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Senior Backend Engineer

Antithesis· Engineering
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Vienna, VA, USAFull-timePosted 2mo ago

About the role

Senior Backend Engineer on the Platform team, responsible for designing and owning core platform systems end-to-end, from low-level data storage and APIs to external interfaces, with emphasis on correctness, performance, and reliability.

Responsibilities

  • Design, build, and operate core platform systems — including backend infrastructure, data processing pipelines, storage layers, and the scalable APIs, integrations, and interfaces that power internal and external consumers.
  • Contribute to Pangolin, our purpose-built database designed from the ground up to meet the unique demands of our platform.
  • Build and evolve foundational platform primitives such as data access layers, authorization frameworks, and service orchestration.
  • Own reliability end-to-end — from system design and capacity planning to incident response, with a sustainable on-call rotation shared across the team.
  • Identify and resolve performance bottlenecks across the stack; mentor engineers; contribute to long-term technical strategy.

Qualifications

  • 5+ years of software engineering experience. Rust is a strong preference, but exceptional systems engineers from other backgrounds are welcome.
  • 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 — you care about correctness, test coverage, and well-designed abstractions.
  • Bonus: query planning/optimization experience, multi-tenant platform or authz background, C/C++ familiarity, or open-source contributions.

Skills

Required:Backend API designDistributed systemsPerformance optimizationRust
Nice to have:Data storage / storage engines
Last updated Aug 19, 2026. Interested? Apply on the company site.
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About Antithesis

Bug-free systems, unlimited velocity: Unleash your agents

Antithesis de-risks agentic development of critical systems. Our platform runs your complete system, exhaustively analyzes its behavior, and exposes bugs as quickly as agents introduce them. We arm your team with a root cause and a perfect reproduction of every issue found.

Autonomous testingDistributed systems reliabilityDeterministic simulation testingProperty-based testingAutonomous testing primerTechniques to improve software testing
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