Lead Software Engineer, Java

ARQ

. Design, develop, and maintain scalable, secure, and high-performing backend systems .

Posted 10/26/2026full-timeLondon • United KingdomSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Proficient in designing and developing scalable backend systems using Java and PostgreSQL, with a strong focus on clean code practices, TDD, and DDD. Demonstrates effective collaboration and communication skills to drive innovative solutions in financial technology.

Highest-signal resume keywords

Backend DevelopmentJava 25PostgreSQLSpring BootREST API Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Backend DevelopmentJava 25PostgreSQLSpring BootREST API DevelopmentMicroservices EngineeringClean CodeTest-Driven DevelopmentDomain-Driven DesignContinuous Integration

Soft Skills

Excellent Communication SkillsQuick LearnerAmbitiousResults Driven

Certifications & Qualifications

Bachelor's Degree in Computer ScienceBachelor's Degree in MathematicsBachelor's Degree in PhysicsBachelor's Degree in Engineering

Industry Keywords

Financial InclusionMoney ManagementCard PaymentsTreasury ManagementTransactions BookingCrypto Liquidity

Tech Stack

Tools & technologies

JavaMicroservicesPostgresSpringSpring BootSpringBoot

About the role

Key responsibilities & impact

Design, develop, and maintain scalable, secure, and high-performing backend systems
Focus on greenfield development and improvement of existing systems
Build REST APIs
Engineer microservices
Evolve systems supporting card payments, treasury management, transactions booking, and crypto liquidity
Use Java 25 and PostgreSQL
Apply Spring Boot for delivery
Develop business logic with clean code, maintainability, TDD, DDD, and continuous integration and delivery
Collaborate with a talented team to create solutions that drive financial inclusion and transform money management

Requirements

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

Comp & perks

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