Sr. Software Engineer

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 a Senior Back-End Engineer for our Computer Backup Back-End Team. This team focuses on the back-end services of our Computer Backup product. In this role, you will build and maintain systems to back up and restore exabytes of data.

We are looking for an engineer who is knowledgeable in high-performance, highly multithreaded architectures. We value versatility and are looking for someone comfortable designing and working across any technology as our needs evolve.

Responsibilities:

• Design and develop highly scalable, performant services and APIs in a Java ecosystem.
• Integrate AI coding agents and frameworks into your workflow to accelerate development, refactor legacy components, and improve code quality.
• Own the full technical lifecycle, including estimation, design, development, and delivery.
• Collaborate across the organization to ensure project success. You will often engage with QA, Data Centers, Marketing, Product Management, Support, Legal/Compliance, and Security to gather necessary context and requirements to implement solutions correctly, help customers, and solve problems.
• Diagnose complex issues and maintain the stability of large-scale production systems.
• Collaborate across functional teams and provide technical leadership to foster engineering excellence.

Required Qualifications:

• A strong track record of proven project deliveries and successfully shipping complex software systems.
• 7+ years of experience with Java and a deep understanding of backend architecture.
• Professional experience incorporating AI-assisted development tools (e.g., Gemini, Cursor, Claude Code) into your engineering workflow.
• Experience with…

- Relational databases, such as MySQL/Vitess and SQLite
- Observability tools, such as Prometheus, Grafana, and OpenSearch
- Data formats: JSON, XML

• Comfort working in a cross-platform environment (we develop on MacBooks for software that runs on Linux, and we use Windows for some testing).
• Filesystem expertise with Ext4, NTFS, and HFS+ (nice to have).
• Solid understanding of HTTP principles and security best practices.
• A strong desire to learn and adapt to rapidly changing technologies and tools.

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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