Senior Frontend Developer I Integrations Team

Company Description

Shiji is a global technology company dedicated to providing innovative solutions for the hospitality industry, ensuring seamless operations for hoteliers day and night.

Built on the Shiji Platform—the only truly global hotel technology platform—Shiji’s cloud-based portfolio includes Property Management System, Point-of-Sale, guest engagement, distribution, payments, and data intelligence solutions for over 91,000 hotels worldwide, including the largest chains.

The best hotels run on Shiji — day and night.

Job Description

We are looking for candidates based in the Silesia region (office in Katowice), with a requirement to be present in the office at least 4 times a month. Fully remote work is not an option, and unfortunately, applications from more distant locations will not be considered in the recruitment process.

You will join an experienced product team consisting of 5 Frontend Developers and 1 UX Designer, working in a scrum setup with 4-week sprints, followed by one week of stabilization, and a strong focus on code quality and collaboration. The product is based on a microfrontend architecture integrated with microservices across multiple regions (EU, US, and Asia). It’s a long-living, continuously evolving system, where stability and maintainability are key. 

The team follows established architectural and coding standards, adapting new code to them and gradually refactoring legacy areas where needed. Each developer acts as a guardian of a specific domain or module, ensuring its quality, consistency, and alignment with the overall architecture. 
Regular code reviews and technical syncs help maintain a high technical standard and knowledge sharing across the team. 

This role is ideal for someone who values clean architecture, system-level thinking, and long-term code quality in a complex, distributed environment. 

What you will do 

• Taking ownership of complex features — from design and architecture decisions through development, testing, and release. 
• Collaborating on solution design and system architecture in an environment based on microfrontends and microservices. 
• Conducting deep code reviews — ensuring not just correctness but maintainability, scalability, and alignment with architectural guidelines. 
• Designing and implementing domain-driven, layered, and scalable frontend solutions. 
• Working closely with Product and UX to transform business requirements into technical designs. 
• Writing unit and integration tests and maintaining high test coverage. 
• Contributing to and improving the team’s development infrastructure and technical standards. 
• Mentoring other developers, sharing knowledge, and setting examples of clean, maintainable, and tested code. 
• Actively participating in scrum ceremonies (sprints, grooming, planning, retrospectives) and influencing process improvements. 
• Monitoring and improving application performance, observability, and metrics. 

Qualifications

• At least 2 years of experience in a senior-level role, taking ownership of architectural decisions, mentoring, and delivering production-grade solutions. 
• Advanced understanding of TypeScript and modern JavaScript (ES6+). 
• Proven experience in frontend architecture design, applying DDD, CQRS, event-driven, and layered architecture principles. 
• Ability to clearly identify which application layer the code belongs to — presentation, domain, or infrastructure — and keep them separated. 
• Deep knowledge of the React ecosystem (hooks, context, reusable patterns). 
• Hands-on experience with JavaScript build systems (Webpack, Babel) and frontend tooling. 
• Strong command of design patterns, clean code, and SOLID principles. 
• Excellent Git and GitLab proficiency — including Git Flow, release management, semantic versioning (SemVer), and CI/CD pipelines. 
• Solid understanding of testing strategies — unit, integration, and component testing (Jest, Testing Library). 
• Awareness of scalability, performance optimization, and observability (metrics, logs, tracing). 
• Strong analytical and problem-solving mindset, capable of deep system-level reasoning. 
• Fluent English, both written and spoken.

Additional Information

We are looking for candidates based in the Silesia region (office in Katowice), with a requirement to be present in the off