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Senior Security Infrastructure Engineer

SezzleBrazil, RemoteDV-Development
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Salary
Not listed
Job type
Full-time
Work mode
Remote
Posted
9 Apr 2026
Status
Open · checked 7d ago

About this role

The Senior Security Infrastructure Engineer position at Sezzle is a remote opportunity based in Brazil designed for experienced professionals seeking to strengthen cloud and application security. This role suits a hands-on technical expert ready to drive vulnerability management, threat detection, and infrastructure hardening across a dynamic fintech environment.

Role Overview

Sezzle is seeking a hands-on, high-impact Senior Security Infrastructure Engineer to help strengthen security posture across cloud infrastructure, applications, and developer workflows. This role offers a high degree of ownership and autonomy to identify risks, investigate issues, and drive meaningful security improvements. The professional will work across vulnerability management, detection engineering, supply chain security, and incident response. Operating in a fast-paced environment, the individual will dive into logs, analyze systems, validate findings, and work end-to-end to resolve issues while shaping future security capabilities.

Key Responsibilities

Lead and operate vulnerability management across infrastructure, platforms, and applications, driving remediation with engineering teams.
Build, operate, and mature SIEM/XDR capabilities, including log ingestion, detection rule development, and alert tuning.
Investigate and respond to security incidents across cloud infrastructure and applications with root cause analysis.
Design and implement detection strategies for suspicious activity and data exfiltration patterns.
Lead threat modeling exercises and security design reviews to identify risks early.
Apply deep expertise in AWS and Kubernetes to design, secure, and improve resilient cloud infrastructure.
Drive infrastructure and CI/CD hardening initiatives to reduce software and container supply chain risks.
Partner with engineering teams to improve secure development and deployment practices.
Support security controls aligned with PCI DSS, SOC 2, and other compliance requirements.
Develop and implement automation, including AI, to improve efficiency in security operations and response.

Requirements

6+ years of experience in security, software, or infrastructure engineering with cloud-based production systems.
Experience contributing to threat modeling and security design reviews.
Strong hands-on background in vulnerability management, scanning, triage, and remediation.
Experience working with SIEM platforms like Wazuh, Splunk, or ELK.
Practical experience triaging findings from vulnerability scanners and bug bounty programs.
Strong knowledge of AWS, Linux, and Kubernetes infrastructure security architecture and hardening.
Experience improving infrastructure security and mitigating software supply chain risks.
Familiarity with container and dependency security tools such as Snyk, Trivy, or Grype.
Knowledge of common security vulnerabilities and mitigations including OWASP and SANS.
Working knowledge of compliance frameworks such as PCI DSS and SOC 2.
Demonstrated experience working with Claude or equivalent large language model tools.

Nice to Have

Experience designing and tuning detection rules and reducing alert noise.
Strong understanding of cloud-native security controls like IAM and network segmentation.
Familiarity with log-based detection, telemetry pipelines, and security analytics.
Experience designing secure CI/CD workflows.
Ability to assess application and infrastructure risk and translate findings into actions.
Experience aligning technical security work with regulatory and compliance expectations.
Experience using automation and AI to reduce manual effort.

Skills and Tools

Languages: Python, Golang, TypeScript
Frontend: React
Cloud & DevOps: AWS, Kubernetes, Linux, Git, GitLab
Security Tools: SIEM (Wazuh, Splunk, ELK), Snyk, Trivy, Grype
AI Tools: Claude and equivalent large language model tools

Salary and Benefits

Compensation range of $5,000 to $9,500 USD per month in gross amount based on experience level.

About the Company

Sezzle is on a mission to financially empower the next generation by revolutionizing the shopping experience beyond payments. Blending cutting-edge technology with seamless, interest-free installment plans, the company makes shopping smarter and more accessible while driving real impact on merchant sales. Sezzle fosters an innovative, dynamic team passionate about creating a truly unique shopping journey for consumers and merchants alike.

How to Apply

Candidates should apply on the official company careers page.

Skills and tech stack

PythonAWSKubernetesReactTypeScriptGolang

Questions candidates ask

What is the monthly salary for the Senior Security Infrastructure Engineer role?

The gross salary range is $5,000 to $9,500 USD per month, determined by the candidate's experience level.

Is this position remote?

Yes, this role is remote and based in Brazil.

How many years of experience are required?

Candidates must have 6+ years of experience in security, software, or infrastructure engineering.

What specific cloud platforms and tools are utilized?

The role requires strong knowledge of AWS, Linux, and Kubernetes, alongside experience with SIEM platforms, container security tools, and large language models like Claude.

Are compliance frameworks part of the job responsibilities?

Yes, the position involves supporting and implementing security controls aligned with frameworks such as PCI DSS and SOC 2.

Ready to apply?

The application is on the official Sezzle careers page.

Apply on company site