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