{"id":655641,"url":"https://alion.io/job/iongroup-principal-react-engineer-new-york","title":"Principal React Engineer, New York","company":{"id":678233,"name":"ION Group","domain":"iongroup.com","url":"https://alion.io/company/iongroup-2","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"C","score":68,"open_postings":69,"ghost_share":0.609,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":11,"computed_at":"2026-10-12T06:55:09Z"}},"role":"Frontend","role_family":"Frontend","seniority":"lead","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["New York, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":152000,"max_usd":276000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":34},"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"JavaScript","optional":false},{"name":"Python","optional":false},{"name":"React.js","optional":false},{"name":"TypeScript","optional":false}],"status":"live","first_seen_at":"2026-02-13T16:58:06Z","employer_posted_date":"2026-02-13","last_verified_at":"2026-10-12T14:51:17Z","board_verified":true,"closed_at":null,"days_open":241,"trust":{"level":"ghost","repost_count":0,"flags":["stale","company_stale"],"days_open":240},"description":"Lab49 is an award-winning specialist consultancy that creates bespoke technology in partnership with the most important companies in finance. We were founded in 2002 to bring Silicon Valley solutions to Wall Street’s door. Since then, we have worked on successive waves of technological change, including distributed computing, high-speed automation, enterprise UX and digital distribution (for which Lab49 was among the first significant practices established on Wall Street), DevOps, cloud and data science.\nToday, we are an established partner in financial markets, having delivered hundreds of projects for clients including all the world’s tier-one investment banks and many of the largest buy-side firms globally.\nBeing part of Lab49 means bringing your drive and creativity into an environment where your contributions will make immediate impact. Engineers will work in cross functional teams, consulting directly with our clients, shaping not only technical solutions to business problems but delivering them into production.\nThe Principal React Engineer will play a critical leadership role on a key project for a strategic Lab49 client.\nYou will work shoulder-to-shoulder with Product and UX experts from Lab49and our client. In addition to the Lab49 project team, you will collaborate with client product and engineering stakeholders to guide the discovery and build phase of an exciting new initiative.\nWhat you’ll be doing:\nPartnering with our client to lead the design and build of astructured products tradingUIusing modern web development technology and techniques. You willbe responsible formanagingengineeringdeliverables, and the relationships with other key contributors to deliver great software. \nDesign, document, and plan for the technical implementation and delivery of working software into production. \nAct as a hands-on engineer and architect to support ongoing project work. Lead and activelyparticipatein projects, serving as a role model for project teams and collaborating with other practices to ensure successful outcomes. \nPartner with client counterparts and stakeholders tomaintainand build relationships,maintaininga commercial approach. Develop strong relationships with clients as a strategic partner and technical advisor, contributing to expanding our footprint and securing follow-on work. \nPartner with the Lab49 business development team to create and deliver compelling pitches, defining problems, captivating clients, presenting solutions, and working out engagement terms. Build and reinforce your professional network through active engagement in industry events and public speaking opportunities. \nContribute to the Interactive Practice: The UI engineering team within Lab49. This means bringing your passion and opinionated view of what makes for great UI development to the wider UI engineering community within Lab49. \nAssist in developing effective management skills and practices among line managers in the Engineering practice, fostering strategic career planning and development for the engineering team as a whole. \nWhat you should have:\n10+ years of hands-on experience designing and building complex, commercial-grade software applications. \nA primary engineering skillset focused ondelivering UIs for digital products. \nExperience with JavaScript and TypeScript, with modern frameworks specifically React. \n5+ years of solid hands-on experience in Python or C# development. \nProventrack recordin effective leadership, problem-solving, and decision-making. \nExperience designing holistic technical solutions, managing integrations with third party services and APIs, and deploying applications into production. \nExperience collaborating with project teams and interacting with clients in finance, consulting, or start-up environments. \nA passion for technology and innovation, staying informed about the latest industry trends through active participation in industry events, meet-ups, and more. \nExperience with one or more cloud platforms with a working understanding of contemporary SDLC practices such as continuous delivery. \nStrong understanding of the value of testing, quality, continuous integration, source control, and code reviews. \nExperience in capital markets, financial markets/products, consulting is highly desirable.","description_format":"text","description_chars":4295,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Financial Software & Embedded Finance","Financial Data & Market Intelligence"],"lifecycle":[{"event":"open","at":"2026-09-10T20:52:54Z"}],"visa":[],"liveness":{"score":5,"band":"cold","label":"Long shot","p_open":1,"p_active":0.188,"p_room":0.28,"age_days":240,"expected_fill_days":11,"reasons":["conf:3","stale_co","velocity","ghost","win:tail","crowd:"],"computed_at":"2026-10-12T06:55:09Z"},"pay":null,"html_url":"https://alion.io/job/iongroup-principal-react-engineer-new-york","json_url":"https://alion.io/job/iongroup-principal-react-engineer-new-york.json","meta":{"generated_at":"2026-10-12T19:14:02Z","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":31162,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-13T00:00:00Z"}},"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":678233},"rest":"https://alion.io/mcp/rest/get_company?id=678233"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fiongroup-principal-react-engineer-new-york"},{"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%2Fiongroup-principal-react-engineer-new-york"},{"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%2Fiongroup-principal-react-engineer-new-york"},{"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/iongroup-principal-react-engineer-new-york\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fiongroup-principal-react-engineer-new-york"}]}