Principal Engineer (.NET)

Location: Hybrid work from the Milton Keynes office, United Kingdom

Company

hirify.global develops employee benefits and engagement solutions, including digital products and platforms for payments, discounts, rewards, benefits, analytics, mobile applications, and web portals.

What you will do

• Own and evolve the end-to-end architecture for .NET digital products and shared platform capabilities.
• Provide technical leadership across product squads, including design decisions, prototypes, code reviews, troubleshooting, and delivery of high-risk components.
• Shape modernization roadmaps for legacy .NET applications through API enablement, decomposition, cloud adoption, and technical debt reduction.
• Guide the use of Azure services, containers, messaging, API management, relational and NoSQL data platforms, and reusable global components.
• Establish engineering standards for secure coding, automated testing, observability, resilience, accessibility, and operational readiness.
• Maintain architecture documentation, decision records, governance controls, security practices, and audit evidence.

Requirements

• Extensive experience designing, building, and operating enterprise-grade .NET products across multiple delivery teams or complex platforms.
• Deep practical knowledge of C#, modern .NET, ASP.NET Core, RESTful APIs, distributed systems, asynchronous messaging, and SQL-based data platforms.
• Experience modernizing legacy .NET Framework applications and working with MVC, Entity Framework, T-SQL, stored procedures, Web API, SOAP, and WCF integrations.
• Strong understanding of software architecture, domain-driven design, modular architecture, microservices trade-offs, integration patterns, API lifecycle management, and architecture documentation.
• Hands-on experience with Azure services, CI/CD, automated testing, observability, incident diagnosis, reliability engineering, and DevSecOps.
• Fluent English is required. A degree in Computer Science, Software Engineering, or a related discipline, or equivalent professional experience, is expected.

Nice to have

• Experience in payments, prepaid cards, employee benefits, rewards, vouchers, cashback, or regulated financial services.
• Experience with Blazor, modern JavaScript frameworks, or .NET MAUI.
• Azure or architecture certifications, FinOps, cloud cost optimization, accessibility, and software supply-chain security knowledge.
• Experience working in a multi-country enterprise and integrating global platforms with country-specific products.
• French language skills.

Culture & Benefits

• Inclusive workplace focused on diversity and individual contribution.
• Collaboration with 5,000 experts across 29 countries.
• Opportunity to develop digital experiences used by millions of people.
• Support for career development, work-life balance, and learning new skills.
• Work connected to sustainability, diversity, and support for local economies.