Senior Backend Engineer (with Frontend Competency) (Ingeniero Backend Senior con Competencia Frontend) Hybrid

Were looking for a Senior Backend Engineer to join Claras Payments Tribe We are responsible for powering seamless secure and scalable financial transactions across our entire platform.

In this role you will focus heavily on the engine under the hood. Your primary strength and passion lie in backend architecture distributed systems system design and complex data orchestration. While your core focus is the backend you possess the frontend competence required to build clean functional user interfaces and ensure smooth API consumption on our client-side applications.

AI fluency is central to how we work on this team youre expected to use it across the full development lifecycle from design to deployment and to reach for it whenever it makes you faster or better.

• Architect Core Infrastructure: Design build and maintain highly secure resilient backend services in Java/Spring Boot that interface with payment processors and local financial networks across Latin America.
• Optimize Data & Performance: Ensure high-availability and asynchronous processing of transaction financial data keeping system latency low and success rates high.
• Bridge to the Frontend: Develop and maintain the React-based frontend applications dashboards and internal tooling that interact with your backend services ensuring deep integration and clean API consumption.
• Leverage AI: Use AI tools to automate repetitive engineering workflows accelerate delivery and close skill gaps from scaffolding new banking integrations to generating and reviewing code.
• Lead & Mentor: Set the technical bar through backend code reviews robust system design reviews and hands-on mentorship of junior and mid-level engineers.
• Own System Observability: Implement monitoring logging and tracing across the full stack to quickly isolate and fail-gracefully when external financial APIs experience downtime.

Were looking for an autonomous systems-minded engineer who loves complex data flows values strict security and understands how to deliver clean code from database to browser.

• Experience: 5 years of software engineering experience with a heavy specialization in Backend/Systems development within a Fullstack or Distributed Systems context.
• Backend Mastery (Java / Spring Boot): Strong proficiency in Java and the Spring ecosystem. Deep understanding of relational databases concurrency microservices architecture and building APIs that scale gracefully.
• Frontend Competency (React): 2 years of practical commercial experience with React and its modern ecosystem (Hooks state management). You dont need to be a CSS pixel-perfect designer but you must be fully confident in building structuring and optimizing responsive web apps.
• API & System Integration: Proven experience designing and consuming RESTful and event-driven web services (e.g. Kafka RabbitMQ).
• Testing & CI/CD: Strong practices in TDD integration testing (JUnit Mockito) and frontend testing alongside automated deployment pipelines (GitHub Actions).
• AI-Native Mindset: Demonstrated use of AI tools throughout the development process (design coding debugging). Experience using tools like Claude Copilot Devin or workflow automation like n8n is highly valued.
• Communication: Working proficiency in English and comfort collaborating cross-functionally with Product Design and Operations.

• Fintech Domain Knowledge: Prior experience with high-traffic payment gateways ledger systems or local financial networks (like Pix in Brazil).
• Security & Compliance: Experience handling sensitive financial data (PCI-DSS standards encryption tokenization).

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

• Were the leading B2B fintech for spend management in Latin America.

• Certified as one of the worlds 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 were 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 youre ready for growth ownership and impact apply now and help us redefine B2B finance in Latin America.

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 dont enforce a minimum number of days for most roles but youre 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.