Senior Frontend Engineer

Join a fast-growing Series A startup, powering the next generation of AI applications with advanced, open-source vector similarity search technology. Our Qdrant Cloud product is a SaaS offering enabling others to deploy their clusters in various cloud providers, and to manage their deployments with ease via our programmatic API and web UI.

As we grow, we are looking for a Senior Frontend Engineer to take one of the leading roles in building scalable, high-performance frontend apps using React, while also working side-by-side with our backend development team in Python.

Tasks

As a Senior Frontend Engineer with a full-stack mindset, you will be responsible for defining, developing and shipping key features of our React-based frontend, whilst also working side-by-side with our Python backend development team. Collaborating in the inception, delivery and maintenance in a product cycle to deliver of a seamless user experience. The ideal candidate will be comfortable as a full-stack developer with strong focus on the front-end core tasks, delivering excellent DX tooling, CI/CD protocols, testable modules, building on containerisation, improving performance, etc.

Key Responsibilities:

• Frontend Development & Architecture: Design, develop, and maintain scalable, reusable frontend components using React and modern JavaScript (TanStack, OpenAPI, TypeScript, etc.). Define and implement best practices for frontend architecture, ensuring high-quality, clean, and performance-optimised code.

• Cross-functional Collaboration & Backend Support: Work closely with backend engineers to optimise APIs and ensure smooth frontend-backend integration. Assist in Python-based backend development when necessary to support frontend features.

• Mentorship & Leadership: Provide technical guidance and leadership, mentoring junior developers and establishing best practices across the team, ensuring adherence to clean, maintainable, and performance-sensitive code that scales effectively.

• Infrastructure Ownership & Code Quality: Take ownership of frontend infrastructure, including deployment, security, testing, lint checks, error reporting, and code quality analysis to ensure deliverability and performance.

• Collaboration with Growth Team: Occasionally work with the Growth team to deliver holistic approaches on product changes affecting churn and ROI, helping to measure, iterate, and improve based on product performance.

Requirements

• 5+ years of experience in frontend development with expertise in React, JavaScript/TypeScript, HTML5, and CSS3.

• Solid understanding of web browser technologies and standards: JavaScript, DOM, REST APIs, HTTP2, …

• Experience working with backend technologies, ideally Node.js/Python and single-page applications (or hybrid).

• Knowledge of front-end ecosystem tooling for linting, testing, bundling, tracking, delivering JS code and familiarity with CI/CD pipelines.

• Comfortable debugging frontend-backend interactions and optimising both product and runtime performance.

• Excellent communication skills and ability to work cross-functionally with product and engineering teams.

Nice to Have:

• Familiarity with Python frameworks like Flask or FastAPI.

• Familiarity with meta frameworks like Remix, Next.js, and/or libraries like TanStack Router and Query.

• Experience with modular, scalable frontend architectures.

• Knowledge of OAS, GraphQL and/or WebSockets.

• Prior experience working in a SaaS or startup-like environment.

Benefits

• Engage in Open-Source Development : Be part of a dynamic team working on an open-source project that shapes the future of AI.

• Fully Remote & Timezone-Friendly: Enjoy the flexibility of a full-remote position, accommodating diverse time zones for optimal work-life balance.

• Innovate in AI Technology : Contribute to building a critical component of the modern AI stack, influencing the direction of cutting-edge technology.