Middle Support Engineer (Node.js)

MasterBorn is hiring for a Support Engineer role to improve their world-class service. The position involves working with a US-based client, Payments.ai, focusing on fixing and debugging modern, scalable web applications using Node.js frameworks with TypeScript and (No)SQL technologies primarily on AWS Cloud.

• 2+ years of commercial experience in Node.js
• Experience with AWS services such as Cognito, CloudWatch, SQS, SES, Lambda for application debugging
• Good understanding of JavaScript (ES2018+), OOP, clean code, and best practices
• Experience with at least one Node.js backend framework (preferably Express.js, also Koa.js or others)
• Experience working on projects using Node.js frameworks
• Experience with relational SQL databases and ORM/query builders (e.g., Sequelize, Knex)
• Experience with NoSQL and/or in-memory databases (e.g., MongoDB, Redis)
• English language proficiency at C1 level for client communication and documentation
• Polish language proficiency at C1 level for team communication
• Strong problem-solving abilities and detail orientation

Nice to have:

• Support-level experience, open-source contributions, experience with serverless architectures and TypeScript
• Familiarity with process automation tools like n8n, Zapier, or Make
• Basic experience with Docker
• Experience working in Agile/Scrum teams with code quality monitoring
• Ability to debug and fix basic React issues
• Experience in other support roles

• Communicate with clients to gather issue reports and troubleshoot during 14-22 CET/CEST hours
• Review error tracking tools, infrastructure, and third-party connections and debug as needed
• Prioritize and solve ongoing client requests and bugs
• Provide proactive communication and problem-solving to ensure top-quality service
• Write readable and maintainable JavaScript code
• Participate technically in product improvement and bug fixing
• Design and modify basic database structures
• Write documentation for code and solutions
• Translate business complexities (user stories/tasks) into solutions collaboratively
• Stay updated with trends, share knowledge, and teach others
• Improve and reuse the company’s knowledge base