Senior Backend Engineer

The role

You will design, build, and operate core platform systems including backend infrastructure, data processing pipelines, and storage layers. You will also contribute to Pangolin, a purpose-built database, and own reliability from system design to incident response.

What you will do

• Design, build, and operate core platform systems
• Contribute to Pangolin, a purpose-built database
• Build and evolve foundational platform primitives
• Own reliability end-to-end including capacity planning and incident response
• Participate in a sustainable on-call rotation
• Identify and resolve performance bottlenecks
• Mentor engineers
• Contribute to long-term technical strategy

Required qualifications

• 5+ years of software engineering experience
• Experience building APIs, services, storage engines, query engines, or data-intensive backend systems
• Deep understanding of distributed systems: consistency, fault tolerance, replication, observability
• Hands-on experience designing and shipping APIs with attention to correctness and contract stability
• Strong fundamentals in correctness, test coverage, and well-designed abstractions

Nice to have

• Rust is a strong preference
• query planning/optimization experience
• multi-tenant platform or authz background
• C/C++ familiarity
• open-source contributions

About the company

Antithesis runs entire software systems inside a deterministic simulation to improve software reliability. The company is well-funded and deeply technical.