Senior Fullstack Developer (.NET, React, Claude)

Job Description

We’re hiring a hands-on Software Engineers to help us build two brand-new products. This is a total greenfield setup: new architecture, new codebases, new delivery approach, built as separate systems in .NET + React, with a strong focus on AI-first engineering. Day to day, you’ll use tools like Claude Code and work with a framework that leverages AI agents to speed up delivery, improve quality, and automate repetitive development work.You’ll join early, which means real influence: shaping architecture and technical direction, helping define quality standards, testing approach, deployments, and how the team works. The setup is closer to a startup-style product team than a rigid corporate project, while still having dedicated Engineering Manager, Product Manager, and Tech Lead to support delivery.What you’ll do:Build backend services and RESTful APIs using C#/.NET (.NET Core / .NET)Develop and evolve web frontends in React (experience layer / UI consuming APIs)Contribute to solution design in a service-oriented / microservices architectureUse Claude Code in daily work: prompt-driven coding, refactoring, test generation, and building/iterating on coding agentsHelp establish and improve engineering practices: testing strategy, code standards, CI/CD, quality automationImplement and enhance observability (logging, metrics, tracing) and API monitoringWork with cloud-native services (Azure/AWS/GCP) and containerised deployments (e.g., Kubernetes)Collaborate in an Agile setup: refinement, estimation, code reviews, continuous improvementWhat we’re looking for:minimum 5 years of professional software development experienceStrong commercial experience with C#/.NET and building REST APIsProven delivery of web applications / SaaS productsSolid engineering fundamentals (data structures, algorithms, design patterns)Experience with cloud architectures (Azure, AWS or GCP) and cloud-native servicesUnderstanding of distributed systems concepts (scalability, reliability, concurrency)Strong problem-solving skills, clear communication, and a collaborative mindsetGenuine interest in combining classic software engineering with practical AI tooling (Claude / agents)Nice to have:Experience with API gateways, identity/authentication, messaging (Kafka/SQS/RabbitMQ)Workflow orchestration / job scheduling / search-related experienceContainer orchestration knowledge (Kubernetes/Nomad/Mesos)Strong front-end fundamentals beyond React (HTML/CSS/JS best practices)Experience leading technical initiatives or acting as a go-to engineer on key topics