{"id":1311906,"url":"https://alion.io/job/spangle-senior-fullstack-engineer","title":"Senior Fullstack Engineer","company":{"id":3780520,"name":"Spangle","domain":"spangle.ai","url":"https://alion.io/company/spangle","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Rippling","truth_index":{"grade":"B","score":75,"open_postings":4,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-09-28T05:45:00Z"}},"role":"Backend","role_family":"Backend","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":["Austin, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":129000,"max_usd":238000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":2304},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"ChatGPT","optional":false},{"name":"CI/CD","optional":false},{"name":"Claude Code","optional":false},{"name":"GCP","optional":false},{"name":"GraphQL","optional":false},{"name":"JavaScript","optional":false},{"name":"Next.js","optional":false},{"name":"OpenAI Codex","optional":false},{"name":"React.js","optional":false},{"name":"Tailwind CSS","optional":false},{"name":"TypeScript","optional":false}],"status":"live","first_seen_at":"2026-02-20T08:03:09Z","employer_posted_date":"2026-02-20","last_verified_at":"2026-09-28T23:51:58Z","board_verified":true,"closed_at":null,"days_open":220,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":219},"description":"About SpangleAI\nLaunched in 2025, Spangle AI is the agentic conversion layer connecting AI-led discovery to real-time conversion. We've partnered with enterprise brands like REVOLVE, Alexander Wang, and Steve Madden, delivering up to 50% conversion lifts and 2x ROAS improvements.\nWe recently closed a $15M Series A. Spangle won NRF’s VIP (Vendor in Partnership) Award for Best AI-Driven Marketing Solution and was recognized in Business of Fashion’s AI startups to Watch.\nFounded by serial entrepreneurs with 30+ years scaling AI and commerce at Amazon, Saks, and Gap, we're building the commerce infrastructure for the agentic era, where ChatGPT Shopping, Google AI Overviews, and Meta are reshaping how consumers discover and buy.\n The Role\nWe are seeking exceptional Senior Fullstack Engineers with deep expertise in client-side development to build our next-generation merchant experience platform.This role primarily focuses on: Client-side SDK development, Multi-tenant architecture, Enterprise integration frameworks and High-performance frontend systems.\nYou will also contribute strategically to backend systems, including data modeling, infrastructure\nplanning, and scalable deployment architecture.\nThis role is ideally based in Seattle, the Bay Area, or Austin, with flexibility for exceptional\ncandidates.\nWhat you'll own:\nClient-Side Platform & SDK Development: Design and implement reusable, distributed JavaScript/CSS SDK frameworks that enable seamless merchant integration across diverse retail environments. Build scalable multi-tenant frontend architecture that supports enterprise-grade customization and performance. \nFrontend Engineering: Develop high-performance, scalable, and accessible web applications using React, Next.js, and Tailwind CSS. Implement modern rendering strategies (SSR, SSG, ISR) to ensure optimal SEO and performance. \nAPI & Backend Integration: Partner with backend engineers to integrate frontend logic with RESTful APIs and GraphQL services. Ensure secure, resilient communication between client-side SDKs and backend systems.\nPerformance & Scalability Optimization: Drive performance improvements through code splitting, lazy loading, image optimization, caching strategies, and runtime efficiency tuning.\nCode Quality & Standards: Write clean, maintainable, and reusable code. Enforce best practices for accessibility (a11y), SEO, modular architecture, and automated testing.\nBackend & Infrastructure Support: Contribute to data modeling, database schema design, infrastructure planning, and cloud deployment (AWS/GCP). Support CI/CD processes and production monitoring.\nWhat We're Looking For\nExperience\n5+ years of professional software development experience\nProven experience building production-grade web applications in multi-tenant or enterprise environments\nExperience developing distributed client-side SDKs or embedded commerce tools is strongly preferred\nTechnical Skills\nExpert-level proficiency in JavaScript, TypeScript, and CSS\nDeep expertise inReact, Next.js, and Tailwind CSS\nProficient with the AI native coding tools such as cursor, codex and claude code\nStrong understanding of multi-tenant build systems and distributed JavaScript/CSS framework design.\nExperience with RESTful APIs and/or GraphQL integrations.\nSolid understanding of data modeling, database schema design, and backend architecture principles\nFamiliarity with cloud infrastructure (AWS or GCP) and modern DevOps practices\nStrong understanding of frontend performance optimization and rendering strategies\nOur Culture\nGenAI-native in how we build, sell, and operate\nHigh ownership, low overhead, and bias toward action\nFocus on speed, experimentation, and execution\nDeep emphasis on creating clear, demonstrable customer value\nPreference for builders and operators over hierarchy\nStrong belief in in-person collaboration\nWhy Spangle\nOpportunity to build foundational platform technology at a fast-growing AI startup\nDirect impact on product architecture and technical direction\nCompetitive salary with uncapped commission and equity\nBenefits: Health, dental, and vision insurance, 401(k), Unlimited PTO","description_format":"text","description_chars":4139,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity","Unlimited PTO","Vision insurance"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Commerce"],"lifecycle":[{"event":"open","at":"2026-09-26T16:55:14Z"}],"liveness":{"score":5,"band":"cold","label":"Long shot","p_open":1,"p_active":0.184,"p_room":0.28,"age_days":219,"expected_fill_days":23,"reasons":["conf:11","win:tail","crowd:"],"computed_at":"2026-09-28T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/spangle-senior-fullstack-engineer","json_url":"https://alion.io/job/spangle-senior-fullstack-engineer.json","meta":{"generated_at":"2026-09-29T00:47:24Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":696,"day_limit":5000,"remaining_today":4304,"minute_limit":60,"resets_at":"2026-09-30T00:00:00Z"}}}