Java Backend Engineer
Posted Updated
Summary
Java Backend Engineer (Kraków, hybrid, B2B) building back-end services and REST APIs for source registration, metadata management and a Knowledge Platform — including external API integrations, SQL/NoSQL persistence, observability and CI/CD. Pay is 28.4k–31.5k PLN net/month.
Czym będziesz się zajmować?
- Build back-end services and REST APIs for source registration, metadata retrieval and lifecycle management
- Develop integrations with external sources, handling pagination, rate limits, errors and content changes
- Design and evolve the metadata model (identifiers, versioning, content hashes, ownership, relationships)
- Create reliable data contracts and persistence layers with idempotent, safe reprocessing
- Build reusable components for classification, enrichment, provenance, lineage and data quality
- Add observability to services: status, latency, error classification, logs, metrics and traces
- Integrate with the Knowledge Catalogue and the wider Knowledge Platform
- Write unit, integration and contract tests, and contribute to CI/CD and production support
- Work closely with the Technical Lead, architects and analysts to turn requirements into production-ready solutions
Kogo poszukujemy?
- Experience building and running production-grade back-end services
- Strong Java skills (or a similar language), with a focus on clean, testable code
- Hands-on experience designing REST APIs, data models and schema evolution
- Solid SQL and relational database design skills (keys, constraints, indexing, transactions)
- Familiarity with NoSQL and graph databases (LPG/RDF)
- Understanding of versioning, idempotent processing, data lineage or data quality concepts
- Experience integrating external APIs and working with structured and unstructured data
- Practical knowledge of cloud services, CI/CD and observability
- Strong problem-solving skills and a collaborative mindset
Czego wymagamy?
Znajomości:
- Java
- REST
- SQL
- NoSQL
- CI/CD
- Polski
- Angielski
Jakie warunki i benefity otrzymasz?
- 28.4k–31.5k PLN netto/m (B2B)
- B2B - Elastyczne godziny pracy (100%)
- Praca zdalna: Hybrydowo
Kim jesteśmy?
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