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Senior Full-Stack Developer (Backend Focused) – 100% Remote, US Contract
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JavaScript

Senior Full-Stack Developer (Backend Focused) – 100% Remote, US Contract

33 - 44 USD/hNet per hour - B2B
33 - 44 USD/hNet per hour - B2B
Type of work
Full-time
Experience
Senior
Employment Type
B2B
Operating mode
Remote

Tech stack

    English

    B2

    TypeScript

    advanced

    Node.js

    advanced

    JavaScript

    advanced

    Angular

    nice to have

    Java

    nice to have

Job description

Online interview

Work 100% remotely for a US-based leader in cloud communications. Join a team building mission-critical APIs used by Airbnb, WhatsApp, Snapchat, and other global brands.

We’re looking for a Senior Full-Stack Developer with a strong backend focus (Node.js/TypeScript) to help evolve large-scale, real-time, event-driven systems. You'll contribute to new features, production improvements, and ensure high reliability and performance.


You'll work alongside experienced engineers passionate about high-quality, fault-tolerant systems powering real-time communication worldwide.


What you’ll do

  • Design and build new features in a large-scale, event-driven platform.

  • Improve performance, reliability, and fault tolerance of production systems.

  • Work with APIs and SDKs used by global brands.

  • Collaborate with experienced engineers in a remote-first team.

  • Get hands-on with real-time communication systems and cloud technologies.


Required skills

  • Minimum 5 years of professional experience in software engineering.

  • Strong backend experience (Node.js / TypeScript; Java is a big plus)

  • Solid frontend experience (JavaScript / TypeScript / HTML / CSS; Angular is a big plus).

  • Excellent debugging and problem solving skills.

  • Experience with automated testing frameworks and platforms.

  • Good understanding of algorithms, data structures, memory management, and concurrency.

  • Database knowledge.

  • Source control (Git) / Agile development practices.

  • Effective remote collaboration and communication skills.


Nice to have:

  • Familiarity with API design and/or SDK development.

  • Cloud technologies such as AWS, Kubernetes, Helm, Docker.


What we offer

  • 100% remote work with flexible hours in Polish time zone

  • Direct contract with a US company – stable, long-term cooperation

  • Competitive B2B rates (up to 160 PLN/h)

  • Work on mission-critical systems with real impact

  • Polish public holidays respected

  • Recruitment process: 1–2 technical interviews with senior engineers from the team.


33 - 44 USD/h

Net per hour - B2B