Full-Stack Developer: React/TypeScript + .NET on Azure

Psi CRO; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

Milestone One is a Site Enabling Services organization seeking a Full-Stack Developer to design, build, and maintain internal platforms and integrations. The role involves a React/TypeScript frontend, a .NET/C# backend, and an API layer hosted on Azure with Microsoft 365 integration.

You will work in a small team, focusing on data-first product development, documented testing, security, and governance, including OpenTofu/Terraform for infrastructure as code and AI-assisted coding practices.

Qualifications

• Experience building web apps with React/TypeScript and a C#/NET backend.
• SQL schema design and data modeling; writing efficient queries.
• REST API design with authentication/authorization (Entra ID, OAuth 2.0).
• CI/CD pipelines and code reviews in GitHub Actions or Azure DevOps.
• Secure coding practices and handling sensitive data.

Responsibilities

• Design and document data models (Azure SQL) for central data platform and reporting.
• Develop secure REST APIs and backend services (C#, Azure) with access controls.
• Build React/TypeScript front ends that integrate with intranet and design system.
• Create integrations between internal systems and third-party services via APIs/webhooks.
• Work in GitHub: PRs, reviews, CI/CD, code and secret scanning.

Skills

React/TypeScript

C#/ .NET

SQL

REST API design

Git & CI/CD

Security best practices

English fluency

Tools

Azure

OpenTofu/Terraform

Playwright

GitHub Actions

Job description

Milestone One is a Site Enabling Services organization seeking a Full-Stack Developer to design, build, and maintain internal platforms and integrations. The role involves a React/TypeScript frontend, a .NET/C# backend, and an API layer hosted on Azure with Microsoft 365 integration.

You will work in a small team, focusing on data-first product development, documented testing, security, and governance, including OpenTofu/Terraform for infrastructure as code and AI-assisted coding practices.