Senior Backend Engineer

Seargin; Polska; On-site; PLN 180,000 - 260,000; Full time

Job summary

Seargin is an international technology transformation and delivery partner seeking a Senior Backend Engineer with strong cloud-native and backend development experience. You’ll work on Kubernetes-based deployments using Java and PostgreSQL in distributed systems.

Ideal candidates have hands-on Kubernetes, Java and PostgreSQL, and familiarity with Spring Boot. English is required; German language skills are a strong advantage as you collaborate with international teams across Europe and beyond.

Qualifications

• Strong hands-on experience with Kubernetes and containerized backends.
• Proficiency in Java and PostgreSQL for backend services.
• Knowledge of Spring Boot is a plus.
• Solid understanding of distributed systems and cloud-native patterns.
• Good command of English; German is a strong advantage.
• Practical experience with n8n is a plus.

Responsibilities

• Develop and maintain backend services using Java and PostgreSQL.
• Work with Kubernetes and containerized environments.
• Support cloud-native platforms' development and operation.
• Design and maintain solutions within distributed systems.
• Ensure reliability, scalability, and performance of backend apps.
• Collaborate with engineering teams to deliver robust solutions.

Skills

Kubernetes

Java

PostgreSQL

Spring Boot

Distributed systems

Containerization

English

German language skills

n8n

Job description

Seargin is an international technology transformation and delivery partner helping global enterprises turn complex technology challenges into measurable business outcomes.

With 1,000+ technology professionals and a presence across Europe, the United States and Asia, we work with leading international organisations, including Fortune 500 companies, on business-critical transformation and technology initiatives.

Our expertise spans SAP and Enterprise Transformation, Data & AI, M&A and Post-Merger Integration, Application & Managed Services, and complex technology delivery.

What makes Seargin different is our ability to combine strategic expertise with hands‑on execution. We don’t just advise on transformation - we help design, build, implement and operate the solutions that make it successful.

At Seargin, you’ll have the opportunity to:

* Contribute to meaningful projects for globally recognised organisations.

* Work with experienced technology professionals in international environments.

* Develop your expertise across complex enterprise technologies and business challenges.

* Take ownership, share ideas and make a tangible impact.

* Grow your career in a collaborative, ambitious and internationally connected organisation.

Join Seargin and help shape the technology behind global business transformation.

About the role

We are looking for a Senior Backend Engineer with a strong background in cloud‑native platforms, backend development, and containerized environments. The ideal candidate has hands‑on experience with Kubernetes, Java, and PostgreSQL, along with a solid understanding of modern distributed systems.

Must-have Requirements

• Strong hands‑on experience with Kubernetes.
• Experience with Java and PostgreSQL.
• Knowledge of Spring Boot is a plus.
• Solid understanding of distributed systems and containerized environments.
• Good command of English.
• German language skills are a strong advantage.
• Practical experience with n8n is a plus.

Responsibilities

• Develop and maintain backend services using Java and PostgreSQL.
• Work with Kubernetes and containerized environments.
• Support the development and operation of cloud‑native platforms.
• Design, implement, and maintain solutions within distributed systems.
• Ensure the reliability, scalability, and performance of backend applications.
• Collaborate with engineering teams to deliver and maintain robust technical solutions.

To learn more about Seargin, please visit our web page: www.seargin.com