Senior Software Engineer Java
Posted Updated
Summary
Senior backend engineer at ARQ (formerly DolarApp) in Krakow who designs, builds, and maintains scalable Java microservices and REST APIs supporting card payments, treasury management, transaction booking, and crypto liquidity. Core stack: Java, PostgreSQL, Spring Boot, with TDD, DDD, and CI/CD practices.
You will design, develop, and maintain scalable, secure, high-performing backend systems. You will build REST APIs and microservices, improve existing systems, and support card payments, treasury management, transaction booking, and crypto liquidity. You will work with Java, PostgreSQL, Spring Boot, TDD, DDD, and continuous integration and delivery.
Responsibilities
- Develop greenfield systems and improve existing systems
- Build REST APIs and microservices
- Evolve systems supporting card payments, treasury management, transaction booking, and crypto liquidity
- Develop backend services using Java and PostgreSQL
- Apply clean code, TDD, DDD, and continuous integration and delivery practices
Requirements
- Demonstrable backend development experience with fluency in Java
- Bachelor's degree or above in Computer Science, Mathematics, Physics, or another Engineering or Science discipline
- Excellent written and verbal English communication skills
- Track record of building complex products used by millions of people in hypergrowth startups
Benefits
- Stock options
- Discretionary performance bonus
- Latest tools and technology
