Oscilar
Sr./Staff Backend Engineer - Java (Poland)
Remote - Poland. Posted 7 months ago
The role
You will own critical parts of the platform used by banks and fintechs to make real-time fraud, credit, and compliance decisions. You will build and scale Java services and work on real-time streaming and data systems.
What you will do
- Own features end to end from design to production
- Build and scale Java services at the core of the decisioning platform
- Work on real-time streaming and data systems
- Build reliable processes with workflow orchestration
- Propose architecture, weigh trade-offs, and write design docs
- Work with product, frontend, and customer-facing teams
- Own production including monitoring, performance tuning, and fixing root causes
- Raise the engineering bar through code reviews and knowledge sharing
Required qualifications
- 5+ years of backend development
- Deep expertise in Java and its ecosystem
- Track record of taking work from initial concept to production
- Experience building and operating low-latency, high-scale distributed systems in production
- Hands-on experience with AWS, microservices, and containers (Docker, Kubernetes)
- Experience with event streaming and data systems such as Kafka, ClickHouse, PostgreSQL, and Redis
- Good understanding of API design and security best practices
- Strong written and verbal communication skills
Nice to have
- Experience with Flink, Temporal, or Databricks
- Experience in fintech, fraud prevention, risk, or payments
- A degree in Computer Science, Software Engineering, or a related field
- Experience using AI coding agents (e.g. Claude Code) in day-to-day development
Benefits
- Competitive salary paid in USD
- Remote-first culture
- Family-friendly environment
- Regular team events and offsites
- Learning and professional development opportunities
- Latest MacBook, or a Linux machine
- Contractors may take time off with advance notice
About the company
Oscilar is building an AI Risk Decisioning Platform used by banks, fintechs, and digitally native organizations to manage fraud, credit, and compliance risk.