Senior Software Engineer Experience (Senior Ingeniero de Software Experience) Mexico City (Hybrid)

Ready to accelerate your career

About the Role

Were looking for a hands-on Senior Software Engineer with deep expertise in high-scale event-driven systems built in Java.

This role focuses on designing and operating distributed systems that process high-volume of events across batch and real-time workflows. Youll contribute architectural ideas optimize performance at scale and improve system resilience without acting as a formal Tech Lead.

Our platform runs on AWS and OpenShift (OCP) leverages PostgreSQL and document-oriented NoSQL databases and demands strong performance discipline.

If youve tuned the JVM under load optimized JSONB queries in production and built reactive systems that dont fall apart under concurrency we should talk.

Key Responsibilities

• Design and implement high-performance backend services in Java
• Build and evolve reactive event-driven architectures handling millions of events
• Contribute to both batch pipelines and real-time streaming flows
• Apply reactive programming principles (Project Reactor Spring WebFlux or similar)
• Design and implement resilient asynchronous patterns (retries backpressure circuit breakers)
• Optimize JVM performance (GC tuning thread pools memory usage non-blocking I/O)
• Design flexible data models using NoSQL in document-style patterns
• Optimize PostgreSQL performance including JSONB-heavy queries indexing strategies (GIN partial indexes) and query plan analysis
• Analyze locking contention and concurrency bottlenecks
• Implement strong observability practices (metrics tracing distributed logging)
• Collaborate in architecture discussions and contribute scalable design improvements

What Were Looking For

• 7 years of backend engineering experience with strong Java expertise
• Proven experience building and operating large-scale event processing systems
• Hands-on experience with reactive programming (Project Reactor WebFlux RxJava etc.)
• Deep understanding of non-blocking I/O and asynchronous execution models
• Strong experience with event-driven architectures (Kafka SQS/SNS RabbitMQ etc.)
• Solid understanding of distributed systems (eventual consistency ordering guarantees idempotency)
• Experience tuning the JVM in production environments
• Strong PostgreSQL performance tuning skills
• Hands-on experience optimizing JSONB queries (GIN indexes containment queries query plan analysis)
• Experience using NoSQL with flexible/document-style data models
• Strong PostgreSQL performance tuning skills including JSONB optimization and indexing strategies
• Experience working in AWS environments and familiarity with Kubernetes-based platforms (OpenShift/OCP)

Nice to Have

• Experience with Kafka Streams or stream processing frameworks
• Experience designing hybrid batch streaming architectures
• Experience with caching strategies (Redis)
• Familiarity with load testing and benchmarking tools
• Experience in defining and monitoring performance SLAs/SLOs

Why join Clara

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.

Who we are

• 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.

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 were 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 youre ready for growth ownership and impact apply now and help us redefine B2B finance in Latin America.

Claras 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 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.