or apply directly on Five9's site. We never take the application ourselves.
Is this posting real?
- This role has been open
- 54 days Five9's roles stay open a median of 55 days
- Reposted
- No
- Salary listed
- No 0% of Five9's roles list one
- Ghost-job risk at Five9
- high 87 stale, 4 reposted of 124 open
- Hiring momentum
- 210 roles opened in the last 90 days ↑ up vs. the prior 90 days
- Last confirmed on the employer's board
- 2026-09-27
Measured from postings appearing on and disappearing from Five9's own greenhouse board since 2026-08-03. Full hiring picture for Five9.
About this role
The Sr Software Engineer - UI role at Five9 focuses on designing and building responsive user interfaces using React, TypeScript, and other technologies. The position emphasizes collaboration on feature development, with an expectation for the engineer to gradually take on full stack responsibilities. The role also involves using AI-assisted tools to enhance development efficiency and participating in code reviews and architectural discussions.
- benefits
- 1/5
- freshness
- 1/5
- career value
- 4/5
- role clarity
- 4/5
- pay transparency
- 0/5
Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of Five9 as an employer.
What you need
- 5+ years of post-internship experience with React and TypeScript
- Solid JavaScript/TypeScript, HTML, CSS
- Knowledge of UI Component Libraries, Web Accessibility, Internationalization
- Ability to work with test libraries (Jest, Playwright)
- Proficient in React, TanStack, Zustand
- Engineering focus
Nice to have
- AI Tools
- Micro Front End Architecture
- Java/Springboot
- Database SQL/NoSQL
Worth weighing
- Hybrid role requiring 3 days a week in office
- Emphasis on AI-assisted development tools may require adaptation to new workflows
Summarised from Five9's posting. Read the full original.
Listed by Five9 on their greenhouse job board, last confirmed open on 2026-09-27. PitchMeAI is not the employer.
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