Twenty

Staff / Principal Backend Software Engineer

Twenty
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1 year ago
Arlington, VA, USA or New York, NY, USAStaff+

Base Salary

$192k - $455k/yr

Responsibilities

  • Architect and build high-throughput backend services for real-time operational data.
  • Lead technical design reviews and make architecture and system-improvement decisions.
  • Design resilient, observable, performance-tuned event-driven and distributed systems.
  • Define stable APIs and partner with frontend teams on integration.
  • Improve engineering standards through code reviews, testing strategy, incident practices, and technical guidance.
  • Build and maintain CI/CD workflows for rapid and secure delivery.
  • Troubleshoot production issues, lead incident response, and drive durable fixes.
  • Translate product and operational needs into technical plans and contribute to backend strategy and roadmap planning.
  • Mentor engineers and support hiring through interviews and evaluation standards.

Requirements

  • 10+ years building scalable backend systems in production environments.
  • 4+ years of experience in Go, or equivalent server-side or systems-language experience with strong system 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.
  • A track record of mentoring engineers through code reviews, technical guidance, and feedback.
  • Strong communication skills and the ability to align teams around technical decisions.
  • Preferred experience with graph databases such as Neo4j or AWS Neptune.
  • Preferred experience with relational databases such as Postgres, MySQL, or MariaDB and query-performance reasoning.
  • Preferred experience with defense, intelligence, or security-focused products, large-scale data processing, or practical ML/AI integrations.
  • Open-source contributions or personal projects demonstrating strong engineering craft are preferred.
  • U.S. citizenship is required; some positions may require eligibility to obtain and maintain a U.S. Government security clearance.

Benefits

  • Medical, dental, vision, life/AD&D, and disability plan 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.
  • The role is full-time and on-site in Arlington, Virginia; benefits vary by location, role, and eligibility.

Tech Stack

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About Twenty

51-200 employees
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