Senior JavaScript Developer (вакансія неактивна)

Product that needs your engagement 

You will be at the heart of building a new generation web-based application fully powered by AI technologies. This product is envisioned as a cutting-edge tool that redefines how professionals interact with complex data and workflows. We’re not just adding AI features into an existing app — we are designing an AI-first experience from the ground up, where automation, personalization, and intelligence are embedded in every interaction. The application will combine scalability, intuitive UX, and deep AI integration to create a solution that is both technically robust and delightful to use.

Your future team of professionals 

You will join a young but growing, ambitious team that thrives on collaboration and innovation.

Today the team includes:

• 1 Software Architect defining the overall technical direction and system design
• 2 skilled Backend Engineers + 1 Frontend Engineer who ensure strong architecture and data handling
• 1 Product Manager driving the vision, roadmap, and priorities
• 1 QA Engineer guaranteeing product quality and reliability

As we expand, this team will grow rapidly, and your role will be pivotal in setting both the technical and cultural tone of our engineering organization.

Your future challenges

AAs a Senior Front-end Developer, you will take on a founding role in building this application from scratch. Your challenges will include:

• Shaping the architecture and technical stack of a greenfield AI-driven web app
• Translating ambitious product ideas into production-ready features
• Partnering closely with backend engineers to define clear API contracts for AI services
• Solving novel technical problems, from real-time data visualization to seamless human-AI interactions
• Balancing speed of delivery with long-term scalability and performance
• Setting engineering standards and mentoring less experienced developers
• Acting as a thought partner to the Product Manager in exploring “what’s possible” with modern AI technologies.

This is a rare chance to work on a zero-to-one product, where your decisions will directly shape the outcome.

Impact you will make 

• Develop responsive, scalable UI components using HTML, CSS, JavaScript/TypeScript, and React.js
• Ensure cross-browser compatibility and accessibility compliance (WCAG standards)
• Work closely with backend developers to integrate APIs
• Partner with UX/UI designers to translate designs into seamless user experiences
• Participate in code reviews and contribute to continuous improvement of team practices
• Identify and resolve performance bottlenecks in React apps

Tech stack you’ll be working with

• UI/Styling — Tailwind
• State Management — Zustand + TanStack Query
• Forms — React Hook Form + Zod
• Routing — TanStack Router
• Monorepo orchestration — Turborepo

Skills we are looking for 

• At least 5 years of experience as a Front-end Developer, preferably in a tech environment
• Higher education in Computer Science, Information Technology, or a related field (relevant certifications are a plus)
• Strong proficiency in JavaScript and TypeScript
• Deep understanding of software principles: SOLID, IoC, OOP, design patterns, and client/server architecture
• Expertise in React.js and state management
• Version control with Git and collaborative workflows (branching, pull requests, reviews)
• Familiarity with authentication concepts and secure application development
• Experience with testing frameworks
• Knowledge of Docker/docker-compose and basic CI/CD processes
• Performance optimization skills: profiling JS/React apps, identifying bottlenecks, keeping apps fast

Benefits you get

• Maintain your work-life balance

Manage your own working hours with our flexible schedule

19 days of annual vacation granted on a pro-rata basis

No overtimes required

• Hybrid/remote type of cooperation

Whether you prefer to work remotely in the comfort of your home office or from one of our 4 offices, you can still take part in increasing the world`s awareness about quality Ukrainian products from any part of the world

• Stay healthy

Medical insurance from one of the top insurance companies in Ukraine with a wide range of included services, as well as special programs for relatives; and special options for those who live abroad.

15 working days of sick leave per year — because your health is a priority.

• Grow with us

In-house English courses — increase your proficiency through our online courses and speaking clubs with a native speaker

Online learning activities — workshops, lectures, and webinars to enhance your leadership, management, and self-awareness skills

Experience exchange — we are proud of our team of professionals who gladly share their deep expertise in all kinds of fields with the rest of the team

Promotions, rotations, and transitions — when you believe your skills could benefit a different role or team.

• Stand with Ukraine!

We have an active pro-Ukrainian position, and that means we help our army, our servicemen, and their families not only through constant donations and volunteering, but also through our military leave policy, special health insurance options, and financial help

We are a perfect match if you share our values

We are professionals in our field.

We know how to turn up our professionalism to the maximum, because we are experts who enjoy solving complex tasks.

We know how to focus on the product, think big, and at the same time delve deep into the details.

We create a calm and friendly atmosphere within the company.

We value the freedom of open and transparent communications.

Radical honesty is embedded in the foundation of our culture.

We are open to new things and constantly develop and practice regular knowledge sharing, which helps us evolve continuously.

Most importantly, the company creates an environment where we can fulfill our potential upon a solid foundation.

Our Hiring Process

• Recruitment Interview
• Technical Interview
• Offer Call