Senior Fullstack Engineer (React / Python)(m/w/x)

## Senior Fullstack Engineer (React / Python) (m/w/d) ###### Permanent employee, Full-time ·Berlin Office,Remote --- ##### Our ideal match: We are looking for a **Senior Fullstack Engineer** to drive the development of our cloud-native platform. Our goal is to provide scalable e-learning and cyber security solutions for small and medium-sized businesses, reducing risks through modern, event-driven technologies. This role requires a true**Engineering mindset** —someone who can oversee the entire stack, jump into different layers of the architecture, and provide hands-on expertise where needed. ##### What you will be working on: * Feature & Service Development: Design and implement new product features, services, and business logic to enhance our platform’s functionality and user experience. * End-to-End Ownership: Develop and optimize APIs, microservices, and application workflows that support seamless user interactions and system integrations. * Frontend & Backend Collaboration: Build intuitive and performant user interfaces while ensuring backend services are scalable, efficient, and maintainable. * Business Logic Implementation: Translate business requirements into effective software solutions, working closely with product managers and designers. * Data-Driven Functionality: Develop features that leverage data insights, personalization, and automation using AWS services like Glue, QuickSight, and Athena. * Data & Insights Management: Oversee the collection, storage, and utilization of data to generate valuable insights for our partners, ensuring efficient data pipelines and analytics. * Security & Performance Optimization: Ensure best practices in security, authentication (Cognito, IAM), and performance tuning to deliver high-quality solutions. * Continuous Improvement & Innovation: Proactively identify areas for improvement in architecture, code quality, and development workflows. * Technical Leadership & Collaboration: Guide the team across frontend and backend decisions, mentor junior engineers, and support product managers in shaping product roadmaps. ##### Desired Experiences & Skills * Fullstack Development Expertise: Strong experience with modern frontend stack (React,TypeScript) and backend technologies (Python, Java). * Cloud-Native & Serverless Knowledge: Hands-on experience with AWS services, serverless patterns, and event-driven architecture. * AWS Lambda Proficiency: Demonstrated strong usage of AWS Lambda—authoring, deploying, and optimizing functions for scalable, event-driven solutions. * Infrastructure as Code Mastery: Proficiency in Terraform, AWS CDK, or CloudFormation. * Data & API Design: Knowledge of SQL/NoSQL databases, GraphQL, RESTful APIs, and AWS analytics tools. * Security & Compliance Awareness: Familiarity with IAM, OAuth, JWT, and cloud security best practices. * Problem-Solving & Hands-on Mentality: Ability to troubleshoot issues across the stack and work in a fast-paced environment. * Strong Communication & Teamwork: Comfortable working across disciplines and guiding developers and product managers on best practices. * 7+ years of professional experience in software delivery. Bonus: * You have experience setting up and maintaining Open edX on a cloud provider. * You bring general cybersecurity knowledge: understanding of security principles, vulnerability assessment, authentication mechanisms, and data protection practices. ##### Reasons to work with us: * Work on a cutting-edge cloud-native platform that impacts thousands of businesses. * Take ownership of the entire technology stack and drive architectural decisions. * Be part of an innovative, fast-growing company with strong industry partners. * Build a product with a purpose and help small businesses fight the ever-growing threat of cyberattacks. * Join a highly skilled team that values collaboration, innovation, and continuous learning. ##### Why you will love Perseus... * We offer you an open company culture with transparent communication and an open environment for feedback * We are a diverse and committed team, where mutual trust and support describe the basic building blocks of our cooperation * You get the opportunity to work in a great team in our centrally located office in Kreuzberg * You can benefit from flexible working hours and the opportunity to work remotely * Your professional and personal development is valued and evaluated on a regular basis * You receive benefits such as EdenRed, mobility budget, team events, etc. At Perseus, we promote diversity and inclusion by welcoming individuals from divers backgrounds. We value and embrace everyone, regardless of gender, ethnicity, sexual orientation or religion.