Senior Frontend Software Engineer

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

You write clean, precise, and well-tested code and hold yourself to that standard without being asked.

You think carefully about performance, reliability, accessibility, and maintainability as you build.

You make sound tradeoffs under constraints and communicate them clearly to teammates.

You're drawn to complex data problems and enjoy turning them into interfaces that help users act quickly.

You take ownership of your work end-to-end — from design review to production — and take pride in delivering on your commitments.

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 exposure to graph databases or graph query patterns (e.g., Neo4j).

You have experience with real-time streaming data and live system visualization.

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

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

You have experience contributing to component libraries or design systems (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.