Lead Software Engineer (Java)

ARQ
Krakow, Poland
Hybrid

Who this role is best for

Backend developers with Java expertise and experience in hypergrowth startups will find this role in fintech with a focus on greenfield development and microservices architecture.

Best fit for

  • Candidates with Java fluency and a background in building scalable systems for hypergrowth startups
    — “Track record of building complex products that millions of people use in hypergrowth startups”
  • Individuals who thrive in a collaborative, world-class team environment focused on clean code and maintainability
    — “We rely on Spring Boot for quick and quality delivery”
  • Professionals with a strong foundation in engineering or science disciplines and a passion for financial inclusion
    — “Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering / Science disciplines”

Things to consider

  • The role requires on-site presence for 3-4 days a week, which may limit remote flexibility
    — “Office Policy: 3-4 days a week in-office”
  • Candidates must be fluent in English, both verbally and in writing, for effective communication
    — “excellent communication skills (english fluency, verbal and written)”

How to stand out

  • Emphasize experience with microservices and REST APIs in your resume and interview responses
    — “Projects will include building REST APIs, engineering microservices”
  • Showcase your achievements in high-impact, complex systems used by millions of users
    — “Track record of building complex products that millions of people use”
Pace · Fast PacedCollaboration · HighAutonomy · MediumDecision Impact · Team

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

What success looks like

  • high-performing backend systems
  • scalable solutions
  • financial inclusion
Typical background
computer science degreebackend development experience

Skills & requirements

Required

JavaSpring BootREST ApisMicroservicesPostgreSQL

Preferred

DDDTDDContinuous Integration

Stack & domain

JavaSpring BootPostgreSQLFintech

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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