Backend Engineer - Krakow at Arq

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 - Sign-on stock options bonus, so you become part of the success of the company - Discretionary performance bonus (stock options) - Paid annual leave - Own the development process that will face on the customer's impact - Latest technology to work with - Strong team that will help you improve your skills