Fullstack Engineer

QuadSci is a New York-based AI startup that helps B2B SaaS companies predict customer churn, identify expansion opportunities, and optimize revenue operations. Its platform analyzes billions of product telemetry signals, CRM data, and customer interactions to generate predictive insights that enable GTM, Customer Success, Product, and Revenue teams to take proactive action.

🤓 As a Fullstack Engineer, the company expects you to perform the following tasks.

• Lead end-to-end agile software development: design, implementation, testing, deployment, and iteration.
• Architect and build fast, scalable, and reliable front-end applications, delivering intuitive and responsive user experiences.
• Design and implement modern search and discovery interfaces, including generative experiences (e.g., conversational UIs, autocomplete, semantic search).
• Develop and maintain integration flows and UI components across platforms (e.g., CRMs, support tools, chat, analytics).
• Build, consume, and optimize APIs that integrate with search, analytics, and backend services.
• Collaborate with backend and infrastructure teams to ensure seamless data flow and performance across the stack.
• Build reusable and accessible UI components with consistent behavior and styling.
• Implement observability, usability tracking, and security best practices across front-end and search-related systems.
• Produce clear technical documentation for UI architecture, interaction flows, and integrations.

✨ You are the person they are looking for if you have...

• 4+ years of professional experience developing modern web applications.
• Proficiency in JavaScript/TypeScript and at least one modern front-end framework (React, Vue.js, or Angular).
• Strong grasp of responsive design, component-based architecture, and CSS frameworks (e.g., Tailwind, SCSS, MUI).
• Experience building search interfaces, filtering tools, and user-facing dashboards or data visualizations.
• Solid understanding of RESTful API consumption and integration with front-end systems.
• Exposure to backend technologies (e.g., Node.js, Python, Java) and experience contributing to full-stack features.
• Experience working in agile, cross-functional teams with code reviews, testing, and CI/CD practices.
• Clear communication skills and ability to work closely with product managers, designers, and engineers.

💜 They will be more enthusiastic about you if you also have.…

• Experience building advanced search-driven experiences (e.g., autocomplete, faceted search, ranking, semantic enhancements).
• Familiarity with Elasticsearch or similar platforms and their impact on UI design (e.g., query latency, faceting, pagination).
• Exposure to conversational UIs or embedding-based search (e.g., retrieval-augmented generation).
• Experience designing integrations with third-party platforms (e.g., Salesforce, HubSpot, Zendesk, Slack).
• Strong understanding of accessibility (a11y) and performance optimization for large-scale front-end apps.
• Familiarity with frontend observability tools (e.g., Sentry, OpenTelemetry, LogRocket).
• Experience documenting frontend systems and UX flows for internal or external stakeholders.
• Familiarity with DevOps or cloud infrastructure tools (e.g., Docker, Kubernetes, GCP, AWS) for deployment support.