Software Engineer (Java Backend)

ARQ; Greater London; On-site; GBP 80,000 - 110,000; Full time

Benefits offered by this job

Sign-on stock options

Discretionary performance bonus (stock

Paid annual leave

Latest technology to work with

Job summary

ARQ is a fast-growing fintech redefining cross-border money interactions. We are seeking a Backend Engineer to design, develop, and maintain scalable backend systems powering our innovative products.

You will collaborate with a talented team to enable financial inclusion and transform how people manage their money. The role focuses on greenfield development, building REST APIs, microservices, and evolving core systems with Java and Postgres, using Spring Boot and TDD/CI/CD to ensure quality and

Qualifications

• Experience in backend development with fluency in Java.
• Bachelor's degree in CS/Engineering or equivalent.
• Excellent communication skills in English (verbal and written).
• Track record of building complex products used by users in fast‑growing environments.

Responsibilities

• Design, develop, and maintain scalable backend systems.
• Build REST APIs and microservices for core products.
• Collaborate with cross‑functional teams to improve infrastructure.
• Follow TDD, DDD, and CI/CD practices for reliable delivery.

Skills

Java

Backend development

English fluency

Team collaboration

Education

Bachelor's Degree in CS/Engineering

Tools

Spring Boot

PostgreSQL

REST APIs

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.

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