RYZ Labs is looking for an experienced Senior Backend Developer to join one of our clients’ teams. In this position, you will leverage your expertise in system architecture, database management, and cloud deployments to drive the development of scalable and efficient applications.Requirements- 5+ years of professional experience building backend services.- Proficiency in TypeScript and/or Python.- Strong experience with SQL/NoSQL databases and in-memory caching.- Deep understanding of system design, including event-driven architectures, messaging queues, and scalable service patterns.- Familiarity with technologies like Kafka, RabbitMQ, AWS SQS/SNS, Redis Streams, or similar.- Experience with microservices and asynchronous workflows.- Knowledge of security best practices, including authentication and authorization.- Experience with observability, infrastructure as code (Terraform preferred), and CI/CD automation.- Strong communication skills and a collaborative mindset.Nice to have- Experience with search technologies (Elasticsearch, OpenSearch) and managing their associated infrastructure.- Experience integrating modern AI and machine learning techniques into production applications.- Willingness to learn and contribute to frontend development (React or React Native) on occasion.Responsibilities- Build and maintain backend services and APIs (REST, GraphQL) using frameworks like Express, Fastify, and Apollo.- Manage and optimize databases (Postgres, DynamoDB) and in-memory stores (Redis, Memcached), including schema design, indexing, replication, and query optimization.- Drive improvements in system architecture, including event-driven design, asynchronous workflows, and messaging/pub-sub systems.- Design, deploy, and maintain services on AWS (Lambda, Fargate/EC2, S3, RDS/DynamoDB, SQS/SNS, CloudFront, Cognito).- Debug and refactor legacy systems to improve scalability, performance, and reliability.- Implement and manage observability (logging, monitoring, alerting).- Contribute to infrastructure as code (Terraform or similar) and CI/CD pipelines.About RYZ Labs:RYZ Labs is a startup studio founded in 2021 by two lifelong entrepreneurs. The founders of RYZ have worked at some of the world's largest tech companies and some of the most iconic consumer brands. They have lived and worked in Argentina for many years and have decades of experience in Latam. What brought them together was their passion for the early phases of company creation and the idea of attracting the brightest talents in order to build industry-defining companies in a post-pandemic world.Our teams are remote and distributed throughout the US and Latam. They use the latest cutting-edge cloud computing technologies to create scalable and resilient applications. We aim to provide diverse product solutions for different industries and plan to build a large number of startups in the upcoming years.At RYZ, you will find yourself working with autonomy and efficiency, owning every step of your development. We provide an environment of opportunities, learning, growth, expansion, and challenging projects. You will deepen your experience while sharing and learning from a team of great professionals and specialists. Our values and what to expect:- Customer First Mentality - Every decision we make should be made through the lens of the customer.- Bias for Action - urgency is critical, expect that the timeline to get something done is accelerated.- Ownership - Step up if you see an opportunity to help, even if it's not your core responsibility. - Humility and Respect - Be willing to learn, be vulnerable, and treat everyone who interacts with RYZ with respect.- Frugality - being frugal and cost-conscious helps us do more with less- Deliver Impact - get things done most efficiently. - Raise our Standards - always be looking to improve our processes, our team, and our expectations. The status quo is not good enough and never should be.