Middle Typescript/Node.js Developer with AI experience (AdTech)

Description: Join Sigma Software as a Middle/Senior AI & Back-End Developer to transform a global AdTech product into a modern AI-enabled ecosystem. Work remotely with cutting-edge cloud-native and AI technologies, focusing on a Platform-First architecture with reusable microservices and intelligent automation. Requirements: 3+ years of experience as a Back-end Developer or AI Software Developer. Strong hands-on experience with TypeScript and Node.js. Experience in building API-first microservice architectures and integrating AI services. Proficient with AWS serverless technologies (Lambda, API Gateway, DynamoDB, EventBridge). Understanding of RESTful and GraphQL APIs, multi-tenant architectures, and data isolation principles. Upper-Intermediate or higher English level. Benefits: Opportunity to work on a product trusted by globally recognized publishers. Grow expertise in AI integrations, cloud platforms, and scalable distributed systems.