Software Engineer (Java Backend)

Arq; Greater London; On-site; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Sign-on stock options

Discretionary performance bonus

Paid annual leave

Latest technology to work with

Strong team that helps you grow

Job summary

ARQ is a fast-growing fintech redefining how people move money across borders. As a Backend Engineer, you will design, develop, and maintain scalable, secure backend systems powering our financial products.

You’ll work on greenfield projects and modernize existing services, using Java with Spring Boot and Postgres. A disciplined approach to code quality, testing, and continuous delivery is expected.

Qualifications

• Demonstrable backend development experience with Java.
• Bachelor’s degree in CS, math, physics or engineering/ sciences.
• Excellent written and spoken English, results-driven mindset.

Responsibilities

• Design, develop and maintain scalable backend systems.
• Build REST APIs and microservices powering core products.
• Work with Spring Boot and Postgres to deliver secure solutions.
• Follow clean code principles with TDD/CI/CD and maintainability.

Skills

Backend development

Java

Communication skills

English fluency

Hypergrowth startup experience

Education

Bachelor's Degree in Computer Science or related field

Tools

Spring Boot

PostgreSQL

REST APIs

Microservices

Job description

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