Frontend Developer

Cernel is building the next generation of e-commerce infrastructure with AI-powered agents that automate complex tasks and connect workflows across systems. We’re developing an advanced agent framework that analyzes data, makes decisions, and drives performance — giving e-commerce teams better results, higher conversions, and more time for creative work.

Who you are?

You’re an experienced frontend developer who writes clean, maintainable code and cares deeply about architecture, performance, and best practices. You know how to build scalable, production-grade applications that handle complex data flows — and you enjoy solving hard problems with simple, elegant solutions.

You thrive in a startup environment where ownership matters. You value honesty, data-driven decisions, and open communication. You take responsibility, move fast, and enjoy shaping products from the ground up.

You have hands-on experience making architectural choices, iterating quickly, and balancing short-term impact with long-term scalability. In this role, you’ll help define the frontend foundation that enables Cernel’s AI agents to scale globally.

You’ll work closely with our Head of Frontend & UX and take shared responsibility for developing new features, setting coding standards, and building reliable, high-performing systems.

What we're looking for

Required Experience:

• 3+ years of production experience with TypeScript in strict mode

• Expert-level knowledge of React and Next.js (or similar frameworks)

• Proven experience building and maintaining design systems or component libraries

• Track record of shipping frontend code that handle large-scale data (10k+ records) with optimal performance

Technical Excellence:

• Deep understanding of React patterns, hooks, and performance optimization techniques

• Experience with real-time data synchronization and complex filtering/sorting UIs

• Comfort working with REST and GraphQL APIs

• Strong grasp of web accessibility standards (WCAG 2.1)

• Experience with CI/CD pipelines and modern development workflows

Responsibilities and what you will do

We design and develop a platform in-house that provides our customers with advanced AI capabilities on top of their existing data, allowing them to operationalize tasks and gain transparent insights into how their data is stored, enriched and analyzed. We facilitate data management and actionable insights at scale across all their systems.

You'll Solve Complex Problems Like:

• Building performant, filterable data tables handling 100k+ product records with real-time updates

• Creating intuitive interfaces for complex AI agent configurations that non-technical users can understand

• Implementing real-time data synchronization across multiple data sources (PIM, ERP, CRM systems)

• Designing responsive, accessible dashboards that visualize AI decision-making processes

• Optimizing bundle sizes and render performance for data-intensive applications

• Building a component library that balances flexibility with consistency

Day-to-Day Responsibilities:

• Transform Figma designs and UX wireframes into production-ready, accessible code

• Build and maintain our reusable component library and design system

• Write comprehensive tests: unit, integration, and E2E

• Integrate with backend APIs and handle complex data transformations

• Drive frontend architecture decisions and establish coding standards

Who are we?

Cernel is an e-commerce automation startup founded in 2023. We are a team of 12 people, actively hiring and expanding the team to support our growth. Cernel is building the next foundational layer for modern ecommerce systems. Today, businesses run on complex stacks of ERP, CRM, PIM, and WMS systems that rarely play well together.

We have already demonstrated traction with 30+ paying customers, and we're growing rapidly. Our first product – PIM ON AUTOPILOT – automates product data enrichment, filter construction, and categorization in existing PIM systems. But this is just the beginning: Our long-term goal is to evolve this into a fully agentic PIM system and eventually into an integration layer beneath all commerce software.

We are VC-funded, backed by private funds and founders/employees from team.blue, Humio and Google as well as a list of experienced e-commerce specialists. You will therefore work in a highly technical and skilled environment with an automation-first approach to solving complex problems.

What we offer

We offer several benefits, including but not limited to:

• Competitive pay and equity

• Central office in Aarhus with lunch

• Upskilling opportunities such as certifications, events and programmes

• A workplace where you have an opportunity to help define the future

Next steps and how to apply

Submit your application through TheHub or reach out to our hiring manager, Mathias. We will continuously accept applications and invite candidates for an initial interview.

For more information or questions please contact us at mfe@cernel.ai or phone number +45 42 28 24 16