Senior Frontend Engineer - TENTENS Tech

Senior Frontend Engineer

Tentens Tech is a partnership IT company of Skelar, a Ukrainian venture builder that creates international tech businesses. We develop social discovery platforms for more than 20 million users worldwide. Our pace and scale are driven by deep expertise in analytics, highload, and performance marketing. The team at Tentens Tech today consists of 250+ people, each acting as a CEO in their role and influencing the shared result. We work in a 10/10 style: we stay focused on the goal, ask the right questions along the way, and never settle for "good" — only maximum and a little further. If you see yourself in this description and are ready to pick up speed with us, let's get acquainted!

We are currently looking for a Senior Frontend Engineer to help us raise the bar of achievement. The challenges that await in this role include:

• Technical leadership: designing solutions, participating in architectural discussions, mentoring junior developers, raising the quality bar through code review and technical initiatives.
• Delivery and team interaction: responsibility for end-to-end task implementation within sprints, close collaboration with design, analytics, and backend teams.
• Engineering quality: writing scalable, maintainable code, working on performance-critical scenarios on a highload platform.
• AI-driven development: actively using AI tools in daily work — from writing and reviewing code to exploring solutions. We expect the Senior Developer to not only be familiar with these tools but also to continuously expand their use within the team.

Must-have:

• 4+ years of experience in frontend development;
• Deep experience with Vue or React;
• Confident TypeScript;
• Experience with A/B testing and feature flags;
• Experience in writing tests (unit, component).

Nice-to-have:

• Experience with payment flows or PSP integrations (Adyen, PayPal, etc.);
• Experience with gRPC / ConnectRPC;
• Understanding of iframe and PostMessage communication;
• Experience with i18n / localization (i18next or similar);
• Experience with Vite;
• Understanding of web performance and rendering optimization.

What you will get together with us:

• Internal clubs for professional areas: marketing, development, finance, recruiting;
• Trainings, courses, attending conferences;
• Spacious and modern offices in Kyiv and Warsaw;
• Medical insurance, corporate doctor.

Let's build the next big everything together!