Senior Software Engineer

R2 Companies

Senior Software Engineer designing highly scalable systems for R2, a fintech unlocking SMB potential. Collaborating across teams to improve service delivery and promote growth.

Posted 7/10/2026contractRemote • 🇧🇷 BrazilSeniorWebsite

Tech Stack

Tools & technologies

DockerDynamoDBGoGraphQLGRPCJavaJenkinsKubernetesMicroservicesMongoDBNoSQLPostgresPythonReactRustSpinnaker

About the role

Key responsibilities & impact

Design, build, and maintain APIs, services, and systems across R2
Own the product and solution architecture
Ensure best practices and uptime
Contribute to company-wide standards and reliability
Ensure delivery of mission-critical systems with tight deadlines
Increase the quality of the delivered code, towards a zero-bug policy
Research and invest in new tooling to improve services
Think about security throughout everything you do
Promote a culture that fosters learning, growth, risk-taking, and accountability
Work with other teams to figure out how to build tools to make them more productive

Requirements

What you’ll need

5+ years of engineering experience building API-driven services, with an appetite to code on a daily basis.
Experience with distributed architecture patterns, in particular microservices.
Experience programming in either Go, Python, Java, or Rust.
Experience in designing and implementing robust data models for production using relational databases (PostgreSQL, etc.) and/or NoSQL (MongoDB, DynamoDB, etc).
Experience in containers (Docker, Docker Compose, Kubernetes).
Experience in CI/CD pipelines (Gitlab CI, Spinnaker, Jenkins, GoCD, Concourse, etc.)
Experience designing and implementing Event-Driven architectures.
Working experience with gRPC, Service Meshes (Istio, Linkerd, etc), API Gateways.
Familiar with UI technologies such as React, GraphQL, Server-side rendering, etc.
Experience building integrations with 3rd-party APIs/services is a big plus.

Benefits

Comp & perks

The chance to join a high-impact, mission-driven fintech with regional scale
Cross-functional collaboration with exceptional teams across Latin America
Equipment provided by R2
Training budget for professional development
Career growth within R2

ATS Keywords

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Hard Skills & Tools

API DevelopmentMicroservicesGo ProgrammingPython ProgrammingJava ProgrammingRust ProgrammingPostgreSQLMongoDBDockerKubernetes

Soft Skills

Problem-SolvingCollaborationAccountabilityLearning Culture Promotion