Senior JavaScript Engineer – MERN

Varicent

full-time

Posted on: 9/17/2025

Origin: • 🇦🇷 Argentina

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Senior

AWSCloudDockerDynamoDBGraphQLJavaScriptKafkaMicroservicesNode.jsNoSQLReactReduxServiceNowSQLTypeScript

About the role

Lead the design and development of new features using the MERN stack
Build cloud-native apps with AWS Lambda, Aurora, DynamoDB, ECS, and GraphQL
Improve system scalability, performance, and architecture
Write clean, efficient, and maintainable code with CI/CD and test automation
Collaborate closely with product and design to deliver intuitive user experiences
Guide and mentor junior developers through code reviews and technical mentoring
Shape technical decisions and contribute to building scalable, cloud-native solutions
Work on a high-impact single-page application using React, GraphQL, and a serverless AWS backend

5+ years of experience in modern web development with React, Node.js, TypeScript, and JavaScript
Strong background with microservices, cloud architecture, and serverless development (preferably AWS)
Solid knowledge of SQL, NoSQL, and API design (REST/GraphQL)
Experience in automated testing, CI/CD, and agile delivery environments
Proficiency in English communication (verbal and written)
Ability to work within Eastern Standard Time (EST) business hours
Candidates must be based in Argentina (role open to Argentina only)
Please submit your resume in English
Nice to have: Experience with Redux, messaging systems (Kafka, Kinesis), or Docker
Nice to have: AWS certification or equivalent hands-on expertise
Nice to have: Background in product-focused teams or SaaS platforms