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Backend Developer

Kraków, małopolskie💼 Full-time🗓 2026-04-28 → 2026-08-10

Core

Designing and developing scalable, high-quality backend systems and modern architecture initiatives.

Role type

Senior Backend Engineer (Microservices & Event-Driven)

Builds

Scalable, fault-tolerant applications and production-ready solutions

Domain

Enterprise software engineering, Cloud infrastructure

Deliverable

production ML models | product features | infrastructure

Required skills

Java 8+, Spring Framework, Spring Boot, Spring Cloud, Kubernetes, Docker, Microservices Architecture, Event-Driven Architecture, REST/GraphQL API design, SQL/NoSQL databases, Messaging middleware (Kafka, RabbitMQ), Security mechanisms (JWT, OAuth, TLS), CI/CD pipelines

Preferred skills

Technical leadership, mentoring junior engineers, cross-functional collaboration

Technologies

Java, Spring, Kubernetes, Docker, Kafka, RabbitMQ, Oracle, PostgreSQL, MySQL, MongoDB, Cassandra, Jenkins, GitLab

Responsibilities

Design and develop highly scalable, performant, and fault-tolerant applications; Contribute to the evolution of Microservices and Event-Driven Architecture; Collaborate with Solution Architects and Tech Leads to translate technical designs into production-ready solutions; Design systems with a strong focus on security, infrastructure, and data governance standards; Ensure coding standards and promote best practices in development, testing, and documentation; Mentor junior engineers, conduct code reviews, and provide technical leadership

Seniority

Senior, hands-on IC with leadership responsibilities

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