Senior Auth Engineer — Users & Auth

Ready to accelerate your career?

Clara is the fastest-growing company in Latin America. We've built the leading solution for companies to make and manage all their payments. We already help over 20,000 large and growing businesses operate with agility and financial clarity through locally issued corporate cards, bill pay, financing, and a powerful B2B platform built for scale.

Clara is backed by some of the most successful investors in the world, including top regional VCs like monashees, Kaszek, and Canary, and leading global funds like Notable Capital, Coatue, DST Global Partners, ICONIQ Growth, General Catalyst, Citi Ventures, SV Angel, Citius, Endeavor Catalyst, and Goldman Sachs - in addition to dozens of angel investors and local family offices. 

We’re building the financial infrastructure that powers high-performing organizations across the region. We invite you to join us if you want to be part of a fast-paced environment that will accelerate your career and support you to do some of the best work of your life alongside a passionate and committed team distributed across the Americas.

Auth Engineer — Users & Auth

We're looking for an Auth Engineer to own, architect, and build the systems that define how users exist and move within Clara's platform — authentication, authorization, identity, and access control. This is one of those roles where the work is invisible when it's done right and critical when it's not. The scope is deep and end-to-end: architecting the identity layer, designing auth flows, managing the user lifecycle, integrating Auth0 with Clara's platform, and making sure the frontend and backend sides of identity speak the same language. You'll be the person the rest of engineering turns to when there's an auth question no one else can answer. Security isn't a checklist here — it's a first-class concern baked into how we build.

We move fast and trust our engineers to own outcomes end-to-end. That means autonomy to make decisions, proactivity to surface problems before they become blockers, and the attitude to push initiatives across the finish line without waiting to be told what to do.

Your responsibilities will include:

• Designing and building the identity and access layer that Clara's apps rely on across products — making it work end-to-end and hold up as the platform grows, in close partnership with the team's tech lead
• Owning auth end-to-end: architecture, implementation, and Auth0 integration across frontend and backend
• Designing and hardening auth flows and the full user lifecycle
• Being a strong reference on identity and access for the rest of engineering — a go-to for the hard auth problems that block other teams
• Setting and holding the security and quality bar on identity-critical paths through code reviews and design reviews
• Partnering with the team's tech lead and with product on the feasibility of auth-heavy initiatives, and spotting where AI tooling can close work that would otherwise take months

Who you are

• 4+ years of software engineering experience with solid execution in production environments
• 2+ years of hands-on experience implementing authentication and authorization on a modern identity platform — experience with Auth0 specifically is preferred, comparable platforms is also welcome; IAM depth is a strong plus
• Full-stack engineering with your strength on the backend. We work primarily in Java and Spring on the backend and React on the frontend — depth in those is a plus, but we care more about strong fundamentals and how fast you ramp than about years in any one stack
• Deep understanding of security best practices for web applications and secure software design in distributed architectures
• High autonomy, proactivity, and ownership mindset. You don't wait for direction — you spot what needs to happen and drive it
• A genuine pull toward AI. You don't need to be an expert, but you're actively experimenting with AI tools in your day-to-day work, keep up with where the space is going, and are eager to apply it to how we build. At Clara, AI is part of how we work, not a side topic
• English proficiency, comfortable communicating and collaborating on technical topics across geographies

We've kept this list short on purpose — these are the things that actually matter. If you check most of these and the rest you'd close with curiosity and the right tools, we want to hear from you.

Why join Clara

At Clara, you’ll have the autonomy, speed, and support to make meaningful impact — not just on your team, but on how organizations are run across Latin America.

Who we are

• We’re the leading B2B fintech for spend management in Latin America.

• Certified as one of the world's fastest-growing companies, a Great Place to Work, and a LinkedIn Top Startup.

• Passionate about making Latin America more prosperous and competitive.

• Constantly innovating to build financial infrastructure that enables each of our customers to thrive.

• Product-led, high-talent-density culture — designed for builders who raise the bar.

• Proud of our open, inclusive, and values-driven environment.

What we believe in

• #Clarity. We say things clearly, directly, and proactively.

• #Simplicity. We reduce noise to focus on what really matters.

• #Ownership. We take responsibility and never wait to be told.

• #Pride. We build products and experiences we’re proud of.

• #Always Be Changing (ABC). We grow through feedback, risk-taking, and action.

• #Inclusivity. Every voice counts. Everyone contributes to our mission.

What we offer

• Competitive salary and stock options (ESOP) from day one

• Multicultural team with daily exposure to Portuguese, Spanish, and English (our corporate language)

• Annual learning budget and internal accelerated development paths

• High-ownership environment: we move fast, learn fast, and raise the bar — together

• Smart, ambitious teammates — low ego, high impact

• Flexible vacation and hybrid work model focused on results

If you’re ready for growth, ownership, and impact — apply now and help us redefine B2B finance in Latin America.

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Clara’s Hybrid Policy

Claridians in a hybrid mode split their time between working from the office, talking to or visiting customers, or working from home. This hits a balance between bringing people together for in-person collaboration and learning from each other, while supporting flexibility about how to do this in a way that makes sense for each individual and team.

We don't enforce a minimum number of days for most roles, but you're expected to spend time at the office organically, and be at the office most days during your ramp-up or when required by your leader.