Senior Software Engineer (Java)

ARQ; Greater London; On-site; GBP 85,000 - 120,000; Full time

Benefits offered by this job

Stock options

Discretionary bonus

The latest tools and technology

World-class team

Office policy: 3-4 days in-office

Job summary

ARQ is hiring a Backend Engineer in the UK to design, develop and maintain scalable backend systems powering our fintech products.

You will work on greenfield development, REST APIs and microservices, evolving systems such as payments and treasury management. Our stack uses Java with Spring Boot and Postgres, with a focus on clean code, TDD, and rapid delivery. Office policy requires 3–4 days in the office.

Qualifications

• Bachelor's degree in Computer Science or related field.
• Strong backend development experience.
• Excellent communication skills in English, written and verbal.

Responsibilities

• Design, develop and maintain scalable backend systems powering fintech products.
• Build REST APIs and microservices; evolve systems like payments and treasury management.
• Focus on clean code, test-driven development (TDD) and rapid delivery using Spring Boot and Postgres.

Skills

Backend development experience

Education

Bachelor's degree in Computer Science or related field

Tools

Java

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