Senior Full-Stack Engineer — Frontend Focus (Hybrid)

Xperi Inc.; Warszawa; On-site; PLN 120,000 - 180,000; Full time

Job summary

Xperi POLAND sp. z o.o. in Warsaw is seeking a software engineer to contribute to web frontend features, client-server communication, and complex API integrations while collaborating with cross-functional teams to deliver high-quality software.

You will participate in code reviews, help shape architecture, and consistently improve the codebase. The role requires strong JavaScript skills, Node.js experience, and a proactive, collaborative mindset.

Qualifications

• 4+ years of experience in software development.
• Hands-on experience with Node.js or another backend language.
• Proficiency with testing frameworks (e.g., Jest, Puppeteer).
• Knowledge of state machines model (e.g. XState library).
• Solid understanding of good coding practices (e.g., linting).
• Knowledge of design patterns and ability to contribute to high-level designs, UML diagrams, and API definitions.
• Familiarity with Jenkins, GitHub, Jira, and Confluence.
• Basic knowledge of UNIX-based systems.
• Good spoken and written English (minimum B2 level).
• Initiative, ownership, and a strong sense of responsibility.
• Curious and analytical mindset - eager to understand why things work, not just if they work.
• Strong communication skills and openness to collaboration.

Responsibilities

• Implement new features in web frontend applications, focusing on client-server communication and handling complex API integrations.
• Collaborate with frontend, backend, QA, and Product Owner teams.
• Maintain and improve the quality of the codebase.
• Participate in code reviews and ensure high code quality.
• Contribute to architectural decisions.

Skills

Node.js

Jest

Puppeteer

XState

Linting

Design patterns

UML

API design

UNIX basics

English (B2)

Team collaboration

GitHub Copilot

Tools

Jenkins

GitHub

Jira

Confluence

Job description

Xperi POLAND sp. z o.o. in Warsaw is seeking a software engineer to contribute to web frontend features, client-server communication, and complex API integrations while collaborating with cross-functional teams to deliver high-quality software.

You will participate in code reviews, help shape architecture, and consistently improve the codebase. The role requires strong JavaScript skills, Node.js experience, and a proactive, collaborative mindset.