Senior Full-Stack Engineer - Security Focused AI Health

Simulation 95; Menlo Park (CA); Hybrid; USD 180,000 - 240,000; Full time

Job summary

Simulation95 in Menlo Park is seeking a senior software engineer to build applications that support expert onboarding, data collection, document handling, review, and delivery across frontend, backend, APIs, and databases.

Security is central: you will implement authentication, authorization, secure sessions, and controls to protect customer and project data, with automated tests and code reviews as part of the workflow.

Qualifications

• Experience shipping and maintaining production applications across the full stack.
• Strong back-end development skills, including API design, relational databases, background processing, and third-party integrations.
• Experience implementing authentication and server-side authorization, with tests that prevent access to another user's or customer's data.
• Practical knowledge of injection, cross-site scripting, broken access controls, unsafe external requests, and other web app vulnerabilities.
• Experience deploying and troubleshooting cloud applications.
• Ability to work independently, explain technical tradeoffs, and communicate with technical and nontechnical colleagues.

Responsibilities

• Develop product features across user interfaces, back-end services, data models, and integrations.
• Implement authentication, authorization, secure sessions, and appropriate separation of customer, project, and user data.
• Build secure workflows for uploading, processing, storing, sharing, and deleting documents and data.
• Review designs and code for security weaknesses, explain their impact, and implement fixes.
• Add automated tests, dependency checks, secret scanning, and security checks to development and release workflows.
• Improve monitoring, audit trails, error handling, and recovery while keeping sensitive information out of logs.
• Investigate production failures, address vulnerabilities, improve performance, and document technical decisions.

Skills

Full stack

API design

Auth & security

Cloud deployments

Independent worker

Job description

Simulation95 in Menlo Park is seeking a senior software engineer to build applications that support expert onboarding, data collection, document handling, review, and delivery across frontend, backend, APIs, and databases.

Security is central: you will implement authentication, authorization, secure sessions, and controls to protect customer and project data, with automated tests and code reviews as part of the workflow.