Full-Stack Developer

Job Description

The Full-Stack Developer will design, build, and maintain the internal platforms, applications, and integrations that run Milestone One’s business. Our applications have a React/TypeScript front end, an API layer, and a database backend, hosted on Azure and integrated with Microsoft 365. We work data-first: we design and document the data structure, build the API from that specification, and then build the front end. You will work in a small team alongside AI coding agents, with security, data protection, and documented testing built into how we deliver.

Role responsibilities:

· Design and document data models and databases (Azure SQL) for our central data platform, internal applications, and reporting

· Develop secure REST APIs and backend services (.NET / C#, Azure App Service or Functions), with access checks in the API and permissions enforced at both the API and data layers

· Build React/TypeScript front ends that integrate with our company intranet and follow the Milestone One design system

· Build integrations between internal systems and third-party services (APIs, webhooks, data imports)

· Work in GitHub: pull requests, code reviews, GitHub Actions CI/CD, and automated code and secret scanning

· Define infrastructure as code with OpenTofu, using Managed Identity and Key Vault instead of stored secrets

· Write automated tests with Playwright and support business users during acceptance testing

· Use AI coding agents productively and safely, reviewing, testing, and taking ownership of all generated code

· Follow our change management and system validation procedures, and keep technical documentation current

· Collaborate with stakeholders to shape requirements and turn them into working solutions

Qualifications

· Professional experience building web applications with React/TypeScript and a backend language such as C# / .NET (we welcome both experienced and early-career developers)

· SQL — schema design, data modelling, and writing efficient queries

· REST API design, authentication and authorization (Entra ID, OAuth 2.0 / OpenID Connect)

· Git branching, pull requests, and code review; CI/CD pipelines (GitHub Actions or Azure DevOps)

· Azure fundamentals — App Service, Azure SQL, Blob Storage, Key Vault, Managed Identity

· Secure coding practices (e.g. OWASP Top 10) and care for personal and sensitive data

· Willingness to work in a regulated environment: change control, testing evidence, audit trails, and data integrity

· Fluent in English, written and spoken
 

Nice to Have

· .NET 8 / C# — REST API development (Entity Framework or Dapper)

· Infrastructure as code with OpenTofu or Terraform

· Automated testing with Playwright or similar tools

· Professional experience working with AI coding agents or assistants

· Azure Functions, Static Web Apps, API Management, Front Door / WAF v2

· Star schema / dimensional modelling (staging → dimension → fact ETL)

· Microsoft Graph API and Microsoft 365 integration

· Clinical trial domain knowledge (sites, studies, patients, financial events)

· Knowledge of data protection requirements such as GDPR and HIPAA

Additional Information

If you feel it is time to make your skills and knowledge visible within a developing company with true focus on its people, then Milestone One is the right choice for you.

Company Description

Milestone One is a Site Enabling Services organization with global headquarters in Zug, Switzerland. We understand what clinical study sites need and our overall mission is to support sites in stronger study delivery.