Senior Software Engineer - Java
About the job
- Demonstrable experience in backend development with fluency in Java.
- A Bachelor's Degree or above in Computer Science, Mathematics, Physics, or another Engineering or Science discipline.
- English fluency, both verbal and written.
- A track record of building complex products used by millions of people in hypergrowth startups.
- Focus on greenfield development and improvement of existing systems.
- Build REST APIs and engineer microservices.
- Evolve systems supporting card payments, treasury management, transaction booking, and crypto liquidity.
- Develop scalable, secure, and high-performing backend systems.
- Apply test-driven development, domain-driven design, clean code, maintainability, and continuous integration and delivery practices.
About the company
ARQ is a fintech app that makes currency exchange and US-related transfers cheaper and simpler. It lets users swap local currencies for US dollars at competitive rates without traditional exchange houses, and it offers digital dollar investments. Transfers to and from the US cost a flat $3, lower than banks, and SPEI transfers from Mexico convert to digital dollars inside the app. Its goal is to reduce costs and complexity of moving money with the US and provide easy access to digital-dollar investments.
Company Size
201-500
Company Stage
Early VC
Total Funding
$75.1M
Headquarters
Mexico City, Mexico
Founded
2021
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Simplify's Take
What believers are saying
- ARQ raised US$70 million in March 2026 from Sequoia, Founders Fund, and Kaszek.
- By September 2026, its app advertised two million users and updated product releases.
- Brazil's September 2026 rollout expands distribution inside the region's largest premium market.
What critics are saying
- ARQ admits it is not a bank, so balances lack deposit insurance.
- Wise, Revolut, and Nomad attack ARQ's pricing advantage across Brazil and Latin America.
- If partners or regulators restrict stablecoin rails, ARQ's cross-border model breaks.
What makes ARQ unique
- ARQ's March 2026 rebrand unifies digital dollars, euros, payments, cards, investing, and credit.
- It targets mass-affluent, globally mobile LatAm users ignored by Nubank and banks.
- Its 2026 app still highlights real-market rates and the Prestige card.
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Benefits
Stock Options
Discretionary performance bonus
Growth & Insights and Company News
6 month growth
↓ -40%1 year growth
↑ 0%2 year growth
↓ -2%Mexican fintech ARQ, formerly DolarApp, is accelerating its Brazilian expansion following a US$70 million funding round led by Sequoia Capital. The company targets high-income Brazilians who move money internationally, offering global accounts, foreign exchange, and cross-border payments. Unlike Nubank, Sequoia's first Brazilian investment in 2013, which focused on middle- and low-income consumers, ARQ serves a niche market. Operating in Mexico, Argentina, and Colombia, ARQ entered Brazil in 2025, competing with Revolut, Wise, and Nomad. The fintech plans to invest primarily in product development rather than marketing, employing fewer than 200 staff across four countries. ARQ sees credit cards as its biggest growth opportunity, aiming to reduce financing costs by allowing customers to leverage interest rate differentials between markets. The investment marks Sequoia's return to Brazil after seven years, with the firm exploring further fintech opportunities.
DollarApp raises $70M from sequoia and founders fund. Dollar App is a dollar USDc account where users can receive, send, and pay in pesos or dollars. Through DolarApp, users can also save in USDc and pay with a global Mastercard that offers up to 4% cash back. With the funds, the fintech will transition its brand from DolarApp to ARQ. ARQ will integrate services including the buying and management of digital dollars and euros, cross-border payments, international cards for travel and online purchases, digital-dollar investment tools, and credit products. ARQ reports more than 2 million users across Latin America and over $10B in annualized transaction volume. ARQ also employs more than 100 people across New York, Buenos Aires, São Paulo, Kraków, Mexico City, Bogotá, and London.
DolarApp, a global financial services platform, has raised $70 million in a funding round led by Sequoia Capital, Founders Fund and Kaszek. The company is rebranding as ARQ and expanding beyond international money transfers to become a comprehensive daily finance management tool. Founded in Mexico in 2022, the company operates in Argentina, Colombia and Brazil, offering digital dollar and euro accounts via mobile. It has surpassed $10 billion in annualised transaction volume and serves over two million clients globally. ARQ targets high-income professionals and globally mobile users, positioning itself as an alternative to traditional banking. The platform now includes investment options and a Prestige credit card, aiming to manage everyday finances alongside international payments and cryptocurrency transactions.
Venture capital firms Sequoia Capital and Founders Fund are investing in Latin American financial app ARQ via a $70 million raise, ARQ said.
Paymentology, the leading global issuer-processor, today announces its partnership with DolarApp, the Mexican startup which provides digital dollar accounts to consumers across Latin America.Established in 2021, DolarApp has emerged as a pioneering force in Latin America by introducing its USD-denominated credit card. The card grants consumers the ability to send and receive transfers from multiple countries, dollarise their financial transactions with digital dollars and pay with an international card issued by Mastercard in any currency at the best rates – both when they travel and everyday expenses. DolarApp is the first provider in Mexico to offer this service with no foreign exchange (FX) fees and transparent market rates, opening doors for millions of Mexican travelers to spend freely and economically, at the best rates with full transparency.Paymentology plays a vital role in providing DolarApp with a fast and scalable card payment program, along with first-class tokenization and security services. The services enabled through Paymentology encompasses virtual & physical Mastercard card processing, 3DSecure technology, Apple Pay, and Google Pay.As a result of this partnership, DolarApp is proudly the pioneering organization in Mexico, offering the convenience of both Google Pay and Apple Pay to its customers. This collaboration has revolutionised payment options, ensuring a seamless and secure experience for users in the country, and when travelling, while providing a reliable platform that supports DolarApp’s growth and expansion plans.Alvaro Correa, Co-Founder & COO at DolarApp commented: “We are delighted to collaborate with Paymentology as our strategic partner for card issuing and processing in Mexico. Their exceptional expertise and track record in the industry, coupled with their ability to provide tailor-made and agile payment solutions, perfectly align with DolarApp’s vision and requirements