Senior Frontend Engineer

ABOUT MERCIV

Merciv is an AI and data analytics startup dedicated to reshaping how businesses approach strategic intelligence. Our mission is to transform how organizations harness data, generate insights, and drive strategic decisions through cutting-edge AI pipelines and dynamic forecasting mechanisms.

We're building toward a world where every business decision is informed by the right data at the right time, combining AI capability with human judgement. Our technology:

• Connects disparate data sources into a single, coherent intelligence layer

• Augments human decision-making with autonomous AI analysis

• Surfaces insights and opportunities that traditional tools miss

• Forecasts outcomes and helps teams navigate uncertainty with real clarity

• Gives organizations the ability to shape their markets, not just react to them

We're building solutions that are robust and scalable but also genuinely intuitive, so that teams across an organization can actually use them, not just the data team. We've raised $14M in seed funding, built our team around a strong engineering culture, and are launching publicly after nearly two years in stealth mode.

About the Team

We're building an agentic AI platform that's changing how enterprises work with data. Merciv connects an organization's entire data landscape with external sources - social media trends, industry reports, consumer behavior signals - to surface insights and automate workflows that used to take analysts weeks.

We care a lot about making powerful tools feel simple. Every feature should be intuitive, every component interactive. We want users to open Merciv and immediately feel like they can do more than they could before.

Our lean, agile team thrives on innovation and autonomy. We're small enough that everyone has real ownership. We use a DRI (Directly Responsible Individual) model - you'll own major product features from conception to launch, not just contribute to them. You'll wear multiple hats, and that's by design.

Our work environment thrives on creativity and cutting-edge technology, built for those eager to shape the future of human-AI collaboration. If you’re excited about being a part of a fast-paced, innovative startup culture and making a significant impact on client business, Merciv is the place for you. Join us as we expand the horizons of retail intelligence and deliver unparalleled value to our clients.

THE ROLE

Merciv is transforming how brands understand consumers through autonomous AI that doesn’t just analyze data — it proactively surfaces insights that drive million-dollar decisions. Our platform powers some of the largest retail and consumer goods organizations in the world, synthesizing signals from thousands of sources to reveal patterns and opportunities before competitors see them coming.

As we scale our enterprise platform and launch our self-serve tier, we need a Senior Frontend Engineer who can craft exceptional user experiences that make complex AI-powered insights feel intuitive and actionable. This is your chance to build the interface that puts autonomous consumer intelligence into the hands of brand leaders, researchers, and marketers.

You’ll own critical parts of our frontend architecture, building the UI that enables users to explore millions of data points, understand nuanced consumer sentiment, and make confident decisions backed by AI reasoning. Working closely with our product, design, and AI teams, you’ll create elegant experiences that transform dense analytical outputs into clear, compelling narratives.

This is a hands-on role where you’ll build the interactive components that enterprise brands rely on daily to stay ahead of market shifts. In this role, you’ll be the architect of experiences that must be enterprise-grade (fast, accessible, secure) while maintaining startup agility. Your work directly impacts whether a brand leader can understand a critical consumer trend in seconds or gets lost in data — a difference measured in millions of dollars of opportunity.

WHAT YOU’LL DO

Build Exceptional User Experiences: Design and implement elegant, high-performance React components that make complex AI insights feel simple and actionable

Architect for Scale: Own critical parts of our frontend architecture as we grow from hundreds to thousands of daily active users across Fortune 500 enterprises

Collaborate Cross-Functionally: Partner with product managers, designers, and AI engineers to translate sophisticated analytical outputs into intuitive visualizations and workflows

Drive Frontend Excellence: Establish coding standards, conduct rigorous code reviews, and mentor team members on modern frontend best practices

Optimize Performance: Ensure sub-second load times and smooth interactions even when rendering complex data visualizations and real-time updates

Champion User-Centric Design: Work closely with UX/UI designers to implement pixel-perfect designs while advocating for usability and accessibility

Own Feature Development: Take features from concept to production, including requirements gathering, technical design, implementation, testing, and deployment

Enable AI Interaction: Build innovative interfaces for users to interact with agentic AI systems, including natural language inputs, conversational flows, and transparent reasoning displays

Ensure Quality & Reliability: Write comprehensive tests, debug across browsers and devices, and maintain high code quality standards for enterprise customers

Shape Product Direction: Contribute to product strategy discussions, bringing frontend expertise to inform what we build and how we build it

CORE REQUIREMENTS

Experience

• 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+)

• Deep understanding of TypeScript and type-safe development practices

• Strong command of responsive design principles and cross-browser compatibility

• Expertise in web performance optimization techniques (lazy loading, code splitting, caching)

React Ecosystem

• 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 Development Practices

• Strong expertise in 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

• Understanding of asynchronous JavaScript and promise-based workflows

• Ability to handle 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)

• Experience writing unit, integration, and end-to-end tests

• Understanding of 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)

• Ability to translate 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 featur