Senior Software Engineer, Security Platform

Sezzle

. Design, build, and operate security engineering services primarily in Golang and Python on AWS and Kubernetes .

Posted 10/14/2026full-timeRemote • BrazilSenior💰 $5,000 - $9,500 per monthWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in security engineering services with a strong focus on Golang and Python, alongside hands-on experience in AWS and Kubernetes. Proficient in building event-driven systems and CI/CD pipelines while ensuring web application security and compliance with industry standards.

Highest-signal resume keywords

Golang ProficiencyPython ProficiencyEvent-Driven Systems ExperienceCI/CD Pipeline ToolingWeb Application Security Knowledge

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Security EngineeringBackend DevelopmentSASTSCASecret DetectionContainer SecurityIaC SecurityThreat ModelingAutomated TriageAI-Forward Engineering

Tools & Technologies

AWSKubernetesNATSGitLab CIOWASP Top 10

Industry Keywords

FintechPaymentsBNPLConsumer LendingPCI DSSSOC 2Software Supply-Chain IntegrityPolicy-as-CodeBug BountyVulnerability Report Triage

Tech Stack

Tools & technologies

AWSKafkaKubernetesPythonGo

About the role

Key responsibilities & impact

Design, build, and operate security engineering services primarily in Golang and Python on AWS and Kubernetes
Maintain, harden, and retire existing security services
Own the NATS event-driven platform, including contracts, consumers, delivery guarantees, and observability
Integrate scanners, finding system of record, tickets, and metrics
Own SAST, SCA, secret detection, container, and IaC security gates from tuning through enforcement
Build CI review agents, automated finding triage and verification, and remediation helpers
Automate triage-to-remediation workflows, including reproduction context, fix guidance, and routing
Participate in threat modeling and secure design reviews
Participate in the on-call rotation
Report to the Director of Information Security and collaborate with detection and response and network and zero trust engineers

Requirements

What you’ll need

6+ years of professional software engineering experience, including significant backend experience
Deployed significant changes to a production application in the past 30 days
Strong proficiency in Golang, plus working proficiency in Python
Hands-on experience building and operating event-driven or message-based systems (NATS, Kafka, or similar), including contracts, idempotent consumers, replay, and back-pressure
Hands-on experience building and operating CI/CD pipeline tooling; GitLab CI at fleet scale is a strong plus
Hands-on web application security knowledge, including the OWASP Top 10 in real code
Hands-on experience with SAST, SCA, and secret-scanning tooling, including tuning for acceptable signal-to-noise ratio
Demonstrated AI-forward engineering experience using AI tooling and building agentic workflows adopted by other engineers
Working knowledge of AWS and Kubernetes as deployment targets
Preferred: experience in fintech, payments, BNPL, or consumer lending
Preferred: working knowledge of PCI DSS and SOC 2
Preferred: software supply-chain integrity experience, including SBOM pipelines, dependency governance, artifact signing and provenance
Preferred: familiarity with policy-as-code and admission control
Preferred: exposure to bug bounty or external vulnerability report triage
Preferred: experience with system-level threat modeling