{"id":437762,"url":"https://alion.io/job/finix-senior-frontend-engineer","title":"Senior Frontend Engineer","company":{"id":171797,"name":"Finix","domain":"finix.com","url":"https://alion.io/company/finix","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"A","score":88,"open_postings":18,"ghost_share":0,"stale_share":0.5,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-25T05:49:26Z"}},"role":"Frontend","role_family":"Frontend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["San Francisco, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":160000,"max":235000,"currency":"USD","period":"year","gross":null,"usd_annual":235000},"salary_estimate":null,"experience_years_min":6,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"JavaScript","optional":false},{"name":"React.js","optional":false},{"name":"Recoil","optional":false},{"name":"Redux","optional":false},{"name":"Rest API","optional":false},{"name":"Sass","optional":false},{"name":"State Management","optional":false},{"name":"TypeScript","optional":false},{"name":"Zustand","optional":false},{"name":"AWS","optional":true},{"name":"Docker","optional":true},{"name":"Kubernetes","optional":true}],"status":"live","first_seen_at":"2025-09-24T00:18:07Z","employer_posted_date":"2025-09-24","last_verified_at":"2026-10-25T06:09:51Z","board_verified":true,"closed_at":null,"days_open":396,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":396},"description":"As a Senior Frontend Engineer on our Frontend Engineering Team, you'll architect and build the core payment experiences that power thousands of businesses. You'll develop our comprehensive payments management dashboards and embeddable components that merchants integrate directly into their applications.\nIn this role, you'll drive the technical vision for customer-facing products from conception to production. You'll lead design and implementation decisions while ensuring our payment interfaces remain performant, secure, and intuitive as we scale. Our engineering team operates with high autonomy and ownership-each engineer makes meaningful contributions that directly impact customer success in our dynamic fintech environment.\nFinix is looking for engineers who bring exceptional technical acumen, attention to detail, passion for growth, and an obsession with delivering an exceptional customer experience.\nYou Will:\nBuild and maintain sophisticated payment dashboards and transaction management interfaces\nBuild performant, accessible, and reusable component libraries that scale across multiple products\nLead technical design sessions and drive frontend architecture decisions\nOptimize application performance for high-volume financial data processing\nCollaborate with Product, UX, and Engineering teams to translate complex payment workflows into intuitive user experiences\nMentor engineers and establish frontend development standards and best practices\nYou Are:\nExperienced in balancing rapid feature delivery with code quality, testing, and maintainability\nSkilled at translating business requirements into scalable technical solutions\nProactive in monitoring live systems and troubleshooting production issues\nComfortable working with ambiguous requirements and driving clarity through technical discovery\nCommitted to knowledge sharing and building team capabilities through documentation and mentorship\nYou Have:\n6+ years of production experience with modern web technologies (HTML, CSS/SCSS, JavaScript/TypeScript)\n3+ years of hands-on React development in complex, data-heavy applications\nSolid experience with state management solutions (Redux, Zustand, Recoil, or similar)\nStrong background in testing strategies and frameworks\nExperience building responsive, accessible web applications\nUnderstanding of RESTful APIs and modern build tools\nBonus if you have:\nExperience in payments, fintech, fraud prevention, or financial services\nBackend development experience with Java/Spring, Docker, Kubernetes, or 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