Sr. Application Security Engineer

Why Keystone AI ? Keystone AI is a mission-driven financial software company that aims to create better customer experiences for distressed borrowers. Consumers today want personal, digital-first experiences that align with their lifestyles, especially when it comes to managing finances. Keystone AI ’s approach uses machine learning to engage each customer digitally and adjust strategies in real time in response to their interactions. The Keystone AI team includes inspired data scientists, financial services industry experts and customer experience fanatics building technology to serve people in a way that recognizes their unique needs and preferences as human beings and endeavoring toward ensuring nobody gets locked out of the financial system. The Opportunity We are seeking a talented and motivated Senior Application Security Engineer with a strong background in AWS and DevOps practices. In this role, you will be responsible for ensuringthe security of our applications throughout the development lifecycle. You will work closelywith engineering teams to identify and mitigate security vulnerabilities, implement securitybest practices, and contribute to the organization's overall security strategy. The ideal candidate will have excellent communication skills and the ability to collaborate effectively with cross-functional teams. What You'll Do: Security Integration : Work with development and DevOps teams to integrate security into the software development lifecycle (SDLC). Vulnerability Management : Identify, assess, and mitigate security vulnerabilities in applications, infrastructure, and cloud environments. AWS Security : Implement and maintain security controls in AWS, including IAM policies, security groups, VPC configurations, and monitoring. DevOps Security : Collaborate with DevOps teams to incorporate security best practices in CI/CD pipelines, including automated testing, secure code reviews, and infrastructure as code (IaC) security. Threat Modeling : Conduct threat modeling and risk assessments to identify potential security threats and develop mitigation strategies. Incident Response : Assist in developing and executing incident response plans, including identifying and responding to security incidents. Compliance & Best Practices : Ensure that all systems and applications comply with relevant security standards, regulations, and best practices (e.g., OWASP , NIST , ISO 27001).• Security Training: Provide security training and guidance to engineering teams to promote secure coding and infrastructure management practices. Continuous Improvement : Continuously monitor, evaluate, and improve security practices, tools, and processes. Who You Are: Bachelor’s degree in Computer Science, Information Security, or a related field, or equivalent experience. 8+ years of experience in application security or a related role. Strong experience with AWS security services and best practices. Experience with DevOps tools and practices, including CI/CD pipelines, containerization, and IaC. Proficiency in at least one programming language (e.g., Python, Go). Strong understanding of web application security (e.g., OWASP Top Ten) and secure coding practices. Familiarity with security tools and technologies such as SAST , DAST , SIEM, and WAFs. Ability to work well in a team environment and collaborate effectively with engineers, developers, and other stakeholders. AWS Certified Security – Specialty or similar certification. Experience with container security (e.g., Docker, Kubernetes). Familiarity with modern authentication and authorization protocols (e.g., OAuth, SAML, JWT). Knowledge of secure coding frameworks and libraries. What We Offer (Perks & Benefits) Flexible vacation Medical/dental/vision insurance Traditional/Roth retirement savings options Company-paid disability and life insurance Flexible Spending Account & Limited FSA Family-friendly parental leave, volunteer and voting time off On-demand wellness platform access for you and 5 friends and family PerkSpot discount program for 900+ merchants nationwide Remote Work, Travel Expectations & Physical Requirements: This role supports a global, cross-functional business and operates primarily in a Remote-First environment. However, flexibility outside of standard business hours and occasional local or international travel may be necessary for global operations support, company meetings, training, offsites, and collaborative projects. This position primarily involves computer-based work, requiring extended periods at a computer, participation in virtual meetings, and use of standard office technology. We will consider reasonable accommodations to enable individuals to perform the essential functions of the role. Maintaining a reliable internet connection and a professional work environment is expected. The ability to protect confidential company, employee, customer, and business information while working outside of a company office is also required. Personally Identifying Infor