Senior Full-Stack Engineer (m/w/d)

Your mission

As a Senior Full-Stack Developer, you will be a key contributor to our software systems that power our AI biomarker applications. You will work across the technology stack to deliver secure, scalable, and compliant systems that bridge state-of-the-art scientific research with real-world healthcare applications. This role requires someone who thrives in a fast-paced, highly collaborative startup environment and is eager to leave meaningful impact through software applications.

Full-Stack Development: Design, implement, and maintain scalable web applications and microservices using modern frameworks such as ReactJS, Flask, or Node.js.
API Development: Build secure and robust APIs for internal tools and third-party integrations.
Contribute to CI/CD pipeline setup, automated testing, and deployments using tools such as GitLab CI/CD or GitHub Actions
Cloud Infrastructure: Deploy and maintain cloud-native applications on AWS using Infrastructure-as-Code tools like Terraform.
Security & Compliance: Implement and adhere to secure development practices in line with HIPAA, GDPR, and ISO 27001 requirements.
Documentation & Traceability: Contribute to compliant software lifecycle processes (SSDLC, IEC 62304, ISO 13485) by documenting code, test cases, and development workflows.
Cross-functional Collaboration: Work closely with our product, science and QA teams to deliver features and iterate quickly on user feedback.

Your profile

Required Experience

5+ years in software development, ideally in full-stack roles.
Fluency in Python, Javascript & ReactJS.
Experience deploying and maintaining cloud applications on AWS.
Familiarity with Infrastructure-as-Code such as Terraform
Experience with Docker, Docker-Compose and Kubernetes
Knowledge of secure coding practices and privacy regulations (SSDLC, HIPAA, GDPR).
Experience with CI/CD tools and automated testing workflows.
Proven experience working in an Agile environment (e.g., Scrum)

Qualification & Skills

Bachelor's in computer science, engineering, or a related field (or equivalent experience).
Experience working in a fast-moving startup environment
Strong grasp of system design principles and debugging tools.
Excellent communication and documentation skills.
Passion for clean, maintainable code and scalable architecture.
Willingness to operate in a regulated software development environment.
Habit of staying current with emerging AI/dev tools, frameworks, and best practices.

Good to have

Exposure to regulated healthcare or medical device software (ISO13485).
Experience with bioinformatics, digital pathology, or clinical data.
Familiarity with AI/ML integrations or tools.

Why us?

The opportunity to make a real difference for cancer patients.
Competitive salary, stock options, and extra benefits.
A beautiful office near Alexanderplatz with an on-site gym, private showers, free drinks and snacks, rooftop bar, co-working space, and a quiet room for meditation or prayer.
Competing at the global top-tier of cancer research together with the founders, who are renowned researchers in the field of AI for biomarker development from medical imaging.
An extremely fast-paced and high-growth VC-funded start-up environment with key ownership from day 1.

About us

StratifAI is an innovative Berlin-based precision oncology startup developing the next generation of AI-based cancer biomarkers. The founders have published over 100 articles in top-tier journals and founded StratifAI to translate these novel ideas into patient care.

Our products enable cancer patients to receive the right treatment at the right time - both for existing drugs on the market, and by supporting pharmaceutical companies in developing the drugs of tomorrow.