Software Engineer (Java)

ARQ; Greater London; On-site; GBP 75,000 - 110,000; Full time

Benefits offered by this job

Stock options

Discretionary performance bonus

Latest tools and technology

World-class team

Job summary

ARQ is seeking a Backend Engineer to design, develop, and maintain scalable backend services powering our fintech products. You will build RESTful APIs and microservices, focusing on reliability, security, and performance.

The role emphasizes clean code, maintainability, and fast delivery with TDD, DDD, and CI/CD. A strong, collaborative team environment and opportunities to impact our financial infrastructure are available.

Qualifications

• Bachelor's degree in CS/engineering or equivalent.
• Fluent in English with excellent communication.
• Proven experience building back-end systems at scale.
• Experience with Java, Spring Boot, REST APIs, and microservices.

Responsibilities

• Design, develop, and maintain scalable backend systems.
• Build REST APIs and microservices to power products.
• Collaborate with frontend, product, and infra teams to deliver high-quality software.
• Follow TDD/DDD and CI/CD practices to ensure rapid, reliable delivery.

Skills

Java

Backend development

REST APIs

Microservices

TDD

DDD

CI/CD

Communication

English fluency

Education

Bachelor's Degree in Computer Science

Tools

Spring Boot

PostgreSQL

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 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