Senior Security Infrastructure Engineer at Sezzle | Remote Fintech Cybersecurity Job 2026
Are you an experienced cybersecurity professional looking for a high-impact remote opportunity in the fintech industry? Sezzle is currently hiring a Senior Security Infrastructure Engineer to help strengthen its cloud infrastructure, security operations, vulnerability management, and incident response capabilities.
This fully remote position offers experienced security engineers the opportunity to work on large-scale cloud environments, collaborate with engineering teams, and build security systems that protect millions of users. The role combines technical expertise, strategic thinking, and hands-on security engineering, making it an excellent opportunity for professionals who want to advance their careers in cloud security and cybersecurity operations.
About Sezzle
Sezzle is a fast-growing financial technology company focused on empowering consumers through innovative payment solutions. Best known for its Buy Now, Pay Later (BNPL) platform, the company helps consumers make purchases through interest-free installment plans while helping merchants increase sales and customer engagement.
Over the years, Sezzle has expanded its technology ecosystem and continues to invest heavily in cloud infrastructure, cybersecurity, and engineering excellence. The company serves millions of users and processes significant volumes of financial transactions, making security a critical part of its operations.
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Position Overview
Job Title
Senior Security Infrastructure Engineer
Company
Sezzle
Employment Type
Full-Time
Work Arrangement
Remote
Location
Remote (Primarily advertised for professionals based in Brazil and selected international markets).
Salary
💰 $5,000 – $9,500 USD per month
Compensation is based on experience, technical expertise, and demonstrated leadership capabilities. This makes the role highly competitive compared to many remote cybersecurity positions currently available in the market.
About the Role
Sezzle is seeking a highly skilled security engineer who can help improve the company's overall security posture across cloud infrastructure, applications, and development environments.
The successful candidate will work on real-world security challenges involving:
- Vulnerability management
- Threat detection
- Security monitoring
- Incident response
- Cloud infrastructure security
- Supply chain security
- Compliance implementation
- Security automation
This role provides significant ownership and autonomy, allowing engineers to identify security risks, investigate threats, and implement long-term improvements across multiple systems.
Key Responsibilities
Vulnerability Management
The Senior Security Infrastructure Engineer will:
- Lead vulnerability management programs.
- Review internal and external security findings.
- Validate identified vulnerabilities.
- Coordinate remediation efforts with engineering teams.
- Monitor infrastructure and application security risks.
The goal is to continuously reduce the organization's attack surface and strengthen overall security resilience.
Security Monitoring and Detection
The successful candidate will:
- Build and improve SIEM and XDR systems.
- Develop detection rules and alerting mechanisms.
- Monitor security events across infrastructure.
- Investigate suspicious activities.
- Improve threat visibility and response capabilities.
Strong monitoring systems are essential for identifying and responding to threats before they become major incidents.
Incident Response
Responsibilities include:
- Investigating security incidents.
- Performing root cause analysis.
- Supporting incident containment and recovery.
- Implementing long-term corrective measures.
- Improving incident response procedures.
The role requires strong analytical and troubleshooting skills, particularly when dealing with complex cloud environments.
Cloud Infrastructure Security
The engineer will help secure:
- AWS cloud environments
- Kubernetes clusters
- Linux-based systems
- CI/CD pipelines
- Containerized applications
The position focuses heavily on designing secure and scalable infrastructure while maintaining operational efficiency.
Threat Modeling and Security Reviews
Additional responsibilities include:
- Conducting threat modeling exercises.
- Participating in security design reviews.
- Identifying architectural weaknesses.
- Recommending security improvements.
- Supporting secure software development practices.
These activities help identify risks early in the development lifecycle.
Security Automation
The successful candidate will:
- Develop automation tools.
- Improve detection workflows.
- Streamline incident response processes.
- Enhance operational efficiency through technology.
Automation plays a key role in modern cybersecurity operations, particularly in large-scale environments.
Required Qualifications
Applicants should possess:
Professional Experience
- Minimum of 6 years of experience in:
- Security Engineering
- Infrastructure Engineering
- Software Engineering
- Cloud Security
Candidates should have hands-on experience securing cloud-based production systems and managing real-world security challenges.
Technical Skills
Strong knowledge of:
- AWS
- Kubernetes
- Linux
- Vulnerability Management
- Security Monitoring
- Threat Detection
- Incident Response
- Cloud Security Architecture
- CI/CD Security
Experience with modern cloud security practices is highly desirable.
Security Tools
Experience with tools such as:
- Splunk
- Wazuh
- ELK Stack
- Snyk
- Trivy
- Grype
Knowledge of security frameworks including OWASP and SANS is also beneficial.
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Benefits
Working with Sezzle offers several advantages:
Competitive Compensation
The role offers a monthly salary ranging from $5,000 to $9,500 USD depending on experience and qualifications.
Remote Flexibility
Employees enjoy the flexibility of working remotely while collaborating with globally distributed teams.
Professional Development
Sezzle supports continuous learning and professional growth through exposure to cutting-edge technologies and large-scale fintech systems.
Impactful Work
Security engineers contribute directly to protecting financial systems and customer data used by millions of consumers worldwide.
Can Nigerians Apply?
✅ Possibly Yes
Although the role is primarily advertised for professionals located in Brazil and certain international regions, the position is fully remote. The job description does not explicitly prohibit applications from Nigeria. Interested Nigerian cybersecurity professionals with the required qualifications are encouraged to review the application requirements and submit an application if eligible.
How to Apply
Interested candidates can submit their applications through the official Sezzle job listing:
Application Link:
remoteok.com
Application Requirements
Applicants should prepare:
- Updated Resume or CV
- Professional LinkedIn Profile
- Relevant Security Certifications
- Portfolio of Security Projects (if available)
- Technical Experience Summary
Final Thoughts
The Senior Security Infrastructure Engineer role at Sezzle presents an excellent opportunity for experienced cybersecurity professionals seeking a challenging and rewarding position within the fintech sector. With competitive compensation, remote flexibility, and exposure to modern cloud security technologies, the role offers both career growth and meaningful impact.
Professionals with strong expertise in AWS, Kubernetes, Linux, vulnerability management, and incident response should strongly consider applying for this opportunity and becoming part of a company helping shape the future of digital finance.
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