Sr. Software Engineer - Application Security
About Backblaze
Backblaze provides reliable, high-availability cloud storage trusted by consumers, SMBs, enterprises, and developers in over 150 countries. Backblaze B2 Cloud Storage supports data-intensive workloads including backup, media, analytics, and modern AI pipelines. Our teams focus on building secure, durable, scalable systems with a strong emphasis on application security from day one and protecting customers to keep them safe.
But while there is a lot to celebrate in our past, there is almost as much opportunity ahead of us.
About the Role
We are seeking an Application Security Engineer to improve application security across the software used to enable Backblaze B2 Cloud Storage and Computer Backup. The primary role is to build security into how the product is used, how data is stored and how customers can use it. This role will require development skills and application security knowledge to build security into the product and new features. Leveraging AI is key.
This is a hands-on role that requires application development knowledge. This role is expected to know and use the latest AI to help with both development and security. The primary requirements include; development in common web languages, application security and AI tool usage.
Leverage AI tools and software for
Building new and maintaining existing software security features
Meeting evolving software security needs in existing software
Developing new components as needed
Perform security assessments and code reviews on internal and external customer-facing applications
Work closely with engineers to remediate security vulnerabilities using AI tools
Develop security automation and tooling to improve security
Support bug bounty program and vulnerability handling
Investigate newly reported vulnerabilities
Determine ways to remediate them
Provide guidance to engineering based on known vulnerabilities found in existing applications
Understanding cryptography and secure authentication
Knowledge of cloud environments and security they provide
Support and develop on large software stack using
Apache Tomcat running across a large number of servers
JavaServer Pages (JSP) containing older features
Node/JavaScript developed features and pages
An architecture split among many different servers – supporting browsers and custom client software
Strong security knowledge across large software stacks running on multiple servers
Ability to reach out and learn about technologies or implementations as necessary
The Right Fit:
Application Development and Security knowledge
AI knowledge and experience using it for development & security
Understanding of: AI Frameworks and tooling, core web security, common web security flaws, coding agents
Strong understanding of OWASP Top 10 vulnerabilities
Experience with security testing tools such as:
SAST / DAST scanners
Fuzzing tools
Vulnerability scanners
Familiar with web technologies: HTTP, REST APIs, etc.
Experience with Web Applications, Cloud Systems and Linux Environments
Determining how new and old security needs can leverage AI workflows and integrations to improve them
AI Coding tools such as Gemini, Claude Code, ChatGPT, Cursor or others
Experience with programming languages such as: Java, JSP, JavaScript, TypeScript, Go, Python and C/C++
Why Backblaze
Build secure software used by companies worldwide
Work at the intersection of AI, data, and cloud storage
Collaborate with experienced engineering, security, product, and QA teams
Competitive compensation and benefits
Remote-first culture supporting work-life balance
At this point, we hope you're feeling excited about the job description you're reading. Even if you don't meet every requirement, we still encourage you to apply. Learning, developing, and growing are key parts of our culture. We're eager to meet people who believe in our mission and can contribute to our team in various ways. We want people to feel comfortable expressing their true selves and to come, stay, and do their best work here.
At Backblaze, we value being fair and good to our customers, partners, and employees. That’s why diversity, equity, and inclusion are at the core of our values. We are committed to fostering a workforce where all employees feel a sense of belonging regardless of race, ethnicity, nationality, gender, sexual orientation, age, religion, socio-economic status, ability, veteran status, and education. We believe that our dedication to cultivating a diverse workspace not only allows us to better serve our customers in over 175 countries but further reinforces our commitment to doing the right thing. We are proud to be an Equal Opportunity Employer.
To understand more about the data we collect and process as part of your application, please view our Backblaze Employee Privacy Notice.
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