Software Engineer III - B2 (Fully Remote)

Backblaze; United States; Remote; USD 140,000 - 230,000; Full time

Job summary

Backblaze is seeking an experienced backend engineer to design and implement B2 and S3-compatible APIs, focusing on correctness, performance, and backward compatibility. You will help lead design discussions and contribute to reliability through on-call rotations, with a strong emphasis on scalable, observable systems.

The role requires deep Java expertise, a track record with large-scale distributed architectures, and familiarity with AI-assisted development tools to accelerate delivery.

Qualifications

• 7+ years of server-side Java with strong CS fundamentals.
• Experience with large-scale distributed systems.
• Experience with AI-assisted development tools (e.g., Gemini, Cursor, Claude Code).

Responsibilities

• Design, implement, and maintain B2 and S3-compatible APIs for correctness, performance, and backward compatibility.
• Lead technical design discussions and produce clear design docs.
• Participate in on-call rotation to determine root causes and drive reliability improvements.

Skills

Java

Algorithms

Distributed systems

Remote communication

AI-assisted tooling

Tools

S3-compatible APIs

Job description

• Work on B2 APIs and subsystems for object upload, lifecycle management, and usage tracking.
• Build new features, improve scalability, and create internal observability tooling.

Responsibilities:

• Design, implement, and maintain B2 and S3-compatible APIs for correctness, performance, and backward compatibility.
• Lead technical design discussions and produce clear design docs.
• Participate in on-call rotation to determine root causes and drive reliability improvements.

The Right Fit:

• 7+ years of server-side Java with strong algorithms and data structures.
• Experience with large scale distributed systems and proactive remote communication.
• Experience with AI-assisted development tools (e.g., Gemini, Cursor, Claude Code).

Backblaze is an object storage leader in the open cloud movement, providing cloud storage to help customers unlock budgets and innovate. Founded in 2007, it has scaled to over $100m revenue, managing three billion gigabytes for 500K+ customers in 175+ countries, with a culture of growth and inclusion.