Sigma Software Group

Senior Full Stack Developer, Node.js/ReactJS

Sigma Software Group

full-time

Posted on:

Location Type: Remote

Location: Ukraine

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Job Level

Senior

Tech Stack

AWSCloudDockerGoogle Cloud PlatformGraphQLJavaScriptKubernetesMicroservicesNode.jsNoSQLReactSQL

About the role

  • Design, develop, and maintain scalable applications across front-end and back-end layers
  • Develop robust back-end services and APIs (REST/GraphQL) using Node.js
  • Build responsive, user-friendly UIs using ReactJS
  • Collaborate closely with data engineers and ML teams to integrate AI features and data-driven logic into the product
  • Optimize application performance, scalability, and reliability in a cloud environment
  • Implement best practices for security, CI/CD, testing, and code quality
  • Work with product and design teams to translate business requirements into technical solutions
  • Take ownership of features from ideation to deployment and monitoring in production
  • Stay up to date with emerging technologies and contribute to technical decision-making and innovation within the team

Requirements

  • 5+ years of professional experience with JavaScript, including modern frameworks and tools
  • Expert proficiency in Node.js for scalable back-end services and APIs
  • Expertise in ReactJS for modern, responsive front-end interfaces
  • Experience designing and implementing Data APIs for efficient workflows
  • Familiarity with VectorDB or similar vector databases for AI/ML applications
  • Hands-on experience with AWS or GCP, including deployment and management
  • Strong knowledge of RESTful APIs, microservices, and database systems (SQL/NoSQL)
  • Upper-Intermediate level of spoken and written English
  • Experience with Model Context Protocol (MCP) for AI model interactions will be a plus
  • Familiarity with workflow automation tools such as Langflow or n8n will be a plus
  • Knowledge of DevOps practices, CI/CD pipelines, or containerization (Docker, Kubernetes) will be a plus
Benefits
  • Employees can work remotely
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
JavaScriptNode.jsReactJSREST APIsGraphQLData APIsAWSGCPSQLNoSQL
Soft Skills
collaborationownershipcommunicationproblem-solvinginnovation