Senior Software Engineer (React)

Quick Facts

Role: Senior Software Engineer (React) – Web Platform team

Focus: Shared frontend platform used by multiple engineering teams, spanning frontend applications, cloud services, developer tooling, and production operations

Description

You will help build, maintain, and improve a shared frontend platform used by multiple engineering teams. The work spans the full software lifecycle, including designing and implementing frontend solutions and supporting software in production by troubleshooting issues across frontend, API, and cloud environments. This role is ideal if you enjoy complex technical problem-solving and production support.

Responsibilities

• Design, build, and maintain scalable, reliable, and efficient frontend solutions.
• Contribute to technical design and implementation decisions aligned with engineering standards and architectural principles.
• Develop and improve shared platform capabilities, tooling, and developer experience.
• Collaborate with engineers, product partners, and designers to deliver high-quality software.
• Support, troubleshoot, and optimize applications in production; investigate issues across frontend, API, and cloud environments.
• Use monitoring and observability tools to identify, diagnose, and resolve operational issues.
• Promote good engineering practices including testing, code quality, security, and automation.
• Identify opportunities to improve platform reliability, performance, and maintainability.
• Share knowledge and mentor other engineers through collaboration.

Benefits

• 20,000–28,000 PLN gross per month on an employment contract
• Private medical healthcare at LUXMED (including dental care) for you and your family
• Medicover sports card (Fit&More package)
• Life insurance financed by the employer
• 30-minute lunch break included in the 8-hour working day
• Work in a highly professional and stimulating atmosphere
• Training & Buddy program to adapt quickly to the role
• Wellbeing program for employees
• Co-financing of monthly public transport tickets in Kraków
• Comfortable office environment and possibility of home office
• Language courses, accounting courses, access to LinkedIn Learning, and co-financing studies/certifications
• Employee referral program

Requirements

• Strong experience building frontend applications with TypeScript, React, HTML, and CSS
• Experience with modern frontend architectures, including modular or microfrontend-based applications
• Strong understanding of web technologies, APIs, application architecture, and performance optimization
• Experience with automated testing tools such as Playwright and Jest
• Experience with CI/CD pipelines and modern software delivery practices
• Experience supporting and debugging applications in production environments
• Hands-on experience using observability and monitoring tools such as Datadog, CloudWatch, or similar platforms
• Practical experience with AWS services such as Lambda, API Gateway, S3, Valkey, and CloudFront
• Strong problem-solving and troubleshooting skills
• Excellent communication and collaboration skills
• Excellent command of English (written and spoken)