Fullstack Developer - Backend background (he/she)

O projekcie: Our projects At the Engineering Competence Center, we deliver services and projects for the Automotive, Rail, and Oil & Gas sectors. Our specialized engineering teams work within project and competency groups, whose activities we manage. We also conduct training and certification programs to enhance the engineering competencies of our consultants. Position We are currently looking for a candidate for the position of Fullstack Developer(he/she) for our client from the biotechnology industry. Offered salary Salary: from 750 to 1150 PLN net/day, depending on experience and competences. What We Offer - Long-term collaboration - Technical training, certifications, and skills development - Competence Center mentoring - being a member of the Competence Center community from day one is an opportunity to develop your skills, participate in various conferences, and share knowledge and experience with people who face the same challenges every day - Clear career path - Employee benefits package (Multisport, private healthcare, life insurance) - Friendly working atmosphere, team-building events, and team-building meetings Ref number AO224608 Wymagania: - Have extensive experience with Node.js (v18 or later) and the JavaScript/TypeScript ecosystem, enabling you to build and maintain scalable backend services. - Have a strong understanding of NestJS, including modules, providers, controllers, and middleware, and experience developing well-structured backend applications. - Have proven experience building complex single-page applications (SPAs) using React, including tools such as Hooks, Context API, or state management libraries. - Have hands-on experience with Neo4j (Desktop or Server) and strong proficiency in Cypher, with the ability to design and manage graph-based data models. - Have a solid background in RESTful API design and experience integrating various external APIs and third-party services. - Are comfortable working with modern development tools, including Git, NestJS CLI, and package managers such as npm or yarn. Codzienne zadania: - Backend Architecture: Design, develop, and maintain scalable and robust server-side applications using NestJS and Node.js (v18+), ensuring high performance and reliability. - Frontend Development: Build and maintain responsive, high-performance user interfaces using React, ensuring a seamless user experience across devices. - Graph Data Management: Design and manage complex data models in Neo4j, writing efficient Cypher queries to handle highly connected data structures and optimize database performance. - API Development: Develop, document, and maintain secure, well-structured RESTful APIs, as well as integrate third-party services and external systems. - System Integration: Ensure smooth communication between backend services, frontend applications, and external APIs. - DevOps & Tooling: Manage project dependencies and development workflows using npm or yarn, and support reliable deployment processes.