Staff / Principal Frontend Software Engineer

You care about building software that has real-world impact in high-stakes environments.

You lead with high standards and high support—clear feedback, strong mentorship, calm execution.

You think in systems: performance, reliability, accessibility, and maintainability are first-class concerns.

You make good tradeoffs under constraints and can explain them crisply to technical and non-technical partners.

You enjoy turning complex data into intuitive workflows that help users make decisions quickly.

You’re comfortable owning ambiguous problems end-to-end and driving them to measurable outcomes.

You default to secure engineering practices and treat trust, safety, and correctness as non-negotiable.

You have experience with complex data visualization (e.g., D3.js, Chart.js, or similar).

You have worked with graph databases and understand graph query patterns (e.g., Neo4j).

You have experience with real-time streaming data and production visualization of live systems.

You have experience in defense, security, or other mission-critical domains.

You have built UI experiences that surface AI/ML outputs in operational workflows.

You have experience with component library or design system development (e.g., Storybook).

Benefits What's on the table:

Health. Medical, dental, and vision plan options. Life / AD&D, disability coverage options.

Family. Paid parental leave for eligible full-time employees. 12 weeks for birthing parents, 4 for non-birthing parents, 6 weeks for adoptive, foster, or intended parents through surrogacy.

Vacation. Paid holidays and flexible PTO. Take what you need.

Retirement. 401(k) with pre-tax and Roth options. HSA/FSA options, dependent care FSA.

Benefits vary by location, role, and eligibility. Full plan details provided during the interview and offer process.

If this role sounds like you, apply and share with us your interest

Due to U.S. government contract and security requirements, this role is limited to U.S. citizens. Some positions may also require eligibility to obtain and maintain a U.S. Government security clearance. Any active clearance requirement will be listed in the role description.

Twenty is an equal opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, veteran status, disability, or any other protected status, consistent with applicable law.

If you need a reasonable accommodation during the hiring process, let us know and we will work with you.