Lead Full Stack Engineer - Users & Auth (Ingeniero/a Lead Full Stack - Usuarios y Autenticación) - Hybrid
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.
Lead Full Stack Engineer — Users & Auth
We're looking for a Lead Full Stack Engineer to own 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 end-to-end: 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. 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:
- Owning auth end-to-end: architecture, implementation, and Auth0 integration across frontend and backend
- Leading a multidisciplinary team — sprint planning, standups, retros
- Elevating the team through pairing, mentorship, and sharing what you know
- Setting and holding the quality bar — through code reviews, design reviews, and your own work
- Reviewing product specs from the technical lens — flagging feasibility gaps and spotting where AI tooling can close work that would otherwise take months
Who you are
- 5+ years of software engineering experience with solid execution in production environments
- 2+ years of hands-on experience implementing authentication and authorization with Auth0 or comparable identity platforms
- Strong in Java and Spring on the backend, with solid frontend experience — React preferred
- Solid understanding of security best practices for web applications and secure software design in distributed architectures
- A technical product mindset grounded in security — you know how to balance velocity with the constraints of owning critical systems
- 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, with the ability to lead technical discussions 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.
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 areWe’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.
#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.
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.
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.
Skills Required
- 5+ years of software engineering experience with production execution
- 2+ years implementing authentication and authorization with Auth0 or comparable identity platforms
- Strong experience with Java and Spring on the backend
- Solid frontend experience
- React experience
- Solid understanding of security best practices for web applications and secure software design in distributed architectures
- Experience leading a multidisciplinary engineering team (sprint planning, standups, retros)
- English proficiency for leading technical discussions across geographies
- High autonomy, proactivity, and ownership mindset
- Active experimentation with AI tools and eagerness to apply AI to development
Clara Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Clara and has not been reviewed or approved by Clara.
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Equity Value & Accessibility — Equity grants are emphasized across several descriptions, with stock options commonly included and in some instances available from day one. Feedback suggests this ownership component is a meaningful part of total rewards.
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Leave & Time Off Breadth — Time off offerings are portrayed as flexible, including references to flexible vacation and flexible time off policies. Feedback suggests this supports work–life balance for many roles.
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Wellbeing & Lifestyle Benefits — Wellness support is cited through mental‑health platforms, coaching and meditation programs, and monthly wellness reimbursements in some contexts. Feedback suggests these offerings complement core benefits where available.
Clara Insights
What We Do
Clara is the leading payment platform for companies in Latin America. Our end-to-end solution includes our locally-issued corporate cards, Bill Pay, crossborder payments, and our highly-rated software platform used by thousands of the most successful companies across the region. Clara is backed by top global and regional investors such as Coatue, DST Global, General Catalyst, monashees, Kaszek, Canary, A*, BoxGroup, SV Angel, GFC, Picus Capital, Avid Ventures, ICONIQ Growth, Goldman Sachs, and prominent angel investors. Driven by our six core values (Ownership, Pride, ABC, Simplicity, Clarity and Inclusivity) we’ve reached a unicorn valuation in record time, have been recognized as a Great Place to Work and as one of the most promising startups according to Linkedin’s ranking “Top Startups 2021”. We’re looking for the best talent worldwide to join our team and be part of this journey, so you can't afford to miss this chance! We are: * Shaping business finances in Latin America * Driven by our 6 core values * Proud of our inclusive and caring culture * Certified as a Great Place to Work and a Top LinkedIn Startup
