Senior Frontend Developer

j-labs is a Polish software company founded in 2010, specializing in software development with expertise in Java, JavaScript, .NET, Kotlin, Python, QA, and DevOps. The company operates in three locations: Cracow, Warsaw, and Munich, serving over 75 clients across fintech, telco, e-commerce, travel & airlines, automotive, logistics, and banking sectors. It employs over 500 engineers with an average experience of 11 years, focusing on microservice and DLT centers of excellence including consulting, training, and software development.

• Very good knowledge of JavaScript
• Approximately 5 years of commercial experience in web application development
• Experience with Angular
• Knowledge of Node.js environment
• Practical knowledge of Clean Code and Clean Architecture principles
• Experience designing and implementing engineering best practices
• Understanding of distributed systems architecture
• Good knowledge of web technologies including HTTP, caching, security, and debugging
• Experience with web application performance, accessibility (A11y), and usability
• Ability to monitor production applications and analyze errors and metrics
• Very good command of English

• Participate in the full product lifecycle from problem identification to solution design, implementation, and effect analysis
• Design and develop frontend applications using Angular
• Create Backend for Frontend solutions in Node.js
• Collaborate with UX/UI designers to build modern user experiences
• Work with other product and platform teams
• Maintain code quality, perform tests, conduct code reviews, and follow engineering best practices
• Support and mentor less experienced developers