Middle/Senior Full-Stack Engineer (Node.js / React / Python, AWS)

About the Project

We’re building an AI-powered video platform that aggregates and processes content from multiple social media sources. Users interact with video data through contextual search, LLM-powered features, and AI agent workflows.

You’ll join a small, focused engineering team working closely with technical leadership and product stakeholders, contributing across the stack with a strong focus on backend development and AWS infrastructure.

Tech Stack

Backend — Node.js / TypeScript

• Node.js
• TypeScript
• AWS Lambda
• AWS SDK
• Express
• Serverless Framework
• Zod
• Lodash

Backend — Python

• Python 3.13
• Pydantic
• Strands Agents / Strands Agents Tools
• boto3
• AWS Lambda Powertools
• Loguru
• httpx / requests / aiohttp
• uv

Frontend

• React 19
• TypeScript
• Vite
• React Query
• Zod
• AWS Amplify
• Axios
• i18next
• Tailwind CSS
• Ant Design
• React Toastify

Cloud & Infrastructure

• AWS
• Lambda
• Cognito
• DynamoDB
• Step Functions
• Serverless
• Terraform

Your Role

As a Full-Stack Engineer with a backend focus, you’ll work across the application while taking significant ownership of backend services, APIs, AWS infrastructure, and integrations.

The core backend stack is Node.js / TypeScript, with Python used for AI agents and related services. You’ll also contribute to React-based frontend development when needed.

Responsibilities

• Design, develop, and maintain backend services using Node.js and TypeScript
• Build and maintain serverless services and APIs on AWS Lambda
• Work with AWS services including Cognito, DynamoDB, Lambda, and Step Functions
• Develop integrations between backend services, AI agents, and external APIs
• Contribute to Python-based AI and agent services
• Build and maintain frontend functionality using React and TypeScript
• Design reliable data flows and asynchronous workflows
• Contribute to AWS infrastructure and Infrastructure-as-Code
• Troubleshoot performance, integration, and production issues across the stack

• Collaborate with product, AI, and engineering teams on architecture and implementation decisions

   

What We’re Looking For

• Mid-to-Senior level experience in full-stack software development
• Strong commercial experience with Node.js and TypeScript
• Strong experience with React and TypeScript
• Good understanding of backend architecture and REST APIs
• Practical experience with AWS, particularly serverless architecture
• Experience with services such as Lambda, Cognito, DynamoDB, and Step Functions
• At least basic-to-intermediate knowledge of Python and the ability to work with an existing Python codebase
• Understanding of Infrastructure-as-Code and cloud infrastructure
• Ability to work independently and take ownership of technical solutions
• English B2 or higher

Nice to Have

AI / LLM integrations

• Experience integrating OpenAI, Anthropic, or Google GenAI
• Experience with AWS Bedrock / Bedrock AgentCore
• Familiarity with Instructor
• Experience with AI agent frameworks, ideally Strands Agents
• Experience building LLM-powered workflows or agent-based systems

Observability

• Datadog
• ddtrace
• datadog-lambda

• AWS X-Ray

   

Infrastructure

• Terraform
• Serverless Framework
• Experience designing event-driven or distributed AWS architectures

Being part of 3asoft means having

• High level of flexibility and freedom
• Direct communication with international customers
• Competitive compensation paid in USD
• Fully remote work