Senior Frontend Engineer (NYC)

Senior Frontend Engineer (NYC) Build high-performance React and TypeScript tools for real-time logistics, own frontend architecture end to end, and help shape systems that coordinate critical operations in NYC. Location: New York, NY Work Arrangement: On-site, 5 days per week Employment Type: Full-time Compensation: $176,000–$242,000 base + competitive equity + bonus Visa: Open to visa transfers, including OPT and H-1B transfers About the Company A well-funded technology company is building advanced automation and software systems for critical real-world industries. Its products operate in live environments where software directly coordinates physical operations, including logistics, food delivery infrastructure, transportation, and autonomous systems. The organization has substantial financial backing and a strong engineering culture. Engineers are given significant ownership over technical decisions and are expected to solve complex problems across software, operations, and physical systems. About the Role We are looking for a Senior Frontend Engineer to build and scale real-time applications that power live logistics and operational workflows. You'll work primarily with React and TypeScript , building high-performance interfaces that consume continuously changing data through WebSockets, Server-Sent Events, and GraphQL subscriptions. This is a hands-on role with ownership from architecture through production. You'll collaborate closely with backend engineers and operational teams while helping establish frontend engineering standards as the platform scales. What You'll Do Design and build high-performance React applications for real-time operational workflows Build interfaces powered by WebSockets, SSE, and GraphQL subscriptions Own complex frontend projects from technical design through production rollout Improve frontend performance, reliability, latency, and scalability Build data-rich interfaces for live logistics and operational environments Contribute to mobile applications built with React Native Collaborate closely with backend engineers and operations teams Make architectural decisions around state management, data synchronization, and frontend infrastructure Mentor other engineers and contribute to frontend engineering standards Help scale the frontend platform as the company's operations expand What We're Looking For 3+ years of professional software engineering experience Strong production experience with React and TypeScript Experience building complex, high-performance frontend applications Experience working with real-time systems , such as: WebSockets Server-Sent Events GraphQL subscriptions Live state synchronization Strong understanding of frontend architecture and performance optimization Ability to lead technical design from an initial problem through production Understanding of backend systems and APIs Strong ownership and ability to work independently Willingness to work on-site in New York City five days per week Preferred Qualifications React Native or other mobile development experience Experience with logistics, transportation, delivery, marketplaces, or operational software Experience building mapping, dispatch, fleet, inventory, or real-time tracking interfaces Experience working on high-throughput consumer or operational platforms Strong system-design experience Experience mentoring engineers or leading technical projects Strong Backgrounds Include Candidates from companies working on: Food delivery and logistics Marketplaces Fleet and transportation Real-time operations Supply chain Mapping and location-based products High-scale consumer applications Experience at companies such as delivery marketplaces, logistics platforms, transportation technology companies, or other high-growth technology organizations is particularly relevant. What We're Not Looking For Frontend engineers who have only worked on static CRUD applications Candidates without meaningful real-time application experience Engineers without production React/TypeScript experience Candidates focused exclusively on design systems or internal tooling Candidates unwilling to work on-site in New York City Interview Process Recruiter screen Frontend technical interview System design / architecture interview Team interview Final leadership interview The technical process focuses heavily on React, TypeScript, frontend architecture, real-time systems, performance, and ownership. Why Join Build software that directly powers real-world operations Work on high-scale, real-time systems with tangible operational impact Join an engineering-first environment where engineers have significant decision-making authority Work across web, mobile, backend integrations, and real-time infrastructure Take ownership of complex technical problems during a major scaling phase Competitive compensation, equity, and bonus Locations United States Employment type Full-time Job location New York Workplace & Culture at Sperton At Sperton, we believe that great results come from great people. Our culture is built on trust, collaboration, and a shared passion for delivering quality in everything we do. We are a Norwegian-owned international company with colleagues across Europe, Asia, and the USA , working together seamlessly across time zones and cultures. Our teams are diverse, yet united by the same goal — to connect people and companies in meaningful ways. We value openness, initiative, and continuous learning. Everyone at Sperton is encouraged to take ownership, share ideas, and challenge existing ways of working to make our solutions even better. Even though we operate globally, our approach is personal. We take pride in creating a supportive and inclusive environment where people feel heard, respected, and motivated to grow — both professionally and personally.