Lead Software Engineer(Java)

ARQ
London, United Kingdom
Hybrid

Who this role is best for

Aimed at mid-to-senior Java backend engineers who thrive in greenfield development and fintech innovation.

Best fit for

  • Candidates with experience in building complex financial systems using Java and microservices architecture
    — “building REST APIs, engineering microservices and evolving a number of systems that our business depends on”
  • Individuals with a strong academic background in engineering or science disciplines and a track record in hypergrowth startups
    — “Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering / Science disciplines”
  • Candidates who are fluent in Java and have a pragmatic approach to development with a focus on maintainability and fast delivery
    — “pragmatic approach to develop our business logic, focusing on clean code, with emphasis on maintainability and fast turnaround”

Things to consider

  • The role requires in-office presence for 3-4 days a week, which may not suit remote-preference candidates
    — “Office Policy: 3-4 days a week in-office”

How to stand out

  • Emphasize your experience with TDD and DDD in your resume and interview responses
    — “pragmatic approach to develop our business logic, focusing on clean code, with emphasis on maintainability and fast turnaround with TDD, DDD”
  • Highlight your track record of building products used by millions in hypergrowth environments
    — “Track record of building complex products that millions of people use in hypergrowth startups”
  • Showcase your ability to work on greenfield projects and improve existing systems
    — “The work will focus on greenfield development and improvement of existing systems”
Pace · Fast PacedCollaboration · HighAutonomy · HighDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • Experience in building complex products used by millions of people in hypergrowth startups
Typical background
Bachelor's Degree in Computer Science, Mathematics, Physics, or other Engineering / Science disciplines

Skills & requirements

Required

JavaBackend DevelopmentSpring BootREST ApisMicroservicesClean CodeTDDDDDContinuous Integration & Delivery

Preferred

Postgres Database

Stack & domain

JavaBackend DevelopmentREST ApisMicroservicesPostgres DatabaseSpring BootClean CodeTDDDDDContinuous Integration & DeliveryCommunicationFintech

About the role

Original posting from ARQ via Ashby

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

Source: ARQ careers (Ashby)

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