About OnePayOnePay is the consumer fintech trusted by millions of Americans to make money better.Our financial system is broken. High fees, low rates, and too few ways to actually grow your money. We’re fixing it. And we’re moving fast.We’re an all-in-one financial services platform that brings together banking, high-yield savings, credit cards, point-of-sale lending, investing, and crypto in one place. We also partner with employers, HCM providers, gig platforms, and others to deliver embedded financial services to millions of employees and frontline workers.We’re backed by Walmart, the world’s largest retailer, and Ribbit Capital, one of fintech’s most respected investors, giving us rare scale, distribution, and the opportunity to build something truly category-defining.But what really sets OnePay apart is how we move. Our customers don’t have time to wait… and neither do we. This place moves fast, and we’re looking for people who are:Ready to runHungry and driven by urgencyExceptional at what they do, with low egoComfortable operating in motionThe RoleOur Application Security Engineers play a pivotal role in safeguarding our platform, driving everything from designing secure AWS architectures to embedding automated threat detection that protects customer transactions. Your work will ensure we meet rigorous compliance standards (PCI, CCPA, GLBA) and maintain the highest levels of trust and reliability for our users.Perform secure code reviews and static/dynamic analysis; oversee remediation with dev teamsConduct threat modeling sessions and risk‑driven design reviews early in developmentAutomate repetitive security tasks—vulnerability triage, code scanning, tool orchestrationBuild and extend in-house AppSec automation frameworks or pentest toolingArchitect and implement secure AWS configurations (IAM roles/policies, encryption keys, VPC segmentation)Embed security into CI/CD pipelines and repos using policy-as-code tools (pre-commit hooks, SAST/SCA, IDE tool integrations)Secure container and orchestration environments (EKS, Kubernetes, Docker) per best practicesPartner with security architecture and detection teams (SIEM tuning, logging, telemetry alignment)Develop and enforce AppSec standards and patterns across product teams; iterate through feedback loopsSupport regulatory or compliance assessments (PCI, CCPA, GLBA) as neededYou Bring8–12 years’ experience in application security engineering, DevSecOps, or security platform engineeringSolid threat modeling and secure code review skills; SAST/SCA tool proficiencyExperience scripting automation (e.g. Python, Bash, PowerShell) to streamline AppSec tasksCapability to lead in-house AppSec frameworks or tooling developmentDeep familiarity with CVSS, MITRE ATT&CK frameworks, OWASP Top 10 and CWE taxonomyProven experience with AWS core services: IAM, KMS, VPC, EC2, RDS, EKSHands-on expertise in securing IaC and CI/CD pipelines; strong knowledge of policy-as-code toolingContainer security experience: Docker, Kubernetes, EKS-related threat surfacesStrong communicator, able to translate technical findings to non-technical stakeholdersTrack record of defining and institutionalizing security architecture patternsTools We UseWe use Node and TypeScript on the server, leveraging the NestJS framework within a microservice-oriented architecture running on Kubernetes and AWS. On the client side, we build and ship product features for iOS, Android, and web platforms using React Native. While you don’t need experience with our exact stack, familiarity with modern software engineering practices will help you ramp up quickly.What We OfferCompetitive base salary, stock options, and health benefits from Day 1401(k) plan with company matchRemote-friendly (US), flexible time off (FTO), and opportunities for growthA high-growth, mission-driven, inclusive culture where your work has real impactStandard Interview ProcessInitial Interview with Talent PartnerTechnical or Hiring Manager InterviewTeam InterviewExecutive InterviewOffer!Equal Employment OpportunityTo build technology and products that are used and loved by people and solve real-world problems, we need to build a team with many different perspectives and experiences. We are an equal opportunity employer. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We encourage candidates from all backgrounds to apply. Applicants in need of special assistance or accommodation during the interview process or in accessing our website may contact us at talent@onepay.com.