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Freelance Software Engineer .NET

Rotterdam💼 Contract🗓 2026-07-28 → 2026-09-26

Core

Design, build, and implement frontend and backend APIs for mission-critical IT solutions supporting customer business operations.

Role type

Senior .NET Software Engineer (Freelance/Contract)

Builds

Robust and efficient backend services and frontend APIs within an event-driven architecture

Domain

Enterprise IT / Cloud-native development

Deliverable

production ML models | product features

Required skills

.NET Core (C#), Web API (C#), Azure services (App Service, API Management, Data Factory, Monitor, App Insights), event-driven architecture, TDD, BDD, SOLID, design patterns, test automation frameworks

Preferred skills

on-premises and public cloud (AWS, Azure), Infrastructure as Code (ARM, Bicep), large distributed systems, Scrum/Agile/DevOps, CI/CD pipelines (SonarQube, Renovate, AZDO, GitHub), financial services domain experience

Technologies

.NET Core, C#, Azure, AWS, ARM, Bicep, SonarQube, Renovate, AZDO, GitHub

Responsibilities

End-to-end development from intake to deployment, designing and implementing APIs, collaborating with customer teams, bridging communication between clients and engineering teams

Seniority

Senior, hands-on IC

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