Lead Software Engineer (Java)

ARQ; New York (NY); Hybrid; USD 120,000 - 180,000; Full time

Benefits offered by this job

Stock options

Discretionary bonus

Latest tools & technology

World-class team

In-office 3-4 days/week

Job summary

ARQ is seeking a Backend Engineer to design, develop, and maintain scalable backend systems powering fintech products. You’ll collaborate with a talented team to deliver secure, high-performance services including card payments, treasury management and transactions.

You will work with Java on the backend, Spring Boot, and PostgreSQL, using TDD, DDD and CI/CD to ensure quality and rapid delivery. Strong English communication is required.

Qualifications

• Degree and strong foundation in computer science or related field.
• Proven backend development experience with Java.
• Excellent written and verbal English communication.
• Track record delivering complex products in hypergrowth startups.

Responsibilities

• Design, build and maintain scalable backend systems.
• Develop REST APIs and microservices for fintech features.
• Ensure security, reliability and high performance.
• Collaborate with cross-functional teams and QA.
• Apply TDD, DDD and CI/CD practices for fast delivery.

Skills

Backend development

Java

English communication

Education

Bachelor's degree in CS/Math/Physics/Engineering

Tools

Spring Boot

PostgreSQL

REST APIs

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