Senior Frontend Engineer

About the role

Merciv is a startup focused on transforming how businesses approach strategic intelligence through AI and data analytics. We aim to provide robust, intuitive tools that enable organizations to make informed decisions using cutting-edge AI and human judgment.

Responsibilities

• Design and implement high-performance React components that make complex AI insights feel simple and actionable.
• Own critical parts of our frontend architecture as we scale from hundreds to thousands of daily active users across Fortune 500 enterprises.
• Collaborate closely with product managers, designers, and AI engineers to translate sophisticated analytical outputs into intuitive visualizations and workflows.
• Establish coding standards, conduct rigorous code reviews, and mentor team members on modern frontend best practices.
• Optimize performance to ensure sub-second load times and smooth interactions even when rendering complex data visualizations and real-time updates.
• Build innovative interfaces for users to interact with agentic AI systems, including natural language inputs, conversational flows, and transparent reasoning displays.
• Ensure quality and reliability by writing comprehensive tests, debugging across browsers and devices, and maintaining high code quality standards for enterprise customers.
• Contribute to product strategy discussions, bringing frontend expertise to inform what we build and how we build it.

Requirements

• 6-10+ years of professional frontend development experience.
• 4+ years building complex, production web applications with modern JavaScript frameworks.
• 2+ years with React in production environments.
• Experience working in fast-paced startup or high-growth product environments.
• Track record of owning significant frontend features end-to-end.

Technical Skills

• Frontend Fundamentals: Expert-level knowledge of HTML5, CSS3, and modern JavaScript (ES6+).
• TypeScript and type-safe development practices.
• Responsive design principles and cross-browser compatibility.
• Web performance optimization techniques (lazy loading, code splitting, caching).
• Advanced React proficiency including hooks, context, and component lifecycle.
• Experience with state management solutions (Redux, Zustand, or similar).
• Knowledge of React ecosystem tools (React Router, React Query, etc.).
• Understanding of React performance optimization and rendering patterns.
• Modern CSS approaches (CSS Modules, Styled Components, Tailwind, or similar).
• Proficient with build tools and bundlers (Vite, Webpack, or similar).
• Experience with version control (Git) and collaborative development workflows.
• Familiarity with CI/CD pipelines and automated testing frameworks.
• API Integration & Data Handling: Experience integrating RESTful APIs and GraphQL endpoints.
• Asynchronous JavaScript and promise-based workflows.
• Complex data transformations and state management.
• Experience with WebSocket or real-time data streaming.
• Testing & Quality: Proficiency with testing frameworks (Jest, React Testing Library, Cypress, or similar).
• Writing unit, integration, and end-to-end tests.
• Test-driven development practices.
• Strong debugging skills across browsers and devices.
• Data Visualization: Experience building interactive data visualizations (D3.js, Recharts, Chart.js, or similar).
• Translating complex datasets into clear, compelling visual stories.
• Understanding of visualization best practices and accessibility.

Professional Qualities

• Ownership Mentality: Track record of taking full ownership of features and seeing them through to successful production deployment.
• Product Thinking: Strong product sense with ability to balance technical constraints with user needs and business objectives.
• Clear Communicator: Excellent written and verbal communication skills; comfortable explaining technical concepts to non-technical stakeholders.
• Collaborative Spirit: Thrives in cross-functional environments, working closely with designers, product managers, and backend engineers.
• Detail-Oriented: Obsessive attention to detail in implementation, from pixel-perfect designs to edge case handling.
• User Advocate: Passionate about building experiences that users love; consistently thinks from the user’s perspective.
• Strategic Thinker: Ability to balance immediate feature delivery with long-term architectural decisions.
• Growth Mindset: Continuous learner who stays current with frontend technologies and best practices; eager to experiment with new tools.
• Pragmatic Problem Solver: Strong debugging and problem-solving skills; comfortable working through ambiguous requirements.
• Quality Champion: Committed to writing clean, maintainable, well-documented code that your teammates will thank you for.