Lead Software Engineer(Java)

Arq; Greater London; On-site; GBP 70,000 - 120,000; Full time

Benefits offered by this job

Competitive salary and benefits

Stock options

Discretionary performance bonus

The latest tools and technology

World-class team

Opportunity to help build fintech app

Office Policy: 3-4 days a week in‑the‑

Job summary

ARQ is seeking a Backend Engineer to design, develop, and maintain scalable backend systems powering our fintech products. You will work with a skilled team to deliver secure, high-performance services and REST APIs, focusing on maintainability and rapid delivery.

The role emphasizes Java on the backend, Spring Boot, and a Postgres stack. You will contribute to greenfield work and the evolution of critical business systems in a fast-growing environment.

Qualifications

• Bachelor's degree in a technical field.
• Proven experience in backend development with Java.
• Excellent communication skills in English (spoken and written).

Responsibilities

• Greenfield development and improvement of existing systems.
• Build REST APIs and engineering microservices; evolve critical systems like payments, treasury, and transactions.

Skills

Java

Backend development

English fluency

Education

Bachelor's Degree in CS/Math/Physics or related

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