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Oscilar

Senior Security Engineer

Oscilar

. Own threat modeling across our core platform APIs, risk decisioning and event-ingestion systems, and agentic AI products; harden multi-tenant isolation and data-handling across designs and PRs.

Posted 5/15/2026full-timeRemote • 🇧🇷 BrazilSeniorWebsite

Tech Stack

Tools & technologies
AWSJavaKubernetesPython

About the role

Key responsibilities & impact
  • Own threat modeling across our core platform APIs, risk decisioning and event-ingestion systems, and agentic AI products; harden multi-tenant isolation and data-handling across designs and PRs.
  • Design, implement, and deploy authentication, authorization (user and API), and RBAC across our platform: own and propose new approaches as we scale
  • Stand up our AppSec program from the ground up: SAST (Semgrep), SCA (Dependabot/Snyk), secret scanning, IaC scanning, and container scanning on Pulumi + EKS
  • Build guardrails around LLM usage — prompt-injection defenses, output validation, and cost and abuse monitoring on Bedrock/Anthropic/OpenAI calls
  • Drive security incident process, vulnerability triage, and the responsible-disclosure workflow
  • Write SECURITY.md, maintain a threat registry, and champion secure-by-default patterns across the engineering org
  • Partner with IT on shared areas — incident response across corporate and product, access reviews, and audit evidence collection
  • Collaborate with product and engineering teams on feature design, embedding security early rather than gating at the end
  • Keep us aligned with current security standards and trends (OWASP, MITRE ATT&CK, and emerging LLM/agent security guidance)

Requirements

What you’ll need
  • Strong software engineering fundamentals — 5+ years building software, with the last 3+ focused on application or product security, ideally at a fintech or data-heavy SaaS company
  • Strong hands-on Java and/or Python code review skills — you're comfortable in a PR, not just in a report
  • Experience with SSO, SAML, OAuth 2.0, JWT, mTLS, and JOSE; multi-tenant authZ; PII handling/tokenization
  • Working knowledge of AWS security primitives (IAM, KMS, Secrets Manager, VPC) and Kubernetes

Benefits

Comp & perks
  • 100% of your Medical/Dental (Care Plus) for you and your dependents
  • 100% Life / LTD (Prudential)
  • Caju Card for monthly meal allowance
  • Remote first culture.
  • Family-Friendly environment; Regular team events and offsites.
  • Unparalleled learning and professional development opportunities.
  • Making the internet safer by protecting online transactions.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools
threat modelingauthenticationauthorizationRBACSASTSCAIaC scanningcontainer scanningJavaPython
Soft Skills
collaborationincident responsevulnerability triagecommunicationchampioning security practices