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Senior Fullstack Developer @ Link Group
  • Kraków
Senior Fullstack Developer @ Link Group
Kraków, Kraków, Lesser Poland Voivodeship, Polska
Link Group
21. 10. 2025
Informacje o stanowisku

We are looking for a Senior Full Stack Engineer to play a key role in building the next generation of enterprise-grade applications and cloud platforms. You’ll design, develop, test, and scale highly available distributed systems and backend services while contributing to frontend development when needed. This is a hands-on role where you’ll drive architectural decisions, mentor peers, and bring innovation into complex SaaS environments.

If you are passionate about building impactful, high-performance software and thrive in an agile, collaborative setting where engineers innovate and solve real customer problems, we’d love to hear from you.


  • Bachelor’s degree in Computer Science or equivalent professional experience.
  • 5+ years of professional software engineering experience, with a focus on full stack or backend platform development.
  • 4+ years building large-scale, multi-tenant SaaS applications with a focus on backend frameworks, RESTful APIs, and microservices.
  • 2+ years of experience with public cloud platforms (AWS, Azure, or GCP) and understanding of cloud-native services.
  • Strong command of an object-oriented language, preferably C# (Java or similar also acceptable).
  • Solid understanding of data structures, algorithms, design patterns, and high-concurrency systems.
  • Experience designing or delivering core platform components such as:
    • API gateways
    • Authentication and identity management
    • Messaging systems (Kafka, RabbitMQ)
    • Workflow orchestration and job scheduling
    • Search services (e.g., Elasticsearch)
  • Hands-on experience with SQL and NoSQL databases, including data modeling and transactional flows.
  • Proficiency in testing practices, including unit, integration, and automated functional testing.
  • Familiarity with service-oriented and serverless architectures.
  • Understanding of internet security principles in software design and implementation.
  • Strong analytical and problem-solving abilities, with excellent written and verbal communication skills.
  • Experience working in Agile/Scrum environments.
  • Passion for engineering excellence through automation, code quality, and continuous improvement.

Nice to Have

  • Experience integrating with ERP platforms (SAP, Oracle, NetSuite, Microsoft).
  • Background in FinTech or financial services domains.
  • Familiarity with integration platforms such as Apache NiFi.
  • Experience with search technologies (Elasticsearch or similar).
  • Exposure to API management tools such as Apigee or Okta.

We are looking for a Senior Full Stack Engineer to play a key role in building the next generation of enterprise-grade applications and cloud platforms. You’ll design, develop, test, and scale highly available distributed systems and backend services while contributing to frontend development when needed. This is a hands-on role where you’ll drive architectural decisions, mentor peers, and bring innovation into complex SaaS environments.

If you are passionate about building impactful, high-performance software and thrive in an agile, collaborative setting where engineers innovate and solve real customer problems, we’d love to hear from you.

,[Design, develop, test, and maintain scalable, secure, and high-performance backend services and APIs., Build and optimize multi-tenant SaaS applications using microservices and cloud-native architectures., Contribute to system architecture, design discussions, and long-term technical strategy., Create and maintain functional and technical specifications, test plans, and documentation., Review and improve code written by peers, ensuring adherence to engineering standards and best practices., Research, benchmark, and recommend new frameworks, technologies, and patterns to enhance platform capabilities., Implement robust testing strategies — including unit, functional, and automated tests — to ensure end-to-end quality., Drive continuous improvement of software integration, security, and performance practices., Participate in project planning, including estimation, dependency management, and delivery timelines., Collaborate cross-functionally with product, QA, and DevOps teams to deliver high-quality releases., Provide mentorship and technical guidance to less experienced engineers., Support production deployments, monitoring, and release processes, including occasional off-hours assistance. Requirements: RESTful API, Microservices, AWS, Azure, GCP, C#, Java, Data structures, Algorithms, API Gateway, Authentication, Kafka, RabbitMQ, Elasticsearch, SQL, NoSQL, Testing, Data modeling, ERP, SAP, Oracle, NetSuite, Microsoft, FinTech, Apache NiFi, Apigee, Okta

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