Senior Frontend Developer

Senior Frontend Infrastructure Engineer Location: New York City Work Style: Hybrid, 3 days per week in office Compensation: $210K–$380K base salary + equity Employment Type: Full-time Focus: Frontend Infrastructure, React, TypeScript, Performance, Reliability About Our Client Our client is building a company intelligence platform that helps investors, operators, and deal teams discover, analyze, and act on millions of startup and company signals in real time. Their product supports complex search, workflow automation, market discovery, and collaboration across large-scale company datasets. As usage grows, the frontend needs to move from “it works” to “it works flawlessly.” This is an opportunity to join a high-performing engineering team at an important inflection point and help build the frontend infrastructure that makes the product faster, more reliable, and easier for other engineers to build on. About the Role Our client is hiring a Senior Frontend Infrastructure Engineer to improve the reliability, performance, and scalability of their core frontend platform. This person will focus on the systems, patterns, and architecture that power a complex frontend used by hundreds of users running sophisticated searches across millions of companies, analyzing large datasets, building workflows, and collaborating on deal flow. This is a high-impact role for an engineer who loves React, TypeScript, frontend architecture, performance optimization, observability, and building the foundation that helps product teams ship faster without breaking critical user workflows. What You’ll Do Improve frontend reliability across core product workflowsBuild robust error boundaries, state management patterns, and data consistency systemsOptimize frontend performance for large datasets, complex filters, and data-heavy viewsImplement virtualization for tables and views with thousands of rowsImprove bundle size, render performance, page load speed, and overall user experienceBuild frontend monitoring and observability to catch issues before users doEstablish testing strategies that reduce regressions and improve engineering confidenceCreate reusable abstractions, patterns, and tooling that help engineers ship fasterDrive technical decisions across frontend architecture and infrastructureMentor engineers through complex migrations, performance work, and reliability improvementsPartner with product and engineering teams to make critical workflows faster, smoother, and more resilient What We’re Looking For 7+ years of experience building frontend applications at scaleDeep expertise in React, TypeScript, and modern frontend build toolingStrong track record improving production frontend performance at scaleExperience building reliable, data-heavy, user-facing applicationsStrong opinions on frontend architecture, supported by real production experienceExperience with state management, error handling, testing strategies, and frontend observabilityAbility to improve developer experience through better abstractions and engineering patternsStrong communication skills and the ability to mentor other engineersComfort working in a fast-moving, high-ownership engineering environmentNYC-based and able to work in office 3 days per week Bonus Experience Experience with discovery systems, search products, recommendation systems, CRM platforms, ATS platforms, or large-scale data indexing workflowsExperience building products that help users search, organize, document, and act on complex datasetsExposure to venture capital, private markets, company intelligence, market research, or investment workflowsExperience building frontend infrastructure for data visualization, analytics, or collaborative workflow products Why This Opportunity Own frontend infrastructure at a high-growth company intelligence platformImprove performance and reliability for users making critical investment and business decisionsWork on complex frontend problems involving large datasets, search, workflows, and collaborationHelp transform a fast-growing product from functional to best-in-classBuild systems and patterns that multiply the impact of the entire engineering teamStep into a senior role with meaningful technical ownership and influenceJoin a team solving hard problems across real-time data, company intelligence, and modern deal workflows