Senior Software Entwickler : in

RAKETENSTART; Köln; Hybrid; EUR 60.000 - 100.000; Vollzeit

Zusammenfassung

Ein innovatives Unternehmen sucht einen Senior Software Engineer, der die Zukunft der digitalen Unternehmensgründung mitgestaltet. In dieser spannenden Rolle sind Sie verantwortlich für die Architektur und Implementierung einer skalierbaren Plattform, die Tausenden von Gründern dient. Sie arbeiten eng mit einem hochmotivierten Team zusammen und haben die Möglichkeit, Ihre technischen Fähigkeiten in einem dynamischen Umfeld einzusetzen. Wenn Sie leidenschaftlich daran interessiert sind, neue Systeme zu bauen und die digitale Landschaft zu verändern, ist diese Gelegenheit perfekt für Sie.

Leistungen

Urban Sports Club

Flexibles Arbeiten

Regelmäßige Team-Events

Vollzeitvertrag

Volle Verantwortung für Ihren Technologiebereich

Qualifikationen

• 6+ Jahre Erfahrung als Software Engineer in schnelllebigen Tech-Umgebungen.
• Tiefe Kenntnisse in REST APIs und skalierbaren Systemen.

Aufgaben

• Leiten Sie das Design und die Implementierung unseres neuen Tech-Stacks.
• Architekt und bauen Sie unsere zukunftssichere Software-Infrastruktur von Grund auf.

Kenntnisse

REST APIs

Backend Architecture

Node.js

TypeScript

React

Next.js

Docker

Serverless Architecture

AWS

Google Cloud

Jobbeschreibung

Build the future of digital company formation with us

RAKETENSTART is the go-to platform for digital company incorporation – simple, fast, and legally compliant. Our mission : radically simplify bureaucracy in Germany, starting with company law and notarization processes. We’re growing fast and are now looking to take our scalable, powerful tech foundation to the next level.

As a Senior Software Engineer (m / f / d), you won’t just code – you’ll actively shape our tech vision and architecture for the years to come.

Who we are as a team :

We’re a small, high-performing team driven by impact, efficiency, and deep ownership. Every team member has real responsibility from day one. We believe in trust, speed, and automation – and we use AI & smart workflows everywhere possible to stay lean and deliver real results.

Your role :

• You’ll be part of the Tech Team, owning all digital & technical touchpoints.
• You’ll lead the design and implementation of our new tech stack and infrastructure.
• You’ll become our go-to person for APIs, automations, integrations & architecture.
• You’ll work cross-functionally with Product, Design & Support to solve complex problems.
• You’ll be a driving force in building a fast, reliable, and scalable platform that serves thousands of founders.
• You’ll mentor & upskill your team members with an open, growth-oriented mindset.
• Architect and build our future-proof software infrastructure from scratch.
• Maintain and extend full-stack services (TypeScript, Node.js, React, etc.).
• Drive the development of our client-facing APIs & robust documentation.
• Optimize and monitor integrations (e.g., Notaries, Banks, CRM tools).
• Improve performance, security, and scalability of the entire platform.

What you bring :

• 6+ years of experience as a Software Engineer, ideally in fast-paced tech environments.
• Deep knowledge of REST APIs, backend architecture & scalable systems.
• Solid experience with Node.js, TypeScript, React, Next.js, and Docker.
• Bonus : experience with serverless architecture, AWS or Google Cloud.
• You’re a builder at heart and love shaping architecture from the ground up.
• You document everything and are passionate about sharing your knowledge.
• You’re comfortable working autonomously and managing your own priorities.
• You thrive in cross-functional teams and enjoy collaborating with Product & Ops.
• Fluent in English (German is a plus, but not required).
• Start date : We are looking for someone to join as soon as possible. If you’re only available in 3+ months, it’s unfortunately not a fit for now.

This role is not for you if :

• You prefer only maintaining existing systems without building new ones.
• You need micro-management to stay productive.
• You’re not comfortable in a fast-changing startup environment.

What we offer :

• A competitive salary depending on your experience and benefits like Urban Sports Club.
• A permanent contract and full ownership of your tech area.
• The chance to shape the future of Europe’s leading Incorporation platform.
• Close collaboration with an ambitious, highly motivated founding team.
• Flexible working : hybrid setup in Cologne or remote-first, with regular team events.
• Fast decision-making, no politics – just smart, impactful work.

How to apply : Please send us :

• Your CV
• A short cover letter telling us why you’re a great fit for Raketenstart
• Optional) A link to your GitHub or past projects that you’re proud of

Important : We can only consider applications that match the required skills and include a personalized cover letter.

Senior Software • Cologne, North Rhine-Westphalia, Germany