{"id":69710,"url":"https://alion.io/job/langchain-senior-frontend-platform-engineer-design-systems","title":"Senior Frontend Platform Engineer, Design Systems","company":{"id":4855,"name":"LangChain","domain":"langchain.com","url":"https://alion.io/company/langchain","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":89,"open_postings":49,"ghost_share":0,"stale_share":0.224,"repost_share":0,"time_to_fill_p50_days":72,"computed_at":"2026-10-21T05:46:15Z"}},"role":"Frontend","role_family":"Frontend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["New York, United States","Boston, United States"],"countries":["US"],"hiring_countries":["US"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":144000,"max_usd":262000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":58},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Cloudflare","optional":false},{"name":"CSS Modules","optional":false},{"name":"LangChain","optional":false},{"name":"LangGraph","optional":false},{"name":"LangSmith","optional":false},{"name":"LLM","optional":false},{"name":"Monday.com","optional":false},{"name":"React.js","optional":false},{"name":"Sass","optional":false},{"name":"Storybook","optional":false},{"name":"Tailwind CSS","optional":false},{"name":"TypeScript","optional":false},{"name":"AI Agents","optional":true},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-08-22T02:01:29Z","employer_posted_date":"2026-08-22","last_verified_at":"2026-10-21T05:50:15Z","board_verified":true,"closed_at":null,"days_open":60,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":60},"description":"About Us\nAt LangChain, our mission is to make intelligent agents ubiquitous. We build the foundation for agent engineering in the real world, helping developers move from prototypes to production-ready AI agents that teams can rely on. We began as widely adopted open-source tools and have grown to also offer a platform for building, evaluating, deploying, and operating agents at scale.\nWith $125M raised at Series B from IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures, we’re at a stage where we’re continuing to develop new products, growth is accelerating, and all team members have meaningful impact on what we build and how we work together. LangChain is a place where your contributions can shape how this technology shows up in the real world.\nToday, our platform includes LangSmith (Observability, Evaluation, Deployment, Fleet, and Sandboxes), our open source frameworks (LangChain, LangGraph, and Deep Agents), and the newly launched LangSmith Engine for autonomous agent improvement. We have 100M+ monthly open source downloads, 6,000+ active LangSmith customers, and 5 of the Fortune 10 use LangSmith in production (+ 35% of the Fortune 500 overall), including teams at Klarna, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, Vanta, LinkedIn, Monday.com, Nvidia, and Bridgewater.\nAbout the Role:\nThis role can be based remotely in the U.S. Ideally SF, NYC, or Boston.\nLangChain is building the infrastructure that powers the next generation of AI applications. Our tools are used by thousands of developers and teams to build, debug, and ship production-grade LLM-powered products.\nAs our product surface area grows, so does the need for a cohesive, scalable, and high-quality UI foundation. That’s where Design Systems comes in. We’re looking for a Design Systems Engineer to help build, own, and evolve LangChain’s component library -the foundation that our frontend teams rely on to ship fast without sacrificing quality, accessibility, or consistency.\nThis role sits at the intersection of Design and Engineering. You’ll work closely with designers, product engineers, and platform teams to turn design intent into robust, reusable components and tooling that scale across the product.\nYou’ll have ownership, influence, and your work will be directly consumed across LangChain’s products.\n\nWhat You'll Do:\nBuild out LangChain’s component library\nDesign and implement reusable, composable React components that are flexible, accessible, and production-ready\n\nPartner closely with designers to translate design systems, tokens, and interaction patterns into code\n\nBuild reliable UI quality systems\nDevelop design system tooling and improve workflows around theming, tokens, versioning, testing, and component discovery (e.g. Storybook)\n\nMake thoughtful architectural decisions that enable accessibility, performance, consistency, and maintainability across LangChain’s UI stack\n\nImprove UI build and test workflows\nOptimize build performance, bundling strategy, and package versioning for the component library\n\nMaintain tooling for testing, dependency management of the UI app\n\nWhat You'll Bring:\nExtensive experience building modular, composable, and well-documented component libraries and/or design systems\n\nDeep knowledge of React, TypeScript, HTML, and CSS, f amiliarity with: styling approaches (CSS Modules, CSS-in-JS, Tailwind, Sass, etc.) and design system toolings (Storybook, Chromatic, tokens pipelines, etc.)\n\nExperience collaborating closely with designers and non-engineering partners\n\nStrong attention to detail and a high bar for craft and genuine passion for accessibility and inclusive design\n\nFamiliarity with testing UI components and visual regression testing\n\nAnnual salary range: $180,000 - $240,000\nCompensation Philosophy:\nWe offer competitive compensation that includes base salary, variable compensation for relevant roles, meaningful equity, benefits, and perks.\nWe are hiring for this role across a range of scope, and the compensation band reflects that. Your offer depends on what we learn about your impact, craft, leadership, and communication during the interview process. We will tell you early where you’re tracking and talk comp with you before offer stage. Team members in the EU, UK, and APAC receive locally competitive benefits aligned with regional norms and regulations.\nBenefits\nBenefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US and more.","description_format":"text","description_chars":4495,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"},{"name":"New York","iso":null,"kind":"city"},{"name":"Boston","iso":null,"kind":"city"}],"hiring_excludes":[],"relocation_offered":false,"industries":["LLM & Generative AI","AI Agents","AI Development Tools","AI Evaluation & Observability"],"lifecycle":[{"event":"open","at":"2026-08-22T02:01:29Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 17","filings_12m":17,"filings_prev_12m":2,"green_card_filings_12m":0,"median_offered_wage_usd":172500,"route":null,"cap_exempt":false,"checked_at":"2026-10-15T11:24:14+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)"],"filings_for_role_12m":14}],"liveness":{"score":45,"band":"ok","label":"Likely open","p_open":1,"p_active":0.753,"p_room":0.6,"age_days":60,"expected_fill_days":72,"reasons":["conf:3","velocity","win:late","crowd:brand"],"computed_at":"2026-10-21T05:46:15Z"},"pay":null,"html_url":"https://alion.io/job/langchain-senior-frontend-platform-engineer-design-systems","json_url":"https://alion.io/job/langchain-senior-frontend-platform-engineer-design-systems.json","meta":{"generated_at":"2026-10-21T06:30:36Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":9274,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-22T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":4855},"rest":"https://alion.io/mcp/rest/get_company?id=4855"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Flangchain-senior-frontend-platform-engineer-design-systems"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Flangchain-senior-frontend-platform-engineer-design-systems"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Flangchain-senior-frontend-platform-engineer-design-systems"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/langchain-senior-frontend-platform-engineer-design-systems\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Flangchain-senior-frontend-platform-engineer-design-systems"}]}