Senior Software Development Engineer Jobs in Folsom, CA

Keeper Security is hiring a Senior Software Development Engineer in Test (SDET) to focus on API and security testing for our enterprise‑grade applications. In this role, you will design, build, and maintain automated test frameworks and tooling to validate the quality, reliability, and security of Keeper’s APIs, SDKs, and automation workflows. This is a 100% remote position, with an opportunity for a hybrid schedule for candidates based in the El Dorado Hills, CA area.

Keeper’s cybersecurity software is trusted by millions of people and thousands of organizations globally. Keeper is published in 23 languages and sold in over 150 countries. Join one of the fastest‑growing cybersecurity companies and help ensure Commander remains reliable and trusted by developers and DevOps teams worldwide.

Keeper Security is one of the fastest‑growing cybersecurity software companies that protects thousands of organizations and millions of people in over 150 countries. Keeper is a pioneer of zero‑knowledge and zero‑trust security built for any IT environment. Its core offering, KeeperPAM®, is an AI‑enabled, cloud‑native platform that protects all users, devices and infrastructure from cyber attacks. Recognized for its innovation in the Gartner Magic Quadrant for Privileged Access Management (PAM), Keeper secures passwords and passkeys, infrastructure secrets, remote connections and endpoints with role‑based enforcement policies, least privilege and just‑in‑time access. Learn why Keeper is trusted by leading organizations to defend against modern adversaries at KeeperSecurity.com.

As a Senior SDET, you will play a critical role in ensuring the reliability, performance, and security of Keeper’s API services. You’ll work closely with developers, QA engineers, and product managers to design and implement automated test suites that validate API functionality, enforce secure access patterns, and proactively identify vulnerabilities or regressions across our platform.

• Lead the design, architecture, and implementation of scalable automated test frameworks for RESTful and GraphQL APIs, ensuring high reliability across distributed and microservice‑based systems
• Define and implement advanced API validation strategies, including authentication, authorization, rate limiting, and error handling
• Conduct security‑focused testing, including token validation, input fuzzing, and access control verification
• Own the integration of automated API and security test suites into CI/CD pipelines and ensure coverage across staging and production‑like environments
• Collaborate with developers to test API contract adherence and backward compatibility
• Lead the evaluation and testing of secure integrations with third‑party services and identity providers
• Analyze test failures and production incidents to continuously improve test coverage and reliability
• Mentor other automation engineers and contribute to automation architecture and roadmap planning

• 5+ years of experience in QA automation, with a strong focus on API testing
• Proficiency in tools such as Postman, REST Assured, or similar API test frameworks
• Experience scripting in Python or JavaScript
• Strong hands‑on experience developing automated tests using Pytest is required and experience with Jest testing is preferred
• Familiarity with OAuth2, JWT, API keys, and other authentication methods
• Understanding of common API vulnerabilities (e.g., OWASP API Top 10) and how to test for them
• Experience integrating automated tests into CI/CD GitHub Actions pipeline
• Solid understanding of HTTP, JSON, and common API protocols
• ECC & RSA encryption knowledge is desirable
• Strong communication and collaboration skills

• Experience with security‑focused testing tools (e.g., Burp Suite, OWASP ZAP)
• Exposure to security compliance frameworks (e.g., SOC 2, ISO 27001, FedRAMP)
• Familiarity with cloud services (e.g., AWS API Gateway, Lambda, Secrets Manager)
• Background in performance testing or load testing APIs

• Medical, Dental & Vision (inclusive of domestic partnerships)
• Employer Paid Life Insurance & Employee/Spouse/Child Supplemental life
• Voluntary Short/Long Term Disability Insurance
• 401K (Roth/Traditional)
• A generous PTO plan that celebrates your commitment and seniority (including paid Bereavement/Jury Duty, etc)

Keeper Security, Inc. is an equal opportunity employer and participant in the U.S. Federal E‑Verify program. We celebrate diversity and are committed to creating an inclusive environment for all employees.

Classification: Exempt