Senior Security Engineer - AI-Driven Fintech Platform

Remote; San Francisco (CA); On-site; USD 170,000 - 230,000; Full time

Job summary

Flex is hiring its first security engineer to safeguard money-moving systems, including ledger write paths, card issuing, payouts, and stablecoin work. You’ll own risk decisions, build automation, and drive security in design reviews with CTO-level exposure. A fast-paced fintech environment demands practical security and scalable automation.

Compensation ranges from $170,000 to $230,000 per year, plus equity, with a strong emphasis on velocity and responsible risk management.

Qualifications

• Proven hands-on software security and engineering.
• Experience securing cloud-native systems at scale.
• Familiarity with threat modeling and risk-based prioritization.

Responsibilities

• Threat model the money-moving paths and high-risk flows.
• Build secure-by-default infrastructure and guardrails.
• Develop just-in-time least-privilege cloud access systems.

Skills

Software engineer mindset

Python

Go

TypeScript

Cloud security

AWS or GCP

Terraform

CI/CD

Tools

Terraform

IaC

CI/CD pipelines

Kubernetes

Job description

Flex is hiring its first security engineer to safeguard money-moving systems, including ledger write paths, card issuing, payouts, and stablecoin work. You’ll own risk decisions, build automation, and drive security in design reviews with CTO-level exposure. A fast-paced fintech environment demands practical security and scalable automation.

Compensation ranges from $170,000 to $230,000 per year, plus equity, with a strong emphasis on velocity and responsible risk management.