Senior Software Engineer (Java)

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

Benefits offered by this job

Competitive salary

Stock options

Discretionary bonus

Latest tools and technology

World-class team

In-office 3-4 days/week

Job summary

ARQ, a fast-growing fintech in London, is looking for a Backend Engineer to design, develop and maintain scalable, secure backend systems powering cross-border money movement.

You will build REST APIs and microservices in Java/Spring Boot, contribute to greenfield projects, and work with Postgres, Docker, and CI/CD to ship robust features with quality and speed.

Office policy requires 3–4 days in-office; you’ll join a world-class team and have stock options and a discretionary bonus.

Qualifications

• Bachelor's degree in CS, Math, Physics or Engineering.
• Fluent English communication, verbal and written.
• Track record of building products used by millions in hypergrowth startups.

Responsibilities

• Design, develop and maintain scalable backend systems.
• Implement REST APIs and microservices.
• Collaborate with cross-functional teams to ship features.
• Follow TDD, DDD and CI/CD for quality and speed.

Skills

Java

Backend development

REST APIs

Spring Boot

Microservices

TDD / CI/CD

English communication

Education

Bachelor's Degree (CS/Math/Physics/Engineering)

Tools

PostgreSQL

Docker

Kubernetes

CI/CD

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 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