Senior Frontend Developer

Teleste; Wrocław; On-site; PLN 150,000 - 230,000; Full time

Benefits offered by this job

International projects

Individual development path

Friendly and casual atmosphere

Permanent contract

Hybrid work model

Private healthcare (Luxmed) & Multisep

Job summary

Teleste is seeking a Senior Frontend Developer to shape the user experience of a large-scale enterprise video management and situational awareness system. You will tackle complex UI challenges, migrate legacy components, and collaborate across teams to deliver high-quality software.

You will work with a modern stack (JavaScript/TypeScript, Angular, NgRx, RxJS) and contribute to UI libraries, testing, and documentation.

Qualifications

• 5+ years of professional frontend experience on large-scale apps.
• JavaScript and TypeScript proficiency with clean, maintainable code.
• Strong knowledge of Web APIs, browsers, HTTP/WebSockets.
• Experience with Angular, NgRx, RxJS in a large project.
• Experience migrating legacy code (jQuery/AngularJS).
• Testing strategies: unit, integration, end-to-end.
• Excellent communication in technical and non-technical contexts.
• English min. B2 and Polish min. C2.

Responsibilities

• Design new UI flows to enhance UX in the enterprise system.
• Contribute to UI component library ensuring consistency and reuse.
• Migrate legacy components to modern web standards for performance.
• Collaborate with backend to define APIs and optimize data flows.
• Write robust tests and documentation for maintainability.
• Work with PMs to refine requirements and influence roadmap.
• Drive UI/UX innovation and product shape.

Skills

5+ years frontend

JavaScript

TypeScript

Angular

NgRx

RxJS

Testing strategies

Web APIs

Communication

English B2

Tools

Docker

Job description

As a Senior Frontend Developer, you will play a key role in shaping the user experience of our large-scale enterprise video management and situational awareness system. You will work on complex UI challenges, drive modern frontend best practices, and collaborate closely with cross-functional teams to deliver high-quality software.

Your Responsibilities

• Design and develop new UI flows to enhance user experience and functionality in our enterprise system.
• Contribute to our UI components library, ensuring consistency, scalability, and reusability across the application.
• Migrate legacy components to modern web standards, improving performance, maintainability, and accessibility.
• Tackle real-time challenges, such as rendering dynamic maps with thousands of live features, integrating live CCTV streaming, and managing complex alarm notifications.
• Write robust tests and documentation to ensure reliability, maintainability, and ease of onboarding for other developers.
• Work closely with backend teams to define API contracts, optimize data flows, and integrate services efficiently.
• Collaborate with product managers (PMs) to refine requirements, provide technical insights, and influence the product roadmap.
• Have a real impact on the product shape, contributing ideas, identifying areas for improvement, and driving innovation in UI/UX.

Your assets

• 5+ years of documented professional experience in frontend development, working on large-scale applications.
• Proficiency in JavaScript and TypeScript, with the ability to write clean, maintainable, and efficient code.
• Deep understanding of Web APIs, browser mechanics, and web standards/protocols (e.g., HTTP, WebSockets).
• Strong experience with a modern frontend framework and state management solution in a large-scale project (we use Angular, NgRx, RxJS).
• Hands-on experience with legacy web technologies, such as jQuery and AngularJS, with the ability to migrate and modernize existing codebases.
• Expertise in testing complex UI flows, including unit, integration, and end-to-end testing strategies.
• Great communication skills, with the ability to effectively collaborate in both technical and non-technical environments.
• English min. B2, Polish min. C2.

Nice if you also have:

• Understanding of media streaming technologies (e.g., HLS, WebRTC) and their integration into web applications.
• Experience with GIS (Geographic Information Systems), including mapping libraries and spatial data visualization.
• Knowledge of UI design systems, component libraries and best practices for maintainable design.
• Familiarity with Docker and containerized frontend development environments.

What do we offer?

• International projects.
• Individual development path and close-knit team.
• Friendly and casual atmosphere of work (no open space, no dress code).
• Permanent contract.
• Hybrid model of work; in some cases fully remote might be considered.
• Private healthcare (Luxmed) & Multisport card - co-financed by Teleste.
• Flexible working hours (start time between 7:00 a.m. and 10:00 a.m.).