Security Engineer (Early Career) (Ingeniero/a de Seguridad - Carrera Temprana) - Mexico City (Hybrid)

Ready to accelerate your career?

Clara is the fastest-growing company in Latin America. We've built the leading solution for companies to make and manage all their payments. We already help over 20,000 large and growing businesses operate with agility and financial clarity through locally issued corporate cards, bill pay, financing, and a powerful B2B platform built for scale.

Clara is backed by some of the most successful investors in the world, including top regional VCs like monashees, Kaszek, and Canary, and leading global funds like Notable Capital, Coatue, DST Global Partners, ICONIQ Growth, General Catalyst, Citi Ventures, SV Angel, Citius, Endeavor Catalyst, and Goldman Sachs - in addition to dozens of angel investors and local family offices.

We’re building the financial infrastructure that powers high-performing organizations across the region. We invite you to join us if you want to be part of a fast-paced environment that will accelerate your career and support you to do some of the best work of your life alongside a passionate and committed team distributed across the Americas.

Security Engineer (Early Career)

What you'll do

You will rotate across the security function in your first year, with real ownership from the first month. Expect the mix below to shift as the business does.

Secure the AI posture, without blocking it

Review how teams use LLMs, coding agents and AI tooling (Claude, agentic browsers, internal inference gateways) and help define guardrails that protect data without killing adoption

Operate our LLM-based investigation agent on the SIEM: catch hallucinated attributions, noisy alerts and conclusions the underlying data doesn't support, and tune its instructions before they reach production

Develop the core skill of this role: knowing when to trust an AI-generated result and when to verify it by hand

Help build our view of prompt injection, data exfiltration through AI tools, and model/agent permissions as first-class risks

Cloud security on AWS and GCP

Triage findings from AWS GuardDuty, GCP Security Command Center, IAM and network configuration reviews

Run configuration and posture checks, and drive fixes with the owning teams instead of just filing tickets

Contribute to our large-scale GCP project inventory and cleanup, and keep the central findings tracker honest

Learn Auth0, Cloudflare and Google Workspace security controls as they apply to identity, edge and SaaS

Secure code and CI/CD

Review internal tools, scripts and pull requests for the classics: hardcoded credentials, unsafe input handling, over-broad permissions, secrets in pipelines

Own SonarQube and dependency-scanning results for internal repositories: prioritize CVEs, follow up with developers, close the loop

Review CI/CD changes that touch security-sensitive configuration (secrets, deployment access, IAM bindings)

Help push secure-by-default patterns into how engineers actually work, including the code they generate with AI

Detection, response and triage

Write and refine Splunk queries to investigate alerts from identity/SSO, cloud, endpoint, email and network sources

Maintain detection rules and dashboards; hunt down false positives and false negatives

Reconstruct user activity timelines across systems and document findings with evidence, not just conclusions

Monitor the EDR console, investigate suspicious endpoints, and execute containment (host isolation, quarantine) with a senior engineer

Triage phishing reports, analyze URLs and attachments in sandbox and threat-intel tools, maintain email and web filtering policies, and run phishing simulations

Escalate fast and clearly when a finding exceeds what you can close on your own, and work incidents through incident.io

What we look for

1–2 years in security, IT, software engineering or a related technical role. Internships, CTFs, bug bounties, open-source contributions and serious personal projects all count.

Working knowledge of at least one of AWS or GCP: you know what IAM, security groups/VPC firewall rules, and a service account are, and you want to go much deeper

Comfort in the command line (bash), reading JSON and logs, and reading code in at least one common language (Python, JavaScript, Go) well enough to spot an obvious security issue

Basic familiarity with a log query language (SPL, KQL or similar), or the drive to become fluent quickly

Conceptual understanding of identity and authentication: OAuth, SSO, MFA, service-to-service auth

Hands-on experience using generative AI tools in a technical context, and a healthy skepticism about their output

A verify-before-you-conclude instinct: you never take a tool's, a vendor's or an AI agent's answer at face value without evidence

Strong written communication in Spanish and English. Much of this job is explaining findings clearly to people who aren't security engineers.

Comfort with ambiguity and pace: priorities change, the stack evolves, and you'd rather learn on the job than wait for a course

Nice to have

Prior exposure to a SIEM, EDR console (CrowdStrike, SentinelOne, Defender) or email/web security platform

Python or JavaScript for scripting and automation

Any experience with SAST/dependency scanning tooling, secrets management or CI/CD security

Experience prompting or building with LLM APIs, agents or MCP tooling

Entry-level certifications (Security+, AWS Cloud Practitioner, Google Cloud Digital Leader / Associate Cloud Engineer, or similar)

Portuguese

What you'll get

Exposure to the full security surface of a regulated fintech in your first year: cloud, code, detection, response, compliance and AI, rather than a single queue

A senior team that pairs with you on investigations and reviews, and expects you to push back when the evidence doesn't hold

Direct work on problems most security teams haven't solved yet: securing agentic AI in production

A modern stack: AWS, GCP, Splunk, Auth0, Cloudflare, SonarQube, incident.io, Claude and internal AI tooling

Budget and time for certifications, conferences and the hacker community

Fast, transparent hiring: application review, a technical conversation about real scenarios (no gotcha puzzles), a practical exercise you can do in a few hours, and a conversation with the team

How to stand out

Send us something you've built, broken or written: a repo, a CTF write-up, a bug report, a blog post, a detection rule. We care far more about how you think and how you learn than about the exact list of tools on your CV.

Why join Clara

At Clara, you’ll have the autonomy, speed, and support to make meaningful impact — not just on your team, but on how organizations are run across Latin America.

Who we are

We’re the leading B2B fintech for spend management in Latin America.

Certified as one of the world's fastest-growing companies, a Great Place to Work , and a LinkedIn Top Startup .

Passionate about making Latin America more prosperous and competitive.

Constantly innovating to build financial infrastructure that enables each of our customers to thrive.

Product-led, high-talent-density culture — designed for builders who raise the bar.

Proud of our open, inclusive, and values-driven environment.