Full-Stack Engineer: Enterprise Security & Debugging

Newxel; Polska; On-site; PLN 120,000 - 180,000; Full time

Job summary

Newxel is seeking a Full-Stack Developer to join a team building and maintaining a large-scale mobile security platform. You will work primarily with backend systems while contributing to application development, troubleshooting production problems, and delivering fixes that improve product reliability.

You will collaborate with Support, Product, QA, and Engineering teams to translate customer findings into robust long-term solutions.

Qualifications

• 1–2 years of experience with Java, Node.js, TypeScript and React.
• Experience navigating and modifying a large-scale codebase.
• Familiarity with Unix environments and Bash.
• Strong understanding of server-side systems, distributed architectures, APIs, and databases.

Responsibilities

• Own the technical investigation and resolution of complex production challenges in large-scale backend environments.
• Modify and enhance large-scale codebase features across Java, Node.js, TypeScript, and React architectures.
• Translate real-world customer findings into long-term product and system fixes.
• Optimize API interactions, data processing routines, and server-side performance across distributed architectures.
• Collaborate with global Support, QA, Product, and Engineering teams to refine the endpoint security product roadmap.
• Utilize advanced debugging, log analysis, and profiling tools to perform root-cause investigations under tight constraints.

Skills

Java

Node.js

TypeScript

React

Education

Bachelor's degree in Computer Science or related field

Tools

Git

Unix Bash

CI/CD pipelines

Job description

Newxel is seeking a Full-Stack Developer to join a team building and maintaining a large-scale mobile security platform. You will work primarily with backend systems while contributing to application development, troubleshooting production problems, and delivering fixes that improve product reliability.

You will collaborate with Support, Product, QA, and Engineering teams to translate customer findings into robust long-term solutions.