AI / Full-Stack Developer

Job Description

We are looking for an experienced AI / Full-Stack Developer to design, develop, and implement scalable, intelligent applications that combine modern web technologies with Artificial Intelligence and Machine Learning capabilities. The role focuses on end-to-end application development, AI integration, backend services, and user-friendly interfaces to support business automation, advanced analytics, and data-driven decision-making. Working closely with solution architects, data engineers, and business stakeholders, the developer ensures seamless integration between AI services, enterprise platforms, and modern applications while maintaining high standards of performance, security, and scalability.

Key Responsibilities

• Design, develop, and maintain full-stack applications integrating AI/ML capabilities with modern web technologies and enterprise systems.
• Build responsive and user-friendly front-end applications using frameworks such as React, Angular, or Vue.js.
• Develop scalable back-end services, APIs, and application logic using Python, Node.js, or similar technologies.
• Integrate AI/ML models, Large Language Models (LLMs), and generative AI services into business applications and workflows.
• Develop and implement AI-powered functionalities, including intelligent automation, predictive analytics, and data-driven applications.
• Design and maintain REST APIs, microservices, and integration components connecting applications with enterprise data platforms.
• Collaborate with data engineers and AI specialists to integrate machine learning models, data pipelines, and external AI services.
• Implement authentication, authorization, data protection, and application security best practices.
• Optimize application performance, scalability, and reliability across front-end, back-end, and AI components.
• Support application testing, debugging, deployment, technical documentation, and continuous improvement initiatives.

Qualifications

• Strong hands-on experience in full-stack software development, including front-end and back-end application development.
• Proficiency in Python, JavaScript, or TypeScript, with experience using modern development frameworks.
• Experience developing front-end applications using React, Angular, Vue.js, or similar technologies.
• Strong knowledge of back-end development frameworks such as FastAPI, Django, Flask, Node.js, or Express.
• Experience integrating AI/ML models, LLMs, or generative AI services into enterprise applications.
• Familiarity with AI frameworks and services such as LangChain, OpenAI APIs, Azure OpenAI, or similar technologies.
• Solid understanding of REST APIs, microservices architecture, databases, and system integration.
• Experience working with SQL and NoSQL databases, data processing, and enterprise data platforms.
• Knowledge of cloud platforms such as Microsoft Azure, AWS, Google Cloud, or SAP BTP.
• Understanding of CI/CD pipelines, containerization technologies such as Docker, and modern software development practices.
• Strong analytical, problem-solving, and communication skills, with the ability to work effectively across technical and business teams.

Additional Information

Offered benefits

• Great package: We provide a competitive salary and benefits package, along with an outstanding work environment that fosters long-term career development opportunities.
• People Focus: Unite with the best global talent in life sciences, empowered to grow and collaborate in a vibrant environment.
• Truly Global: Join a truly global organization where mutual support, teamwork, and diversity drive our collective success.
• Grow Your Skills: Join regular workshops, academies and trainings - inhouse workshops und training (optional)
• Invest in Your Learning: Access CHF 1,500 (approx. 280k JPY) annually for professional development

Corporate culture and work life balance

• Flat hierarchies: Speak your mind and grow with close mentoring by senior leaders
• Remote workstyle: Work from anywhere in Japan (if client project allows)
• Working location: Temp office in Shinbashi/Client or Project site
• Work flex: Enjoy 25 days of flexibility to work from your preferred global location (under client’s permission)
• Annual vacations: of up to 20 days (depending on seniority)
• Time Off: Take the time you need to recharge and maintain a healthy work-life balance, with flexibility beyond standard holiday allowances.
• Connect as a Team: We use our team’s integration budget to meet, collaborate, and bond
• Celebrate Your Birthday: Receive a special gift from Fusion on your birthday
• Anniversary bonus program: Receive substantial bonuses on special work anniversaries (5, 10, 15 years)
• Bonus programs: 10% annual performance bonus, based on company KPIs.
• Refer Talent reward program (up to Director) : Offers bonuses if your referral is hired by Fusion
• Truly Global: Join a truly global organization where mutual support, teamwork, and diversity drive our collective success.