Senior Frontend Developer

Location: Tel Aviv, Israel (Hybrid) Type: Full-time Team Size: 13 people

We're building the infrastructure layer for MCP (Model Context Protocol) - the open standard for connecting AI assistants to external tools and data sources.

We're a 13-person startup, Just starting our newest product journey, with an ambitious roadmap of features waiting to be built. If you thrive in early-stage environments where you can shape the product and leave your mark, this role is for you.

We're looking for a Senior Frontend Engineer to take ownership of our frontend applications. You'll be joining a backend-heavy team (80% backend, 20% frontend) as the go-to person for all things UI.

This is an 80% frontend / 20% backend role. You'll primarily build user interfaces but will also work across the stack when needed - defining APIs, working with our PostgreSQL database, and collaborating closely with backend engineers.

You'll work directly with our founders and designer to translate designs into polished, production-ready interfaces. We need someone who can take rough designs and fine-tune them into something implementable, bringing their own UI/UX sensibilities to the table.

• mcpx-ui - The user-facing dashboard for the open source MCP gateway (React + Vite)
• mcpx-admin-ui - The enterprise admin console for managing MCP infrastructure (Next.js)
• Building new features from scratch on a rapidly evolving product
• Collaborating with backend engineers on API contracts and data models
• Working with designers to refine and implement UI/UX specifications
• Maintaining and extending our component library built on shadcn/ui and Radix
  

Frontend:

• React 18, TypeScript (strict mode)
• Vite & Next.js 16
• Tailwind CSS with custom design tokens
• shadcn/ui + Radix UI component library
• TanStack Query (React Query) for data fetching
• React Hook Form + Zod for forms and validation
• Socket.io for real-time features
• Recharts & XYFlow for visualizations

Backend (20% of your time):

• Node.js + TypeScript
• PostgreSQL
• RESTful API design
  

Must Have:

• 5+ years of professional frontend development experience
• Strong proficiency in React and TypeScript
• Experience with modern CSS (Tailwind CSS preferred)
• Familiarity with component libraries (Radix UI, shadcn/ui, or similar)
• Experience with state management solutions (Zustand, Redux, or similar)
• Comfortable working with REST APIs and defining API contracts
• Basic experience with databases (SQL, PostgreSQL)
• Ability to work independently and take ownership of frontend architecture decisions
• Strong collaboration skills - you'll be the frontend voice in a backend-heavy team
• Fluent communication in English

Nice to Have:

• Experience with Next.js and SSR/SSG patterns
• Design systems knowledge - building and maintaining component libraries
• Experience with real-time applications (WebSockets, Socket.io)
• Familiarity with monorepo setups (npm workspaces)
• Experience with E2E testing
• Knowledge of MCP (Model Context Protocol) or AI/LLM tooling ecosystem
• Experience at early-stage startups
  

• Ownership mindset - You don't wait to be told what to do. You see problems and solve them.
• Startup DNA - You're comfortable with ambiguity, changing priorities, and building things that might get thrown away.
• Move fast - You bias toward action. Ship it, learn from it, iterate.
• Pragmatic - You know when to build it right and when to build it fast.
• Collaborative - You can work effectively with backend engineers, designers, and product leadership.
• UI sensibility - You care about the details. You can take a design and make it better.
  

• Opportunity to shape the frontend of a product from its earliest days
• Direct collaboration with the CTO and founding team
• High ownership and impact in a small, fast-moving team
• Hybrid work from our Tel Aviv office
• Competitive startup compensation