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.

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.

What you’ll get from us

Basics

Form of employment of your choosing (B2B, CoE)
Flexible working hours
Lloyds insurance - in case of cooperation on a B2B basis
Subsidy for the purchase of glasses (300 PLN/year)
Free parking 3 minutes from the office or shared underground parking (can be reserved - first come, first served)

Health & Safety

Private medical care with dentists package for you and your family
Group life insurance for you and your partner
Multisport card as part of the Worksmile package

Working conditions & Development

Dell laptop, keyboard, mouse, wireless headphones and monitor
40h for development during work time
Free access to group language lessons
Udemy platform
In-house workshops, training sessions or meet-ups

Extras you may like

Worksmile cafeteria and 500 points per month to be used in vouchers
Referral bonus if new employee is referred
Chill room with table football & PlayStation
Free snacks (every day)
Team building events

Clause Regarding the Prohibition of Assistance Tools During Recruitment Interviews

In the interest of equal opportunity and transparency in the recruitment process, we would like to inform you that during job interviews (both remote and in-person), the following are not permitted: - the use of tools based on artificial intelligence (AI), including chatbots, response generators, translators, or content creation aids, - recording of interviews without prior and explicit consent from a company representative, - the use of applications that generate automatic notes or transcriptions of meetings (e.g., Notion AI, Otter.ai, Fireflies, etc.).

Get in touch with us today!

You can apply by sending your CV by Apply Now or to the Talent Partner Anna Moskal-Chabowska

Please don’t forget to put the clauses you accept in your resume:

I agree that my personal data will be processed by Shiji Poland Sp. z o. o. in order to recruit for the position I am applying for.

I agree to the processing of my personal data by Shiji Poland Sp. z o. o. for the needs of future recruitment.

We thank all applicants for their interest, however only those candidates selected for interviews will be contacted.

Senior Frontend Developer I Integrations Team

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