full-stack developer

Kernelics is an international company with development centers in Poland and Georgia that gathers IT specialists and builds teams for tech startups globally.

• Understand the existing Rails application and its production workflows;
• Modernize Rails incrementally into a clean API-first backend, avoiding big-bang rewrites;
• Build new React web features and APIs reusable by the React Native/Expo app;
• Remove or replace legacy code and upgrade outdated dependencies safely;
• Work with PostgreSQL, Sidekiq/Redis, Stripe, AWS, and Elastic Beanstalk;
• Add tests, review AI-generated code, and ship small, reliable releases.

• Have 5+ years of software engineering experience with strong Ruby on Rails and React skills;
• Bring production experience modernizing or upgrading a legacy Rails application;
• Demonstrate strong REST API, PostgreSQL, background jobs, authentication, and authorization knowledge;
• Possess experience with Stripe, AWS, automated testing, CI/CD, and production debugging;
• Work independently with a technical lead and communicate clearly in English;
• Fluent English for professional communication;
• Nice to have: React Native/Expo, Rails/Ruby upgrades and migration from ERB, jQuery, or Webpack to React, user-generated media, video, fundraising, or K-12 products, practical use of Claude Code, Cursor, Copilot, Codex, or similar tools.

• Fixed benefit health care coverage;
• Sports activities with 50% coverage up to the fixed amount;
• Corporate celebration of birthdays and significant life events;
• Support for professional and personal development;
• Flexible working hours and remote work from anywhere;
• Referral bonus for recommending friends to open vacancies;
• Regular online and offline corporate events and activities.