Senior React Developer (Frontend)
Quick facts
- Type
- Full-time
- Location
- San Francisco, CA
- Experience
- 5+ years
- Skills
- Python, TypeScript, React
- Industry
- Information Technology — 671 open jobs
- Visa in listing
- H-1B
- Apply
- Free to apply — never pay anyone for a job offer or visa sponsorship
Job description
Senior React Developer (Frontend) Location: San Francisco/Milpitas, CA Reports to: Engineering Manager / Tech Lead H1B visa
About the Role
We're looking for a Senior React Developer to help build an intuitive, data-dense user interface for our SaaS platform, working closely with backend and design teams to turn complex data and workflows into clear, usable experiences.
Responsibilities
- Build and maintain the React application UI: dashboards, detailed data views, and multi-step workflows
- Design components for dense data (tables, charts, drill-downs) that stay clear and performant with large datasets
- Build interactive data visualizations using libraries such as Recharts, Visx, or ECharts
- Work closely with backend engineers to consume APIs, shape data contracts, and handle async/long-running operations
- Implement robust state management for complex, multi-step workflows
- Ensure UI correctness for data display — formatting, rounding, and precision must exactly match backend calculations
- Build responsive, accessible interfaces for a professional user base
- Write unit and integration tests (React Testing Library, Jest/Vitest, Cypress/Playwright) for critical UI flows
- Collaborate on API design and participate in code reviews and architecture discussions
Required Qualifications
- 5+ years professional experience with React, including hooks, context, and modern state management (Redux Toolkit, Zustand, React Query/TanStack Query, or similar)
- Strong experience with TypeScript in a production React codebase
- Experience building data-heavy UIs: tables, dashboards, filters, drill-downs, exports
- Experience integrating with REST APIs, including handling pagination, async/long-running jobs, and error states gracefully
- Experience with a charting/visualization library (Recharts, Visx, D3, Chart.js, or similar)
- Strong attention to detail with numeric/data formatting and precision
- Familiarity with testing frameworks for React (RTL, Jest/Vitest) and end-to-end testing tools
Preferred Qualifications
- Experience building UIs for regulated, compliance-sensitive, or high-accuracy domains
- Experience with design systems and component libraries (e.g., Tailwind, MUI, or a custom design system)
- Experience with role-based access control / permissioning in enterprise applications
- Experience collaborating with FastAPI or similar Python backends
- Exposure to exporting data to Excel/PDF from the frontend
Visa sponsorship record: Mavlra Corporation
Sponsors actively| Fiscal year | H-1B LCAs | USCIS approvals | USCIS denials | PERM |
|---|---|---|---|---|
| FY2026 | 1 | — | — | — |
| FY2025 | — | 1 | 0 | — |
| FY2024 | 1 | 4 | 0 | — |
✔ Mavlra Corporation filed 2 H-1B applications for this kind of role (Software Developers) in the period above.
Roles they sponsor most
- software developer2 LCAs · median $84k
Which visas can work for this job
Occupation: Software Developers (SOC 15-1252).
- Mentioned in the listing
H-1B
- H-1B cap-exempt employer
Regular cap-subject employer — a new H-1B needs to win the lottery in March (unless you already hold cap-counted H-1B status).
- TN (citizens of Canada and Mexico)
This kind of role may fit the USMCA profession “Computer Systems Analyst (or Engineer, for engineering-degree holders)” — it depends on the actual duties. No lottery, no cap; you need the matching degree or license.
- E-3 (Australia) and H-1B1 (Chile, Singapore)
Same degree requirement as H-1B, but no lottery and a separate quota that is rarely filled.
- O-1 (extraordinary ability)
For candidates with awards, publications, press, a high salary or critical roles at distinguished organizations. No cap, no lottery; the employer files a petition.
- STEM OPT extension (F-1 students)
Requires an E-Verify employer. We didn't find this company in the E-Verify list — ask HR.
Salary vs prevailing wage
Software Developers · San Francisco-Oakland-Fremont, CA. Annual prevailing wages set by the Department of Labor (OFLC).
| Level | Prevailing wage | H-1B lottery odds* |
|---|---|---|
| Level I | $137,093 | ~15% |
| Level II | $165,131 | ~31% |
| Level III | $193,149 | ~46% |
| Level IV | $221,187 | ~61% |
The listing has no salary, so we can't place it on a wage level. Ask the employer which wage level they'd file at: Level III–IV registrations get 3–4 entries in the H-1B lottery.
* Odds are DHS projections for the FY2027 wage-weighted lottery (actual results vary by year and employer). Since the FY2027 cap season the H-1B lottery is weighted by wage level: Level I = 1 entry, II = 2, III = 3, IV = 4. The level is set by the offered wage against the prevailing wage for the occupation and worksite. Separately, a $100,000 fee for new H-1B petitions for workers outside the US was announced in 2025; as of September 2026 a federal court ruling keeps it unenforceable while appeals continue — check the current status.
Sources: U.S. Department of Labor OFLC disclosure data (H-1B/H-1B1/E-3 LCA, PERM), OFLC prevailing wage data, USCIS H-1B Employer Data Hub, E-Verify participating employers. Data loaded: LCA FY2024–FY2026, PERM, USCIS Data Hub, OFLC wages; updated 2026-10-03. Employers are matched by name, so records of companies with similar names can occasionally be mixed up. This is general information, not legal advice — talk to an immigration attorney about your case.