Lead Software Engineer (Java)

Castle Island; New York (NY); Hybrid; USD 120,000 - 190,000; Full time

Benefits offered by this job

Stock options

Discretionary bonus

Competitive salary and benefits

Latest tools and technology

World-class team

3-4 days in-office

Job summary

ARQ is seeking a Backend Engineer to design, develop, and maintain scalable backend systems powering our fintech products. You will collaborate with a talented team to build secure, high-performance services that enable cross-border money movement.

Key responsibilities include greenfield development, REST API work, and evolving core systems like payments and treasury management using Java and Spring Boot, with a PostgreSQL backend.

Qualifications

• Fluent in backend development with Java
• Bachelor's degree (or above) in CS, Math, Physics, or related field
• Fast learner with strong communication skills (English)
• Track record building complex products used at scale in fast-growing startups

Responsibilities

• Develop greenfield features and improve existing systems
• Build REST APIs and microservices for payment, treasury, and transactions modules
• Leverage Java and Spring Boot with PostgreSQL to deliver reliable services

Skills

Java

English fluency

Education

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

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. We2 e2 re still early in our journey, which means every person who joins shapes the future of our product, culture, and growth. If you2 e2 92e 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, you2 e2 9ll design, develop, and maintain scalable, secure, and high-performing backend systems that power our innovative products. You2 e2 9ll 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