Senior Remote Full Stack Web Developer Jobs in Newark, NJ

100% Remote! You do not have to live in New York!

Must be US citizen or Green card holder!

As a Senior Web Full Stack Engineer you'll architect and build the interfaces and experiences that make agentic AI usable for marketing professionals — the surfaces where strategists, analysts, and client leads at the world's largest firms interact with AI agents, explore data, and ship campaign work.

This role is built for owners. Requirements at a fast-moving AI startup are rarely fully defined and often shift as we learn from customers. They are looking for someone who treats that as the fun part: someone who takes a partially-shaped problem and drives it to a well-shaped product, from the interface and interactions to the full stack behind them, without waiting for a full spec or a finished design. You'll have direct influence on product and technical direction, and your work will land in production at companies serving the world's biggest brands.

What you'll do

• Own complex web projects end-to-end, from ambiguous problem statement through design collaboration, architecture, build, deployment, and iteration in production
• Lead the design and architecture of full stack systems and user interfaces that power customer-facing AI agents (Node.js, Vue.js, TypeScript)
• Build sophisticated data visualization components and interactive dashboards for media and marketing analytics
• Multiply your output with agentic coding and help raise the bar for how the whole team builds with agents, from design-to-code to agent-assisted review
• Implement advanced interface patterns and complex state management for AI-native product experiences
• Drive improvements in web performance, user experience, and accessibility across devices and browsers
• Set engineering standards for code quality and testing in an agent-assisted codebase, and mentor teammates on both
• Work closely with backend engineers to design APIs and ensure smooth data flow, and with designers and customer teams as the product evolves
• Communicate project milestones and progress clearly to stakeholders as requirements shift

Who you are

• 5+ years of full stack web engineering experience with a track record of solving hard technical problems
• You've deeply integrated AI coding into your daily workflow; agents are your default way of building, not an occasional assist and you can speak concretely about how you direct them, where they fail, and how you verify their output
• You thrive on ownership: you've repeatedly taken loosely defined or shifting requirements and delivered great products anyway, filling gaps with judgment rather than waiting for direction
• Experience building and debugging large-scale full stack applications and user interfaces
• Strong experience with modern JavaScript frameworks (Vue.js, React, or similar) and advanced patterns
• Deep understanding of modern build tools, development workflows, and frontend architecture
• Strong understanding of HTML, CSS, responsive design principles, and web performance optimization
• Experience with complex state management, component architecture, and scalability challenges
• Strong background with RESTful APIs, frontend-backend integration, and data flow management
• Strong design sensibilities and the ability to implement sophisticated designs accurately
• Strong bias to execution coupled with high engineering standards and attention to detail

Bonus points

• Public artifacts of your agentic workflow: CLAUDE.md/AGENTS.md context files in your repos, published MCP servers, agent co-authored commit history, or writing about how you build with agents
• Hands-on experience building LLM-powered product experiences: chat interfaces, streaming responses, agent orchestration UIs, or evals for AI features
• Mastery of Vue.js and state management in reactive frameworks
• Experience with data visualization libraries such as D3, Chart.js, or Three.js
• Proficiency with collaborative design tools such as Figma and design systems
• Knowledge of testing frameworks, frontend testing best practices, and test automation
• Experience with accessibility standards and inclusive design practices
• Previous early-stage startup experience

 You'll work on a team that's genuinely all-in on agentic development, with the tools, budget, and encouragement to push what's possible with AI coding. What most companies call an experiment . You'll get better at this craft faster here than almost anywhere.

The company is a well-funded startup in a rapidly accelerating phase with major enterprise partners in production, expanding global deployments, and a market that's moving toward them. Joining now means real ownership of outcomes and real upside: substantial equity, outsized scope, and a direct line from your work to company results.

The company's team is small and accomplished, composed of people who've built and scaled products at top companies and chose to do the ambitious thing here. The culture is built around shared wins: high trust, low ego, and the expectation that everyone operates like an owner.

Additional information

• Location: Remote-first company with no central office location. This position is fully remote.
• Substantial equity grants
• Benefits: Health, dental, and vision insurance; 401(k) plan; generous PTO policy
• Authorization: Must be authorized to work in the US- The clompany will not sponsor any type of Visa candidates..