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ARQ

Senior Software Engineer, Java

ARQ

. Design, develop, and maintain scalable, secure, and high-performing backend systems .

Posted 10/26/2026full-timeKrakow • PolandSeniorWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Proficient in Backend Development with a strong focus on Java, REST APIs, and microservices. Demonstrates the ability to design and maintain scalable systems while collaborating effectively in a team-oriented environment.

Highest-signal resume keywords
Backend DevelopmentJavaREST APIsMicroservicesSpring Boot

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Backend DevelopmentJavaREST APIsMicroservicesPostgresSpring BootTDDDDDContinuous IntegrationContinuous Delivery
Soft Skills
Excellent Communication SkillsQuick LearnerAmbitiousResults Driven
Certifications & Qualifications
Bachelor's Degree in Computer ScienceBachelor's Degree in MathematicsBachelor's Degree in PhysicsBachelor's Degree in Engineering
Industry Keywords
Financial InclusionFinancial ProductsCard PaymentsTreasury ManagementTransaction BookingCrypto Liquidity

Tech Stack

Tools & technologies
JavaMicroservicesPostgresSpringSpring BootSpringBoot

About the role

Key responsibilities & impact
  • Design, develop, and maintain scalable, secure, and high-performing backend systems
  • Focus on greenfield development and improvement of existing systems
  • Build REST APIs and engineer microservices
  • Evolve systems supporting card payments, treasury management, transaction booking, and crypto liquidity
  • Develop business logic using clean, maintainable code
  • Collaborate with a talented team to create solutions supporting financial inclusion and financial products

Requirements

What you’ll need
  • Demonstrable experience in Backend development, with fluency in Java
  • Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering / Science disciplines
  • Quick learner with an ambitious and results driven personality, with excellent communication skills
  • English fluency, verbal and written
  • Track record of building complex products that millions of people use in hypergrowth startups
  • Experience with Java 25, Postgres, Spring Boot, REST APIs, microservices, TDD, DDD, and continuous integration and delivery

Benefits

Comp & perks
  • 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