Senior Full-Stack Developer (React / Node.js) (m / f / x)

osapiens Holding GmbH; Mannheim; Hybrid; EUR 60.000 - 80.000; Vollzeit

Zusammenfassung

A leading company in Mannheim seeks a Senior Full-Stack Developer to shape the future of Business Partner Transparency. The role involves building scalable solutions, mentoring junior developers, and collaborating within agile squads to meet critical sustainability compliance regulations.

Leistungen

Flexible work options

Team bonding events

Sustainable mobility options

Creative work environment

Qualifikationen

• Expertise in web services development and integration.
• Strong product mindset and experience with Agile methodology.
• Excellent communication skills in English; German is a bonus.

Aufgaben

• Design and optimize full-stack features using modern technologies.
• Develop innovative software solutions for compliance workflows.
• Collaborate with product managers, designers, and engineers.

Kenntnisse

Web services development

REST

GraphQL

Git

User experience focus

Agile methodology

Communication skills (English)

German (B1+)

Jobbeschreibung

As a Senior Full-Stack Developer, you’ll play a key role in shaping the future of Business Partner Transparency (BPT) within our osapiens HUB. This enterprise-grade platform helps companies comply with critical ESG regulations like :

• The German Supply Chain Due Diligence Act (LkSG) – ensuring suppliers uphold human rights and environmental standards.
• The Whistleblower Directive – providing secure, anonymous reporting channels.
• The Corporate Sustainability Due Diligence Directive (CSDDD) – upcoming EU-wide sustainability compliance.

Our osapiens HUB is a modern, enterprise-grade development platform that enables businesses to build powerful applications without worrying about infrastructure, scaling, or failover. You’ll help develop and refine this cutting-edge, serverless ecosystem while delivering meaningful solutions for international clients.

Activities

• Design, build, and optimize full-stack features using modern front-end and back-end technologies, ensuring scalability and maintainability.
• Develop and enhance innovative software solutions that automate complex compliance workflows for businesses of all sizes.
• Collaborate closely with product managers, designers, and engineers in small, agile squads (5-7 people) to define, refine, and implement features.
• Ensure high-quality, secure, and efficient code through rigorous reviews, automated testing, and continuous integration / deployment (CI / CD) practices.
• Contribute to technical strategy and decision-making, identifying opportunities for innovation and process improvements.
• Mentor and support junior developers, fostering a culture of learning and technical excellence within the team.

Requirements

• Expertise in web services development and integration (REST, GraphQL, etc.).
• Familiarity with Git for version control and collaboration.
• Strong product mindset – you think beyond code, considering user experience, business impact, and scalability.
• Agile experience – comfortable working in sprints, participating in stand-ups, and iterating quickly.
• Excellent communication skills in English (C1). German is a bonus (B1+)

Team

Join us for this and more...

• A purpose-driven mission with and for global industry pioneers in tackling complex challenges
• Room for creativity through collaborative teamwork and an open communication culture
• Flexibility and team bonding with our hybrid work options
• Fuel for your growth journey, both personally and professionally
• Sustainable mobility options, promoting eco-friendly commuting solutions
• Fun team events and outings with our global teams
• Inspiring workspaces in Mannheim and beyond

Application Process

• Discovery Call
• Video-Interview
• Meet the Team