Lead Frontend Developer (React.js)

Join us as a Lead Frontend Engineer (React.js) and take ownership of shaping the frontend architecture and engineering direction of Zeely’s AI-driven product.

We’re looking for a strong technical leader who thrives in ownership, scale, and complexity — someone who can define architecture, drive key technical decisions, mentor a team of engineers, and ensure high standards of quality and delivery speed. This role is strategic for Zeely’s technical growth: you will influence not only how we build, but how fast and how well we ship.

Zeely AI is an all-in-one AI marketing platform that helps small businesses and marketing teams grow faster and achieve their goals through high-performing content and automation. Our platform enables users to create ad creatives, UGC videos, viral content, banners, and more, as well as launch effective paid and organic campaigns across Meta channels.

In simple terms, we’ve made world-class AI marketing tools and solutions accessible to businesses that previously could only get this level of support from large brands with expensive marketing teams.

A few things that define where we are today:

• 4 years on the market — a stable, profitable company backed by top international investors;
• 4x growth over the past year;
• 1,000,000+ businesses already use Zeely, and that number keeps growing every day;
• Top 3 in our category in the US market;
• 160+ specialists on the team;

• US-focused, with a global user base.

   

Your Key Responsibilities:

• Define and evolve the frontend architecture for a complex AI-driven product built on a modern React stack.
• Lead and grow a Frontend team (8-10+ engineers), set technical standards, and provide mentorship.
• Drive key technical decisions with full ownership — from architectural rationale to implementation and long-term impact.
• Ensure production-grade quality from the first iteration, balancing speed and engineering excellence.
• Optimize server state management, performance, and UX for high-load B2C environments.
• Oversee the full SDLC: from idea and design alignment to release and measurable product impact.
• Lead and structure the code review process, ensuring maintainability, scalability, and clean architecture.
• Maintain high code quality standards, including testing strategy and technical documentation.
• Work in a continuous delivery environment with frequent releases.

• Collaborate closely with Product and Design to ensure business impact, usability, and data-driven decision-making.

   

Your Key Responsibilities:

• Define and evolve the frontend architecture for a complex AI-driven product built on a modern React stack.
• Lead and grow a Frontend team (10+ engineers), set technical standards, and provide mentorship.
• Drive key technical decisions with full ownership — from architectural rationale to implementation and long-term impact.
• Ensure production-grade quality from the first iteration, balancing speed and engineering excellence.
• Optimize server state management, performance, and UX for high-load B2C environments.
• Oversee the full SDLC: from idea and design alignment to release and measurable product impact.
• Lead and structure the code review process, ensuring maintainability, scalability, and clean architecture.
• Maintain high code quality standards, including testing strategy and technical documentation.
• Work in a continuous delivery environment with frequent releases.
• Collaborate closely with Product and Design to ensure business impact, usability, and data-driven decision-making.
   

What You Need to Join Us:

• 3+ years in a Lead / Team Lead role, managing and mentoring 10+ engineers in a fast-paced product environment.
• 8+ years of hands-on Frontend experience, with strong production expertise in React and TypeScript.
• Proven experience shaping frontend architecture in high-load B2C products (100k+ users).
• Solid experience with modern frontend tools, including Redux Toolkit and/or RTK Query, Tailwind CSS, shadcn/ui, and React Hook Form.
• Strong understanding of performance optimization, scalable component architecture, server-state management, and UX under load.
• Experience working in Agile product teams with continuous delivery and frequent releases.
• Ability to balance speed, maintainability, and engineering quality.
• Strong ownership mindset, product thinking, and clear communication.
• English: Intermediate+; Ukrainian: fluent.
   

Would Be a Strong Advantage:

• Experience with payments and subscription flows (Stripe or similar providers).
• Experience with product analytics tools such as Mixpanel, Sentry, or similar.
• Experience building dashboards and data-heavy interfaces (charts, large tables, filtering, pagination, virtualization).
• Experience with real-time or near-real-time updates (SSE, polling, WebSockets).
• Experience working on AI-powered products, including integrations with AI services, async generation flows, and UX for AI-driven features.
   

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 → Tech Interview → Interview with COO / Co-Founder → 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! 💚