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Senior Full-Stack Developer

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ELEKS

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Location:
Poland; Croatia

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

Not provided
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Job Description:

Our customer is a global life sciences & healthcare organization whose mission is to improve the quality of people’s lives worldwide. Their digital products directly support life-saving therapies and healthcare research used by millions of patients and their families. This company works with leading pharmaceutical, biotech, and government partners and plays a critical role in accelerating the delivery of new treatments to the market. Tech Stack: React, Node.js, Typescript, Next.js, Fastify.

Job Responsibility:

  • Design, develop, and maintain reliable software in line with technical requirements, focusing on performance and availability
  • Analyze requirements, review designs, and estimate user stories following project methodology (Agile, Waterfall, etc)
  • Proactively propose code refactoring and optimization improvements according to the best software development practices and coding standards
  • Help maintain and improve high-quality standards within the developer community by sharing knowledge, conducting tech talks, and participating in the internal promotion verification process
  • Stay up-to-date with modern technology and obtain professional certifications
  • Support less experienced developers by providing training, distributing, and monitoring tasks

Requirements:

  • 5+ years of professional experience in software engineering
  • Strong hands-on experience with Node.js and React in building and maintaining production-grade applications
  • Experience with Fastify is a strong advantage
  • Excellent knowledge of JavaScript, HTML, and CSS (experience with SCSS/LESS is a plus)
  • Proven experience in designing and consuming RESTful APIs (GraphQL knowledge is a plus)
  • Solid understanding of cloud-native development, CI/CD pipelines, and containerization (Docker, Kubernetes)
  • Strong grasp of software architecture, SOLID principles, and security best practices
  • Experience working with databases such as PostgreSQL, MongoDB, and Redis
  • Upper-intermediate or higher level of English (written and spoken)
  • Willingness to travel occasionally to Ireland

Nice to have:

  • Familiarity with monitoring and observability tools (Prometheus, OpenTelemetry)
  • Exposure to AI/ML tools (e.g., GitHub Copilot, OpenAI API)
What we offer:
  • Close cooperation with a customer
  • Challenging tasks
  • Competence development
  • Ability to influence project technologies
  • Team of professionals
  • Dynamic environment with low level of bureaucracy

Additional Information:

Job Posted:
January 22, 2026

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