Cloud Security Engineer

The Mobile-First Company; Buenos Aires; On-site; ARS 138,487,000 - 215,424,000; Full time

Benefits offered by this job

Equity package

10-day team retreats abroad

Trips to hubs

Laptop and work setup

Private health insurance

Job summary

The Mobile-First Company is seeking a security-focused engineer to own our security and compliance roadmap alongside our CTO. You will lead the offensive security track with external partners, scope pentests, triage findings and drive fixes across infrastructure and code.

You’ll partner with our Infra & Platform team to design, harden and scale the backend and cloud infrastructure behind our products. This role emphasizes hands-on AWS, IaC and data protection in a fast-growing environment.

Qualifications

• 4+ years of backend or infra security work in production.
• Hands-on with AWS IAM, VPCs, KMS, logging and monitoring.
• Experience with secure CI/CD, secrets management and least privilege.

Responsibilities

• Own security and compliance roadmap with CTO from strategy to execution.
• Lead offensive security track with external partners: scope pentests, triage findings, drive fixes across infra and code.
• Partner with Infra & Platform to design, harden and scale backend and cloud infrastructure.

Skills

Software development

AI tooling usage

Cloud experience

Security mindset

Tools

AWS

Terraform

CI/CD tooling

Job description

About The Mobile-First Company

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, 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.

+15 million dolars from Base10, 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 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.

What you’ll be working on

• 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.

What we’re looking for

1. Engineering background:

   You started as a software developer and still write production code in languages like Python, Go, TypeScript, Kotlin, Java or similar.

   You build tools and automations, not just configure them.

   You use AI tools in your daily work to move faster.

   2. Cloud & Infrastructure:

   Deep hands-on experience with AWS: IAM, VPC and networking, KMS, CloudTrail, GuardDuty or similar.

   Infrastructure as Code with Terraform, CDK, Pulumi or similar.

   Solid networking fundamentals: DNS, TLS, firewalls, WAF, VPNs.

   3. Security:

   You have found and fixed real vulnerabilities, from a pentest, an audit or your own monitoring.

   Experience with secure CI/CD, secrets management and least-privilege access.

   Experience with compliance frameworks (SOC 2, HIPAA, ISO 27001, GDPR) is a plus, not a requirement.

   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

• 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 can communicate in English, since that's our official language. Most of the team also speaks Spanish and French.

• You’ve worked in product companies

What we offer

• Competitive salary (in USD or local equivalent)

• 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