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Lead Software Engineer(Java)

ARQ - London, United Kingdom - Hybrid - posted 2026-10-05

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ARQ is a fast-growing fintech redefining cross-border money movement and building infrastructure for seamless value transfer. As a Backend Engineer, you will design, develop, and maintain scalable, secure, and high-performing backend systems powering innovative financial products. You'll collaborate with a talented team to create solutions that drive financial inclusion and transform how people manage their money globally. The role focuses on greenfield development and improvement of existing systems, including building REST APIs, engineering microservices, and evolving critical business systems such as card payments, treasury management, transactions booking, and crypto liquidity. The technology stack is predominantly Java 25 on the backend with Postgres databases. The team uses Spring Boot for rapid, quality delivery and follows a pragmatic approach emphasizing clean code, maintainability, and fast turnaround through TDD, DDD, and continuous integration & delivery practices. You'll have the opportunity to shape the future of the product, culture, and growth at an early-stage, high-impact fintech with global ambitions. REQUIREMENTS: - 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 ambitious, results-driven personality and excellent communication skills (English fluency, verbal and written) - Track record of building complex products used by millions in hypergrowth startups

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