Senior Software Engineer (Java)

ARQ; United Kingdom; Hybrid; GBP 60,000 - 90,000; Full time

Benefits offered by this job

Competitive salary

Stock options

Discretionary performance bonus

Latest tools and technology

World-class team

Job summary

ARQ is expanding its backend platform and seeks a Backend Engineer to design, develop, and maintain scalable systems powering cross-border fintech services. You will build REST APIs and microservices using Java, Spring Boot, and Postgres, with a focus on clean code and rapid delivery.

You will work in a hybrid setup, 3–4 days in the office, collaborating with a world-class team to drive financial inclusion and growth.

Qualifications

• Proven backend development experience with Java.
• Bachelor's degree in CS, math, physics or engineering.
• Fluent English communication and fast learner with results-driven attitude.

Responsibilities

• Design, develop and maintain scalable backend systems.
• Build REST APIs and microservices powering our products.
• Collaborate with the team to ensure maintainable code and CI/CD practices.

Skills

Java

Backend development

REST APIs

Microservices

TDD

DDD

Education

Bachelor's Degree in Computer Science

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 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