Johnson Controls

 Required Experience/Qualifications 

• 3+ years of production experience with Go 

• Deep understanding of REST API design, batch processing, and websocket-based real-time data 

• Strong experience with MariaDB/MySQL, including query optimization and data modeling 

• Familiarity with GORM ORM 

• Experience with RabbitMQ as an event broker • Ability to read and understand PHP code (used for legacy migration) 

Nice to have: 

• Performance tuning for high-load systems (10K+ RPS) 

• Experience integrating or using Centrifugo (subscriptions, pub-sub messaging) 

• Familiarity with profiling tools and scalable Go architectures • Experience with PHP-to-Go migrations is a big plus 

Responsibilities 

• Develop and maintain core backend services (REST APIs, batch jobs, WebSocket services) 

• Ensure the system scales and performs reliably under high load 

• Optimize database interactions and handle complex relational data models 

• Assist in refactoring and migrating business logic from PHP 

• Collaborate with DevOps and frontend teams to deliver robust functionality 

Company Offers 

• Fully remote work setup 

• Competitive compensation 

• 8-hour working day 

• 20 days paid vacation + 8 days paid sick leave 

• Medical insurance 

• Friendly, professional team and long-term project 

Johnson Controls is a global leader in smart, sustainable building solutions, security, and fire protection. With over 140 years of innovation, we develop cutting-edge technologies that enhance efficiency, safety, and comfort in buildings worldwide. Our mission is to create a smarter, healthier, and more sustainable future through intelligent automation and advanced energy solutions.

About Johnson Controls

Johnson Controls is a global leader in smart, sustainable building solutions, security, and fire protection. With over 140 years of innovation, we develop cutting-edge technologies that enhance efficiency, safety, and comfort in buildings worldwide. Our mission is to create a smarter, healthier, and more sustainable future through intelligent automation and advanced energy solutions.

Required Experience/Qualifications 

• 3+ years of experience with JavaScript frontend development 

• Strong knowledge of React and Redux • Hands-on experience with Material UI (MUI v5) and Material Design 3 

• Experience with RESTful APIs and WebSocket-based interactions 

• Familiarity with external charting libraries (e.g., Chart.js, Recharts, etc.) • Good understanding of UI/UX principles and component-based architecture 

• Willingness to work with legacy code during a migration period 

Nice to have: 

• Initiative in introducing testing best practices (e.g., unit/integration tests) 

• Experience with performance tuning and accessibility 

• Familiarity with UI/UX best practices 

• Willingness to learn backend technologies (Go, Gin, Centrifuge) Responsibilities 

• Participate in the migration from Material Design 2 to Material Design 3 • Refactor and improve existing UI components and architecture 

• Implement new UI features and optimize existing ones 

• Collaborate with backend developers to integrate APIs and real-time data 

• Gradually phase out legacy UI while building the new frontend from the ground up 

• Participate in design discussions and propose improvements 

Company Offers 

• Fully remote work setup 

• Competitive compensation 

• 8-hour working day 

• 20 days paid vacation + 8 days paid sick leave 

• Medical insurance 

• Friendly, professional team and long-term project 

About the Project: Johnson Controls is an international developer and manufacturer of high quality electronic security systems and components, operating in Ukraine via its subcontractor in Kyiv. You will join during a critical UI modernization phase, contributing directly to the new user experience aligned with modern design standards.

Required skills experience

JavaScript

About Johnson Controls

Johnson Controls is a global leader in smart, sustainable building solutions, security, and fire protection. With over 140 years of innovation, we develop cutting-edge technologies that enhance efficiency, safety, and comfort in buildings worldwide. Our mission is to create a smarter, healthier, and more sustainable future through intelligent automation and advanced energy solutions.