---
title: 'Security Engineer, Mid at ARQ'
canonical: 'https://feeny.ai/job/security-engineer-mid-arq-sao-paulo-7j2xyvshyt5b'
type: 'job'
last_seen: '2026-09-11'
---

# Security Engineer, Mid at ARQ

- **Company:** ARQ
- **Location:** São Paulo, Brazil
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-09-01
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.ashbyhq.com/arq/8186c2db-1af2-4e03-925e-69d8ada2adf1

## Job description

## What We're Looking For

You'll be ARQ's first Security Engineer based in Brazil – it's the chance to lay the foundation for how we do security in the region and shape how that function grows from here. You'll work closely with our global security team but have real autonomy in deciding what "good" looks like locally, from day one. We're looking for someone who enjoys a multidisciplinary role. Security at ARQ spans Application Security, Security Operations, and Governance/Risk/Compliance, and we need someone comfortable moving across at least two of these three areas – because in a founding role, there's no one else to hand off the parts that don't fit your specialty.

## What you'll do

- Support application security work: threat modelling sessions, secure code review, API security testing, and CI/CD pipeline checks
- Help review and monitor AI/agentic workflows for prompt risks, unsafe automated actions, and data exposure
- Build and maintain SIEM detection rules, alert pipelines, and response playbooks (Datadog SIEM, CrowdStrike, Cloudflare), owning detection coverage for a defined set of systems end-to-end
- Support incident response: triage alerts, execute IR playbooks, and help run tabletop exercises
- Conduct cloud security assessments across AWS and Kubernetes environments under the guidance of senior team members
- Execute vendor security assessments using the established due diligence framework, owning the review process for a portion of the vendor pipeline

## What you'll need

- 2–4 years in information security or a closely related technical role (security operations, cloud/infra engineering with a security focus, or similar)
- Working experience with at least one cloud environment (AWS preferred) and familiarity with Kubernetes fundamentals
- Basic familiarity with application security concepts: threat modelling, secure code review, or API security testing
- Curiosity about AI/agentic tooling risks (LLM integrations, MCP servers, automated workflows) – prior hands-on experience is a plus, not required
- Exposure to SIEM platforms and an interest in detection engineering – you've written or tuned at least a few detection rules
- Strong written and verbal communication in English

## 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

## About ARQ

## Company Overview
- **One-liner**: ARQ (formerly DolarApp) is a global fintech platform that provides multi-currency accounts, real-time currency conversion, and investment access to US stocks and ETFs for individuals across the Americas.
- **Entity Type**: Private (funding stage not disclosed; raised tens of millions from top-tier investors)
- **Headquarters**: Not publicly available (serves the Americas; localized sites for Argentina and Mexico)
- **Founded**: 2021
- **Founders**: Not publicly available

## Core Business
- **Primary industry**: Fintech – cross‑border banking, payments, wealth management
- **Target customers**: B2C – travelers, investors, professionals, and global citizens in Latin America and beyond
- **Mission**: “Modern finance for the global era” – to give customers control over their money with faster, cheaper, and more transparent financial rails.

## Products & Services
- **ARQ Multi‑Currency Account**: A digital account supporting USD, EUR, and local currencies (e.g., Argentine peso, Mexican peso). Users can convert between currencies at real market rates with no hidden fees.
- **ARQ Debit Card**: A Mastercard (inferred) for spending at leading conversion rates with zero commission or hidden charges.
- **ARQ Investments**: Access to US stocks and ETFs directly from the ARQ account, enabling long‑term wealth building.
- **Payment Rails**: US and European local account details to receive and send payments globally.

## Market Standing
- **Valuation**: Not publicly available
- **Key Metric (Private)**: Total funding – “tens of millions of dollars” from renowned investors; 2 million users as of 2026-07-01
- **Notable Investors**: Sequoia Capital, Founders Fund, Brevan Howard Digital, Y Combinator, Kaszek Ventures
- **Growth Signals**: Rebranded from DolarApp to ARQ in 2024 (per Sequoia partnership date); rapid user growth (2M people); expansion across the Americas; product diversification into investing.

## Competitive Advantages
- **Transparent pricing**: Real market conversion rates, no hidden fees – a stark contrast to traditional banks
- **Global accounts**: Users get US and EU bank details and a debit card usable worldwide
- **World‑class backing**: Sequoia, Founders Fund, YC, etc. provide credibility and strategic support
- **Elite team**: Small, high‑caliber team with experience at Revolut, Uber, Amazon, Block, and UBS, enabling fast execution
- **Vertical integration**: Combining payments, currency exchange, and investing in one app

## Strategic Focus
- **Build the financial system of the next century** – replace legacy banking middleware with direct, customer‑owned rails
- **Scale across the Americas** – starting in Argentina and Mexico, then expanding to other markets
- **Deepen wealth management** – add more asset classes and long‑term savings tools
- **Maintain a lean, high‑impact team** – “small teams with the best talent outcompete massive companies”

## Why Work Here
- **Culture**: “Long‑term ambition and absolute conviction”; “nimble, but ambitious” – the careers page describes a mission‑driven, execution‑focused environment
- **Team & autonomy**: Small teams own meaningful product areas; high ownership and rapid iteration
- **Remote/office**: Not explicitly stated, but likely hybrid or remote‑friendly given the global nature of the business
- **Notable**: Founders and early employees have built profitable products at iconic companies; strong emphasis on “world‑class in everything we do”
- **Perks**: Not publicly disclosed, but likely competitive compensation and equity in a high‑growth fintech

## Sources
1. [arqfinance.com](https://www.arqfinance.com/en-AR)
2. [jobs.ashbyhq.com/arq](https://jobs.ashbyhq.com/arq)
3. [sequoiacap.com/companies/arq/](https://sequoiacap.com/companies/arq/)
4. [arqfinance.com/en-AR/careers](https://www.arqfinance.com/en-AR/careers)

## Other roles at ARQ

- [Software Engineer  (Java Backend)](https://feeny.ai/job/software-engineer-java-backend-arq-london-bmt60t4d1p8t) — London, United Kingdom
- [Senior Product Manager](https://feeny.ai/job/senior-product-manager-arq-new-york-07fhk3paddmr) — New York, NY
- [Special Projects Lead](https://feeny.ai/job/special-projects-lead-arq-london-0ywdr6cnzpe3) — London, United Kingdom
- [Strategy and Operations Manager](https://feeny.ai/job/strategy-and-operations-manager-arq-mexico-city-4zcqzadcy6pj) — Mexico City, Mexico
- [Lead Software Engineer (Java)](https://feeny.ai/job/lead-software-engineer-java-arq-krakow-t0sa817hvase) — Krakow, Poland
- [Lead Software Engineer(Java)](https://feeny.ai/job/lead-software-engineer-java-arq-london-yc1zr9yxskgv) — London, United Kingdom
- [Software Engineer (Java)](https://feeny.ai/job/software-engineer-java-arq-krakow-1mcqnbtw9ern) — Krakow, Poland
- [Software Engineer  (Java)](https://feeny.ai/job/software-engineer-java-arq-london-tbf28z19j0aa) — London, United Kingdom
- [Senior Software Engineer (Java)](https://feeny.ai/job/senior-software-engineer-java-arq-krakow-mfhxkjpzn9ee) — Krakow, Poland
- [Senior Software Engineer  (Java)](https://feeny.ai/job/senior-software-engineer-java-arq-london-31bpdeqre2xc) — London, United Kingdom