Java Backend Engineer: Fintech for Global Impact

ARQ; Kraków; On-site; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Competitive salary

Latest technology

Strong team support

Job summary

ARQ is seeking a Backend Engineer to design, develop, and maintain scalable, secure backend systems powering our fintech products in Kraków. You will build REST APIs and microservices using Java 25 and PostgreSQL, with Spring Boot driving fast, quality delivery.

Join a team that values maintainable code, TDD, and a pragmatic approach to business logic. This role offers a hands-on opportunity to shape products used by millions while growing with a fast-growing fintech.

Qualifications

• Fluency in English (verbal and written) and strong communication skills.
• Bachelor's Degree or above in CS, Math, Physics, or related field.
• Demonstrable experience in backend development with Java."
• Track record of building complex products used in hypergrowth environments.

Responsibilities

• Greenfield development and improvement of existing systems.
• Build REST APIs and engineering microservices for multiple business-critical systems.
• Evolve systems such as payments, treasury, and transactions booking.
• Work with Spring Boot, Postgres, and test-driven development practices.

Skills

Java

Backend development

English communication

Hypergrowth experience

Education

Bachelor's degree in CS or related field

Tools

Spring Boot

PostgreSQL

REST APIs

Microservices

Job description

ARQ is seeking a Backend Engineer to design, develop, and maintain scalable, secure backend systems powering our fintech products in Kraków. You will build REST APIs and microservices using Java 25 and PostgreSQL, with Spring Boot driving fast, quality delivery.

Join a team that values maintainable code, TDD, and a pragmatic approach to business logic. This role offers a hands-on opportunity to shape products used by millions while growing with a fast-growing fintech.