Middle/Senior Full-Stack Engineer — Frontend Focus (React / Node.js / 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.
We’re looking for a Full-Stack Engineer with a strong frontend focus who is comfortable owning complex React functionality while also contributing to Node.js backend services and AWS-based infrastructure.

Tech Stack
Frontend
React 19
TypeScript
Vite
React Query
Zod
AWS Amplify
Axios
i18next
Tailwind CSS
Ant Design
React Toastify
Backend
Node.js
TypeScript
AWS Lambda
AWS SDK
Express
Serverless Framework
Zod
Lodash
Cloud & Infrastructure
AWS
Lambda
Cognito
DynamoDB
Step Functions
Serverless
Terraform
Python / AI services
Python 3.13
Pydantic
Strands Agents
boto3
AWS Lambda Powertools

Your Role
As a Full-Stack Engineer with a frontend focus, you’ll take ownership of the web application and work closely with backend and AI services.
Most of your work will be around React and TypeScript, but you should also be comfortable working with Node.js backend services, APIs, and AWS infrastructure.
Python is used mainly within AI and agent-related services. Deep Python expertise is not required, but you should be comfortable reading and understanding an existing Python codebase.

Responsibilities
Develop and maintain complex frontend functionality using React and TypeScript
Build reusable, scalable, and maintainable UI components
Work with asynchronous data flows, APIs, React Query, and client-side state
Integrate frontend functionality with backend and AI-powered services
Contribute to backend services using Node.js and TypeScript
Work with AWS services including Lambda, Cognito, DynamoDB, and Step Functions
Collaborate on application architecture and technical decisions
Troubleshoot frontend performance and integration issues
Participate in code reviews and maintain high engineering standards
Work closely with product, backend, and AI engineers

What We’re Looking For
Mid-to-Senior level experience in full-stack software development
Strong commercial experience with React and TypeScript
Strong understanding of modern frontend architecture and component design
Experience with API integrations and asynchronous frontend workflows
Good practical experience with Node.js and TypeScript
Understanding of backend architecture and REST APIs
Experience working with AWS or similar cloud infrastructure
Familiarity with services such as Lambda, Cognito, DynamoDB, or Step Functions
Basic familiarity with Python and ability to understand an existing Python codebase
Ability to independently own features from implementation through production
English B2 or higher

Nice to Have
AI / LLM
Experience integrating OpenAI, Anthropic, or Google GenAI APIs
Familiarity with AWS Bedrock / Bedrock AgentCore
Familiarity with AI agent frameworks or LLM-powered applications
Infrastructure & Observability
Terraform
Serverless Framework
Datadog
ddtrace
AWS X-Ray

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