Twenty

Staff/Principal Backend Software Engineer

Twenty
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16 hours ago

Base Salary

$192k - $455k/yr

Responsibilities

  • Architect and build high-throughput backend services for real-time operational data.
  • Lead technical design reviews and make pragmatic architecture and implementation decisions.
  • Design resilient, observable, performance-tuned event-driven and distributed systems.
  • Define stable APIs and collaborate with frontend teams on integration.
  • Improve code reviews, engineering standards, testing strategy, CI/CD workflows, and incident practices.
  • Troubleshoot complex production issues, lead incident response, and implement durable fixes.
  • Partner with product and operational stakeholders to translate needs into technical plans.
  • Contribute to backend technical strategy and roadmap planning.
  • Mentor engineers and support hiring through interviews and defining engineering standards.

Requirements

  • 10+ years of experience building scalable backend systems in production environments.
  • 4+ years of experience with Go, or equivalent experience writing server-side business logic in Java, Kotlin, C#, Python, C, C++, or Rust with strong systems-design aptitude.
  • Experience leading technical initiatives end to end, including architecture, execution, and delivery.
  • Experience designing distributed systems, including event-driven architectures, messaging, and consistency tradeoffs.
  • Experience building and operating cloud-native services in production; AWS experience is preferred.
  • Strong security fundamentals including secure coding, threat modeling, and defensible design.
  • Track record of mentoring engineers through code reviews, technical guidance, and feedback.
  • Strong communication skills and ability to align teams around technical decisions.
  • Experience with graph databases such as Neo4j or AWS Neptune is preferred.
  • Experience with relational databases such as Postgres, MySQL, or MariaDB and query-performance analysis is preferred.
  • Experience with defense, intelligence, or security-focused products, large-scale data processing, ML/AI integrations, open-source contributions, or relevant personal projects is preferred.

Benefits

  • Medical, dental, vision, life/AD&D, and disability coverage options.
  • Paid parental leave for eligible full-time employees, including 12 weeks for birthing parents, 4 weeks for non-birthing parents, and 6 weeks for adoptive, foster, or intended parents through surrogacy.
  • Paid holidays and flexible PTO.
  • 401(k) with pre-tax and Roth options, plus HSA/FSA and dependent-care FSA options.
  • Full-time, onsite role in Arlington, Virginia; U.S. citizenship is required, and some positions may require eligibility for a U.S. government security clearance.

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51-200 employees
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