Sidebase Open-Source Contributor & Senior TS Dev

Sidestream · Cologne

Remote May 8, 2026

Job Summary

Join Sidestream as an Open-Source Contributor & Senior TypeScript Developer to work on impactful projects, engage with the developer community, lead fullstack development, mentor junior developers, and collaborate with product managers. Ideal candidates are open-source enthusiasts, tech-savvy with TypeScript/JavaScript expertise, and passionate collaborators. Share why you're excited about this role and what makes Sidestream appealing.

Key Responsibilities

Contribute to open-source projects like Sidebase and engage with the developer community.
Lead fullstack development using TypeScript, Nuxt3, and Vue.
Mentor junior developers and collaborate with product managers.

Who This Role Suits

Open-source enthusiasts with community engagement experience.
Tech-savvy individuals proficient in TypeScript/JavaScript and frameworks like Vue or React.
Passionate collaborators excited about shaping the future of open-source.

Tips to Apply

Share why you're excited about the role and what makes Sidestream appealing.
Include links to showcase your skills and contributions.
Demonstrate your proficiency in TypeScript, Nuxt3, and Vue.

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Full Job Description

Why Join Sidestream?

At Sidestream, we’re building a team of committed, explorative and witty individuals who love pushing boundaries while having fun. Here’s what you can expect:

Impactful Work: Contribute to projects that matter, whether it’s digitalizing leading companies, developing open-source tool or innovating with blockchain and AI.
Learning & Growth: Gain mentoring from experienced professionals and access to proven processes that prepare you for success in a fast-paced tech environment.
Our Culture of Excellence: Embrace modern systems like the Entrepreneurial Operating System (EOS) to deliver outstanding performance and achieve ambitious goals.
Collaboration & Fun: Be part of a driven team that values humor, creativity and shared experiences, with regular team events and occasional meetups.
Flexibility: Work remotely, from our modern office in Cologne, or a mix of both—whatever helps you thrive.

Tasks

Your Responsibilities

Contribute to Open Source: Write, maintain, and enhance open-source projects like Sidebase and actively engage with the developer community.
Community Engagement: Address issues, create documentation, and develop a vision for open-source initiatives.
Fullstack Development & Technical Lead: Build robust applications using TypeScript, Nuxt3 and Vue. Collaborate with product managers to conceptualize, architect and implement projects in agile teams.
Mentor and Guide: Help junior developers level up their skills through mentoring and collaborative projects.

Requirements

What You Bring

Open-Source Enthusiast: You have experience contributing to open-source projects and actively engaging with the community.
Tech-Savvy: You’re proficient in TypeScript or JavaScript and have a solid understanding of frameworks like Vue or React.
Modern Tech Explorer: You enjoy working with cutting-edge technologies like Nuxt 3 and Kubernetes, staying ahead of the curve.
Craftsmanship in Code: You take pride in writing clean, composable, and peer-reviewed code that meets high-quality standards.
Passionate Collaborator: You’re excited about shaping the future of open-source and love working with others to bring ideas to life.
Hands-On Problem Solver: You’re open to a real-life coding challenge during the application process. We value developers who enjoy rolling up their sleeves and writing great code, not just technical managers.
Strong Communicator: Your can communicate great in English (and German is a bonus).

No cover letter required! Instead, share 2-3 sentences about why you’re excited about this role and what makes Sidestream appealing to you. You can also include links to projects you’ve worked on to give us an impression of your skills and contributions.

Find more English Speaking Jobs in Germany on Arbeitnow

Skills

javascript typescript react vue go java kubernetes fullstack ux ui ai api remote Remote Software Development

Frequently Asked Questions

This Sidebase Open-Source Contributor & Senior TS Dev position is suitable for Mid-level professionals. Sidestream is looking for candidates with proven experience in the key skills mentioned, typically 2-5+ years depending on the specific requirements.

Yes, this is a fully remote Sidebase Open-Source Contributor & Senior TS Dev position. You can work from anywhere with a reliable internet connection.

Key skills for this Sidebase Open-Source Contributor & Senior TS Dev position include: javascript, typescript, react. Having a strong foundation in these areas will make your application competitive. Experience with related tools and frameworks is also valuable.

To apply, click the 'Apply' button on this page, which will direct you to Sidestream's application portal. Have your resume, portfolio (if applicable), and a compelling cover letter ready.

Salary ranges vary based on experience and location. Check the job posting for specific compensation details, or research similar Sidebase Open-Source Contributor & Senior TS Dev positions in your area.

Highlight relevant experience with javascript, typescript, react. Include specific projects, achievements, and measurable results. Tailor your resume to match the job description, focusing on how your background aligns with Sidestream's needs.

Most hiring processes take 2-4 weeks from application to offer. This may include initial screening, technical assessments, interviews, and background checks. Sidestream will keep you informed throughout each stage.