📍 Warsaw (Onsite – near Metro Plac Wilsona)

💼 B2B / Freelance

About Silk Software House

Silk Software House builds and maintains mission-critical backend systems for fintech, payments, and large-scale platforms. We value strong engineering judgment, ownership, and long-term cooperation over short-term delivery pressure.

Your Role

As a Senior Java Developer, you’ll take technical ownership of backend services, influence architectural decisions, and mentor other engineers. You’ll work directly on complex domains where performance, security, and reliability matter.

Responsibilities

Design and implement backend architectures using Java 11+ and Spring
Lead development of microservices and APIs
Optimize performance, scalability, and data consistency
Work deeply with Hibernate, transactions, and database internals
Review code, mentor developers, and set engineering standards
Collaborate with DevOps on deployments and observability

Requirements

This role requires full-time onsite work (no remote or hybrid options). Candidates must be willing and able to work from our office near the Plac Wilsona metro station
5+ years of commercial experience as a Java Developer
Strong commercial experience with Java & Spring (Boot, Security, Data)
Deep knowledge of Hibernate ORM, SQL databases, and JVM behavior
Experience designing scalable, maintainable backend architectures
Proficiency with CI/CD, Git, Gradle, and production debugging
Effective use of AI-assisted development tools (ChatGPT, Claude, Cursor, Grok)
English at B2+ level

Nice to Have

Event-driven architecture (Kafka, queues)
Cloud-native systems (AWS/GCP/Azure)
Kubernetes, Docker, observability tools
Experience in fintech or high-traffic systems

Rates (B2B)

120–160 PLN / hour

Recruitment Process

Intro call (30 min)
Senior-level technical interview
Architecture & project discussion
Offer

Tech Stack

Java: Advanced
Spring Boot: Advanced
Hibernate: Advanced
PostgreSQL: Advanced
Solid: Advanced
DDD: Advanced
REST API: Advanced

Senior Java Developer

SILK Software House