Software Engineer III - B2

About Backblaze

Backblaze is the object storage leader in the open cloud movement, fueling customer success with cloud storage built purposefully to unlock budgets, unburden administrators, and unleash innovators. Together with our partners, we’re helping customers break free from the restrictive, overpriced legacy solutions that hold them back, and blaze forward with the full power of the open cloud in their hands.

Founded in 2007, we scaled the business with less than $3 million in outside funding until 2021, when we did a traditional IPO on the Nasdaq stock exchange. Today, Backblaze generates over $100m in revenue and is the leading specialized storage cloud—managing over three billion gigabytes of data storage for 500K+ customers in 175+ countries, including businesses, developers, IT professionals, and individuals.

While there is a lot to celebrate in our past, there is even more opportunity ahead of us. As we are continuing to grow, we’re seeking a Sr. Software Engineer - B2 Object Storage to join our team!

What You'll Do

You will work on B2 APIs and subsystems that allow our customers and integrations to upload objects, manage object lifecycles, track usage, and interact with our billing and storage systems. You will help build new features, improve the scalability of our systems, and build internal observability tooling.

Key Responsibilities

• Design, implement, and maintain B2 and S3-compatible APIs to ensure correctness, performance, and backward compatibility for a large base of external customers and integrations.
• Lead technical design discussions and produce clear design documents.
• Instrument services, develop metrics, define meaningful SLIs/SLOs, and drive reliability improvements.
• Actively participate in an on-call rotation to help determine incident root causes and identify follow-up remediation items.

Qualifications

• 7+ years of server-side Java programming experience with a strong background in algorithms and data structures.
• Experience writing software for large-scale distributed systems, including design, implementation, testing, and rollout.
• Communicates proactively in a remote environment by keeping the team informed, surfacing blockers early, and moving work forward.
• Professional experience incorporating AI-assisted development tools (e.g., Gemini, Cursor, Claude Code).

Bonus Points

• Experience with Cassandra and Vitess.
• Agile and Scrum experience.

Diversity, Equity, & Inclusion

At Backblaze, we value being fair and good to our customers, partners, and employees. 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 are proud to be an Equal Opportunity Employer.