Mid-Level Back-End Software Engineer

Acoustic

full-time

Posted on: 9/20/2025

Origin: • 🇵🇱 Poland

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Mid-LevelSenior

AWSCloudDockerGraphQLJavaJavaScriptJestKafkaKubernetesMongoDBMySQLNode.jsRedisScalaTypeScript

About the role

Design, develop, and maintain server-side applications using Node.js
Build and integrate RESTful APIs and GraphQL endpoints
Participate in system architecture discussions and technical design reviews
Ensure applications are scalable, secure, and performant
Write unit tests, integration tests, and end-to-end tests
Participate in code reviews and provide constructive feedback to team members
Debug and troubleshoot application issues across development, staging, and production environments
Monitor application performance and implement optimizations
Work closely with product managers, designers, and other engineers
Collaborate with frontend developers to ensure seamless integration between client and server-side components
Participate in sprint planning, grooming, daily standups, and retrospectives
Mentor junior developers and contribute to team knowledge sharing
Document technical specifications and maintain project documentation

3-5 years of professional software development experience
Strong proficiency in Node.js, JavaScript (ES6+) and TypeScript
Experience with Nest.js or similar Node.js frameworks
Proficiency with database technologies (MongoDB, Redis, MySQL, or similar)
Experience with RESTful API design and implementation
Understanding of software testing frameworks (Jest, or similar)
Strong problem-solving and analytical thinking abilities
Excellent communication and collaboration skills
Ability to learn new technologies and adapt to changing requirements
Knowledge of cloud platforms (AWS)
Familiarity with containerization (Docker, Kubernetes)
Experience with message queues (Kafka, Kinesis, or similar)
Knowledge of GraphQL and Wundergraph or similar
Experience with Snowflake
Understanding of security best practices and authentication systems (OAuth, JWT)
Experience with modern Java/Scala is appreciated
Knowledge of serverless architecture and functions
Experience with monitoring and logging tools (Loki, Datadog, Kibana)