Security Engineer
Nelo is a leading consumer fintech and e-commerce platform in Mexico, with $500MM in annualized GMV and $75MM in annualized revenue. Our mission is to increase the buying power of consumers in Latin America, and we are doing so by building a modern alternative to credit cards. Nelo has raised over $40M of venture capital from investors including Homebrew, Two Sigma Ventures and Susa Ventures. Nelo has additionally raised a $100M asset credit facility from Victory Park Capital. Our lean team includes experienced leaders from top technology companies including Uber, Amazon, Rappi, and DiDi. Security has been part of how Nelo builds software from day one. As we scale, we are creating a dedicated Security Engineer role with broad ownership across application security, cloud infrastructure, and internal controls.
This is a hands‐on role for someone who wants to define the security function rather than inherit it. You will decide where to invest, implement controls yourself, and balance risk against velocity in a fast‐moving lending business.



This role is in‐person at our Mexico City office in Condesa.
Design and implement security guardrails across cloud infrastructure and developer workflows
Improve IAM, secrets management, endpoint management, and access controls across production systems
Harden AWS infrastructure using Terraform and policy‐as‐code
Increase observability for security‐relevant events and anomalies
Treat security as an engineering problem
Write code, configs, and tooling to enforce controls
Replace manual reviews with automation wherever it makes sense
Run external security programs
Own penetration tests and the bug bounty program end‐to‐end
Build automated evidence collection so compliance does not become a recurring tax on the team
Review designs and PRs with a security‐first lens
You have built security programs at a startup before and know the difference between security theater and controls that actually reduce risk. Terraform, Pyt

📌 Senior Security Engineer (Ciudad de México)
🏢 Nelo
📍 Ciudad de México