Senior Node Backend Engineer

Lean Tech is a rapidly expanding organization situated in Medellín, Colombia. We pride ourselves on possessing one of the most influential networks within software development and IT services for the entertainment, financial, and logistics sectors. Our corporate projections offer a multitude of opportunities for professionals to elevate their careers and experience substantial growth. Joining our team means engaging with expansive engineering teams across Latin America and the United States, contributing to cutting-edge developments in multiple industries.

Senior Node/AWS Software Engineer

Location: LATAM - Remote

As a Senior Backend Engineer specializing in , you will take the lead in developing and optimizing scalable, secure backend systems using serverless AWS architecture. You will be responsible for designing, developing, and maintaining critical backend components such as APIs, databases, and microservices, while working collaboratively with cross-functional teams to deliver impactful solutions.

Your expertise in , AWS services, and CI/CD pipelines will be essential for writing clean, maintainable code and optimizing performance. This role is integral to delivering high-profile projects and leveraging cutting-edge technology, fitting seamlessly within the larger organization by collaborating with frontend, DevOps, and other engineering teams. You will face unique challenges in enhancing scalability, performance, and reliability, and you will be expected to contribute to the evolution of modern software development practices.

Your responsibilities will include:

• Lead the design, development, and maintenance of serverless backend systems using and AWS services, including Lambda, DynamoDB, ECS, and RDS.
• Implement and refine microservices architecture to enhance scalability, performance, and reliability.
• Conduct code reviews and software analysis to ensure optimization and code quality, focusing on extensive experience with and the Express framework.
• Manage support requests within ticketing systems to facilitate timely transaction processing and issue resolution.
• Develop and maintain APIs using GraphQL to support evolving application features.
• Establish and optimize CI/CD pipelines for efficient code deployment and integration, leveraging tools like GitHub/GitLab.
• Collaborate with frontend, DevOps, and other teams to define and implement new features, driving decision-making processes with advanced knowledge of JavaScript and serverless architecture.
• Continuously monitor application performance, troubleshooting as required, and contributing to stability enhancements.
• Research and integrate new technologies to improve the backend tech stack, exploring opportunities in AWS services and infrastructure tools like Docker, Kubernetes, Terraform, and CloudFormation.

To excel in this role, you should possess:

• Extensive experience as a Backend Developer with a strong focus on and JavaScript, including frameworks like Express and NestJS.
• Advanced proficiency with AWS services, including IAM, Lambda, DynamoDB, API Gateway, ECS, S3, SQS/SNS, and RDS.
• Strong understanding of serverless architecture and event-driven design, with experience in microservices architecture.
• Experience with both SQL and NoSQL databases.
• Intermediate proficiency in version control tools such as GitHub or GitLab.
• Intermediate knowledge of CI/CD pipelines and automation practices for efficient deployment and integration.
• Experience with infrastructure management tools such as Kubernetes, Terraform, Docker, and CloudFormation.
• Understanding of serverless identity management using AWS Cognito.
• Familiarity with Agile and Waterfall software development methodologies.
• Strong leadership and communication skills, with the ability to manage stakeholders effectively.
• Demonstrated ability to work both independently and collaboratively in a team environment.
• Adaptable and proactive, committed to continuous learning and improvement.
• Design, develop, and optimize highly efficient and scalable Extract, Transform, Load (ETL) and ELT processes using AWS Glue jobs written primarily in Python and/or PySpark.
• Implement advanced transformation logic, including data cleansing, de-duplication, aggregation, and data standardization.
• Work with raw data to enforce the data stamping logic based on the nth job run [optional - ensuring proper S3 partitioning for optimized query performance].
• Configure and manage AWS Glue Crawlers and Classifiers to automatically infer schema and register metadata in the AWS Glue Data Catalog.
• Implement Data Catalog best practices, including partitioning strategies, to enable efficient querying via tools like Amazon Athena.
• Understand and sometimes support our cloud data infrastructure using Infrastructure as Code (IaC) tools such as Terraform or AWS CloudFormation/CDK.
• Automate the deployment and configuration of all data services, including AWS Glue jobs, workflows, S3 buckets, IAM roles, and networking components.
• Ensure IaC scripts are flexible and extensible to support new data sources and environments (Dev, Test, Prod) with minimal modification.

• Familiarity with Google Cloud Platform.
• Familiarity with frontend development using
• Proficiency in TypeScript to enhance applications.
• Experience with Python or Java for cross-functional collaboration.
• Knowledge of advanced optimization techniques for microservices management.
• Experience with graph databases for enhanced data modeling capabilities.
• Experience in DevOps practices and tools beyond the core CI/CD pipelines.
• Certifications in AWS or other cloud solutions that demonstrate expertise.
• Strong analytical skills for complex problem-solving in backend development.
• AWS Certified Data Engineer – Associate or other relevant AWS certifications.
• Knowledge of data security best practices within AWS.
• Understanding of relational and NoSQL databases, data warehousing concepts, and strong SQL skills.
• Familiarity with data formats like Parquet, JSON, and CSV.

• Join a powerful tech workforce and help us change the world through technology.
• Professional development opportunities with international customers.
• Collaborative work environment.
• Career paths and mentorship programs that will lead to new levels.

Join Lean Tech and contribute to shaping the data landscape within a dynamic and growing organization. Your skills will be honed, and your contributions will be vital to our continued success.

Lean Tech is an equal-opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.