{"id":53637,"url":"https://alion.io/job/newtonx-senior-frontend-react-engineer","title":"Senior Frontend React Engineer","company":{"id":3688,"name":"NewtonX","domain":"newtonx.com","url":"https://alion.io/company/newtonx","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":null},"role":"Frontend","role_family":"Frontend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Medellín, Colombia"],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"CI/CD","optional":false},{"name":"React.js","optional":false},{"name":"Scrum","optional":false},{"name":"Stripe","optional":false},{"name":"Vite","optional":false},{"name":"Webpack","optional":false},{"name":"Cloudflare","optional":true},{"name":"GCP","optional":true},{"name":"JavaScript","optional":true},{"name":"Kubernetes","optional":true},{"name":"PostgreSQL","optional":true},{"name":"Python","optional":true},{"name":"React Query","optional":true},{"name":"Redux","optional":true},{"name":"Rest API","optional":true},{"name":"SQL","optional":true},{"name":"State Management","optional":true},{"name":"Terraform","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-08-12T15:02:30Z","employer_posted_date":"2026-08-12","last_verified_at":"2026-10-17T22:45:47Z","board_verified":true,"closed_at":null,"days_open":66,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":66},"description":"About NewtonX\nNewtonX is a B2B insights company trusted by the world's most innovative companies to make high-stakes decisions with confidence. We combine a verified network of business professionals with AI-powered research tools to deliver research intelligence faster, more precise, and more defensible than traditional methods.\nOur clients include Google, Microsoft, TikTok, DoorDash, Stripe, and Coinbase. Our research has been cited by Fortune, Forbes, TechCrunch, Adweek, and the Wall Street Journal.\nNewtonX has raised $47M from investors including Two Sigma Ventures, Third Prime, XFund, and Citi Ventures.\nThe Role\nAs part of NewtonX's growing Medellín engineering hub, you'll design and build the fast, reliable, modular user interfaces that power our research platform - sophisticated web applications, reusable component systems, and data-rich experiences built on top of our APIs. You'll work on a small, fast-growing engineering team (under 40 engineers) where individual contributors get in early and help shape the direction of our technology.\nThis role partners closely with US-based engineering leadership and cross-functional teams. Fluency and confidence in English, written and verbal, is essential - you'll participate in technical reviews, planning, and design discussions with colleagues across time zones.\nWhat You'll Own\nEngineering & Delivery\nDesign and develop modular, reusable, production-grade UI components and applications.\n\nBuild performant, responsive web interfaces that consume RESTful APIs and handle real-time, data-heavy views.\n\nContribute to solution design and participate actively in code review with other engineers.\n\nPerform debugging, resolve tech debt, and drive continuous code quality improvement.\n\nUphold engineering standards across code review, testing, documentation, and CI/CD hygiene.\n\nTechnical Contribution & Growth\nHelp evaluate and influence the adoption of new technologies, languages, tools, and frameworks.\n\nWeigh in on architectural decisions with an eye toward scalability and maintainability.\n\nPair program and mentor junior engineers as part of a growing local team.\n\nCross-Functional Collaboration\nWork closely with Product, Design, and US-based Engineering leadership on priorities and platform direction.\n\nCommunicate clearly and proactively across time zones, bridging any gaps between the Medellín and US teams.\n\nParticipate in Agile/Scrum ceremonies and translate business priorities into well-scoped engineering work.\n\nWhat We're Looking For\nRequired\n5 years minimum experience as a software engineer, with strong React experience across multiple projects (tech stack: React, TypeScript, modern frontend tooling).\n\nHands-on experience developing web applications that consume REST APIs.\n\nExperience with client-side state management and asynchronous data handling (e.g., React Query, Redux, or similar).\n\nStrong command of HTML, CSS, and responsive, cross-browser UI development.\n\nComfortable working with modern frontend build and deployment pipelines (e.g., Vite, Webpack, or similar, behind CI/CD).\n\nExcellent English proficiency - clear, confident communication in writing and in cross-functional meetings with US-based leadership.\n\nBachelor's degree or greater.\n\nNice to Have\nStrong SQL experience with a common relational database; experience tuning PostgreSQL performance.\n\nFamiliarity with cloud infrastructure and horizontally scalable systems (GCP, Kubernetes, Terraform, Cloudflare, or infrastructure-as-code).\n\nFull Stack Experience (Ideally in Python).\n\nWhy Join NewtonX\nFrontier B2B AI: Work on infrastructure powering the most sophisticated research and decision-making workflows in the world.\n\nHigh ownership from day one: Get in early on a growing regional team with real influence over technical decisions.\n\nExceptional traction: Strong product-market fit with the world's largest investment banks, hedge funds, and consulting firms.\n\nWorld-class team: Work alongside smart, driven people who are passionate about their craft.\n\nGrowth opportunity: Join during a hypergrowth phase, with a clear path to greater scope as the Colombia team scales.\n\nWhat We Offer\nFull Time contract according to Colombian legislation (not a contractor position).\n\nCompetitive compensation and equity aligned to the Medellín market.\n\nExcellent medical, dental, and vision insurance.\n\nGenerous paid time off, holidays, and parental leave.\n\nA diverse, collaborative, and positive culture where we invest in and celebrate each other's success.\n\nFlexible work environment where we work hard but have fun (happy hours, team projects, and global retreats).\n\nNewtonX is proud to be an equal opportunity workplace. 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