Middle Full Stack Engineer (React and Kotlin)

— Remote (Eastern Europe preferred: Ukraine, Romania)

— Full-time

Project

Our client is a mature AI startup with a stable product that has been in production for years. The developer will join a small full-stack team contributing to both frontend and backend development. 

The project involves working closely with product managers and a local team leader. Communication, proactive problem-solving, and deep understanding of the codebase and business domain are essential.

The main focus will be on front-end tasks, but occasional back-end work is expected, so fullstack experience is highly valued.

Responsibilities:

• Full-stack development within a product team;
• Building new features and maintaining existing products;
• Collaborating with product managers and team members on web applications;
• Implementing backend endpoints and modifying SQL schemas as needed;
• Optimizing code for performance, maintainability, and scalability;
• Following clean code practices and SOLID principles;
• Proactively clarifying requirements and resolving blockers independently;

Requirements:

• 4+ years of software development experience;
• Strong front-end skills in React + TypeScript;
• Backend experience in Kotlin, REST services, clean architecture;
• SQL experience: schema design and query writing;
• Excellent communication and leadership skills;
• Motivated, proactive, and independent;
• Experience in fast-paced startup environments;
• English: B2+ (very fluent, proactive communication);

Would be a Plus

• Previous startup experience;
• Knowledge of Agile methodologies and leadership potential;
• Familiarity with best-practice development bootcamps;

What We Offer

• Remote-first work environment;
• Long-term engagement with a stable, growing startup;
• Mature product with a constant pipeline of complex features;
• Free-of-charge short best-practices bootcamp before assignment;
• Agile teamwork experience and leadership growth;
• Flexible work schedule;
• Career development and personal development plan;
• Paid sick leaves and vacations;
• Refund of personal professional growth (courses, platforms, etc);
• Personal development plan;
• Internal accountant;
• Ability to select currency for your contract.