Senior Full-Stack Developer-NodeJS/ReactJS

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

Zusammenfassung

A technology company based in Mannheim is seeking a Senior Full-Stack Developer specializing in Node.js and ReactJS. In this role, you will design and optimize full-stack features and collaborate with agile teams to deliver innovative software solutions. The position embraces a hybrid work model, allowing flexibility while fostering teamwork. Ideal candidates will have strong skills in TypeScript, agile development, and effective communication in English, with German being an advantage.

Leistungen

Flexible work options

Creative teamwork environment

Personal and professional growth opportunities

Team events and outings

Sustainable mobility options

Qualifikationen

• Strong experience in full-stack development, specifically using Node.js, ReactJS, and TypeScript.
• Expertise in web services development and integration.
• Excellent communication skills in English; German is a bonus.

Aufgaben

• Design, build, and optimize full-stack features using modern technologies.
• Collaborate with product managers and designers in agile squads.
• Mentor junior developers and contribute to technical strategy.

Kenntnisse

Full-stack development

Node.js

ReactJS

JavaScript

TypeScript

Web services development

Agile methodologies

Communication skills

Tools

Git

Jobbeschreibung

Senior Full-Stack Developer-NodeJS/ReactJS

Department: Business Partner Transparency

Employment Type: Permanent - Full Time

Location: Mannheim

Description

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.

This role is based in Mannheim, a vibrant tech hub at the heart of Germany, where you'll collaborate with a talented, forward-thinking team. We embrace a hybrid work model, with three days a week in the office, ensuring the perfect balance between in-person collaboration and remote flexibility.

Key Responsibilities

• 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.
• Own the architecture and design of JavaScript-based solutions, optimizing for performance, reliability, and user experience.
• 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.

Skills, Knowledge and Expertise

• Strong experience in full-stack development with a focus on Node.js (Mainly), ReactJS, JavaScript, and TypeScript (Mandatory)
• 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+)

Benefits

• 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