitious team building something real: fast

How you think

How to apply

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  • No cover letter needed just tell us who you are and why this role fits you.
  • We welcome people from all backgrounds.
  • If you’re part of an underrepresented group in tech, we especially want to hear from you.