Senior Frontend Developer

Join us as a Senior Front-End Engineer (React.js) and take ownership of building and evolving critical parts of Zeely’s AI-driven product.
We’re looking for an experienced engineer who thrives in ownership, ambiguity, and scale — someone who can design robust front-end solutions, drive technical decisions, and deliver production-ready, high-quality UI with real product impact. In this role, you’ll work closely with product, design, and engineering teams and directly influence core product decisions.

Zeely AI is a platform that uses artificial intelligence to generate viral UGC videos and ad banners, as well as launch effective ad campaigns on Facebook and Instagram, helping small businesses become visible and scale.

We already have 1 million users in the US and are consistently growing more than 4x year-over-year. Today, Zeely is ranked among the Top-3 products in its category on the US market, and our team has grown to over 130 specialists.

We are part of the Google for Startups Alumni community and official partners of Meta and TikTok. In 2024, Zeely was recognized by Forbes Ukraine as one of the Top 25 fastest-growing startups.

Your Key Responsibilities:

• Owning and evolving core front-end areas of a complex AI-driven product used at scale — from architecture decisions to day-to-day implementation.

• Designing and implementing robust front-end solutions for complex user flows: multi-step forms, async AI generation states, real-time updates, and edge-case-heavy scenarios.

• Delivering production-ready, pixel-perfect UI that strictly follows design systems and maintains high quality under rapid product iteration.

• Optimizing performance and reliability of front-end applications under high user traffic: reducing re-renders, improving load times, and ensuring smooth UX in data-heavy interfaces.

• Driving technical decisions on the front end — proposing improvements, identifying risks, and shaping long-term maintainable solutions instead of short-term patches.

• Collaborating closely with Product, Design, and Backend to turn ambiguous requirements into clear, user-centered, technically sound solutions.

• Maintaining high engineering standards through thoughtful code reviews, testing strategies, and ownership of the quality of delivered features.

What You Need to Join Us:

• Strong, hands-on experience with React.js in production (5+ years) — not just building features, but owning and evolving front-end solutions in real products.

• Solid TypeScript experience (3+ years) with a clear understanding of type safety, data contracts, and maintainable codebases.

• Production experience with a modern front-end stack, including:

  • Redux Toolkit and/or RTK Query for complex state and server-state management;

  • Tailwind CSS and shadcn/ui for building scalable, consistent UI systems;

  • React Hook Form for complex, performance-sensitive forms;

  • Vite as a primary build tool.

• Strong understanding of modern front-end development practices, including component architecture, performance considerations, and maintainability.

• Experience working in product teams using Agile processes, with the ability to operate in environments with evolving requirements and partial ambiguity.

• Strong skills in building adaptive, responsive, and accessible layouts, with a pixel-perfect mindset and close attention to UI details as a core part of engineering quality.

• Language proficiency: English at Intermediate level or higher and fluent Ukrainian for day-to-day communication with the team.

Would Be a Strong Advantage:

• Experience integrating payments and analytics (Stripe, Solidgate, Mixpanel).

• Hands-on work with data visualization libraries (Echarts, Highcharts).

• Expertise with Next.js and modern rendering strategies.

• Experience with real-time or near-real-time updates (SSE or similar approaches).

• Experience working with TanStack Table or similar advanced table solutions.

Why It’s Exciting to Work With Us:

• Build AI-powered tools with real impact, helping over one million small businesses grow, compete, and launch ads without agencies or complex marketing setups.

• Join a strong A-level team of experienced professionals who set a high bar and push each other to do better work.

• Remote-first approach: work from anywhere, with access to our offices in Warsaw and Kyiv.

• We take care of the essentials. Paid time off, sick leaves, and financial support with private entrepreneurship matters.

• Regular performance reviews to ensure your growth is transparent and rewarded.

Recruitment Process:

Recruiter interview → Test assignment → Interview with COO / Co-Founder & Frontend Lead → Reference check → Job offer.

You’ll influence core product decisions, and help build a fast-growing, financially stable AI platform — not as a contributor on the sidelines, but as an owner of critical parts of the product.

Send us your CV — we’d love to get to know you better! 💚