Senior Software Engineer (Java)

ARQ
Krakow, Poland
Hybrid

Who this role is best for

Aimed at mid-to-high-level Java developers who thrive in fast-growing fintech environments and are comfortable with greenfield projects and microservices.

Best fit for

  • Individuals experienced in greenfield development and system evolution
    — “The work will focus on greenfield development and improvement of existing systems”
  • Professionals fluent in English with a results-driven mindset and communication skills
    — “Quick learner with an ambitious and results driven personality, with excellent communication skills (english fluency, verbal and written)”

Things to consider

  • Office presence is required for 3-4 days a week in Krakow
    — “Office Policy: 3-4 days a week in-office”
  • Candidates must have a bachelor's degree or higher in a relevant field
    — “Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering / Science disciplines”

How to stand out

  • Highlight experience with microservices and REST APIs in your resume and interview responses
    — “Projects will include building REST APIs, engineering microservices”
  • Emphasize your background in clean code and your familiarity with TDD and DDD practices
    — “pragmatic approach to develop our business logic, focusing on clean code, with emphasis on maintainability and fast turnaround with TDD, DDD and continuous integration & delivery”
  • Showcase your ability to work on large-scale systems in high-growth environments
    — “Track record of building complex products that millions of people use in hypergrowth startups”
Pace · SteadyCollaboration · HighAutonomy · MediumDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • Developed scalable, secure, and high-performing backend systems
  • Built REST APIs and microservices
Typical background
Bachelor's Degree in Computer Science, Mathematics, Physics, or other Engineering / Science disciplinesExperience in Backend development

Skills & requirements

Required

JavaSpring BootPostgreSQLREST ApisMicroservicesClean CodeTDDDDDContinuous Integration & Delivery

Preferred

Experience With Card PaymentsTreasury ManagementTransactions BookingCrypto Liquidity

Stack & domain

JavaREST ApisMicroservicesSpring BootPostgreSQLTDDDDDContinuous Integration & DeliveryCommunicationFintechCard PaymentsTreasury ManagementTransactions BookingCrypto Liquidity

About the role

Original posting from ARQ via Ashby

ABOUT ARQ

ARQ is one of the fastest-growing fintechs in the world. Our mission is to redefine how people interact with money across borders, building the infrastructure to move value seamlessly. We’re still early in our journey, which means every person who joins shapes the future of our product, culture, and growth. If you’re excited by big challenges, global impact, and the chance to grow fast with a world-class team, ARQ is the place to do it.

WHAT WE'RE LOOKING FOR

As a Backend Engineer, you’ll design, develop, and maintain scalable, secure, and high-performing backend systems that power our innovative products. You’ll collaborate with a talented team to create solutions that drive financial inclusion and transform the way people manage their money.

WHAT YOU'LL BE DOING

  • The work will focus on greenfield development and improvement of existing systems
  • Projects will include building REST APIs, engineering microservices and evolving a number of systems that our business depends on (e.g. card payments, treasury management, transactions booking, crypto liquidity)
  • Our technology stack is based predominantly on Java 25 on the backend with Postgres database
  • We rely on Spring Boot for quick and quality delivery
  • We have a pragmatic approach to develop our business logic, focusing on clean code, with emphasis on maintainability and fast turnaround with TDD, DDD and continuous integration & delivery

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

BENEFITS

  • 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

Source: ARQ careers (Ashby)

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