Posted Nov 2, 2026

JavaScript Developer (Mid-Level)

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Company Description:

Sipwise develops Software Solutions that are among the most widely used in the Telco community and contribute significantly to industry-standard open-source SIP software. We also provide years of experience in developing and operating large-scale internet service platforms.

Job Description:

We're looking for an experienced mid-level JavaScript Developer to help build and improve our products. You'll take ownership of features from requirements through to release, with the freedom to investigate problems, challenge requirements, and make technical decisions along the way.

You'll work closely with our Frontend Tech Lead, backend team and QA, with plenty of opportunity for discussion and collaboration when problems are complex or decisions have wider implications.

Qualifications:Additional Information:

We don't expect you to have used every technology in our stack. Strong engineering and JavaScript fundamentals, problem-solving ability, and the capacity to learn unfamiliar technologies matter more than matching every item on the list.

We value open discussion, healthy technical debate, feedback, and shared ownership of the codebase. If you want a role where your judgment matters, where you're trusted to solve problems rather than just complete tickets, and your work is clearly yours, we think you'll like it here.

Depending on the country in which you would like to work, we offer you an employment contract or a contract for work and services.

Professional experience building production frontend applications; proficiency with Git, JavaScript, RESTful APIs, testing frameworks (Jest, Cypress), Vue or other modern frameworks, TypeScript, Docker, and Bash scripting.

Key Responsibilities

Skills & Tools

Git, Vue, Jest, Cypress, React, Angular, TypeScript, Docker, Bash

Job Details

About Sipwise GmbH

A software company developing widely used open-source SIP solutions and operating large-scale internet service platforms. — Industry: Information Technology