Senior Full-Stack with (Azure/React/Node.js/Python) Developer

We are looking for a Senior Full-Stack Developer with deep experience in cloud-based backend development, secure API architecture, ETL pipelines, and modern frontend interfaces. The ideal Toptal engineer is strong in Azure, React, Kubernetes and backend security best practices, with the ability to take features from architecture to production independently.

Responsibilities:

• Build and maintain backend services on Azure (Functions, App Services, API Management, Event Hub/Service Bus, Key Vault).

• Architect secure APIs, enforce auth standards (OAuth2, JWT), and implement best practices for secrets management, encryption, and threat mitigation.

• Design, build, and optimize ETL/ELT data flows (batch and streaming) for ingestion, transformation, validation, and monitoring.

• Develop high-quality React/TypeScript front-end applications.

• Implement scalable cloud infrastructure patterns including distributed workloads, observability, and automated CI/CD.

• Collaborate with data science and product teams to deliver customer-facing features end-to-end.

• Contribute to architecture discussions and help define engineering best practices.

Requirements:

• 5+ years experience in engineering 

Strong proficiency in:

• Azure Functions, App Services, API Management, Event Hub/Service Bus

• React, TypeScript, Node.js

• Python, Rest API frameworks (Flask, FastAPI etc). LangChain

• ETL pipelines and data workflow orchestration

• English - B1-B2

Strong understanding of backend security best practices:

• OAuth2, JWT, RBAC/permissions

• Secure secrets & credential handling

• API rate limiting, logging, audit trails

• Experience building production-grade cloud architectures.

• Ability to work independently in a fast-paced startup environment.