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Senior Software Engineer (Java)

Software Engineer • Senior • Hybrid • Full-time Poland Krakow, Poland

ARQ, one of the fastest-growing fintechs in the world, is looking for a Backend Engineer to design, develop and maintain scalable, secure and high-performing backend systems. The work involves Java 25 and Postgres-based greenfield development and evolving systems the business depends on, such as card payments, treasury management, transactions booking and crypto liquidity, using Spring Boot, TDD, DDD and continuous integration.

Responsibilities

  • Design, develop and maintain scalable, secure and high-performing backend systems
  • Work on greenfield development and improvement of existing systems
  • Build REST APIs and engineer microservices
  • Evolve systems the business depends on, such as card payments, treasury management, transactions booking and crypto liquidity
  • Use Java as the primary backend language with a Postgres database
  • Use Spring Boot for quick and quality delivery
  • Apply TDD, DDD and continuous integration & delivery with a focus on clean, maintainable code

Requirements

  • Demonstrable backend development experience with fluency in Java
  • Bachelor's degree (or above) in Computer Science, Mathematics, Physics or another Engineering/Science discipline
  • Quick learner with an ambitious, results-driven personality
  • Excellent communication skills, fluent English (verbal and written)
  • Track record of building complex products used by millions of people in hypergrowth startups

Soft skills

ambitious and results-drivenquick learnerexcellent communication skillsownership mindsetcollaborative team player

What we offer

  • Competitive salary and benefits
  • Stock options, so you own part of what you build
  • Discretionary performance bonus
  • The latest tools and technology
  • A world-class team that will challenge and grow your skills
  • The opportunity to help build the best fintech app in Latin America
  • Office policy: 3-4 days a week in-office

About the company

ARQ is one of the fastest-growing fintechs in the world, building the infrastructure to move value seamlessly across borders. The company is still early in its journey, so every new team member helps shape its product, culture and growth.

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