Remote AI-Driven TypeScript/Node.js Backend Engineer

SmartRecruiters, Inc.; Wrocław; Hybrid; PLN 180,000 - 260,000; Full time

Job summary

Sigma Software is seeking a Middle/Senior AI & Back-End Developer to join a Sweden-based AdTech project, focusing on transforming an existing ecosystem into a modern AI-enabled, platform-first architecture. You will work with TypeScript/Node.js across serverless AWS services and AI-powered features.

The role is remote-friendly with an emphasis on scalable microservices, API-first design, and collaboration with distributed teams to deliver high-performance back-end solutions and AI-driven

Qualifications

• 3+ years of commercial Back-end or AI software development experience.
• Strong TypeScript and Node.js hands-on experience.
• Experience integrating AI services, LLM APIs, or AI-assisted workflows.
• Hands-on with AWS serverless technologies including Lambda, API Gateway, DynamoDB, and EventBridge.
• Familiarity with RESTful and GraphQL APIs.
• English proficiency (Upper-Intermediate or higher).

Responsibilities

• Develop and maintain high-performance back-end microservices and AI-enabled services.
• Design and implement AI-enabled platform features and LLM-powered capabilities.
• Build scalable serverless solutions using AWS Lambda, API Gateway, DynamoDB, and EventBridge.
• Collaborate on API-first architecture and OpenAPI specs.
• Ensure tenant data isolation within multi-tenant AdTech data models.
• Contribute to reusable libraries, templates, and AI integration patterns.
• Participate in code reviews focusing on performance and reliability.
• Translate product and AI requirements into scalable tech solutions.
• Support platform transformation toward automation and standardization.
• Drive continuous improvement and technical decision-making.

Skills

TypeScript

Node.js

AWS

APIs

GraphQL

LLM integration

Multi-tenant

Prompt engineering

English

AI services

Tools

AWS Lambda

API Gateway

DynamoDB

EventBridge

Terraform

CloudFormation

Job description

Sigma Software is seeking a Middle/Senior AI & Back-End Developer to join a Sweden-based AdTech project, focusing on transforming an existing ecosystem into a modern AI-enabled, platform-first architecture. You will work with TypeScript/Node.js across serverless AWS services and AI-powered features.

The role is remote-friendly with an emphasis on scalable microservices, API-first design, and collaboration with distributed teams to deliver high-performance back-end solutions and AI-driven